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cHTTP/chttp.c
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cozis 22e9dee5dc Add docs
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/*
* HTTP Library - Amalgamated Source
* Generated automatically - do not edit manually
*/
#include "http.h"
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <openssl/bn.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
#include <openssl/x509v3.h>
#include <poll.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <unistd.h>
//////////////////////////////////////////////////////////////////////
// src/cert.h
//////////////////////////////////////////////////////////////////////
// This is an utility to create self-signed certificates
// useful when testing HTTPS servers locally. This is only
// meant to be used by people starting out with a library
// and simplifying the zero to one phase.
//
// The C, O, and CN are respectively country name, organization name,
// and common name of the certificate. For instance:
//
// C="IT"
// O="My Organization"
// CN="my_website.com"
//
// The output is a certificate file in PEM format and a private
// key file with the key used to sign the certificate.
int http_create_test_certificate(HTTP_String C, HTTP_String O, HTTP_String CN,
HTTP_String cert_file, HTTP_String key_file);
//////////////////////////////////////////////////////////////////////
// src/socket.h
//////////////////////////////////////////////////////////////////////
// This is a socket abstraction module for non-blocking TCP and TLS sockets.
//
// Sockets may be in a number of states based on if they are plain TCP or TLS
// sockets. Users generally only care about when the connection is established
// or is terminated.
//
// Sockets can be created by connecting to a server using one of these:
//
// socket_connect
// socket_connect_ipv4
// socket_connect_ipv6
//
// They allow connecting to a remote host by specifying its name, of IP address.
// Or by interning a socket accepted by a listening socket:
//
// socket_accept
//
// after creation, the event field will hold one of the values:
//
// SOCKET_WANT_READ
// SOCKET_WANT_WRITE
//
// Which respectively mean that the socket object needs to read or write
// from the underlying socket, and to do so non-blockingly, the caller needs
// to wait for the socket being ready for that operation. This is one way
// to do it:
//
// // Translate the socket event field to poll() flags
// int events;
// if (sock.event == SOCKET_WANT_READ)
// events = POLLIN;
// else if (sock.event == SOCKET_WANT_WRITE)
// events = POLLOUT;
//
// // block until the socket is ready
// struct pollfd buf;
// buf.fd = sock.fd;
// buf.events = events;
// buf.revents = 0;
// poll(&buf, 1, -1);
//
// whenever a socket is ready, the user must call the socket_update
// function. Then, if the socket is in the SOCKET_STATE_ESTABLISHED_READY
// state, the user can call one of
//
// socket_close
// socket_read
// socket_write
//
// At any point the socket could reach the SOCKET_STATE_DIED state,
// which means the user needs to call socket_free to free the socket
// as it's not unusable.
typedef struct {
int is_ipv6;
union {
HTTP_IPv4 ipv4;
HTTP_IPv6 ipv6;
} addr;
} AddrInfo;
typedef enum {
SOCKET_STATE_PENDING,
SOCKET_STATE_CONNECTING,
SOCKET_STATE_CONNECTED,
SOCKET_STATE_ACCEPTED,
SOCKET_STATE_ESTABLISHED_WAIT,
SOCKET_STATE_ESTABLISHED_READY,
SOCKET_STATE_SHUTDOWN,
SOCKET_STATE_DIED
} SocketState;
typedef enum {
SOCKET_WANT_NONE,
SOCKET_WANT_READ,
SOCKET_WANT_WRITE,
} SocketWantEvent;
typedef struct {
SocketState state;
SocketWantEvent event;
int fd;
SSL *ssl;
SSL_CTX *ssl_ctx;
AddrInfo *addr_list;
int addr_count;
int addr_cursor;
char *hostname;
uint16_t port;
} Socket;
typedef struct {
char name[128];
SSL_CTX *ssl_ctx;
} Domain;
typedef struct {
SSL_CTX *ssl_ctx;
int num_domains;
int max_domains;
Domain *domains;
} SocketGroup;
void socket_global_init (void);
void socket_global_free (void);
int socket_group_init (SocketGroup *group);
int socket_group_init_server(SocketGroup *group, HTTP_String cert_file, HTTP_String key_file);
int socket_group_add_domain(SocketGroup *group, HTTP_String domain, HTTP_String cert_key, HTTP_String private_key);
void socket_group_free (SocketGroup *group);
SocketState socket_state (Socket *sock);
void socket_accept (Socket *sock, SocketGroup *group, int fd);
void socket_connect (Socket *sock, SocketGroup *group, HTTP_String host, uint16_t port);
void socket_connect_ipv4 (Socket *sock, SocketGroup *group, HTTP_IPv4 addr, uint16_t port);
void socket_connect_ipv6 (Socket *sock, SocketGroup *group, HTTP_IPv6 addr, uint16_t port);
void socket_update (Socket *sock);
int socket_read (Socket *sock, char *dst, int max);
int socket_write (Socket *sock, char *src, int len);
void socket_close (Socket *sock);
void socket_free (Socket *sock);
int socket_wait (Socket **socks, int num_socks);
//////////////////////////////////////////////////////////////////////
// src/basic.c
//////////////////////////////////////////////////////////////////////
bool http_streq(HTTP_String s1, HTTP_String s2)
{
if (s1.len != s2.len)
return false;
for (int i = 0; i < s1.len; i++)
if (s1.ptr[i] != s2.ptr[i])
return false;
return true;
}
static char to_lower(char c)
{
if (c >= 'A' && c <= 'Z')
return c - 'A' + 'a';
return c;
}
bool http_streqcase(HTTP_String s1, HTTP_String s2)
{
if (s1.len != s2.len)
return false;
for (int i = 0; i < s1.len; i++)
if (to_lower(s1.ptr[i]) != to_lower(s2.ptr[i]))
return false;
return true;
}
HTTP_String http_trim(HTTP_String s)
{
int i = 0;
while (i < s.len && (s.ptr[i] == ' ' || s.ptr[i] == '\t'))
i++;
if (i == s.len) {
s.ptr = NULL;
s.len = 0;
} else {
s.ptr += i;
s.len -= i;
while (s.ptr[s.len-1] == ' ' || s.ptr[s.len-1] == '\t')
s.len--;
}
return s;
}
static bool is_printable(char c)
{
return c >= ' ' && c <= '~';
}
void print_bytes(HTTP_String prefix, HTTP_String src)
{
if (src.len == 0)
return;
FILE *stream = stdout;
bool new_line = true;
int cur = 0;
for (;;) {
int start = cur;
while (cur < src.len && is_printable(src.ptr[cur]))
cur++;
if (new_line) {
fwrite(prefix.ptr, 1, prefix.len, stream);
new_line = false;
}
fwrite(src.ptr + start, 1, cur - start, stream);
if (cur == src.len)
break;
if (src.ptr[cur] == '\n') {
putc('\\', stream);
putc('n', stream);
putc('\n', stream);
new_line = true;
} else if (src.ptr[cur] == '\r') {
putc('\\', stream);
putc('r', stream);
} else {
putc('.', stream);
}
cur++;
}
putc('\n', stream);
}//////////////////////////////////////////////////////////////////////
// src/parse.c
//////////////////////////////////////////////////////////////////////
// From RFC 9112
// request-target = origin-form
// / absolute-form
// / authority-form
// / asterisk-form
// origin-form = absolute-path [ "?" query ]
// absolute-form = absolute-URI
// authority-form = uri-host ":" port
// asterisk-form = "*"
//
// From RFC 9110
// URI-reference = <URI-reference, see [URI], Section 4.1>
// absolute-URI = <absolute-URI, see [URI], Section 4.3>
// relative-part = <relative-part, see [URI], Section 4.2>
// authority = <authority, see [URI], Section 3.2>
// uri-host = <host, see [URI], Section 3.2.2>
// port = <port, see [URI], Section 3.2.3>
// path-abempty = <path-abempty, see [URI], Section 3.3>
// segment = <segment, see [URI], Section 3.3>
// query = <query, see [URI], Section 3.4>
//
// absolute-path = 1*( "/" segment )
// partial-URI = relative-part [ "?" query ]
//
// From RFC 3986:
// segment = *pchar
// pchar = unreserved / pct-encoded / sub-delims / ":" / "@"
// pct-encoded = "%" HEXDIG HEXDIG
// sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
// / "*" / "+" / "," / ";" / "="
// unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
// query = *( pchar / "/" / "?" )
// absolute-URI = scheme ":" hier-part [ "?" query ]
// hier-part = "//" authority path-abempty
// / path-absolute
// / path-rootless
// / path-empty
// scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
typedef struct {
char *src;
int len;
int cur;
} Scanner;
static int is_digit(char c)
{
return c >= '0' && c <= '9';
}
static int is_alpha(char c)
{
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
static int is_hex_digit(char c)
{
return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
}
// From RFC 3986:
// sub-delims = "!" / "$" / "&" / "'" / "(" / ")"
// / "*" / "+" / "," / ";" / "="
static int is_sub_delim(char c)
{
return c == '!' || c == '$' || c == '&' || c == '\''
|| c == '(' || c == ')' || c == '*' || c == '+'
|| c == ',' || c == ';' || c == '=';
}
// From RFC 3986:
// unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
static int is_unreserved(char c)
{
return is_alpha(c) || is_digit(c)
|| c == '-' || c == '.'
|| c == '_' || c == '~';
}
// From RFC 3986:
// pchar = unreserved / pct-encoded / sub-delims / ":" / "@"
static int is_pchar(char c)
{
return is_unreserved(c) || is_sub_delim(c) || c == ':' || c == '@';
}
static int is_tchar(char c)
{
return is_digit(c) || is_alpha(c)
|| c == '!' || c == '#' || c == '$'
|| c == '%' || c == '&' || c == '\''
|| c == '*' || c == '+' || c == '-'
|| c == '.' || c == '^' || c == '_'
|| c == '~';
}
static int is_vchar(char c)
{
return c >= ' ' && c <= '~';
}
static int
consume_absolute_path(Scanner *s)
{
if (s->cur == s->len || s->src[s->cur] != '/')
return -1; // ERROR
s->cur++;
for (;;) {
while (s->cur < s->len && is_pchar(s->src[s->cur]))
s->cur++;
if (s->cur == s->len || s->src[s->cur] != '/')
break;
s->cur++;
}
return 0;
}
// If abempty=1:
// path-abempty = *( "/" segment )
// else:
// path-absolute = "/" [ segment-nz *( "/" segment ) ]
// path-rootless = segment-nz *( "/" segment )
// path-empty = 0<pchar>
static int parse_path(Scanner *s, HTTP_String *path, int abempty)
{
int start = s->cur;
if (abempty) {
// path-abempty
while (s->cur < s->len && s->src[s->cur] == '/') {
do
s->cur++;
while (s->cur < s->len && is_pchar(s->src[s->cur]));
}
} else if (s->cur < s->len && (s->src[s->cur] == '/')) {
// path-absolute
s->cur++;
if (s->cur < s->len && is_pchar(s->src[s->cur])) {
s->cur++;
for (;;) {
while (s->cur < s->len && is_pchar(s->src[s->cur]))
s->cur++;
if (s->cur == s->len || s->src[s->cur] != '/')
break;
s->cur++;
}
}
} else if (s->cur < s->len && is_pchar(s->src[s->cur])) {
// path-rootless
s->cur++;
for (;;) {
while (s->cur < s->len && is_pchar(s->src[s->cur]))
s->cur++;
if (s->cur == s->len || s->src[s->cur] != '/')
break;
s->cur++;
}
} else {
// path->empty
// (do nothing)
}
*path = (HTTP_String) {
s->src + start,
s->cur - start,
};
if (path->len == 0)
path->ptr = NULL;
return 0;
}
// RFC 3986:
// query = *( pchar / "/" / "?" )
static int is_query(char c)
{
return is_pchar(c) || c == '/' || c == '?';
}
// RFC 3986:
// fragment = *( pchar / "/" / "?" )
static int is_fragment(char c)
{
return is_pchar(c) || c == '/' || c == '?';
}
static int little_endian(void)
{
uint16_t x = 1;
return *((uint8_t*) &x);
}
static void invert_bytes(void *p, int len)
{
char *c = p;
for (int i = 0; i < len/2; i++) {
char tmp = c[i];
c[i] = c[len-i-1];
c[len-i-1] = tmp;
}
}
static int parse_ipv4(Scanner *s, HTTP_IPv4 *ipv4)
{
unsigned int out = 0;
int i = 0;
for (;;) {
if (s->cur == s->len || !is_digit(s->src[s->cur]))
return -1;
int b = 0;
do {
int x = s->src[s->cur++] - '0';
if (b > (UINT8_MAX - x) / 10)
return -1;
b = b * 10 + x;
} while (s->cur < s->len && is_digit(s->src[s->cur]));
out <<= 8;
out |= (unsigned char) b;
i++;
if (i == 4)
break;
if (s->cur == s->len || s->src[s->cur] != '.')
return -1;
s->cur++;
}
if (little_endian())
invert_bytes(&out, 4);
ipv4->data = out;
return 0;
}
static int hex_digit_to_int(char c)
{
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
if (c >= 'A' && c <= 'F') return c - 'A' + 10;
if (c >= '0' && c <= '9') return c - '0';
return -1;
}
static int parse_ipv6_comp(Scanner *s)
{
unsigned short buf;
if (s->cur == s->len || !is_hex_digit(s->src[s->cur]))
return -1;
buf = hex_digit_to_int(s->src[s->cur]);
s->cur++;
if (s->cur == s->len || !is_hex_digit(s->src[s->cur]))
return buf;
buf <<= 4;
buf |= hex_digit_to_int(s->src[s->cur]);
s->cur++;
if (s->cur == s->len || !is_hex_digit(s->src[s->cur]))
return buf;
buf <<= 4;
buf |= hex_digit_to_int(s->src[s->cur]);
s->cur++;
if (s->cur == s->len || !is_hex_digit(s->src[s->cur]))
return buf;
buf <<= 4;
buf |= hex_digit_to_int(s->src[s->cur]);
s->cur++;
return (int) buf;
}
static int parse_ipv6(Scanner *s, HTTP_IPv6 *ipv6)
{
unsigned short head[8];
unsigned short tail[8];
int head_len = 0;
int tail_len = 0;
if (s->len - s->cur > 1
&& s->src[s->cur+0] == ':'
&& s->src[s->cur+1] == ':')
s->cur += 2;
else {
for (;;) {
int ret = parse_ipv6_comp(s);
if (ret < 0) return ret;
head[head_len++] = (unsigned short) ret;
if (head_len == 8) break;
if (s->cur == s->len || s->src[s->cur] != ':')
return -1;
s->cur++;
if (s->cur < s->len && s->src[s->cur] == ':') {
s->cur++;
break;
}
}
}
if (head_len < 8) {
while (s->cur < s->len && is_hex_digit(s->src[s->cur])) {
int ret = parse_ipv6_comp(s);
if (ret < 0) return ret;
tail[tail_len++] = (unsigned short) ret;
if (head_len + tail_len == 8) break;
if (s->cur == s->len || s->src[s->cur] != ':')
break;
s->cur++;
}
}
for (int i = 0; i < head_len; i++)
ipv6->data[i] = head[i];
for (int i = 0; i < 8 - head_len - tail_len; i++)
ipv6->data[head_len + i] = 0;
for (int i = 0; i < tail_len; i++)
ipv6->data[8 - tail_len + i] = tail[i];
if (little_endian())
for (int i = 0; i < 8; i++)
invert_bytes(&ipv6->data[i], 2);
return 0;
}
// From RFC 3986:
// reg-name = *( unreserved / pct-encoded / sub-delims )
static int is_regname(char c)
{
return is_unreserved(c) || is_sub_delim(c);
}
static int parse_regname(Scanner *s, HTTP_String *regname)
{
if (s->cur == s->len || !is_regname(s->src[s->cur]))
return -1;
int start = s->cur;
do
s->cur++;
while (s->cur < s->len && is_regname(s->src[s->cur]));
regname->ptr = s->src + start;
regname->len = s->cur - start;
return 0;
}
static int parse_host(Scanner *s, HTTP_Host *host)
{
int ret;
if (s->cur < s->len && s->src[s->cur] == '[') {
s->cur++;
int start = s->cur;
HTTP_IPv6 ipv6;
ret = parse_ipv6(s, &ipv6);
if (ret < 0) return ret;
host->mode = HTTP_HOST_MODE_IPV6;
host->ipv6 = ipv6;
host->text = (HTTP_String) { s->src + start, s->cur - start };
if (s->cur == s->len || s->src[s->cur] != ']')
return -1;
s->cur++;
} else {
int start = s->cur;
HTTP_IPv4 ipv4;
ret = parse_ipv4(s, &ipv4);
if (ret >= 0) {
host->mode = HTTP_HOST_MODE_IPV4;
host->ipv4 = ipv4;
} else {
s->cur = start;
HTTP_String regname;
ret = parse_regname(s, &regname);
if (ret < 0) return ret;
host->mode = HTTP_HOST_MODE_NAME;
host->name = regname;
}
host->text = (HTTP_String) { s->src + start, s->cur - start };
}
return 0;
}
// scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
static int is_scheme_head(char c)
{
return is_alpha(c);
}
static int is_scheme_body(char c)
{
return is_alpha(c)
|| is_digit(c)
|| c == '+'
|| c == '-'
|| c == '.';
}
// userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
static int is_userinfo(char c)
{
return is_unreserved(c) || is_sub_delim(c) || c == ':'; // TODO: PCT encoded
}
// authority = [ userinfo "@" ] host [ ":" port ]
static int parse_authority(Scanner *s, HTTP_Authority *authority)
{
HTTP_String userinfo;
{
int start = s->cur;
while (s->cur < s->len && is_userinfo(s->src[s->cur]))
s->cur++;
if (s->cur < s->len && s->src[s->cur] == '@') {
userinfo = (HTTP_String) {
s->src + start,
s->cur - start
};
s->cur++;
} else {
// Rollback
s->cur = start;
userinfo = (HTTP_String) {NULL, 0};
}
}
HTTP_Host host;
{
int ret = parse_host(s, &host);
if (ret < 0)
return ret;
}
int port = 0;
if (s->cur < s->len && s->src[s->cur] == ':') {
s->cur++;
if (s->cur < s->len && is_digit(s->src[s->cur])) {
port = s->src[s->cur++] - '0';
while (s->cur < s->len && is_digit(s->src[s->cur])) {
int x = s->src[s->cur++] - '0';
if (port > (UINT16_MAX - x) / 10)
return -1; // ERROR: Port too big
port = port * 10 + x;
}
}
}
authority->userinfo = userinfo;
authority->host = host;
authority->port = port;
return 0;
}
static int parse_uri(Scanner *s, HTTP_URL *url, int allow_fragment)
{
HTTP_String scheme = {0};
{
int start = s->cur;
if (s->cur == s->len || !is_scheme_head(s->src[s->cur]))
return -1; // ERROR: Missing scheme
do
s->cur++;
while (s->cur < s->len && is_scheme_body(s->src[s->cur]));
scheme = (HTTP_String) {
s->src + start,
s->cur - start,
};
if (s->cur == s->len || s->src[s->cur] != ':')
return -1; // ERROR: Missing ':' after scheme
s->cur++;
}
int abempty = 0;
HTTP_Authority authority = {0};
if (s->len - s->cur > 1
&& s->src[s->cur+0] == '/'
&& s->src[s->cur+1] == '/') {
s->cur += 2;
int ret = parse_authority(s, &authority);
if (ret < 0) return ret;
abempty = 1;
}
HTTP_String path;
int ret = parse_path(s, &path, abempty);
if (ret < 0) return ret;
HTTP_String query = {0};
if (s->cur < s->len && s->src[s->cur] == '?') {
int start = s->cur;
do
s->cur++;
while (s->cur < s->len && is_query(s->src[s->cur]));
query = (HTTP_String) {
s->src + start,
s->cur - start,
};
}
HTTP_String fragment = {0};
if (allow_fragment && s->cur < s->len && s->src[s->cur] == '#') {
int start = s->cur;
do
s->cur++;
while (s->cur < s->len && is_fragment(s->src[s->cur]));
fragment = (HTTP_String) {
s->src + start,
s->cur - start,
};
}
url->scheme = scheme;
url->authority = authority;
url->path = path;
url->query = query;
url->fragment = fragment;
return 1;
}
// authority-form = host ":" port
// host = IP-literal / IPv4address / reg-name
// IP-literal = "[" ( IPv6address / IPvFuture ) "]"
// reg-name = *( unreserved / pct-encoded / sub-delims )
static int parse_authority_form(Scanner *s, HTTP_Host *host, int *port)
{
int ret;
ret = parse_host(s, host);
if (ret < 0) return ret;
// Default port value
*port = 0;
if (s->cur == s->len || s->src[s->cur] != ':')
return 0; // No port
s->cur++;
if (s->cur == s->len || !is_digit(s->src[s->cur]))
return 0; // No port
int buf = 0;
do {
int x = s->src[s->cur++] - '0';
if (buf > (UINT16_MAX - x) / 10)
return -1; // ERROR
buf = buf * 10 + x;
} while (s->cur < s->len && is_digit(s->src[s->cur]));
*port = buf;
return 0;
}
static int parse_origin_form(Scanner *s, HTTP_String *path, HTTP_String *query)
{
int ret, start;
start = s->cur;
ret = consume_absolute_path(s);
if (ret < 0) return ret;
*path = (HTTP_String) { s->src + start, s->cur - start };
if (s->cur < s->len && s->src[s->cur] == '?') {
start = s->cur;
do
s->cur++;
while (s->cur < s->len && is_query(s->src[s->cur]));
*query = (HTTP_String) { s->src + start, s->cur - start };
} else
*query = (HTTP_String) { NULL, 0 };
return 0;
}
static int parse_asterisk_form(Scanner *s)
{
if (s->len - s->cur < 2
|| s->src[s->cur+0] != '*'
|| s->src[s->cur+1] != ' ')
return -1;
s->cur++;
return 0;
}
static int parse_request_target(Scanner *s, HTTP_URL *url)
{
int ret;
memset(url, 0, sizeof(HTTP_URL));
// asterisk-form
ret = parse_asterisk_form(s);
if (ret >= 0) return ret;
ret = parse_uri(s, url, 0);
if (ret >= 0) return ret;
ret = parse_authority_form(s, &url->authority.host, &url->authority.port);
if (ret >= 0) return ret;
ret = parse_origin_form(s, &url->path, &url->query);
if (ret >= 0) return ret;
return -1;
}
static int is_header_body(char c)
{
return is_vchar(c) || c == ' ' || c == '\t';
}
static int parse_headers(Scanner *s, HTTP_Header *headers, int max_headers)
{
int num_headers = 0;
for (;;) {
if (s->len - s->cur > 1
&& s->src[s->cur+0] == '\r'
&& s->src[s->cur+1] == '\n') {
s->cur += 2;
break;
}
// RFC 9112:
// field-line = field-name ":" OWS field-value OWS
//
// RFC 9110:
// field-value = *field-content
// field-content = field-vchar
// [ 1*( SP / HTAB / field-vchar ) field-vchar ]
// field-vchar = VCHAR / obs-text
// obs-text = %x80-FF
int start;
if (s->cur == s->len || !is_tchar(s->src[s->cur]))
return -1; // ERROR
start = s->cur;
do
s->cur++;
while (s->cur < s->len && is_tchar(s->src[s->cur]));
HTTP_String name = { s->src + start, s->cur - start };
if (s->cur == s->len || s->src[s->cur] != ':')
return -1; // ERROR
s->cur++;
start = s->cur;
while (s->cur < s->len && is_header_body(s->src[s->cur]))
s->cur++;
HTTP_String body = { s->src + start, s->cur - start };
body = http_trim(body);
if (s->len - s->cur < 2
|| s->src[s->cur+0] != '\r'
|| s->src[s->cur+1] != '\n')
return -1; // ERROR
s->cur += 2;
if (num_headers < max_headers)
headers[num_headers++] = (HTTP_Header) { name, body };
}
return num_headers;
}
static int
parse_content_length(const char *src, int len, unsigned long long *out)
{
int cur = 0;
while (cur < len && (src[cur] == ' ' || src[cur] == '\t'))
cur++;
if (cur == len || !is_digit(src[cur]))
return -1;
unsigned long long buf = 0;
do {
int d = src[cur++] - '0';
if (buf > (UINT64_MAX - d) / 10)
return -1;
buf = buf * 10 + d;
} while (cur < len && is_digit(src[cur]));
*out = buf;
return 0;
}
static int contains_head(char *src, int len)
{
int cur = 0;
while (len - cur > 3) {
if (src[cur+0] == '\r' &&
src[cur+1] == '\n' &&
src[cur+2] == '\r' &&
src[cur+3] == '\n')
return 1;
cur++;
}
return 0;
}
static int parse_request(Scanner *s, HTTP_Request *req)
{
if (!contains_head(s->src + s->cur, s->len - s->cur))
return 0;
if (s->len - s->cur >= 3
&& s->src[s->cur+0] == 'G'
&& s->src[s->cur+1] == 'E'
&& s->src[s->cur+2] == 'T') {
s->cur += 3;
req->method = HTTP_METHOD_GET;
} else if (s->len - s->cur >= 4
&& s->src[s->cur+0] == 'P'
&& s->src[s->cur+1] == 'O'
&& s->src[s->cur+2] == 'S'
&& s->src[s->cur+3] == 'T') {
s->cur += 4;
req->method = HTTP_METHOD_POST;
} else if (s->len - s->cur >= 3
&& s->src[s->cur+0] == 'P'
&& s->src[s->cur+1] == 'U'
&& s->src[s->cur+2] == 'T') {
s->cur += 3;
req->method = HTTP_METHOD_PUT;
} else if (s->len - s->cur >= 4
&& s->src[s->cur+0] == 'H'
&& s->src[s->cur+1] == 'E'
&& s->src[s->cur+2] == 'A'
&& s->src[s->cur+3] == 'D') {
s->cur += 4;
req->method = HTTP_METHOD_HEAD;
} else if (s->len - s->cur >= 6
&& s->src[s->cur+0] == 'D'
&& s->src[s->cur+1] == 'E'
&& s->src[s->cur+2] == 'L'
&& s->src[s->cur+3] == 'E'
&& s->src[s->cur+4] == 'T'
&& s->src[s->cur+5] == 'E') {
s->cur += 6;
req->method = HTTP_METHOD_DELETE;
} else if (s->len - s->cur >= 7
&& s->src[s->cur+0] == 'C'
&& s->src[s->cur+1] == 'O'
&& s->src[s->cur+2] == 'N'
&& s->src[s->cur+3] == 'N'
&& s->src[s->cur+4] == 'E'
&& s->src[s->cur+5] == 'C'
&& s->src[s->cur+6] == 'T') {
s->cur += 7;
req->method = HTTP_METHOD_CONNECT;
} else if (s->len - s->cur >= 7
&& s->src[s->cur+0] == 'O'
&& s->src[s->cur+1] == 'P'
&& s->src[s->cur+2] == 'T'
&& s->src[s->cur+3] == 'I'
&& s->src[s->cur+4] == 'O'
&& s->src[s->cur+5] == 'N'
&& s->src[s->cur+6] == 'S') {
s->cur += 7;
req->method = HTTP_METHOD_OPTIONS;
} else if (s->len - s->cur >= 5
&& s->src[s->cur+0] == 'T'
&& s->src[s->cur+1] == 'R'
&& s->src[s->cur+2] == 'A'
&& s->src[s->cur+3] == 'C'
&& s->src[s->cur+4] == 'E') {
s->cur += 5;
req->method = HTTP_METHOD_TRACE;
} else if (s->len - s->cur >= 5
&& s->src[s->cur+0] == 'P'
&& s->src[s->cur+1] == 'A'
&& s->src[s->cur+2] == 'T'
&& s->src[s->cur+3] == 'C'
&& s->src[s->cur+4] == 'H') {
s->cur += 5;
req->method = HTTP_METHOD_PATCH;
} else {
return -1;
}
if (s->cur == s->len || s->src[s->cur] != ' ')
return -1;
s->cur++;
{
Scanner s2 = *s;
int peek = s->cur;
while (peek < s->len && s->src[peek] != ' ')
peek++;
if (peek == s->len)
return -1;
s2.len = peek;
int ret = parse_request_target(&s2, &req->url);
if (ret < 0) return ret;
s->cur = s2.cur;
}
{
if (s->len - s->cur < 7
|| s->src[s->cur+0] != ' '
|| s->src[s->cur+1] != 'H'
|| s->src[s->cur+2] != 'T'
|| s->src[s->cur+3] != 'T'
|| s->src[s->cur+4] != 'P'
|| s->src[s->cur+5] != '/'
|| s->src[s->cur+6] != '1')
return -1; // ERROR
s->cur += 7;
if (s->cur == s->len || s->src[s->cur] != '.')
req->minor = 0;
else {
s->cur++;
if (s->cur == s->len || !is_digit(s->src[s->cur]))
return -1; // ERROR;
req->minor = s->src[s->cur] - '0';
s->cur++;
}
if (s->len - s->cur < 2
|| s->src[s->cur+0] != '\r'
|| s->src[s->cur+1] != '\n')
return -1; // ERROR
s->cur += 2;
}
int num_headers = parse_headers(s, req->headers, HTTP_MAX_HEADERS);
if (num_headers < 0)
return num_headers;
req->num_headers = num_headers;
// TODO
return 1;
}
int http_find_header(HTTP_Header *headers, int num_headers, HTTP_String name)
{
for (int i = 0; i < num_headers; i++)
if (http_streqcase(name, headers[i].name))
return i;
return -1;
}
static int parse_response(Scanner *s, HTTP_Response *res)
{
if (!contains_head(s->src + s->cur, s->len - s->cur))
return 0;
if (s->len - s->cur < 6
|| s->src[s->cur+0] != 'H'
|| s->src[s->cur+1] != 'T'
|| s->src[s->cur+2] != 'T'
|| s->src[s->cur+3] != 'P'
|| s->src[s->cur+4] != '/'
|| s->src[s->cur+5] != '1')
return -1; // ERROR
s->cur += 6;
if (s->cur == s->len || s->src[s->cur] != '.')
res->minor = 0;
else {
s->cur++;
if (s->cur == s->len || !is_digit(s->src[s->cur]))
return -1; // ERROR
res->minor = s->src[s->cur] - '0';
s->cur++;
}
if (s->len - s->cur < 5
|| s->src[s->cur+0] != ' '
|| !is_digit(s->src[s->cur+1])
|| !is_digit(s->src[s->cur+2])
|| !is_digit(s->src[s->cur+3])
|| s->src[s->cur+4] != ' ')
return -1;
s->cur += 5;
res->status =
(s->src[s->cur-2] - '0') * 1 +
(s->src[s->cur-3] - '0') * 10 +
(s->src[s->cur-4] - '0') * 100;
while (s->cur < s->len && (
s->src[s->cur] == '\t' ||
s->src[s->cur] == ' ' ||
is_vchar(s->src[s->cur]))) // TODO: obs-text
s->cur++;
if (s->len - s->cur < 2
|| s->src[s->cur+0] != '\r'
|| s->src[s->cur+1] != '\n')
return -1;
s->cur += 2;
int num_headers = parse_headers(s, res->headers, HTTP_MAX_HEADERS);
if (num_headers < 0)
return num_headers;
res->num_headers = num_headers;
int content_length_index = http_find_header(
res->headers, res->num_headers,
HTTP_STR("Content-Length"));
if (content_length_index == -1) {
res->body.ptr = NULL;
res->body.len = 0;
return 1;
}
// TODO: transfer-encoding
HTTP_String content_length_str = res->headers[content_length_index].value;
unsigned long long content_length;
if (parse_content_length(content_length_str.ptr, content_length_str.len, &content_length) < 0) {
HTTP_ASSERT(0); // TODO
}
if (content_length > 1<<20) {
HTTP_ASSERT(0); // TODO
}
if (content_length > (unsigned long long) (s->len - s->cur))
return 0;
res->body.ptr = s->src + s->cur;
res->body.len = content_length;
return 1;
}
int http_parse_ipv4(char *src, int len, HTTP_IPv4 *ipv4)
{
Scanner s = {src, len, 0};
int ret = parse_ipv4(&s, ipv4);
if (ret < 0) return ret;
return s.cur;
}
int http_parse_ipv6(char *src, int len, HTTP_IPv6 *ipv6)
{
Scanner s = {src, len, 0};
int ret = parse_ipv6(&s, ipv6);
if (ret < 0) return ret;
return s.cur;
}
int http_parse_url(char *src, int len, HTTP_URL *url)
{
Scanner s = {src, len, 0};
int ret = parse_uri(&s, url, 1);
if (ret == 1)
return s.cur;
return ret;
}
int http_parse_request(char *src, int len, HTTP_Request *req)
{
Scanner s = {src, len, 0};
int ret = parse_request(&s, req);
if (ret == 1)
return s.cur;
return ret;
}
int http_parse_response(char *src, int len, HTTP_Response *res)
{
Scanner s = {src, len, 0};
int ret = parse_response(&s, res);
if (ret == 1)
return s.cur;
return ret;
}
HTTP_String http_getqueryparam(HTTP_Request *req, HTTP_String name)
{
// TODO
return (HTTP_String) {NULL, 0};
}
HTTP_String http_getbodyparam(HTTP_Request *req, HTTP_String name)
{
// TODO
return (HTTP_String) {NULL, 0};
}
HTTP_String http_getcookie(HTTP_Request *req, HTTP_String name)
{
// TODO
return (HTTP_String) {NULL, 0};
}//////////////////////////////////////////////////////////////////////
// src/engine.c
//////////////////////////////////////////////////////////////////////
// This is the implementation of a byte queue useful
// for systems that need to process engs of bytes.
//
// It features sticky errors, a zero-copy interface,
// and a safe mechanism to patch previously written
// bytes.
//
// Only up to 4GB of data can be stored at once.
enum {
BYTE_QUEUE_ERROR = 1 << 0,
BYTE_QUEUE_READ = 1 << 1,
BYTE_QUEUE_WRITE = 1 << 2,
};
static void*
callback_malloc(HTTP_ByteQueue *queue, int len)
{
return queue->memfunc(HTTP_MEMFUNC_MALLOC, NULL, len, queue->memfuncdata);
}
static void
callback_free(HTTP_ByteQueue *queue, void *ptr, int len)
{
queue->memfunc(HTTP_MEMFUNC_FREE, ptr, len, queue->memfuncdata);
}
// Initialize the queue
static void
byte_queue_init(HTTP_ByteQueue *queue, unsigned int limit, HTTP_MemoryFunc memfunc, void *memfuncdata)
{
queue->flags = 0;
queue->head = 0;
queue->size = 0;
queue->used = 0;
queue->curs = 0;
queue->limit = limit;
queue->data = NULL;
queue->read_target = NULL;
queue->memfunc = memfunc;
queue->memfuncdata = memfuncdata;
}
// Deinitialize the queue
static void
byte_queue_free(HTTP_ByteQueue *queue)
{
if (queue->read_target) {
if (queue->read_target != queue->data)
callback_free(queue, queue->read_target, queue->read_target_size);
queue->read_target = NULL;
queue->read_target_size = 0;
}
callback_free(queue, queue->data, queue->size);
queue->data = NULL;
}
static int
byte_queue_error(HTTP_ByteQueue *queue)
{
return queue->flags & BYTE_QUEUE_ERROR;
}
static void
byte_queue_setlimit(HTTP_ByteQueue *queue, unsigned int value)
{
queue->limit = value;
}
static int
byte_queue_empty(HTTP_ByteQueue *queue)
{
return queue->used == 0;
}
// Start a read operation on the queue.
//
// This function returnes the pointer to the memory region containing the bytes
// to read. Callers can't read more than [*len] bytes from it. To complete the
// read, the [byte_queue_read_ack] function must be called with the number of
// bytes that were acknowledged by the caller.
//
// Note:
// - You can't have more than one pending read.
static char*
byte_queue_read_buf(HTTP_ByteQueue *queue, int *len)
{
if (queue->flags & BYTE_QUEUE_ERROR) {
*len = 0;
return NULL;
}
HTTP_ASSERT((queue->flags & BYTE_QUEUE_READ) == 0);
queue->flags |= BYTE_QUEUE_READ;
queue->read_target = queue->data;
queue->read_target_size = queue->size;
*len = queue->used;
if (queue->data == NULL)
return NULL;
return queue->data + queue->head;
}
// Complete a previously started operation on the queue.
static void
byte_queue_read_ack(HTTP_ByteQueue *queue, int num)
{
HTTP_ASSERT(num >= 0);
if (queue->flags & BYTE_QUEUE_ERROR)
return;
if ((queue->flags & BYTE_QUEUE_READ) == 0)
return;
queue->flags &= ~BYTE_QUEUE_READ;
HTTP_ASSERT((unsigned int) num <= queue->used);
queue->head += (unsigned int) num;
queue->used -= (unsigned int) num;
queue->curs += (unsigned int) num;
if (queue->read_target) {
if (queue->read_target != queue->data)
callback_free(queue, queue->read_target, queue->read_target_size);
queue->read_target = NULL;
queue->read_target_size = 0;
}
}
static char*
byte_queue_write_buf(HTTP_ByteQueue *queue, int *cap)
{
if ((queue->flags & BYTE_QUEUE_ERROR) || queue->data == NULL) {
*cap = 0;
return NULL;
}
HTTP_ASSERT((queue->flags & BYTE_QUEUE_WRITE) == 0);
queue->flags |= BYTE_QUEUE_WRITE;
unsigned int ucap = queue->size - (queue->head + queue->used);
if (ucap > INT_MAX) ucap = INT_MAX;
*cap = (int) ucap;
return queue->data + (queue->head + queue->used);
}
static void
byte_queue_write_ack(HTTP_ByteQueue *queue, int num)
{
HTTP_ASSERT(num >= 0);
if (queue->flags & BYTE_QUEUE_ERROR)
return;
if ((queue->flags & BYTE_QUEUE_WRITE) == 0)
return;
queue->flags &= ~BYTE_QUEUE_WRITE;
queue->used += (unsigned int) num;
}
// Sets the minimum capacity for the next write operation
// and returns 1 if the content of the queue was moved, else
// 0 is returned.
//
// You must not call this function while a write is pending.
// In other words, you must do this:
//
// byte_queue_write_setmincap(queue, mincap);
// dst = byte_queue_write_buf(queue, &cap);
// ...
// byte_queue_write_ack(num);
//
// And NOT this:
//
// dst = byte_queue_write_buf(queue, &cap);
// byte_queue_write_setmincap(queue, mincap); <-- BAD
// ...
// byte_queue_write_ack(num);
//
static int
byte_queue_write_setmincap(HTTP_ByteQueue *queue, int mincap)
{
HTTP_ASSERT(mincap >= 0);
unsigned int umincap = (unsigned int) mincap;
// Sticky error
if (queue->flags & BYTE_QUEUE_ERROR)
return 0;
// In general, the queue's contents look like this:
//
// size
// v
// [___xxxxxxxxxxxx________]
// ^ ^ ^
// 0 head head + used
//
// This function needs to make sure that at least [mincap]
// bytes are available on the right side of the content.
//
// We have 3 cases:
//
// 1) If there is enough memory already, this function doesn't
// need to do anything.
//
// 2) If there isn't enough memory on the right but there is
// enough free memory if we cound the left unused region,
// then the content is moved back to the
// start of the buffer.
//
// 3) If there isn't enough memory considering both sides, this
// function needs to allocate a new buffer.
//
// If there are pending read or write operations, the application
// is holding pointers to the buffer, so we need to make sure
// to not invalidate them. The only real problem is pending reads
// since this function can only be called before starting a write
// opearation.
//
// To avoid invalidating the read pointer when we allocate a new
// buffer, we don't free the old buffer. Instead, we store the
// pointer in the "old" field so that the read ack function can
// free it.
//
// To avoid invalidating the pointer when we are moving back the
// content since there is enough memory at the start of the buffer,
// we just avoid that. Even if there is enough memory considering
// left and right free regions, we allocate a new buffer.
HTTP_ASSERT((queue->flags & BYTE_QUEUE_WRITE) == 0);
unsigned int total_free_space = queue->size - queue->used;
unsigned int free_space_after_data = queue->size - queue->used - queue->head;
int moved = 0;
if (free_space_after_data < umincap) {
if (total_free_space < umincap || (queue->read_target == queue->data)) {
// Resize required
if (queue->used + umincap > queue->limit) {
queue->flags |= BYTE_QUEUE_ERROR;
return 0;
}
unsigned int size;
if (queue->size > UINT32_MAX / 2)
size = UINT32_MAX;
else
size = 2 * queue->size;
if (size < queue->used + umincap)
size = queue->used + umincap;
if (size > queue->limit)
size = queue->limit;
char *data = callback_malloc(queue, size);
if (!data) {
queue->flags |= BYTE_QUEUE_ERROR;
return 0;
}
if (queue->used > 0)
memcpy(data, queue->data + queue->head, queue->used);
if (queue->read_target != queue->data)
callback_free(queue, queue->data, queue->size);
queue->data = data;
queue->head = 0;
queue->size = size;
} else {
// Move required
memmove(queue->data, queue->data + queue->head, queue->used);
queue->head = 0;
}
moved = 1;
}
return moved;
}
static HTTP_ByteQueueOffset
byte_queue_offset(HTTP_ByteQueue *queue)
{
if (queue->flags & BYTE_QUEUE_ERROR)
return (HTTP_ByteQueueOffset) { 0 };
return (HTTP_ByteQueueOffset) { queue->curs + queue->used };
}
static unsigned int
byte_queue_size_from_offset(HTTP_ByteQueue *queue, HTTP_ByteQueueOffset off)
{
return queue->curs + queue->used - off;
}
static void
byte_queue_patch(HTTP_ByteQueue *queue, HTTP_ByteQueueOffset off,
char *src, unsigned int len)
{
if (queue->flags & BYTE_QUEUE_ERROR)
return;
// Check that the offset is in range
HTTP_ASSERT(off >= queue->curs && off - queue->curs < queue->used);
// Check that the length is in range
HTTP_ASSERT(len <= queue->used - (off - queue->curs));
// Perform the patch
char *dst = queue->data + queue->head + (off - queue->curs);
memcpy(dst, src, len);
}
static void
byte_queue_remove_from_offset(HTTP_ByteQueue *queue, HTTP_ByteQueueOffset offset)
{
if (queue->flags & BYTE_QUEUE_ERROR)
return;
unsigned long long num = (queue->curs + queue->used) - offset;
HTTP_ASSERT(num <= queue->used);
queue->used -= num;
}
static void
byte_queue_write(HTTP_ByteQueue *queue, const char *str, int len)
{
if (str == NULL) str = "";
if (len < 0) len = strlen(str);
int cap;
byte_queue_write_setmincap(queue, len);
char *dst = byte_queue_write_buf(queue, &cap);
if (dst) memcpy(dst, str, len);
byte_queue_write_ack(queue, len);
}
static void
byte_queue_write_fmt2(HTTP_ByteQueue *queue, const char *fmt, va_list args)
{
if (queue->flags & BYTE_QUEUE_ERROR)
return;
va_list args2;
va_copy(args2, args);
int cap;
byte_queue_write_setmincap(queue, 128);
char *dst = byte_queue_write_buf(queue, &cap);
int len = vsnprintf(dst, cap, fmt, args);
if (len < 0) {
queue->flags |= BYTE_QUEUE_ERROR;
va_end(args2);
va_end(args);
return;
}
if (len > cap) {
byte_queue_write_ack(queue, 0);
byte_queue_write_setmincap(queue, len+1);
dst = byte_queue_write_buf(queue, &cap);
vsnprintf(dst, cap, fmt, args2);
}
byte_queue_write_ack(queue, len);
va_end(args2);
va_end(args);
}
static void
byte_queue_write_fmt(HTTP_ByteQueue *queue, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
byte_queue_write_fmt2(queue, fmt, args);
va_end(args);
}
#define TEN_SPACES " "
void http_engine_init(HTTP_Engine *eng, int client, HTTP_MemoryFunc memfunc, void *memfuncdata)
{
if (client)
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_URL;
else
eng->state = HTTP_ENGINE_STATE_SERVER_RECV_BUF;
eng->closing = 0;
eng->numexch = 0;
byte_queue_init(&eng->input, 1<<20, memfunc, memfuncdata);
byte_queue_init(&eng->output, 1<<20, memfunc, memfuncdata);
}
void http_engine_free(HTTP_Engine *eng)
{
byte_queue_free(&eng->input);
byte_queue_free(&eng->output);
eng->state = HTTP_ENGINE_STATE_NONE;
}
void http_engine_close(HTTP_Engine *eng)
{
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT)
eng->state = HTTP_ENGINE_STATE_CLIENT_CLOSED;
else
eng->state = HTTP_ENGINE_STATE_SERVER_CLOSED;
}
HTTP_EngineState http_engine_state(HTTP_Engine *eng)
{
return eng->state;
}
const char* http_engine_statestr(HTTP_EngineState state) { // TODO: remove
switch (state) {
case HTTP_ENGINE_STATE_NONE: return "NONE";
case HTTP_ENGINE_STATE_CLIENT_PREP_URL: return "CLIENT_PREP_URL";
case HTTP_ENGINE_STATE_CLIENT_PREP_HEADER: return "CLIENT_PREP_HEADER";
case HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF: return "CLIENT_PREP_BODY_BUF";
case HTTP_ENGINE_STATE_CLIENT_PREP_BODY_ACK: return "CLIENT_PREP_BODY_ACK";
case HTTP_ENGINE_STATE_CLIENT_PREP_ERROR: return "CLIENT_PREP_ERROR";
case HTTP_ENGINE_STATE_CLIENT_SEND_BUF: return "CLIENT_SEND_BUF";
case HTTP_ENGINE_STATE_CLIENT_SEND_ACK: return "CLIENT_SEND_ACK";
case HTTP_ENGINE_STATE_CLIENT_RECV_BUF: return "CLIENT_RECV_BUF";
case HTTP_ENGINE_STATE_CLIENT_RECV_ACK: return "CLIENT_RECV_ACK";
case HTTP_ENGINE_STATE_CLIENT_READY: return "CLIENT_READY";
case HTTP_ENGINE_STATE_CLIENT_CLOSED: return "CLIENT_CLOSED";
case HTTP_ENGINE_STATE_SERVER_RECV_BUF: return "SERVER_RECV_BUF";
case HTTP_ENGINE_STATE_SERVER_RECV_ACK: return "SERVER_RECV_ACK";
case HTTP_ENGINE_STATE_SERVER_PREP_STATUS: return "SERVER_PREP_STATUS";
case HTTP_ENGINE_STATE_SERVER_PREP_HEADER: return "SERVER_PREP_HEADER";
case HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF: return "SERVER_PREP_BODY_BUF";
case HTTP_ENGINE_STATE_SERVER_PREP_BODY_ACK: return "SERVER_PREP_BODY_ACK";
case HTTP_ENGINE_STATE_SERVER_PREP_ERROR: return "SERVER_PREP_ERROR";
case HTTP_ENGINE_STATE_SERVER_SEND_BUF: return "SERVER_SEND_BUF";
case HTTP_ENGINE_STATE_SERVER_SEND_ACK: return "SERVER_SEND_ACK";
case HTTP_ENGINE_STATE_SERVER_CLOSED: return "SERVER_CLOSED";
default: return "UNKNOWN";
}
}
char *http_engine_recvbuf(HTTP_Engine *eng, int *cap)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_RECV_BUF) == 0) {
*cap = 0;
return NULL;
}
eng->state &= ~HTTP_ENGINE_STATEBIT_RECV_BUF;
eng->state |= HTTP_ENGINE_STATEBIT_RECV_ACK;
byte_queue_write_setmincap(&eng->input, 1<<9);
if (byte_queue_error(&eng->input)) {
*cap = 0;
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT)
eng->state = HTTP_ENGINE_STATE_CLIENT_CLOSED;
else
eng->state = HTTP_ENGINE_STATE_SERVER_CLOSED;
return NULL;
}
return byte_queue_write_buf(&eng->input, cap);
}
static int
should_keep_alive(HTTP_Engine *eng)
{
HTTP_ASSERT(eng->state & HTTP_ENGINE_STATEBIT_PREP);
#if 0
// If the parent system doesn't want us to reuse
// the connection, we certainly can't keep alive.
if ((eng->state & TINYHTTP_STREAM_REUSE) == 0)
return 0;
#endif
if (eng->numexch >= 100) // TODO: Make this a parameter
return 0;
HTTP_Request *req = &eng->result.req;
// If the client is using HTTP/1.0, we can't
// keep alive.
if (req->minor == 0)
return 0;
// TODO: This assumes "Connection" can only hold a single token,
// but this is not true.
int i = http_find_header(req->headers, req->num_headers, HTTP_STR("Connection"));
if (i >= 0 && http_streqcase(req->headers[i].value, HTTP_STR("Close")))
return 0;
return 1;
}
static void process_incoming_request(HTTP_Engine *eng)
{
HTTP_ASSERT(eng->state == HTTP_ENGINE_STATE_SERVER_RECV_ACK
|| eng->state == HTTP_ENGINE_STATE_SERVER_SEND_ACK
|| eng->state == HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF
|| eng->state == HTTP_ENGINE_STATE_SERVER_PREP_ERROR);
char *src;
int len;
src = byte_queue_read_buf(&eng->input, &len);
int ret = http_parse_request(src, len, &eng->result.req);
if (ret == 0) {
byte_queue_read_ack(&eng->input, 0);
eng->state = HTTP_ENGINE_STATE_SERVER_RECV_BUF;
return;
}
if (ret < 0) {
byte_queue_read_ack(&eng->input, 0);
byte_queue_write(&eng->output,
"HTTP/1.1 400 Bad Request\r\n"
"Connection: Close\r\n"
"Content-Length: 0\r\n"
"\r\n", -1
);
if (byte_queue_error(&eng->output))
eng->state = HTTP_ENGINE_STATE_SERVER_CLOSED;
else {
eng->closing = 1;
eng->state = HTTP_ENGINE_STATE_SERVER_SEND_BUF;
}
return;
}
HTTP_ASSERT(ret > 0);
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_STATUS;
eng->reqsize = ret;
eng->keepalive = should_keep_alive(eng);
eng->response_offset = byte_queue_offset(&eng->output);
}
void http_engine_recvack(HTTP_Engine *eng, int num)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_RECV_ACK) == 0)
return;
byte_queue_write_ack(&eng->input, num);
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT) {
char *src;
int len;
src = byte_queue_read_buf(&eng->input, &len);
int ret = http_parse_response(src, len, &eng->result.res);
if (ret == 0) {
byte_queue_read_ack(&eng->input, 0);
eng->state = HTTP_ENGINE_STATE_CLIENT_RECV_BUF;
return;
}
if (ret < 0) {
eng->state = HTTP_ENGINE_STATE_CLIENT_CLOSED;
return;
}
HTTP_ASSERT(ret > 0);
eng->state = HTTP_ENGINE_STATE_CLIENT_READY;
} else {
process_incoming_request(eng);
}
}
char *http_engine_sendbuf(HTTP_Engine *eng, int *len)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_SEND_BUF) == 0) {
*len = 0;
return NULL;
}
eng->state &= ~HTTP_ENGINE_STATEBIT_SEND_BUF;
eng->state |= HTTP_ENGINE_STATEBIT_SEND_ACK;
return byte_queue_read_buf(&eng->output, len);
}
void http_engine_sendack(HTTP_Engine *eng, int num)
{
if (eng->state != HTTP_ENGINE_STATE_SERVER_SEND_ACK &&
eng->state != HTTP_ENGINE_STATE_CLIENT_SEND_ACK)
return;
byte_queue_read_ack(&eng->output, num);
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT) {
if (byte_queue_empty(&eng->output))
eng->state = HTTP_ENGINE_STATE_CLIENT_RECV_BUF;
else
eng->state = HTTP_ENGINE_STATE_CLIENT_SEND_BUF;
} else {
if (byte_queue_empty(&eng->output)) {
if (!eng->closing && eng->keepalive)
process_incoming_request(eng);
else
eng->state = HTTP_ENGINE_STATE_SERVER_CLOSED;
} else
eng->state = HTTP_ENGINE_STATE_SERVER_SEND_BUF;
}
}
HTTP_Request *http_engine_getreq(HTTP_Engine *eng)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_REQUEST) == 0)
return NULL;
return &eng->result.req;
}
HTTP_Response *http_engine_getres(HTTP_Engine *eng)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_RESPONSE) == 0)
return NULL;
return &eng->result.res;
}
void http_engine_url(HTTP_Engine *eng, HTTP_Method method, HTTP_String url, int minor)
{
if (eng->state != HTTP_ENGINE_STATE_CLIENT_PREP_URL)
return;
eng->response_offset = byte_queue_offset(&eng->output); // TODO: rename response_offset to something that makes sense for clients
HTTP_URL parsed_url;
int ret = http_parse_url(url.ptr, url.len, &parsed_url);
if (ret != url.len) {
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_ERROR;
return;
}
HTTP_String method_and_space = HTTP_STR("???");
switch (method) {
case HTTP_METHOD_GET : method_and_space = HTTP_STR("GET "); break;
case HTTP_METHOD_HEAD : method_and_space = HTTP_STR("HEAD "); break;
case HTTP_METHOD_POST : method_and_space = HTTP_STR("POST "); break;
case HTTP_METHOD_PUT : method_and_space = HTTP_STR("PUT "); break;
case HTTP_METHOD_DELETE : method_and_space = HTTP_STR("DELETE "); break;
case HTTP_METHOD_CONNECT: method_and_space = HTTP_STR("CONNECT "); break;
case HTTP_METHOD_OPTIONS: method_and_space = HTTP_STR("OPTIONS "); break;
case HTTP_METHOD_TRACE : method_and_space = HTTP_STR("TRACE "); break;
case HTTP_METHOD_PATCH : method_and_space = HTTP_STR("PATCH "); break;
}
HTTP_String path = parsed_url.path;
if (path.len == 0)
path = HTTP_STR("/");
byte_queue_write(&eng->output, method_and_space.ptr, method_and_space.len);
byte_queue_write(&eng->output, path.ptr, path.len);
byte_queue_write(&eng->output, parsed_url.query.ptr, parsed_url.query.len);
byte_queue_write(&eng->output, minor ? " HTTP/1.1\r\nHost: " : " HTTP/1.0\r\nHost: ", -1);
byte_queue_write(&eng->output, parsed_url.authority.host.text.ptr, parsed_url.authority.host.text.len);
if (parsed_url.authority.port > 0)
byte_queue_write_fmt(&eng->output, "%d", parsed_url.authority.port);
byte_queue_write(&eng->output, "\r\n", 2);
eng->keepalive = 1; // TODO
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_HEADER;
}
static const char*
get_status_text(int code)
{
switch(code) {
case 100: return "Continue";
case 101: return "Switching Protocols";
case 102: return "Processing";
case 200: return "OK";
case 201: return "Created";
case 202: return "Accepted";
case 203: return "Non-Authoritative Information";
case 204: return "No Content";
case 205: return "Reset Content";
case 206: return "Partial Content";
case 207: return "Multi-Status";
case 208: return "Already Reported";
case 300: return "Multiple Choices";
case 301: return "Moved Permanently";
case 302: return "Found";
case 303: return "See Other";
case 304: return "Not Modified";
case 305: return "Use Proxy";
case 306: return "Switch Proxy";
case 307: return "Temporary Redirect";
case 308: return "Permanent Redirect";
case 400: return "Bad Request";
case 401: return "Unauthorized";
case 402: return "Payment Required";
case 403: return "Forbidden";
case 404: return "Not Found";
case 405: return "Method Not Allowed";
case 406: return "Not Acceptable";
case 407: return "Proxy Authentication Required";
case 408: return "Request Timeout";
case 409: return "Conflict";
case 410: return "Gone";
case 411: return "Length Required";
case 412: return "Precondition Failed";
case 413: return "Request Entity Too Large";
case 414: return "Request-URI Too Long";
case 415: return "Unsupported Media Type";
case 416: return "Requested Range Not Satisfiable";
case 417: return "Expectation Failed";
case 418: return "I'm a teapot";
case 420: return "Enhance your calm";
case 422: return "Unprocessable Entity";
case 426: return "Upgrade Required";
case 429: return "Too many requests";
case 431: return "Request Header Fields Too Large";
case 449: return "Retry With";
case 451: return "Unavailable For Legal Reasons";
case 500: return "Internal Server Error";
case 501: return "Not Implemented";
case 502: return "Bad Gateway";
case 503: return "Service Unavailable";
case 504: return "Gateway Timeout";
case 505: return "HTTP Version Not Supported";
case 509: return "Bandwidth Limit Exceeded";
}
return "???";
}
void http_engine_status(HTTP_Engine *eng, int status)
{
if (eng->state != HTTP_ENGINE_STATE_SERVER_PREP_STATUS)
return;
byte_queue_write_fmt(&eng->output,
"HTTP/1.1 %d %s\r\n",
status, get_status_text(status));
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_HEADER;
}
void http_engine_header(HTTP_Engine *eng, const char *src, int len)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_PREP_HEADER) == 0)
return;
if (len < 0) len = strlen(src);
// TODO: Check that the header is valid
byte_queue_write(&eng->output, src, len);
byte_queue_write(&eng->output, "\r\n", 2);
}
void http_engine_header_fmt2(HTTP_Engine *eng, const char *fmt, va_list args)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_PREP_HEADER) == 0)
return;
// TODO: Check that the header is valid
byte_queue_write_fmt2(&eng->output, fmt, args);
byte_queue_write(&eng->output, "\r\n", 2);
}
void http_engine_header_fmt(HTTP_Engine *eng, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
http_engine_header_fmt2(eng, fmt, args);
va_end(args);
}
static void
complete_message_head(HTTP_Engine *eng)
{
if (eng->keepalive) byte_queue_write(&eng->output, "Connection: Keep-Alive\r\n", -1);
else byte_queue_write(&eng->output, "Connection: Close\r\n", -1);
byte_queue_write(&eng->output, "Content-Length: ", -1);
eng->content_length_value_offset = byte_queue_offset(&eng->output);
byte_queue_write(&eng->output, TEN_SPACES "\r\n", -1);
byte_queue_write(&eng->output, "\r\n", -1);
eng->content_length_offset = byte_queue_offset(&eng->output);
}
static void complete_message_body(HTTP_Engine *eng)
{
unsigned int content_length = byte_queue_size_from_offset(&eng->output, eng->content_length_offset);
if (content_length > UINT32_MAX) {
// TODO
}
char tmp[10];
tmp[0] = '0' + content_length / 1000000000; content_length %= 1000000000;
tmp[1] = '0' + content_length / 100000000; content_length %= 100000000;
tmp[2] = '0' + content_length / 10000000; content_length %= 10000000;
tmp[3] = '0' + content_length / 1000000; content_length %= 1000000;
tmp[4] = '0' + content_length / 100000; content_length %= 100000;
tmp[5] = '0' + content_length / 10000; content_length %= 10000;
tmp[6] = '0' + content_length / 1000; content_length %= 1000;
tmp[7] = '0' + content_length / 100; content_length %= 100;
tmp[8] = '0' + content_length / 10; content_length %= 10;
tmp[9] = '0' + content_length;
int i = 0;
while (i < 9 && tmp[i] == '0')
i++;
byte_queue_patch(&eng->output, eng->content_length_value_offset, tmp + i, 10 - i);
}
void http_engine_body(HTTP_Engine *eng, void *src, int len)
{
if (len < 0) len = strlen(src);
http_engine_bodycap(eng, len);
int cap;
char *buf = http_engine_bodybuf(eng, &cap);
if (buf) {
memcpy(buf, src, len);
http_engine_bodyack(eng, len);
}
}
static void ensure_body_entered(HTTP_Engine *eng)
{
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT) {
if (eng->state == HTTP_ENGINE_STATE_CLIENT_PREP_HEADER) {
complete_message_head(eng);
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF;
}
} else {
if (eng->state == HTTP_ENGINE_STATE_SERVER_PREP_HEADER) {
complete_message_head(eng);
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF;
}
}
}
void http_engine_bodycap(HTTP_Engine *eng, int mincap)
{
ensure_body_entered(eng);
if (eng->state != HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF &&
eng->state != HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF)
return;
byte_queue_write_setmincap(&eng->output, mincap);
}
char *http_engine_bodybuf(HTTP_Engine *eng, int *cap)
{
ensure_body_entered(eng);
if (eng->state != HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF &&
eng->state != HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF) {
*cap = 0;
return NULL;
}
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT)
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_BODY_ACK;
else
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_BODY_ACK;
return byte_queue_write_buf(&eng->output, cap);
}
void http_engine_bodyack(HTTP_Engine *eng, int num)
{
if (eng->state != HTTP_ENGINE_STATE_CLIENT_PREP_BODY_ACK &&
eng->state != HTTP_ENGINE_STATE_SERVER_PREP_BODY_ACK)
return;
byte_queue_write_ack(&eng->output, num);
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT)
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF;
else
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF;
}
void http_engine_done(HTTP_Engine *eng)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_PREP) == 0)
return;
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT) {
if (eng->state == HTTP_ENGINE_STATE_CLIENT_PREP_URL) {
eng->state = HTTP_ENGINE_STATE_CLIENT_CLOSED;
return;
}
if (eng->state == HTTP_ENGINE_STATE_CLIENT_PREP_HEADER) {
complete_message_head(eng);
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF;
}
if (eng->state == HTTP_ENGINE_STATE_CLIENT_PREP_BODY_BUF)
complete_message_body(eng);
if (eng->state == HTTP_ENGINE_STATE_CLIENT_PREP_ERROR) {
eng->state = HTTP_ENGINE_STATE_CLIENT_CLOSED;
return;
}
if (byte_queue_error(&eng->output)) {
eng->state = HTTP_ENGINE_STATE_CLIENT_CLOSED;
return;
}
eng->state = HTTP_ENGINE_STATE_CLIENT_SEND_BUF;
} else {
if (eng->state == HTTP_ENGINE_STATE_SERVER_PREP_HEADER) {
complete_message_head(eng);
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF;
}
if (eng->state == HTTP_ENGINE_STATE_SERVER_PREP_BODY_BUF)
complete_message_body(eng);
if (eng->state == HTTP_ENGINE_STATE_SERVER_PREP_ERROR) {
byte_queue_remove_from_offset(&eng->output, eng->response_offset);
byte_queue_write(&eng->output,
"HTTP/1.1 500 Internal Server Error\r\n"
"Content-Length: 0\r\n"
"Connection: Close\r\n"
"\r\n",
-1
);
}
if (byte_queue_error(&eng->output)) {
eng->state = HTTP_ENGINE_STATE_SERVER_CLOSED;
return;
}
byte_queue_read_ack(&eng->input, eng->reqsize);
eng->state = HTTP_ENGINE_STATE_SERVER_SEND_BUF;
}
}
void http_engine_undo(HTTP_Engine *eng)
{
if ((eng->state & HTTP_ENGINE_STATEBIT_PREP) == 0)
return;
byte_queue_write_ack(&eng->output, 0);
byte_queue_remove_from_offset(&eng->output, eng->response_offset);
if (eng->state & HTTP_ENGINE_STATEBIT_CLIENT)
eng->state = HTTP_ENGINE_STATE_CLIENT_PREP_URL;
else
eng->state = HTTP_ENGINE_STATE_SERVER_PREP_STATUS;
}//////////////////////////////////////////////////////////////////////
// src/socket.c
//////////////////////////////////////////////////////////////////////
void socket_global_init(void)
{
SSL_library_init();
SSL_load_error_strings();
OpenSSL_add_all_algorithms();
}
void socket_global_free(void)
{
EVP_cleanup();
ERR_free_strings();
}
int socket_group_init(SocketGroup *group)
{
SSL_CTX *ssl_ctx = SSL_CTX_new(TLS_client_method());
if (!ssl_ctx) {
fprintf(stderr, "Unable to create SSL context\n");
ERR_print_errors_fp(stderr);
return -1;
}
// Set minimum TLS version (optional - for better security)
SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_2_VERSION);
// Set certificate verification mode
SSL_CTX_set_verify(ssl_ctx, SSL_VERIFY_PEER, NULL);
// Load default trusted certificate store
if (SSL_CTX_set_default_verify_paths(ssl_ctx) != 1) {
fprintf(stderr, "Failed to set default verify paths\n");
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
group->ssl_ctx = ssl_ctx;
group->domains = NULL;
group->num_domains = 0;
group->max_domains = 0;
return 0;
}
static int servername_callback(SSL *ssl, int *ad, void *arg)
{
SocketGroup *group = arg;
const char *servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (servername == NULL)
return SSL_TLSEXT_ERR_NOACK;
for (int i = 0; i < group->num_domains; i++) {
Domain *domain = &group->domains[i];
if (!strcmp(domain->name, servername)) {
SSL_set_SSL_CTX(ssl, domain->ssl_ctx);
return SSL_TLSEXT_ERR_OK;
}
}
return SSL_TLSEXT_ERR_NOACK;
}
int socket_group_init_server(SocketGroup *group, HTTP_String cert_file, HTTP_String key_file)
{
SSL_CTX *ssl_ctx = SSL_CTX_new(TLS_server_method());
if (!ssl_ctx) {
fprintf(stderr, "Unable to create server SSL context\n");
ERR_print_errors_fp(stderr);
return -1;
}
// Set minimum TLS version (optional - for better security)
SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_2_VERSION);
// Copy certificate file path to static buffer
static char cert_buffer[1024];
if (cert_file.len >= (int) sizeof(cert_buffer)) {
fprintf(stderr, "Certificate file path too long\n");
SSL_CTX_free(ssl_ctx);
return -1;
}
memcpy(cert_buffer, cert_file.ptr, cert_file.len);
cert_buffer[cert_file.len] = '\0';
// Copy private key file path to static buffer
static char key_buffer[1024];
if (key_file.len >= (int) sizeof(key_buffer)) {
fprintf(stderr, "Private key file path too long\n");
SSL_CTX_free(ssl_ctx);
return -1;
}
memcpy(key_buffer, key_file.ptr, key_file.len);
key_buffer[key_file.len] = '\0';
// Load certificate and private key
if (SSL_CTX_use_certificate_file(ssl_ctx, cert_buffer, SSL_FILETYPE_PEM) != 1) {
fprintf(stderr, "Failed to load certificate file: %s\n", cert_buffer);
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
if (SSL_CTX_use_PrivateKey_file(ssl_ctx, key_buffer, SSL_FILETYPE_PEM) != 1) {
fprintf(stderr, "Failed to load private key file: %s\n", key_buffer);
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
// Verify that the private key matches the certificate
if (SSL_CTX_check_private_key(ssl_ctx) != 1) {
fprintf(stderr, "Private key does not match certificate\n");
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
SSL_CTX_set_tlsext_servername_callback(group->ssl_ctx, servername_callback);
SSL_CTX_set_tlsext_servername_arg(group->ssl_ctx, group);
group->ssl_ctx = ssl_ctx;
group->domains = NULL;
group->num_domains = 0;
group->max_domains = 0;
return 0;
}
void socket_group_free(SocketGroup *group)
{
SSL_CTX_free(group->ssl_ctx);
}
int socket_group_add_domain(SocketGroup *group, HTTP_String domain, HTTP_String cert_file, HTTP_String key_file)
{
if (group->num_domains == group->max_domains) {
int new_max_domains = 2 * group->max_domains;
if (new_max_domains == 0)
new_max_domains = 4;
Domain *new_domains = malloc(new_max_domains * sizeof(Domain));
if (new_domains == NULL)
return -1;
if (group->max_domains > 0) {
for (int i = 0; i < group->num_domains; i++)
new_domains[i] = group->domains[i];
free(group->domains);
}
group->domains = new_domains;
group->max_domains = new_max_domains;
}
SSL_CTX *ssl_ctx = SSL_CTX_new(TLS_server_method());
if (!ssl_ctx) {
fprintf(stderr, "Unable to create server SSL context\n");
ERR_print_errors_fp(stderr);
return -1;
}
// Set minimum TLS version (optional - for better security)
SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_2_VERSION);
// Copy certificate file path to static buffer
static char cert_buffer[1024];
if (cert_file.len >= (int) sizeof(cert_buffer)) {
fprintf(stderr, "Certificate file path too long\n");
SSL_CTX_free(ssl_ctx);
return -1;
}
memcpy(cert_buffer, cert_file.ptr, cert_file.len);
cert_buffer[cert_file.len] = '\0';
// Copy private key file path to static buffer
static char key_buffer[1024];
if (key_file.len >= (int) sizeof(key_buffer)) {
fprintf(stderr, "Private key file path too long\n");
SSL_CTX_free(ssl_ctx);
return -1;
}
memcpy(key_buffer, key_file.ptr, key_file.len);
key_buffer[key_file.len] = '\0';
// Load certificate and private key
if (SSL_CTX_use_certificate_file(ssl_ctx, cert_buffer, SSL_FILETYPE_PEM) != 1) {
fprintf(stderr, "Failed to load certificate file: %s\n", cert_buffer);
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
if (SSL_CTX_use_PrivateKey_file(ssl_ctx, key_buffer, SSL_FILETYPE_PEM) != 1) {
fprintf(stderr, "Failed to load private key file: %s\n", key_buffer);
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
// Verify that the private key matches the certificate
if (SSL_CTX_check_private_key(ssl_ctx) != 1) {
fprintf(stderr, "Private key does not match certificate\n");
ERR_print_errors_fp(stderr);
SSL_CTX_free(ssl_ctx);
return -1;
}
Domain *domain_info = &group->domains[group->num_domains];
if (domain.len >= (int) sizeof(domain_info->name)) {
SSL_CTX_free(ssl_ctx);
return -1;
}
memcpy(domain_info->name, domain.ptr, domain.len);
domain_info->name[domain.len] = '\0';
domain_info->ssl_ctx = ssl_ctx;
group->num_domains++;
return 0;
}
SocketState socket_state(Socket *sock)
{
return sock->state;
}
void socket_accept(Socket *sock, SocketGroup *group, int fd)
{
// Initialize socket for server-side TLS handshake
sock->state = SOCKET_STATE_ACCEPTED; // TCP connection already established
sock->event = SOCKET_WANT_NONE;
sock->fd = fd;
sock->ssl = NULL;
sock->ssl_ctx = group ? group->ssl_ctx : NULL;
sock->addr_list = NULL;
sock->addr_count = 0;
sock->addr_cursor = 0;
sock->hostname = NULL;
sock->port = 0;
// Set non-blocking mode for the accepted socket
int flags = fcntl(fd, F_GETFL, 0);
if (flags >= 0) {
fcntl(fd, F_SETFL, flags | O_NONBLOCK);
}
// Start the TLS handshake process
socket_update(sock);
}
void socket_connect(Socket *sock, SocketGroup *group, HTTP_String host, uint16_t port) {
sock->state = SOCKET_STATE_PENDING;
sock->event = SOCKET_WANT_NONE;
sock->fd = -1;
sock->ssl = NULL;
sock->ssl_ctx = group ? group->ssl_ctx : NULL;
sock->addr_list = NULL;
sock->addr_count = 0;
sock->addr_cursor = 0;
sock->port = port;
sock->hostname = (char*)malloc(host.len + 1);
memcpy(sock->hostname, host.ptr, host.len);
sock->hostname[host.len] = '\0';
// DNS query
struct addrinfo hints = {0}, *res = NULL, *rp = NULL;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
char portstr[16];
snprintf(portstr, sizeof(portstr), "%u", port);
if (getaddrinfo(sock->hostname, portstr, &hints, &res) != 0) {
sock->state = SOCKET_STATE_DIED;
return;
}
// Count addresses
int count = 0;
for (rp = res; rp; rp = rp->ai_next) {
if (rp->ai_family == AF_INET || rp->ai_family == AF_INET6) count++;
}
if (count == 0) {
freeaddrinfo(res);
sock->state = SOCKET_STATE_DIED;
return;
}
sock->addr_list = (AddrInfo*)malloc(sizeof(AddrInfo) * count);
sock->addr_count = count;
sock->addr_cursor = 0;
int i = 0;
for (rp = res; rp; rp = rp->ai_next) {
if (rp->ai_family == AF_INET) {
sock->addr_list[i].is_ipv6 = 0;
memcpy(&sock->addr_list[i].addr.ipv4, &((struct sockaddr_in*)rp->ai_addr)->sin_addr, sizeof(HTTP_IPv4));
i++;
} else if (rp->ai_family == AF_INET6) {
sock->addr_list[i].is_ipv6 = 1;
memcpy(&sock->addr_list[i].addr.ipv6, &((struct sockaddr_in6*)rp->ai_addr)->sin6_addr, sizeof(HTTP_IPv6));
i++;
}
}
freeaddrinfo(res);
// Set event/state and call update
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
socket_update(sock);
}
void socket_connect_ipv4(Socket *sock, SocketGroup *group, HTTP_IPv4 addr, uint16_t port) {
sock->state = SOCKET_STATE_PENDING;
sock->event = SOCKET_WANT_NONE;
sock->fd = -1;
sock->ssl = NULL;
sock->ssl_ctx = group ? group->ssl_ctx : NULL;
sock->addr_list = NULL;
sock->addr_count = 0;
sock->addr_cursor = 0;
sock->hostname = NULL;
sock->port = port;
sock->addr_list = (AddrInfo*)malloc(sizeof(AddrInfo));
sock->addr_list[0].is_ipv6 = 0;
memcpy(&sock->addr_list[0].addr.ipv4, &addr, sizeof(HTTP_IPv4));
sock->addr_count = 1;
sock->addr_cursor = 0;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
socket_update(sock);
}
void socket_connect_ipv6(Socket *sock, SocketGroup *group, HTTP_IPv6 addr, uint16_t port) {
sock->state = SOCKET_STATE_PENDING;
sock->event = SOCKET_WANT_NONE;
sock->fd = -1;
sock->ssl = NULL;
sock->ssl_ctx = group ? group->ssl_ctx : NULL;
sock->addr_list = NULL;
sock->addr_count = 0;
sock->addr_cursor = 0;
sock->hostname = NULL;
sock->port = port;
sock->addr_list = (AddrInfo*)malloc(sizeof(AddrInfo));
sock->addr_list[0].is_ipv6 = 1;
memcpy(&sock->addr_list[0].addr.ipv6, &addr, sizeof(HTTP_IPv6));
sock->addr_count = 1;
sock->addr_cursor = 0;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
socket_update(sock);
}
void socket_update(Socket *sock)
{
sock->event = SOCKET_WANT_NONE;
bool again;
do {
again = false;
switch (sock->state) {
case SOCKET_STATE_PENDING:
{
if (sock->ssl) {
SSL_free(sock->ssl);
sock->ssl = NULL;
}
if (sock->fd != -1)
close(sock->fd);
// If cursor reached the end, die
if (sock->addr_cursor >= sock->addr_count) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
break;
}
// Take current address
AddrInfo *ai = &sock->addr_list[sock->addr_cursor];
int family = ai->is_ipv6 ? AF_INET6 : AF_INET;
int fd = socket(family, SOCK_STREAM, 0);
if (fd < 0) {
// Try next address
sock->addr_cursor++;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
again = true;
break;
}
// Set non-blocking
int flags = fcntl(fd, F_GETFL, 0);
if (flags >= 0) fcntl(fd, F_SETFL, flags | O_NONBLOCK); // TODO: Handle error by setting the socket to DIED
// Prepare sockaddr
int ret;
if (ai->is_ipv6) {
struct sockaddr_in6 sa6 = {0};
sa6.sin6_family = AF_INET6;
memcpy(&sa6.sin6_addr, &ai->addr.ipv6, sizeof(HTTP_IPv6));
sa6.sin6_port = htons(sock->port);
ret = connect(fd, (struct sockaddr*)&sa6, sizeof(sa6));
} else {
struct sockaddr_in sa4 = {0};
sa4.sin_family = AF_INET;
memcpy(&sa4.sin_addr, &ai->addr.ipv4, sizeof(HTTP_IPv4));
sa4.sin_port = htons(sock->port);
ret = connect(fd, (struct sockaddr*)&sa4, sizeof(sa4));
}
if (ret == 0) {
// Connected immediately
sock->fd = fd;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_CONNECTED;
again = true;
break;
}
if (ret < 0 && errno == EINPROGRESS) {
// Connection pending
sock->fd = fd;
sock->event = SOCKET_WANT_WRITE;
sock->state = SOCKET_STATE_CONNECTING;
break;
}
// Connect failed
// If remote peer not working, try next address
if (errno == ECONNREFUSED || errno == ETIMEDOUT || errno == ENETUNREACH || errno == EHOSTUNREACH) {
sock->addr_cursor++;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
again = true;
} else {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
}
break;
case SOCKET_STATE_CONNECTING:
{
// Check connect result
int err = 0;
socklen_t len = sizeof(err);
if (getsockopt(sock->fd, SOL_SOCKET, SO_ERROR, &err, &len) < 0 || err != 0) {
close(sock->fd);
// If remote peer not working, try next address
if (err == ECONNREFUSED || err == ETIMEDOUT || err == ENETUNREACH || err == EHOSTUNREACH) {
sock->addr_cursor++;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
again = true;
} else {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
break;
}
// Connect succeeded
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_CONNECTED;
again = true;
break;
}
break;
case SOCKET_STATE_CONNECTED:
{
if (sock->ssl_ctx == NULL) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_ESTABLISHED_READY;
} else {
// Start SSL handshake
if (!sock->ssl) {
sock->ssl = SSL_new(sock->ssl_ctx);
SSL_set_fd(sock->ssl, sock->fd); // TODO: handle error?
if (sock->hostname) SSL_set_tlsext_host_name(sock->ssl, sock->hostname);
}
int ret = SSL_connect(sock->ssl);
if (ret == 1) {
// Handshake done
free(sock->addr_list); sock->addr_list = NULL;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_ESTABLISHED_READY;
break;
}
int err = SSL_get_error(sock->ssl, ret);
if (err == SSL_ERROR_WANT_READ) {
sock->event = SOCKET_WANT_READ;
break;
}
if (err == SSL_ERROR_WANT_WRITE) {
sock->event = SOCKET_WANT_WRITE;
break;
}
sock->addr_cursor++;
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_PENDING;
again = true;
}
}
break;
case SOCKET_STATE_ACCEPTED:
{
if (sock->ssl_ctx == NULL) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_ESTABLISHED_READY;
} else {
// Start server-side SSL handshake
if (!sock->ssl) {
sock->ssl = SSL_new(sock->ssl_ctx);
SSL_set_fd(sock->ssl, sock->fd); // TODO: handle error?
}
int ret = SSL_accept(sock->ssl);
if (ret == 1) {
// Handshake done
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_ESTABLISHED_READY;
break;
}
int err = SSL_get_error(sock->ssl, ret);
if (err == SSL_ERROR_WANT_READ) {
sock->event = SOCKET_WANT_READ;
break;
}
if (err == SSL_ERROR_WANT_WRITE) {
sock->event = SOCKET_WANT_WRITE;
break;
}
// Server socket error - close the connection
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
}
break;
case SOCKET_STATE_ESTABLISHED_WAIT:
{
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_ESTABLISHED_READY;
}
break;
case SOCKET_STATE_SHUTDOWN:
{
if (sock->ssl_ctx == NULL) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
} else {
int ret = SSL_shutdown(sock->ssl);
if (ret == 1) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
break;
}
int err = SSL_get_error(sock->ssl, ret);
if (err == SSL_ERROR_WANT_READ) {
sock->event = SOCKET_WANT_READ;
break;
}
if (err == SSL_ERROR_WANT_WRITE) {
sock->event = SOCKET_WANT_WRITE;
break;
}
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
}
break;
default:
// Do nothing
break;
}
} while (again);
}
int socket_read(Socket *sock, char *dst, int max) {
// If not ESTABLISHED, set state to DIED and return
if (sock->state != SOCKET_STATE_ESTABLISHED_READY) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
return -1;
}
if (sock->ssl_ctx == NULL) {
int ret = read(sock->fd, dst, max);
if (ret == 0) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
} else {
if (ret < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
sock->event = SOCKET_WANT_READ;
sock->state = SOCKET_STATE_ESTABLISHED_WAIT;
} else {
if (errno != EINTR) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
}
ret = 0;
}
}
return ret;
} else {
int ret = SSL_read(sock->ssl, dst, max);
if (ret <= 0) {
int err = SSL_get_error(sock->ssl, ret);
if (err == SSL_ERROR_WANT_READ) {
sock->event = SOCKET_WANT_READ;
sock->state = SOCKET_STATE_ESTABLISHED_WAIT;
} else if (err == SSL_ERROR_WANT_WRITE) {
sock->event = SOCKET_WANT_WRITE;
sock->state = SOCKET_STATE_ESTABLISHED_WAIT;
} else {
fprintf(stderr, "OpenSSL error in socket_read: ");
ERR_print_errors_fp(stderr);
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
ret = 0;
}
return ret;
}
}
int socket_write(Socket *sock, char *src, int len) {
// If not ESTABLISHED, set state to DIED and return
if (sock->state != SOCKET_STATE_ESTABLISHED_READY) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
return 0;
}
if (sock->ssl_ctx == NULL) {
int ret = write(sock->fd, src, len);
if (ret < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
sock->event = SOCKET_WANT_WRITE;
sock->state = SOCKET_STATE_ESTABLISHED_WAIT;
} else {
if (errno != EINTR) {
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
}
ret = 0;
}
return ret;
} else {
int ret = SSL_write(sock->ssl, src, len);
if (ret <= 0) {
int err = SSL_get_error(sock->ssl, ret);
if (err == SSL_ERROR_WANT_READ) {
sock->event = SOCKET_WANT_READ;
sock->state = SOCKET_STATE_ESTABLISHED_WAIT;
} else if (err == SSL_ERROR_WANT_WRITE) {
sock->event = SOCKET_WANT_WRITE;
sock->state = SOCKET_STATE_ESTABLISHED_WAIT;
} else {
fprintf(stderr, "OpenSSL error in socket_write: ");
ERR_print_errors_fp(stderr);
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_DIED;
}
ret = 0;
}
return ret;
}
}
void socket_close(Socket *sock) {
// Set state to SHUTDOWN and call update
sock->event = SOCKET_WANT_NONE;
sock->state = SOCKET_STATE_SHUTDOWN;
socket_update(sock);
}
void socket_free(Socket *sock) {
// Release all resources associated to the socket
if (sock->ssl) {
SSL_free(sock->ssl);
sock->ssl = NULL;
}
if (sock->fd >= 0) {
close(sock->fd);
sock->fd = -1;
}
if (sock->hostname) {
free(sock->hostname);
sock->hostname = NULL;
}
if (sock->addr_list) {
free(sock->addr_list);
sock->addr_list = NULL;
}
}
#define COUNT(X) (sizeof(X) / sizeof((X)[0]))
int socket_wait(Socket **socks, int num_socks)
{
if (num_socks <= 0)
return -1;
struct pollfd polled[100]; // TODO: make this value configurable
if (num_socks > (int) COUNT(polled))
return -1;
for (;;) {
for (int i = 0; i < num_socks; i++) {
int events = 0;
switch (socks[i]->event) {
case SOCKET_WANT_READ : events = POLLIN; break;
case SOCKET_WANT_WRITE: events = POLLOUT; break;
case SOCKET_WANT_NONE : return i;
default: HTTP_ASSERT(0); break;
}
polled[i].fd = socks[i]->fd;
polled[i].events = events;
polled[i].revents = 0;
}
int ret = poll(polled, num_socks, -1);
if (ret < 0)
return -1;
// Update socket states based on poll results
for (int i = 0; i < num_socks; i++) {
if (polled[i].revents & (POLLERR | POLLHUP | POLLNVAL)) {
socks[i]->event = SOCKET_WANT_NONE;
socks[i]->state = SOCKET_STATE_DIED;
return i;
}
if (polled[i].revents & (POLLIN | POLLOUT)) {
socks[i]->event = SOCKET_WANT_NONE;
socket_update(socks[i]);
}
}
}
return -1;
}//////////////////////////////////////////////////////////////////////
// src/client.c
//////////////////////////////////////////////////////////////////////
// TODO
#define ERROR printf("error at %s:%d\n", __FILE__, __LINE__);
#define CLIENT_MAX_CONNS 256
typedef enum {
CLIENT_CONNECTION_FREE,
CLIENT_CONNECTION_INIT,
CLIENT_CONNECTION_WAIT,
CLIENT_CONNECTION_DONE,
} ClientConnectionState;
typedef struct {
ClientConnectionState state;
uint16_t gen;
Socket socket;
HTTP_Engine engine;
bool trace;
} ClientConnection;
struct HTTP_Client {
SocketGroup group;
int num_conns;
ClientConnection conns[CLIENT_MAX_CONNS];
int ready_head;
int ready_count;
int ready[CLIENT_MAX_CONNS];
};
// Rename the memory function
static void* client_memfunc(HTTP_MemoryFuncTag tag, void *ptr, int len, void *data) {
(void)data;
switch (tag) {
case HTTP_MEMFUNC_MALLOC:
return malloc(len);
case HTTP_MEMFUNC_FREE:
free(ptr);
return NULL;
}
return NULL;
}
void http_global_init(void)
{
socket_global_init();
}
void http_global_free(void)
{
socket_global_free();
}
HTTP_Client *http_client_init(void)
{
HTTP_Client *client = malloc(sizeof(HTTP_Client));
if (client == NULL)
return NULL;
if (socket_group_init(&client->group) < 0) {
free(client);
return NULL;
}
for (int i = 0; i < CLIENT_MAX_CONNS; i++) {
client->conns[i].state = CLIENT_CONNECTION_FREE;
client->conns[i].gen = 1;
}
client->num_conns = 0;
client->ready_head = 0;
client->ready_count = 0;
return client;
}
void http_client_free(HTTP_Client *client)
{
for (int i = 0, j = 0; j < client->num_conns; i++) {
if (client->conns[i].state == CLIENT_CONNECTION_FREE)
continue;
j++;
// TODO
}
socket_group_free(&client->group);
free(client);
}
int http_client_request(HTTP_Client *client, HTTP_RequestHandle *handle)
{
if (client->num_conns == CLIENT_MAX_CONNS)
return -1;
int i = 0;
while (client->conns[i].state != CLIENT_CONNECTION_FREE)
i++;
client->conns[i].trace = false;
client->conns[i].state = CLIENT_CONNECTION_INIT;
http_engine_init(&client->conns[i].engine, 1, client_memfunc, NULL);
client->num_conns++;
*handle = (HTTP_RequestHandle) { client, i, client->conns[i].gen };
return 0;
}
static void client_connection_update(ClientConnection *conn)
{
HTTP_ASSERT(conn->state == CLIENT_CONNECTION_WAIT);
socket_update(&conn->socket);
while (socket_state(&conn->socket) == SOCKET_STATE_ESTABLISHED_READY) {
HTTP_EngineState engine_state;
engine_state = http_engine_state(&conn->engine);
if (engine_state == HTTP_ENGINE_STATE_CLIENT_RECV_BUF) {
int len;
char *buf;
buf = http_engine_recvbuf(&conn->engine, &len);
if (buf) {
int ret = socket_read(&conn->socket, buf, len);
if (conn->trace)
print_bytes(HTTP_STR(">> "), (HTTP_String) { buf, ret });
http_engine_recvack(&conn->engine, ret);
}
} else if (engine_state == HTTP_ENGINE_STATE_CLIENT_SEND_BUF) {
int len;
char *buf;
buf = http_engine_sendbuf(&conn->engine, &len);
if (buf) {
int ret = socket_write(&conn->socket, buf, len);
if (conn->trace)
print_bytes(HTTP_STR("<< "), (HTTP_String) { buf, ret });
http_engine_sendack(&conn->engine, ret);
}
}
engine_state = http_engine_state(&conn->engine);
if (engine_state == HTTP_ENGINE_STATE_CLIENT_CLOSED ||
engine_state == HTTP_ENGINE_STATE_CLIENT_READY)
socket_close(&conn->socket);
}
if (socket_state(&conn->socket) == SOCKET_STATE_DIED)
conn->state = CLIENT_CONNECTION_DONE;
}
int http_client_wait(HTTP_Client *client, HTTP_RequestHandle *handle)
{
while (client->ready_count == 0) {
int num_polled = 0;
int indices[CLIENT_MAX_CONNS];
struct pollfd polled[CLIENT_MAX_CONNS];
for (int i = 0, j = 0; j < client->num_conns; i++) {
HTTP_ASSERT(i < CLIENT_MAX_CONNS);
ClientConnection *conn = &client->conns[i];
if (conn->state == CLIENT_CONNECTION_FREE)
continue;
j++;
int events = 0;
if (conn->state == CLIENT_CONNECTION_WAIT) {
switch (conn->socket.event) {
case SOCKET_WANT_READ : events = POLLIN; break;
case SOCKET_WANT_WRITE: events = POLLOUT; break;
case SOCKET_WANT_NONE : events = 0; break;
}
}
if (events) {
indices[num_polled] = i;
polled[num_polled].fd = conn->socket.fd;
polled[num_polled].events = events;
polled[num_polled].revents = 0;
num_polled++;
}
}
if (num_polled == 0)
return -1;
poll(polled, num_polled, -1);
for (int i = 0; i < num_polled; i++) {
int connidx = indices[i];
ClientConnection *conn = &client->conns[connidx];
if (conn->state != CLIENT_CONNECTION_WAIT)
continue;
if (polled[i].revents == 0)
continue;
// TODO: handle error revents
client_connection_update(conn);
if (conn->state == CLIENT_CONNECTION_DONE) {
int tail = (client->ready_head + client->ready_count) % CLIENT_MAX_CONNS;
client->ready[tail] = connidx;
client->ready_count++;
}
}
}
int index = client->ready[client->ready_head];
client->ready_head = (client->ready_head + 1) % CLIENT_MAX_CONNS;
client->ready_count--;
*handle = (HTTP_RequestHandle) { client, index, client->conns[index].gen };
return 0;
}
static ClientConnection *handle2clientconn(HTTP_RequestHandle handle)
{
if (handle.data0 == NULL)
return NULL;
HTTP_Client *client = handle.data0;
if (handle.data1 >= CLIENT_MAX_CONNS)
return NULL;
ClientConnection *conn = &client->conns[handle.data1];
if (handle.data2 != conn->gen)
return NULL;
return conn;
}
void http_request_trace(HTTP_RequestHandle handle, bool trace)
{
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return;
if (conn->state != CLIENT_CONNECTION_INIT)
return;
conn->trace = trace;
}
void http_request_line(HTTP_RequestHandle handle, HTTP_Method method, HTTP_String url)
{
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return;
if (conn->state != CLIENT_CONNECTION_INIT)
return;
HTTP_Client *client = handle.data0;
HTTP_URL parsed_url;
int ret = http_parse_url(url.ptr, url.len, &parsed_url);
if (ret != url.len) {
// TODO
ERROR;
return;
}
bool secure = false;
if (http_streq(parsed_url.scheme, HTTP_STR("https"))) {
secure = true;
} else if (!http_streq(parsed_url.scheme, HTTP_STR("http"))) {
// TODO
ERROR;
return;
}
int port = parsed_url.authority.port;
if (port == 0) {
if (secure)
port = 443;
else
port = 80;
}
SocketGroup *group = secure ? &client->group : NULL;
switch (parsed_url.authority.host.mode) {
case HTTP_HOST_MODE_IPV4: socket_connect_ipv4(&conn->socket, group, parsed_url.authority.host.ipv4, port); break;
case HTTP_HOST_MODE_IPV6: socket_connect_ipv6(&conn->socket, group, parsed_url.authority.host.ipv6, port); break;
case HTTP_HOST_MODE_NAME: socket_connect (&conn->socket, group, parsed_url.authority.host.name, port); break;
case HTTP_HOST_MODE_VOID:
// TODO
ERROR;
return;
}
http_engine_url(&conn->engine, method, url, 1);
}
void http_request_header(HTTP_RequestHandle handle, char *header, int len)
{
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return;
if (conn->state != CLIENT_CONNECTION_INIT)
return;
http_engine_header(&conn->engine, header, len);
}
void http_request_body(HTTP_RequestHandle handle, char *body, int len)
{
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return;
if (conn->state != CLIENT_CONNECTION_INIT)
return;
http_engine_body(&conn->engine, body, len);
}
void http_request_submit(HTTP_RequestHandle handle)
{
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return;
if (conn->state != CLIENT_CONNECTION_INIT)
return;
http_engine_done(&conn->engine);
conn->state = CLIENT_CONNECTION_WAIT;
}
HTTP_Response *http_request_result(HTTP_RequestHandle handle)
{
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return NULL;
if (conn->state != CLIENT_CONNECTION_DONE)
return NULL;
HTTP_EngineState engine_state = http_engine_state(&conn->engine);
if (engine_state != HTTP_ENGINE_STATE_CLIENT_READY)
return NULL;
return http_engine_getres(&conn->engine);
}
void http_request_free(HTTP_RequestHandle handle)
{
HTTP_Client *client = handle.data0;
ClientConnection *conn = handle2clientconn(handle);
if (conn == NULL)
return;
if (conn->state != CLIENT_CONNECTION_DONE)
return;
http_engine_free(&conn->engine);
socket_free(&conn->socket);
conn->state = CLIENT_CONNECTION_FREE;
client->num_conns--;
}//////////////////////////////////////////////////////////////////////
// src/server.c
//////////////////////////////////////////////////////////////////////
#define MAX_CONNS (1<<10)
typedef struct {
bool used;
uint16_t gen;
Socket socket;
HTTP_Engine engine;
} Connection;
struct HTTP_Server {
SocketGroup group;
int listen_fd;
int secure_fd;
int num_conns;
Connection conns[MAX_CONNS];
int ready_head;
int ready_count;
int ready[MAX_CONNS];
};
static int listen_socket(HTTP_String addr, uint16_t port, bool reuse_addr, int backlog)
{
int listen_fd = socket(AF_INET, SOCK_STREAM, 0);
if (listen_fd < 0)
return -1;
{
int flags = fcntl(listen_fd, F_GETFL, 0);
if (flags < 0) {
close(listen_fd);
return -1;
}
if (fcntl(listen_fd, F_SETFL, flags | O_NONBLOCK) < 0) {
close(listen_fd);
return -1;
}
}
if (reuse_addr) {
int one = 1;
setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
}
struct in_addr addr_buf;
if (addr.len == 0)
addr_buf.s_addr = htonl(INADDR_ANY);
else {
_Static_assert(sizeof(struct in_addr) == sizeof(HTTP_IPv4));
if (http_parse_ipv4(addr.ptr, addr.len, (HTTP_IPv4*) &addr_buf) < 0) {
close(listen_fd);
return -1;
}
}
struct sockaddr_in bind_buf;
bind_buf.sin_family = AF_INET;
bind_buf.sin_addr = addr_buf;
bind_buf.sin_port = htons(port);
if (bind(listen_fd, (struct sockaddr*) &bind_buf, sizeof(bind_buf)) < 0) {
close(listen_fd);
return -1;
}
if (listen(listen_fd, backlog) < 0) {
close(listen_fd);
return -1;
}
return listen_fd;
}
HTTP_Server *http_server_init(HTTP_String addr, uint16_t port)
{
return http_server_init_ex(addr, port, 0, HTTP_STR(""), HTTP_STR(""));
}
HTTP_Server *http_server_init_ex(HTTP_String addr, uint16_t port,
uint16_t secure_port, HTTP_String cert_key, HTTP_String private_key)
{
HTTP_Server *server = malloc(sizeof(HTTP_Server));
if (server == NULL)
return NULL;
int backlog = 32;
bool reuse_addr = true;
if (port == 0 && secure_port == 0) {
// You must have at least one!
free(server);
return NULL;
}
if (port == 0)
server->listen_fd = -1;
else {
server->listen_fd = listen_socket(addr, port, reuse_addr, backlog);
if (server->listen_fd < 0) {
free(server);
return NULL;
}
}
if (secure_port == 0)
server->secure_fd = -1;
else {
if (socket_group_init_server(&server->group, cert_key, private_key) < 0) {
close(server->listen_fd);
free(server);
return NULL;
}
server->secure_fd = listen_socket(addr, secure_port, reuse_addr, backlog);
if (server->secure_fd < 0) {
socket_group_free(&server->group);
close(server->listen_fd);
free(server);
return NULL;
}
}
server->num_websites = 0;
server->num_conns = 0;
server->ready_head = 0;
server->ready_count = 0;
for (int i = 0; i < MAX_CONNS; i++) {
server->conns[i].used = false;
server->conns[i].gen = 1;
}
return server;
}
void http_server_free(HTTP_Server *server)
{
for (int i = 0, j = 0; j < server->num_conns; i++) {
if (!server->conns[i].used)
continue;
j++;
// TODO
}
close(server->secure_fd);
close(server->listen_fd);
if (server->secure_fd != -1)
socket_group_free(&server->group);
free(server);
}
int http_server_website(HTTP_Server *server, HTTP_String domain, HTTP_String cert_file, HTTP_String key_file)
{
return socket_group_add_domain(&server->group, domain, cert_file, key_file);
}
static void* server_memfunc(HTTP_MemoryFuncTag tag, void *ptr, int len, void *data) {
(void)data;
switch (tag) {
case HTTP_MEMFUNC_MALLOC:
return malloc(len);
case HTTP_MEMFUNC_FREE:
free(ptr);
return NULL;
}
return NULL;
}
int http_server_wait(HTTP_Server *server, HTTP_Request **req, HTTP_ResponseHandle *handle)
{
while (server->ready_count == 0) {
int num_polled = 0;
struct pollfd polled[MAX_CONNS+2];
int indices[MAX_CONNS+2];
if (server->num_conns < MAX_CONNS) {
if (server->listen_fd != -1) {
polled[num_polled].fd = server->listen_fd;
polled[num_polled].events = POLLIN;
polled[num_polled].revents = 0;
indices[num_polled] = -1;
num_polled++;
}
if (server->secure_fd != -1) {
polled[num_polled].fd = server->secure_fd;
polled[num_polled].events = POLLIN;
polled[num_polled].revents = 0;
indices[num_polled] = -1;
num_polled++;
}
}
for (int i = 0, j = 0; i < server->num_conns; i++) {
if (!server->conns[i].used)
continue;
j++;
int events = 0;
if (server->conns[i].socket.ssl_ctx)
events = server->conns[i].socket.event;
else {
switch (http_engine_state(&server->conns[i].engine)) {
case HTTP_ENGINE_STATE_SERVER_RECV_BUF: events = POLLIN; break;
case HTTP_ENGINE_STATE_SERVER_SEND_BUF: events = POLLOUT; break;
default:break;
}
}
if (events) {
polled[num_polled].fd = server->conns[i].socket.fd;
polled[num_polled].events = events;
polled[num_polled].revents = 0;
indices[num_polled] = i;
num_polled++;
}
}
int timeout = -1;
poll(polled, num_polled, timeout);
for (int i = 0; i < num_polled; i++) {
if (polled[i].fd == server->listen_fd || polled[i].fd == server->secure_fd) {
bool secure = false;
if (polled[i].fd == server->secure_fd)
secure = true;
if ((polled[i].revents & POLLIN) && server->num_conns < MAX_CONNS) {
int new_fd = accept(polled[i].fd, NULL, NULL);
int k = 0;
while (server->conns[k].used)
k++;
server->conns[k].used = true;
socket_accept(&server->conns[k].socket, secure ? &server->group : NULL, new_fd);
http_engine_init(&server->conns[k].engine, 0, server_memfunc, NULL);
server->num_conns++;
}
} else {
int connidx = indices[i];
Connection *conn = &server->conns[connidx];
socket_update(&conn->socket);
if (socket_state(&conn->socket) == SOCKET_STATE_ESTABLISHED_READY) {
switch (http_engine_state(&conn->engine)) {
int len;
char *buf;
case HTTP_ENGINE_STATE_SERVER_RECV_BUF:
buf = http_engine_recvbuf(&conn->engine, &len);
if (buf) {
int ret = socket_read(&conn->socket, buf, len);
http_engine_recvack(&conn->engine, ret);
}
break;
case HTTP_ENGINE_STATE_SERVER_SEND_BUF:
buf = http_engine_sendbuf(&conn->engine, &len);
if (buf) {
int ret = socket_write(&conn->socket, buf, len);
http_engine_sendack(&conn->engine, ret);
}
break;
default:
break;
}
switch (http_engine_state(&conn->engine)) {
int tail;
case HTTP_ENGINE_STATE_SERVER_PREP_STATUS:
tail = (server->ready_head + server->ready_count) % MAX_CONNS;
server->ready[tail] = connidx;
server->ready_count++;
break;
case HTTP_ENGINE_STATE_SERVER_CLOSED:
socket_close(&conn->socket);
break;
default:
break;
}
}
if (socket_state(&conn->socket) == SOCKET_STATE_DIED) {
socket_free(&conn->socket);
http_engine_free(&conn->engine);
conn->used = false;
server->num_conns--;
}
}
}
}
int index = server->ready[server->ready_head];
server->ready_head = (server->ready_head + 1) % MAX_CONNS;
server->ready_count--;
*req = http_engine_getreq(&server->conns[index].engine);
*handle = (HTTP_ResponseHandle) { server, index, server->conns[index].gen };
return 0;
}
static Connection*
handle2conn(HTTP_ResponseHandle handle)
{
HTTP_Server *server = handle.data0;
if (handle.data1 >= MAX_CONNS)
return NULL;
Connection *conn = &server->conns[handle.data1];
if (conn->gen != handle.data2)
return NULL;
return conn;
}
void http_response_status(HTTP_ResponseHandle res, int status)
{
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
http_engine_status(&conn->engine, status);
}
void http_response_header(HTTP_ResponseHandle res, const char *fmt, ...)
{
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
va_list args;
va_start(args, fmt);
http_engine_header_fmt2(&conn->engine, fmt, args);
va_end(args);
}
void http_response_body(HTTP_ResponseHandle res, char *src, int len)
{
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
if (len < 0)
len = strlen(src);
http_engine_body(&conn->engine, src, len);
}
void http_response_bodycap(HTTP_ResponseHandle res, int mincap)
{
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
http_engine_bodycap(&conn->engine, mincap);
}
char *http_response_bodybuf(HTTP_ResponseHandle res, int *cap)
{
Connection *conn = handle2conn(res);
if (conn == NULL) {
*cap = 0;
return NULL;
}
return http_engine_bodybuf(&conn->engine, cap);
}
void http_response_bodyack(HTTP_ResponseHandle res, int num)
{
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
http_engine_bodyack(&conn->engine, num);
}
void http_response_undo(HTTP_ResponseHandle res)
{
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
http_engine_undo(&conn->engine);
}
void http_response_done(HTTP_ResponseHandle res)
{
HTTP_Server *server = res.data0;
Connection *conn = handle2conn(res);
if (conn == NULL)
return;
http_engine_done(&conn->engine);
conn->gen++;
if (conn->gen == 0 || conn->gen == UINT16_MAX)
conn->gen = 1;
HTTP_EngineState state = http_engine_state(&conn->engine);
if (state == HTTP_ENGINE_STATE_SERVER_PREP_STATUS) {
int tail = (server->ready_head + server->ready_count) % MAX_CONNS;
server->ready[tail] = res.data1;
server->ready_count++;
}
if (state == HTTP_ENGINE_STATE_SERVER_CLOSED) {
socket_close(&conn->socket);
http_engine_free(&conn->engine);
server->num_conns--;
}
}//////////////////////////////////////////////////////////////////////
// src/router.c
//////////////////////////////////////////////////////////////////////
#ifndef _WIN32
#endif
typedef enum {
ROUTE_STATIC_DIR,
ROUTE_DYNAMIC,
} RouteType;
typedef struct {
RouteType type;
HTTP_String endpoint;
HTTP_String path;
HTTP_RouterFunc func;
void *ptr;
} Route;
struct HTTP_Router {
int num_routes;
int max_routes;
Route routes[];
};
HTTP_Router *http_router_init(void)
{
int max_routes = 32;
HTTP_Router *router = malloc(max_routes * sizeof(HTTP_Router));
if (router == NULL)
return NULL;
router->max_routes = max_routes;
router->num_routes = 0;
return router;
}
void http_router_free(HTTP_Router *router)
{
free(router);
}
void http_router_dir(HTTP_Router *router, HTTP_String endpoint, HTTP_String path)
{
if (router->num_routes == router->max_routes)
abort();
Route *route = &router->routes[router->num_routes++];
route->type = ROUTE_STATIC_DIR;
route->endpoint = endpoint;
route->path = path;
}
void http_router_func(HTTP_Router *router, HTTP_Method method,
HTTP_String endpoint, HTTP_RouterFunc func, void *ptr)
{
if (router->num_routes == router->max_routes)
abort();
Route *route = &router->routes[router->num_routes++];
// TODO: Don't ignore the method
route->type = ROUTE_DYNAMIC;
route->endpoint = endpoint;
route->func = func;
route->ptr = ptr;
}
static int valid_component_char(char c)
{
return is_alpha(c) || is_digit(c) || c == '-' || c == '_' || c == '.'; // TODO
}
static int parse_and_sanitize_path(HTTP_String path, HTTP_String *comps, int max_comps)
{
// We treat relative and absolute paths the same
if (path.len > 0 && path.ptr[0] == '/') {
path.ptr++;
path.len--;
if (path.len == 0)
return 0;
}
int num = 0;
int cur = 0;
for (;;) {
if (cur == path.len || !valid_component_char(path.ptr[cur]))
return -1; // Empty component
int start = cur;
do
cur++;
while (cur < path.len && valid_component_char(path.ptr[cur]));
HTTP_String comp = { path.ptr + start, cur - start };
if (http_streq(comp, HTTP_STR(".."))) {
if (num == 0)
return -1;
num--;
} else if (!http_streq(comp, HTTP_STR("."))) {
if (num == max_comps)
return -1;
comps[num++] = comp;
}
if (cur < path.len) {
if (path.ptr[cur] != '/')
return -1;
cur++;
}
if (cur == path.len)
break;
}
return num;
}
static int
serialize_parsed_path(HTTP_String *comps, int num_comps, char *dst, int max)
{
int len = 0;
for (int i = 0; i < num_comps; i++)
len += comps[i].len + 1;
if (len >= max)
return -1;
int copied = 0;
for (int i = 0; i < num_comps; i++) {
if (i > 0)
dst[copied++] = '/';
memcpy(dst + copied,
comps[i].ptr,
comps[i].len);
copied += comps[i].len;
}
dst[copied] = '\0';
return copied;
}
#define MAX_COMPS 32
static int sanitize_path(HTTP_String path, char *dst, int max)
{
HTTP_String comps[MAX_COMPS];
int num_comps = parse_and_sanitize_path(path, comps, MAX_COMPS);
if (num_comps < 0) return -1;
return serialize_parsed_path(comps, num_comps, dst, max);
}
static int swap_parents(HTTP_String original_parent_path, HTTP_String new_parent_path, HTTP_String path, char *mem, int max)
{
int num_original_parent_path_comps;
HTTP_String original_parent_path_comps[MAX_COMPS];
int num_new_parent_path_comps;
HTTP_String new_parent_path_comps[MAX_COMPS];
int num_path_comps;
HTTP_String path_comps[MAX_COMPS];
num_original_parent_path_comps = parse_and_sanitize_path(original_parent_path, original_parent_path_comps, MAX_COMPS);
num_new_parent_path_comps = parse_and_sanitize_path(new_parent_path, new_parent_path_comps, MAX_COMPS);
num_path_comps = parse_and_sanitize_path(path, path_comps, MAX_COMPS);
if (num_original_parent_path_comps < 0 || num_new_parent_path_comps < 0 || num_path_comps < 0)
return -1;
int match = 1;
if (num_path_comps < num_original_parent_path_comps)
match = 0;
else {
for (int i = 0; i < num_original_parent_path_comps; i++)
if (!http_streq(original_parent_path_comps[i], path_comps[i])) {
match = 0;
break;
}
}
if (!match)
return 0;
int num_result_comps = num_new_parent_path_comps + num_path_comps - num_original_parent_path_comps;
if (num_result_comps < 0 || num_result_comps > MAX_COMPS)
return -1;
HTTP_String result_comps[MAX_COMPS];
for (int i = 0; i < num_new_parent_path_comps; i++)
result_comps[i] = new_parent_path_comps[i];
for (int i = 0; i < num_path_comps; i++)
result_comps[num_new_parent_path_comps + i] = path_comps[num_original_parent_path_comps + i];
return serialize_parsed_path(result_comps, num_result_comps, mem, max);
}
#if _WIN32
typedef HANDLE File;
#else
typedef int File;
#endif
static int file_open(const char *path, File *handle, int *size)
{
#ifdef _WIN32
*handle = CreateFileA(
path,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL
);
if (*handle == INVALID_HANDLE_VALUE) {
DWORD error = GetLastError();
if (error == ERROR_FILE_NOT_FOUND)
return 1;
if (error == ERROR_ACCESS_DENIED)
return 1;
return -1;
}
LARGE_INTEGER fileSize;
if (!GetFileSizeEx(*handle, &fileSize)) {
CloseHandle(*handle);
return -1;
}
if (fileSize.QuadPart > INT_MAX) {
CloseHandle(*handle);
return -1;
}
*size = (int) fileSize.QuadPart;
return 0;
#else
*handle = open(path, O_RDONLY);
if (*handle < 0) {
if (errno == ENOENT)
return 1;
return -1;
}
struct stat info;
if (fstat(*handle, &info) < 0) {
close(*handle);
return -1;
}
if (S_ISDIR(info.st_mode)) {
close(*handle);
return 1;
}
if (info.st_size > INT_MAX) {
close(*handle);
return -1;
}
*size = (int) info.st_size;
return 0;
#endif
}
static void file_close(File file)
{
#ifdef _WIN32
CloseHandle(file);
#else
close(file);
#endif
}
static int file_read(File file, char *dst, int max)
{
#ifdef _WIN32
DWORD num;
BOOL ok = ReadFile(file, dst, max, &num, NULL);
if (!ok)
return -1;
return (int) num;
#else
return read(file, dst, max);
#endif
}
static int serve_file_or_index(HTTP_ResponseHandle res, HTTP_String base_endpoint, HTTP_String base_path, HTTP_String endpoint)
{
char mem[1<<12];
int ret = swap_parents(base_endpoint, base_path, endpoint, mem, sizeof(mem));
if (ret <= 0)
return ret;
HTTP_String path = {mem, ret}; // Note that this is zero terminated
int size;
File file;
ret = file_open(path.ptr, &file, &size);
if (ret == -1) {
http_response_status(res, 500);
http_response_done(res);
return 1;
}
if (ret == 1) {
// File missing
char index[] = "index.html";
if (path.len + sizeof(index) + 1 > sizeof(mem)) {
http_response_status(res, 500);
http_response_done(res);
return 1;
}
path.ptr[path.len++] = '/';
memcpy(path.ptr + path.len, index, sizeof(index));
path.len += sizeof(index)-1;
ret = file_open(path.ptr, &file, &size);
if (ret == -1) {
http_response_status(res, 500);
http_response_done(res);
return 1;
}
if (ret == 1)
return 0; // File missing
}
HTTP_ASSERT(ret == 0);
int cap;
char *dst;
http_response_status(res, 200);
http_response_bodycap(res, size);
dst = http_response_bodybuf(res, &cap);
if (dst) {
int copied = 0;
while (copied < size) {
int ret = file_read(file, dst + copied, size - copied);
if (ret < 0) goto err;
if (ret == 0) break;
copied += ret;
}
if (copied < size) goto err;
http_response_bodyack(res, size);
}
http_response_done(res);
file_close(file);
return 1;
err:
http_response_bodyack(res, 0);
http_response_undo(res);
http_response_status(res, 500);
http_response_done(res);
file_close(file);
return 1;
}
static int serve_dynamic_route(Route *route, HTTP_Request *req, HTTP_ResponseHandle res)
{
char path_mem[1<<12];
int path_len = sanitize_path(req->url.path, path_mem, (int) sizeof(path_mem));
if (path_len < 0) {
http_response_status(res, 400);
http_response_body(res, "Invalid path", -1);
http_response_done(res);
return 1;
}
HTTP_String path = {path_mem, path_len};
if (!http_streq(path, route->endpoint))
return 0;
route->func(req, res, route->ptr);
return 1;
}
void http_router_resolve(HTTP_Router *router, HTTP_Request *req, HTTP_ResponseHandle res)
{
for (int i = 0; i < router->num_routes; i++) {
Route *route = &router->routes[i];
switch (route->type) {
case ROUTE_STATIC_DIR:
if (serve_file_or_index(res,
route->endpoint,
route->path,
req->url.path))
return;
break;
case ROUTE_DYNAMIC:
if (serve_dynamic_route(route, req, res))
return;
break;
default:
http_response_status(res, 500);
http_response_done(res);
return;
}
}
http_response_status(res, 404);
http_response_done(res);
}
int http_serve(char *addr, int port, HTTP_Router *router)
{
int ret;
HTTP_Server *server = http_server_init((HTTP_String) { addr, strlen(addr) }, port, 0, (HTTP_String) {}, (HTTP_String) {});
if (server == NULL) {
http_router_free(router);
return -1;
}
for (;;) {
HTTP_Request *req;
HTTP_ResponseHandle res;
ret = http_server_wait(server, &req, &res);
if (ret < 0) {
http_server_free(server);
http_router_free(router);
return -1;
}
if (ret == 0)
continue;
http_router_resolve(router, req, res);
}
http_server_free(server);
http_router_free(router);
return 0;
}
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