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Add basic support for SOCKS 4 and HTTP CONNECT proxies.

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When the Proxy option is used, outgoing connections will be made via the
specified proxy. There is no support for authentication methods or for having
the proxy forward incoming connections, and there is no attempt to proxy UDP.
This commit is contained in:
Guus Sliepen 2012-04-18 23:19:40 +02:00
parent 84531fb6e6
commit b58d95eb29
8 changed files with 211 additions and 10 deletions
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16
src/protocol.c
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@ -68,7 +68,7 @@ bool check_id(const char *id) {
bool send_request(connection_t *c, const char *format, ...) {
va_list args;
char buffer[MAXBUFSIZE];
int len, request;
int len, request = 0;
/* Use vsnprintf instead of vxasprintf: faster, no memory
fragmentation, cleanup is automatic, and there is a limit on the
@ -125,6 +125,20 @@ void forward_request(connection_t *from) {
bool receive_request(connection_t *c) {
int request;
if(proxytype == PROXY_HTTP && c->allow_request == ID) {
if(!c->buffer[0] || c->buffer[0] == '\r')
return true;
if(!strncasecmp(c->buffer, "HTTP/1.1 ", 9)) {
if(!strncmp(c->buffer + 9, "200", 3)) {
logger(LOG_DEBUG, "Proxy request granted");
return true;
} else {
logger(LOG_DEBUG, "Proxy request rejected: %s", c->buffer + 9);
return false;
}
}
}
if(sscanf(c->buffer, "%d", &request) == 1) {
if((request < 0) || (request >= LAST) || !request_handlers[request]) {
ifdebug(META)