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add sendto hook to handle MSG_FASTOPEN flag

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This commit is contained in:
Aleksey Filippov
2015-01-23 17:14:28 +01:00
parent ea51cdac29
commit 8dd08e2cd2
3 changed files with 83 additions and 0 deletions
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4
src/core.h
View File

@ -95,6 +95,10 @@ typedef int (*getaddrinfo_t)(const char *, const char *, const struct addrinfo *
typedef int (*getnameinfo_t) (const struct sockaddr *, socklen_t, char *,
socklen_t, char *, socklen_t, int);
typedef ssize_t (*sendto_t) (int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *dest_addr, socklen_t addrlen);
extern connect_t true_connect;
extern gethostbyname_t true_gethostbyname;

17
src/libproxychains.c
View File

@ -52,6 +52,7 @@ getaddrinfo_t true_getaddrinfo;
freeaddrinfo_t true_freeaddrinfo;
getnameinfo_t true_getnameinfo;
gethostbyaddr_t true_gethostbyaddr;
sendto_t true_sendto;
int tcp_read_time_out;
int tcp_connect_time_out;
@ -113,6 +114,7 @@ static void do_init(void) {
proxychains_write_log(LOG_PREFIX "DLL init: proxychains-ng %s\n", proxychains_get_version());
SETUP_SYM(connect);
SETUP_SYM(sendto);
SETUP_SYM(gethostbyname);
SETUP_SYM(getaddrinfo);
SETUP_SYM(freeaddrinfo);
@ -479,3 +481,18 @@ struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type) {
}
return NULL;
}
ssize_t sendto(int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *dest_addr, socklen_t addrlen) {
#ifdef MSG_FASTOPEN
if (flags & MSG_FASTOPEN) {
if (!connect(sockfd, dest_addr, addrlen) && errno != EINPROGRESS) {
return -1;
}
dest_addr = NULL;
addrlen = 0;
flags &= ~MSG_FASTOPEN;
}
#endif
return true_sendto(sockfd, buf, len, flags, dest_addr, addrlen);
}