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Code Issues Releases Wiki Activity

implemented send hook logic

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This commit is contained in:
hugoc 2023-11-28 20:20:36 +01:00
parent 68180a6b66
commit 9f4cd23973
1 changed files with 32 additions and 2 deletions
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30
src/libproxychains.c
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@ -944,6 +944,7 @@ HOOKFUNC(ssize_t, sendto, int sockfd, const void *buf, size_t len, int flags,
PDEBUG("target: %s\n", inet_ntop(v6 ? AF_INET6 : AF_INET, v6 ? (void*)p_addr_in6 : (void*)p_addr_in, str, sizeof(str)));
PDEBUG("port: %d\n", port);
PDEBUG("client socket: %d\n", sockfd);
// check if connect called from proxydns
remote_dns_connect = !v6 && (ntohl(p_addr_in->s_addr) >> 24 == remote_dns_subnet);
@ -1006,6 +1007,7 @@ HOOKFUNC(ssize_t, sendto, int sockfd, const void *buf, size_t len, int flags,
return -1;
}
PDEBUG("Successfully sent UDP packet, leaving hook\n");
return SUCCESS;
}
@ -1028,7 +1030,35 @@ HOOKFUNC(ssize_t, send, int sockfd, const void *buf, size_t len, int flags){
INIT();
PFUNC();
//TODO hugoc
//Checker si c'est une SOCK_DGRAM + AFINET ou AFINET6
// Récupérer l'adresse liée avec getpeername
// Exécuter le hook sendto
int socktype = 0;
socklen_t optlen = 0;
optlen = sizeof(socktype);
getsockopt(sockfd, SOL_SOCKET, SO_TYPE, &socktype, &optlen);
if( socktype != SOCK_DGRAM){
PDEBUG("sockfd %d is not a SOCK_DGRAM socket, returning to true_send\n", sockfd);
return true_send(sockfd, buf, len, flags);
}
struct sockaddr addr;
socklen_t addr_len = sizeof(addr);
if(SUCCESS != getpeername(sockfd, &addr, &addr_len )){
PDEBUG("error getpeername, errno=%d. Returning to true_send()\n", errno);
return true_send(sockfd, buf, len, flags);
}
//DEBUGDECL(char str[256]);
sa_family_t fam = SOCKFAMILY(addr);
if(!(fam == AF_INET || fam == AF_INET6)){
PDEBUG("sockfd %d address familiy is not a AF_INET or AF_INET6, returning to true_send\n", sockfd);
return true_send(sockfd, buf, len, flags);
}
return sendto(sockfd, buf, len, flags, &addr, addr_len);
}
#ifdef MONTEREY_HOOKING