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implements udp reception and fixes

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This commit is contained in:
hugoc
2023-12-10 16:05:19 +01:00
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parent 48422d4c07
commit 4c75e059d9
3 changed files with 298 additions and 41 deletions
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src/core.h
+8 -5
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@@ -109,7 +109,7 @@ typedef struct{
unsigned char v6[16];
struct {
char len;
char name[256];
char name[255];
} dom;
} addr ;
} socks5_addr;
@@ -119,9 +119,9 @@ with a UDP_ASSOCIATE command issued on the tcp_sockfd */
typedef struct s_udp_relay_node {
int tcp_sockfd; // the tcp socket on which the UDP_ASSOCIATE command has been issued. Closing this fd closes the udp relay.
proxy_data pd; // the associated SOCKS5 server
socks5_addr bnd_addr; // the BND_ADDR returned by the udp relay server in the response to the UDP_ASSOCIATE command.
ip_type bnd_addr; // the BND_ADDR returned by the udp relay server in the response to the UDP_ASSOCIATE command.
unsigned short bnd_port; // the BND_PORT returned by the udp relay server in the response to the UDP_ASSOCIATE command.
socks5_addr dst_addr; // ?? the DST_ADDR sent in the UDP_ASSOCIATE command.
ip_type dst_addr; // ?? the DST_ADDR sent in the UDP_ASSOCIATE command.
unsigned short dst_port; // ?? the DST_PORT sent in the UDP_ASSOCIATE command.
struct s_udp_relay_node * prev;
struct s_udp_relay_node * next;
@@ -178,6 +178,9 @@ extern freeaddrinfo_t true_freeaddrinfo;
extern getnameinfo_t true_getnameinfo;
extern gethostbyaddr_t true_gethostbyaddr;
extern sendto_t true_sendto;
extern recvfrom_t true_recvfrom;
extern recv_t true_recv;
extern send_t true_send;
struct gethostbyname_data {
struct hostent hostent_space;
@@ -196,13 +199,13 @@ void proxy_freeaddrinfo(struct addrinfo *res);
void core_initialize(void);
void core_unload(void);
static int udp_associate(int sock, ip_type * dst_addr, unsigned short dst_port, socks5_addr *bnd_addr, unsigned short *bnd_port, char *user, char *pass);
static int udp_associate(int sock, ip_type * dst_addr, unsigned short dst_port, ip_type *bnd_addr, unsigned short *bnd_port, char *user, char *pass);
udp_relay_chain* get_relay_chain(udp_relay_chain_list chains_list, int sockfd);
void del_relay_chain(udp_relay_chain_list* chains_list, udp_relay_chain* chain);
void add_relay_chain(udp_relay_chain_list* chains_list, udp_relay_chain* new_chain);
udp_relay_chain * open_relay_chain(proxy_data *pd, unsigned int proxy_count, chain_type ct, unsigned int max_chains);
int send_udp_packet(int sockfd, udp_relay_chain chain, ip_type target_ip, unsigned short target_port, char frag, char * data, unsigned int data_len);
int receive_udp_packet(int sockfd, udp_relay_chain chain, ip_type* src_addr, unsigned short* src_port, char* data, unsigned int data_len );
#include "debug.h"
#endif