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udp wip 2

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hugoc
2023-09-08 14:42:52 +02:00
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parent 2c5ad9f81a
commit 8348e42608
3 changed files with 648 additions and 16 deletions
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src/core.h
+22 -7
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@@ -109,28 +109,38 @@ typedef struct{
unsigned char v6[16];
struct {
char len;
char name[255];
char name[256];
} dom;
} addr ;
} socks5_addr;
/* A structure to hold necessary information about an UDP relay server that has been set up
with a UDP_ASSOCIATE command issued on the tcp_sockfd */
typedef struct {
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.
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.
unsigned short dst_port; // ?? the DST_PORT sent in the UDP_ASSOCIATE command.
} udp_relay_data;
struct s_udp_relay_node * prev;
struct s_udp_relay_node * next;
} udp_relay_node;
/* A structure to hold the chain of udp relay servers assiociated with a client socket */
typedef struct {
typedef struct s_udp_relay_chain {
int sockfd; // the client socket for which the chain of relays has been set up
udp_relay_data * ud; // an array of relay, ud[0] being the closest to the client and u[len(ud)-1] the closest to the targets
unsigned int relay_count;
udp_relay_node * head; // head of the linked list of udp_relay_node
struct s_udp_relay_chain * prev;
struct s_udp_relay_chain * next;
} udp_relay_chain;
typedef struct {
udp_relay_chain * head;
udp_relay_chain * tail;
} udp_relay_chain_list;
int connect_proxy_chain (int sock, ip_type target_ip, unsigned short target_port,
proxy_data * pd, unsigned int proxy_count, chain_type ct,
unsigned int max_chain );
@@ -185,7 +195,12 @@ 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, ip_type *bnd_addr, unsigned short *bnd_port, char *user, char *pass);
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);
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);
#include "debug.h"