#include <windows.h>#include <stdio.h>
#define PROXY_IP "xxx.xxx.xxx.xxx"#define PROXY_PORT 1080
#define DEST_IP "xxx.xxx.xxx.xxx"#define DEST_PORT 8888
#define LOCAL_IP "xxx.xxx.xxx.xxx"#define LOCAL_PORT 6666
int main(){ int fd, fd_udp; struct sockaddr_in name; WSADATA wsaData; char buf[100]; int len; int i; if(WSAStartup(MAKEWORD( 2, 2 ), &wsaData )) return 1; if((fd_udp = socket(AF_INET, SOCK_DGRAM, 0)) == -1) return 1; if((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) return 1; memset(&name, 0, sizeof(name)); name.sin_family = AF_INET; name.sin_addr.s_addr = inet_addr(PROXY_IP); name.sin_port = htons(PROXY_PORT); if(connect(fd, (struct sockaddr*)&name, sizeof(name)) != 0) return 1; buf[0] = 5; buf[1] = 1; buf[2] = 0; send(fd, buf, 3, 0); recv(fd, buf, 2, 0); if(buf[0] != 5 || buf[1] != 0) return 1; buf[0] = 5; /* protocol version */ buf[1] = 3; /* command UDP associate */ buf[2] = 0; /* reserved */ buf[3] = 1; /* address type IP v4 */ len = sizeof(name); memset(&name, 0, sizeof(name)); name.sin_family = AF_INET; name.sin_addr.s_addr = inet_addr(LOCAL_IP); name.sin_port = htons(LOCAL_PORT); bind(fd_udp,(struct sockaddr *)&name,len); *(unsigned int*)&buf[4] = inet_addr(LOCAL_IP);//name.sin_addr.s_addr; *(unsigned short*)&buf[8] = htons(LOCAL_PORT); send(fd, buf, 10, 0); recv(fd, buf, 10, 0); if(buf[0] != 5) return 11; memset(&name, 0, sizeof(name)); name.sin_family = AF_INET; name.sin_addr.s_addr = *(int*)&buf[4]; name.sin_port = (*(short*)&buf[8]); connect(fd_udp, (struct sockaddr *)&name, sizeof(name)); for(i = 0; i <100; i++) { buf[0] = 0; /* reserved */ buf[1] = 0; /* reserved */ buf[2] = 0; /* standalone packet */ buf[3] = 1; /* address type IP v4 */ *(unsigned long*)&buf[4] = inet_addr(DEST_IP); *(unsigned short*)&buf[8] = htons(DEST_PORT); *(unsigned int*)&buf[10] = i; send(fd_udp, buf, 14, 0); recv(fd_udp, buf, 14, 0); printf("udp received: %d/n", *(int*)&buf[10]); } closesocket(fd_udp); closesocket(fd); WSACleanup(); return 0; }
