2 test-example/bogus-setup-request 127.0.0.1 19098 test-example/inside/inside 127.0.0.1 16096 test-example/outside/outside
6 #include <sys/socket.h>
7 #include <netinet/in.h>
17 | 00000 00 00 00 00 00 00 00 01 01 01 01 01 00 1a 74 65 ........ ......te |
18 ~~~~~~~~~~~ ~~~~~~~~~~~ ~~~~~~~~~~~ ~~~~~|~~~~~
19 sessionid sender's type sender's
20 zero in index fixed for name
23 | 00010 73 74 2d 65 78 61 6d 70 6c 65 2f 69 6e 73 69 64 st-examp le/insid |
24 | 00020 65 2f 69 6e 73 69 64 65 00 1c 74 65 73 74 2d 65 e/inside ..test-e |
25 ~~~~~|~~~~~~~~~~~~~~~~~
28 | 00030 78 61 6d 70 6c 65 2f 6f 75 74 73 69 64 65 2f 6f xample/o utside/o |
29 | 00040 75 74 73 69 64 65 8d f0 3f 35 d6 c8 1f c0 utside.. ?5.... |
30 ~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~
38 struct sockaddr_in sin;
42 static void endaddr(Ep *ep, char **argv, int base) {
44 ep->sin.sin_family=AF_INET;
45 r=inet_aton(argv[base],&ep->sin.sin_addr); assert(r);
46 ep->sin.sin_port=htons(atoi(argv[base+1]));
47 ep->name=argv[base+2];
50 static void endname(uint8_t **msgp, const Ep *ep) {
51 int l=strlen(ep->name); assert(l<=65535);
54 memcpy(*msgp, ep->name, l);
60 int main(int argc, char **argv) {
66 endaddr(&them,argv,4);
68 static const uint8_t mprefix[]={
69 0x00, 0x00, 0x00, 0x00,
70 0x00, 0x00, 0x00, 0x01,
71 0x01, 0x01, 0x01, 0x01,
73 static const uint8_t msuffix[]={
74 /* our nonce, fixed he he */
75 0x8d, 0xf0, 0x3f, 0x35, 0xd6, 0xc8, 0x1f, 0xc0
77 int msglen= (sizeof(mprefix) +
84 #define PREFIXSUFFIX(prefixsuffix) do { \
85 memcpy(msgp,prefixsuffix,sizeof(prefixsuffix)); \
86 msgp += sizeof(prefixsuffix); \
89 PREFIXSUFFIX(mprefix);
94 PREFIXSUFFIX(msuffix);
96 assert(msgp == msg+msglen);
98 struct protoent *proto=getprotobyname("udp");
99 int fd=socket(AF_INET, SOCK_DGRAM, proto->p_proto);
100 r=bind(fd,&us.sa,sizeof(us.sin)); if (r) { perror("bind us2"); exit(1); }
103 r=sendto(fd,msg,msglen,0,&them.sa,sizeof(them.sin));
104 if (r < 0) perror("sendto");
108 if (ferror(stdin)) { perror("getchar"); exit(1); }