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#36 fetch remote ip number after login
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parent
fd1ebc520a
commit
225d48dbc3
72
src/iodine.c
72
src/iodine.c
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@ -473,6 +473,16 @@ send_version(int fd, uint32_t version)
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send_packet(fd, 'V', data, sizeof(data));
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}
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static void
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send_ip_request(int fd, int userid)
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{
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char buf[512] = "I_.";
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buf[1] = b32_5to8(userid);
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strncat(buf, topdomain, 512 - strlen(buf));
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send_query(fd, buf);
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}
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static void
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send_case_check(int fd)
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{
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@ -622,6 +632,66 @@ handshake_login(int dns_fd, int seed)
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return 1;
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}
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static int
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handshake_raw_udp(int dns_fd)
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{
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struct timeval tv;
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char in[4096];
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fd_set fds;
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int i;
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int r;
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int read;
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unsigned remoteaddr = 0;
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struct in_addr server;
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fprintf(stderr, "Testing raw UDP data to the server");
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fflush(stderr);
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for (i=0; running && i<3 ;i++) {
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tv.tv_sec = i + 1;
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tv.tv_usec = 0;
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send_ip_request(dns_fd, userid);
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FD_ZERO(&fds);
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FD_SET(dns_fd, &fds);
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r = select(dns_fd + 1, &fds, NULL, NULL, &tv);
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if(r > 0) {
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read = read_dns(dns_fd, in, sizeof(in));
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if (read == 5 && in[0] == 'I') {
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/* Received IP address */
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remoteaddr = (in[1] & 0xff);
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remoteaddr <<= 8;
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remoteaddr |= (in[2] & 0xff);
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remoteaddr <<= 8;
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remoteaddr |= (in[3] & 0xff);
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remoteaddr <<= 8;
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remoteaddr |= (in[4] & 0xff);
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server.s_addr = ntohl(remoteaddr);
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break;
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}
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} else {
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fprintf(stderr, ".");
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fflush(stderr);
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}
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}
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if (!remoteaddr) {
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fprintf(stderr, " failed to get IP.\n");
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return 1;
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}
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fprintf(stderr, " at %s", inet_ntoa(server));
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fflush(stderr);
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/* TODO do login against port 53 on remote server
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* based on the old seed. If reply received,
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* switch to raw udp mode */
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fprintf(stderr, ": not implemented\n");
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return 1;
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/* TODO and then return 0 on success */
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}
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static void
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handshake_case_check(int dns_fd)
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{
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@ -871,6 +941,8 @@ handshake(int dns_fd, int autodetect_frag_size, int fragsize)
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return r;
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}
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handshake_raw_udp(dns_fd);
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handshake_case_check(dns_fd);
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if (case_preserved) {
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