12 #include "gnunet-vpn-packet.h"
13 #include "gnunet-dns-parser.h"
15 static char* pretty = /*{{{*/
17 0123456789012345678901234567890123456789012345678901234567890123456789 */
18 "IPv6-Paket from xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx \n" //60
19 " to xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx \n" //120
21 0123456789012345678901234567890123456789012345678901234567890123456789 */
22 " flow 0xXXX ( ) \n" //180
23 " length 0xXX ( ) \n" //240
24 " nexthdr 0xXX ( \n" //300
25 " hoplmt 0xXX ( ) \n" //360
26 "first 128 bytes of payload: \n" //420
28 0123456789012345678901234567890123456789012345678901234567890123456789 */
29 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //490
30 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //560
31 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //630
32 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //700
33 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //770
34 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //840
35 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //910
36 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n";//980
39 static void pp_ip6adr(unsigned char* adr, char* dest) {{{
42 sprintf(tmp, "%02X", adr[0]);
43 memcpy(dest+0, tmp, 2);
44 sprintf(tmp, "%02X", adr[1]);
45 memcpy(dest+2, tmp, 2);
47 sprintf(tmp, "%02X", adr[2]);
48 memcpy(dest+5, tmp, 2);
49 sprintf(tmp, "%02X", adr[3]);
50 memcpy(dest+7, tmp, 2);
52 sprintf(tmp, "%02X", adr[4]);
53 memcpy(dest+10, tmp, 2);
54 sprintf(tmp, "%02X", adr[5]);
55 memcpy(dest+12, tmp, 2);
57 sprintf(tmp, "%02X", adr[6]);
58 memcpy(dest+15, tmp, 2);
59 sprintf(tmp, "%02X", adr[7]);
60 memcpy(dest+17, tmp, 2);
62 sprintf(tmp, "%02X", adr[8]);
63 memcpy(dest+20, tmp, 2);
64 sprintf(tmp, "%02X", adr[9]);
65 memcpy(dest+22, tmp, 2);
67 sprintf(tmp, "%02X", adr[10]);
68 memcpy(dest+25, tmp, 2);
69 sprintf(tmp, "%02X", adr[11]);
70 memcpy(dest+27, tmp, 2);
72 sprintf(tmp, "%02X", adr[12]);
73 memcpy(dest+30, tmp, 2);
74 sprintf(tmp, "%02X", adr[13]);
75 memcpy(dest+32, tmp, 2);
77 sprintf(tmp, "%02X", adr[14]);
78 memcpy(dest+35, tmp, 2);
79 sprintf(tmp, "%02X", adr[15]);
80 memcpy(dest+37, tmp, 2);
83 void pp_hexdump(unsigned char* data, char* dest, int max) {{{
88 int to = max > 16 ? 16 : max;
89 for (i = 0; i < to; i++) {
91 sprintf(tmp, "%02x", data[i]);
92 memcpy(dest+(3*i)+off, tmp, 2);
93 if (isprint(data[i])) {
94 sprintf(tmp2, "%c", data[i]);
95 memcpy(dest+51+i, tmp2, 1);
100 void pp_write_header(char* dest, struct ip6_pkt* pkt) {{{
101 switch (pkt->ip6_hdr.nxthdr) {
103 memcpy(dest, "ICMPv6)", 7);
106 memcpy(dest, "TCP)", 4);
109 memcpy(dest, "UDP)", 4);
112 memcpy(dest, "unknown)", 8);
117 void pkt_printf(struct ip6_pkt* pkt) {{{
118 char* buf = alloca(strlen(pretty)+1);
121 memcpy(buf, pretty, strlen(pretty)+1);
123 pp_ip6adr(pkt->ip6_hdr.sadr, buf+16);
124 pp_ip6adr(pkt->ip6_hdr.dadr, buf+76);
126 int flow = (ntohl(pkt->ip6_hdr.flowlbl));
127 sprintf(tmp, "%03x", flow);
128 memcpy(buf+138, tmp, 3);
129 sprintf(tmp, "%-8d", flow);
130 memcpy(buf+143, tmp, 8);
132 int length = ntohs(pkt->ip6_hdr.paylgth);
133 sprintf(tmp, "%02x", length);
134 memcpy(buf+198, tmp, 2);
135 sprintf(tmp, "%-3d", length);
136 memcpy(buf+203, tmp, 3);
138 sprintf(tmp, "%02x", pkt->ip6_hdr.nxthdr);
139 memcpy(buf+258, tmp, 2);
140 pp_write_header(buf+263, pkt);
142 sprintf(tmp, "%02x", pkt->ip6_hdr.hoplmt);
143 memcpy(buf+318, tmp, 2);
144 sprintf(tmp, "%-3d", pkt->ip6_hdr.hoplmt);
145 memcpy(buf+323, tmp, 3);
147 int size = ntohs(pkt->ip6_hdr.paylgth);
149 for(i = 0; i < 8; i++) {
150 if (16*i > size) break;
151 pp_hexdump(pkt->data + (16*i), buf + 420 + (i*70), size - 16*i);
155 printf("version: %d\n", pkt->ip6_hdr.version);
158 void pkt_printf_ip6tcp(struct ip6_tcp* pkt) {{{
159 printf("spt: %u\n", ntohs(pkt->tcp_hdr.spt));
160 printf("dpt: %u\n", ntohs(pkt->tcp_hdr.dpt));
161 printf("seq: %u\n", ntohs(pkt->tcp_hdr.seq));
162 printf("ack: %u\n", ntohs(pkt->tcp_hdr.ack));
163 printf("off: %u\n", ntohs(pkt->tcp_hdr.off));
164 printf("wsz: %u\n", ntohs(pkt->tcp_hdr.wsz));
165 printf("crc: 0x%x\n", ntohs(pkt->tcp_hdr.crc));
166 printf("urg: %u\n", ntohs(pkt->tcp_hdr.urg));
167 printf("flags: %c%c%c%c%c%c%c%c\n",
168 pkt->tcp_hdr.flg & 0x80 ? 'C' : '.',
169 pkt->tcp_hdr.flg & 0x40 ? 'E' : '.',
170 pkt->tcp_hdr.flg & 0x20 ? 'U' : '.',
171 pkt->tcp_hdr.flg & 0x10 ? 'A' : '.',
172 pkt->tcp_hdr.flg & 0x08 ? 'P' : '.',
173 pkt->tcp_hdr.flg & 0x04 ? 'R' : '.',
174 pkt->tcp_hdr.flg & 0x02 ? 'S' : '.',
175 pkt->tcp_hdr.flg & 0x01 ? 'F' : '.'
179 void pkt_printf_ip6udp(struct ip6_udp* pkt) {{{
180 printf("spt: %u\n", ntohs(pkt->udp_hdr.spt));
181 printf("dpt: %u\n", ntohs(pkt->udp_hdr.dpt));
182 printf("len: %u\n", ntohs(pkt->udp_hdr.len));
183 printf("crc: 0x%x\n", ntohs(pkt->udp_hdr.crc));
186 static char* dns_types(unsigned short type) {{{
187 static char* types[] = { /*{{{*/
189 "A", // 1 a host address
190 "NS", // 2 an authoritative name server
191 "MD", // 3 a mail destination (Obsolete - use MX)
192 "MF", // 4 a mail forwarder (Obsolete - use MX)
193 "CNAME", // 5 the canonical name for an alias
194 "SOA", // 6 marks the start of a zone of authority
195 "MB", // 7 a mailbox domain name (EXPERIMENTAL)
196 "MG", // 8 a mail group member (EXPERIMENTAL)
197 "MR", // 9 a mail rename domain name (EXPERIMENTAL)
198 "NULL", // 10 a null RR (EXPERIMENTAL)
199 "WKS", // 11 a well known service description
200 "PTR", // 12 a domain name pointer
201 "HINFO", // 13 host information
202 "MINFO", // 14 mailbox or mail list information
203 "MX", // 15 mail exchange
204 "TXT", // 16 text strings
209 static char* qtypes[] = { /* + 252! {{{ */
210 "AXFR", // 252 A request for a transfer of an entire zone
211 "MAILB", // 253 A request for mailbox-related records (MB, MG or MR)
212 "MAILA", // 254 A request for mail agent RRs (Obsolete - see MX)
213 "*", // 255 A request for all records
216 if (type <= 18) return types[type];
217 if (type >= 252 && type <= 255) return qtypes[type-252];
220 case 24: return "SIG";
221 case 25: return "KEY";
222 case 28: return "AAAA";
223 case 29: return "LOC";
224 case 33: return "SRV";
225 case 35: return "NAPTR";
226 case 36: return "KX";
227 case 37: return "CERT";
228 case 39: return "DNAME";
229 case 42: return "APL";
230 case 43: return "DS";
231 case 44: return "SSHFP";
232 case 45: return "IPSECKEY";
233 case 46: return "RRSIG";
234 case 47: return "NSEC";
235 case 48: return "DNSKEY";
236 case 49: return "DHCID";
237 case 50: return "NSEC3";
238 case 51: return "NSEC3PARAM";
239 case 55: return "HIP";
240 case 99: return "SPF";
241 case 249: return "TKEY";
242 case 250: return "TSIG";
243 case 32768: return "TA";
244 case 32769: return "DLV";
251 static char* dns_classes(short class) { /* {{{ */
252 static char* classes[] = { /*{{{*/
254 "IN", // 1 the Internet
255 "CS", // 2 the CSNET class (Obsolete - used only for examples in some obsolete RFCs)
256 "CH", // 3 the CHAOS class
257 "HS", // 4 Hesiod [Dyer 87]
260 if (class <= 4) return classes[class];
265 void pkt_printf_dns(struct dns_pkt* upkt) {{{
266 struct dns_pkt_parsed* pkt = parse_dns_packet(upkt);
268 printf("\nDNS-Packet: ");
269 printf("\tid: %5d ", ntohs(pkt->s.id));
270 printf("\t%d: %s ", pkt->s.qr, pkt->s.qr == 0 ? "query " : "response");
271 printf("\top: %s ", (char*[]){ "query ",
274 "inval "}[pkt->s.op]);
275 printf("\trecursion is%s desired ", pkt->s.rd == 0 ? " not" : " ");
276 unsigned short qdcount = ntohs(pkt->s.qdcount);
277 unsigned short ancount = ntohs(pkt->s.ancount);
278 unsigned short nscount = ntohs(pkt->s.nscount);
279 unsigned short arcount = ntohs(pkt->s.arcount);
280 printf("\t#qd: %5d ", qdcount);
281 printf("\t#an: %5d ", ancount);
282 printf("\t#ns: %5d ", nscount);
283 printf("\t#ar: %5d\n", arcount);
286 for (i = 0; i < qdcount; i++) { /*{{{*/
287 printf("query for %s type=%d (%s) class=%d (%s)\n", pkt->queries[i]->name, ntohs(pkt->queries[i]->qtype), dns_types(ntohs(pkt->queries[i]->qtype)), ntohs(pkt->queries[i]->qclass), dns_classes(ntohs(pkt->queries[i]->qclass)));
290 for (i = 0; i < ancount; i++) { /*{{{*/
291 printf("answer for %s type=%d (%s) class=%d (%s) ttl=%d data_len=%d\n", pkt->answers[i]->name, ntohs(pkt->answers[i]->type), dns_types(ntohs(pkt->answers[i]->type)), ntohs(pkt->answers[i]->class), dns_classes(ntohs(pkt->answers[i]->class)), ntohl(pkt->answers[i]->ttl), ntohs(pkt->answers[i]->data_len));
294 for (i = 0; i < nscount; i++) { /*{{{*/
295 printf("nameservers for %s type=%d (%s) class=%d (%s) ttl=%d data_len=%d\n", pkt->nameservers[i]->name, ntohs(pkt->nameservers[i]->type), dns_types(ntohs(pkt->nameservers[i]->type)), ntohs(pkt->nameservers[i]->class), dns_classes(ntohs(pkt->nameservers[i]->class)), ntohl(pkt->nameservers[i]->ttl), ntohs(pkt->nameservers[i]->data_len));
298 for (i = 0; i < arcount; i++) { /*{{{*/
299 printf("additional record for %s type=%d (%s) class=%d (%s) ttl=%d data_len=%d\n", pkt->additional[i]->name, ntohs(pkt->additional[i]->type), dns_types(ntohs(pkt->additional[i]->type)), ntohs(pkt->additional[i]->class), dns_classes(ntohs(pkt->additional[i]->class)), ntohl(pkt->additional[i]->ttl), ntohs(pkt->additional[i]->data_len));
305 void pkt_printf_udp_dns(struct udp_dns* pkt) {{{
306 pkt_printf_dns(&pkt->data);
309 void pkt_printf_ip6dns(struct ip6_udp_dns* pkt) {{{
310 pkt_printf_udp_dns(&pkt->udp_dns);
313 void pkt_printf_ipdns(struct ip_udp_dns* pkt) {{{
314 pkt_printf_udp_dns(&pkt->udp_dns);