11 #include <arpa/inet.h>
13 #include "gnunet-vpn-packet.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);
157 void pkt_printf_ip6tcp(struct ip6_tcp* pkt) {{{
158 printf("spt: %u\n", ntohs(pkt->tcp_hdr.spt));
159 printf("dpt: %u\n", ntohs(pkt->tcp_hdr.dpt));
160 printf("seq: %u\n", ntohs(pkt->tcp_hdr.seq));
161 printf("ack: %u\n", ntohs(pkt->tcp_hdr.ack));
162 printf("off: %u\n", ntohs(pkt->tcp_hdr.off));
163 printf("wsz: %u\n", ntohs(pkt->tcp_hdr.wsz));
164 printf("crc: 0x%x\n", ntohs(pkt->tcp_hdr.crc));
165 printf("urg: %u\n", ntohs(pkt->tcp_hdr.urg));
166 printf("flags: %c%c%c%c%c%c%c%c\n",
167 pkt->tcp_hdr.flg & 0x80 ? 'C' : '.',
168 pkt->tcp_hdr.flg & 0x40 ? 'E' : '.',
169 pkt->tcp_hdr.flg & 0x20 ? 'U' : '.',
170 pkt->tcp_hdr.flg & 0x10 ? 'A' : '.',
171 pkt->tcp_hdr.flg & 0x08 ? 'P' : '.',
172 pkt->tcp_hdr.flg & 0x04 ? 'R' : '.',
173 pkt->tcp_hdr.flg & 0x02 ? 'S' : '.',
174 pkt->tcp_hdr.flg & 0x01 ? 'F' : '.'
178 void pkt_printf_ip6udp(struct ip6_udp* pkt) {{{
179 printf("spt: %u\n", ntohs(pkt->udp_hdr.spt));
180 printf("dpt: %u\n", ntohs(pkt->udp_hdr.dpt));
181 printf("len: %u\n", ntohs(pkt->udp_hdr.len));
182 printf("crc: 0x%x\n", ntohs(pkt->udp_hdr.crc));
185 static char* dns_types(unsigned short type) {{{
186 static char* types[] = { /*{{{*/
188 "A", // 1 a host address
189 "NS", // 2 an authoritative name server
190 "MD", // 3 a mail destination (Obsolete - use MX)
191 "MF", // 4 a mail forwarder (Obsolete - use MX)
192 "CNAME", // 5 the canonical name for an alias
193 "SOA", // 6 marks the start of a zone of authority
194 "MB", // 7 a mailbox domain name (EXPERIMENTAL)
195 "MG", // 8 a mail group member (EXPERIMENTAL)
196 "MR", // 9 a mail rename domain name (EXPERIMENTAL)
197 "NULL", // 10 a null RR (EXPERIMENTAL)
198 "WKS", // 11 a well known service description
199 "PTR", // 12 a domain name pointer
200 "HINFO", // 13 host information
201 "MINFO", // 14 mailbox or mail list information
202 "MX", // 15 mail exchange
203 "TXT", // 16 text strings
208 static char* qtypes[] = { /* + 252! {{{ */
209 "AXFR", // 252 A request for a transfer of an entire zone
210 "MAILB", // 253 A request for mailbox-related records (MB, MG or MR)
211 "MAILA", // 254 A request for mail agent RRs (Obsolete - see MX)
212 "*", // 255 A request for all records
215 if (type <= 18) return types[type];
216 if (type >= 252 && type <= 255) return qtypes[type-252];
219 case 24: return "SIG";
220 case 25: return "KEY";
221 case 28: return "AAAA";
222 case 29: return "LOC";
223 case 33: return "SRV";
224 case 35: return "NAPTR";
225 case 36: return "KX";
226 case 37: return "CERT";
227 case 39: return "DNAME";
228 case 42: return "APL";
229 case 43: return "DS";
230 case 44: return "SSHFP";
231 case 45: return "IPSECKEY";
232 case 46: return "RRSIG";
233 case 47: return "NSEC";
234 case 48: return "DNSKEY";
235 case 49: return "DHCID";
236 case 50: return "NSEC3";
237 case 51: return "NSEC3PARAM";
238 case 55: return "HIP";
239 case 99: return "SPF";
240 case 249: return "TKEY";
241 case 250: return "TSIG";
242 case 32768: return "TA";
243 case 32769: return "DLV";
250 static char* dns_classes(short class) {{{
251 static char* classes[] = { /*{{{*/
253 "IN", // 1 the Internet
254 "CS", // 2 the CSNET class (Obsolete - used only for examples in some obsolete RFCs)
255 "CH", // 3 the CHAOS class
256 "HS", // 4 Hesiod [Dyer 87]
259 if (class <= 4) return classes[class];
263 void pkt_printf_dns(struct dns_pkt* pkt) {{{
264 printf("DNS-Packet:\n");
265 printf("\tid: %d\n", ntohs(pkt->id));
266 printf("\t%d: %s\n", pkt->qr, pkt->qr == 0 ? "query" : "response");
267 printf("\top: %s\n", (char*[]){"query", "inverse q.", "status", "inval"}[pkt->op]);
268 printf("\trecursion is%s desired\n", pkt->rd == 0 ? " not" : "");
269 unsigned short qdcount = ntohs(pkt->qdcount);
270 printf("\t#qd: %d\n", qdcount);
271 printf("\t#an: %d\n", ntohs(pkt->ancount));
272 printf("\t#ns: %d\n", ntohs(pkt->nscount));
273 printf("\t#ar: %d\n", ntohs(pkt->arcount));
275 struct dns_query** queries = alloca(qdcount*sizeof(struct dns_query*));
276 unsigned int idx = 0;
279 for (i = 0; i < qdcount; i++) {
280 queries[i] = alloca(sizeof(struct dns_query));
281 queries[i]->name = alloca(255); // see RFC1035
282 unsigned char* name = queries[i]->name;
283 int len = pkt->data[idx++];
285 memcpy(name, pkt->data+idx, len);
290 len = pkt->data[idx++];
294 queries[i]->qtype = *((unsigned short*)(pkt->data+idx));
296 queries[i]->qclass = *((unsigned short*)(pkt->data+idx));
298 printf("query for %s type=%d (%s) class=%d (%s)\n", queries[i]->name, ntohs(queries[i]->qtype), dns_types(ntohs(queries[i]->qtype)), ntohs(queries[i]->qclass), dns_classes(ntohs(queries[i]->qclass)));
302 void pkt_printf_udp_dns(struct udp_dns* pkt) {{{
303 pkt_printf_dns(&pkt->data);
306 void pkt_printf_ip6dns(struct ip6_udp_dns* pkt) {{{
307 pkt_printf_udp_dns(&pkt->udp_dns);
310 void pkt_printf_ipdns(struct ip_udp_dns* pkt) {{{
311 pkt_printf_udp_dns(&pkt->udp_dns);