7 #include "gnunet-vpn-packet.h"
9 static char* pretty = /*{{{*/
11 0123456789012345678901234567890123456789012345678901234567890123456789 */
12 "IPv6-Paket from xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx \n" //60
13 " to xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx \n" //120
15 0123456789012345678901234567890123456789012345678901234567890123456789 */
16 " flow 0xXXX ( ) \n" //180
17 " length 0xXX ( ) \n" //240
18 " nexthdr 0xXX ( \n" //300
19 " hoplmt 0xXX ( ) \n" //360
20 "first 128 bytes of payload: \n" //420
22 0123456789012345678901234567890123456789012345678901234567890123456789 */
23 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //490
24 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //560
25 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //630
26 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //700
27 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //770
28 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //840
29 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //910
30 "XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n";//980
33 static void pp_ip6adr(unsigned char* adr, char* dest) {{{
36 sprintf(tmp, "%02X", adr[0]);
37 memcpy(dest+0, tmp, 2);
38 sprintf(tmp, "%02X", adr[1]);
39 memcpy(dest+2, tmp, 2);
41 sprintf(tmp, "%02X", adr[2]);
42 memcpy(dest+5, tmp, 2);
43 sprintf(tmp, "%02X", adr[3]);
44 memcpy(dest+7, tmp, 2);
46 sprintf(tmp, "%02X", adr[4]);
47 memcpy(dest+10, tmp, 2);
48 sprintf(tmp, "%02X", adr[5]);
49 memcpy(dest+12, tmp, 2);
51 sprintf(tmp, "%02X", adr[6]);
52 memcpy(dest+15, tmp, 2);
53 sprintf(tmp, "%02X", adr[7]);
54 memcpy(dest+17, tmp, 2);
56 sprintf(tmp, "%02X", adr[8]);
57 memcpy(dest+20, tmp, 2);
58 sprintf(tmp, "%02X", adr[9]);
59 memcpy(dest+22, tmp, 2);
61 sprintf(tmp, "%02X", adr[10]);
62 memcpy(dest+25, tmp, 2);
63 sprintf(tmp, "%02X", adr[11]);
64 memcpy(dest+27, tmp, 2);
66 sprintf(tmp, "%02X", adr[12]);
67 memcpy(dest+30, tmp, 2);
68 sprintf(tmp, "%02X", adr[13]);
69 memcpy(dest+32, tmp, 2);
71 sprintf(tmp, "%02X", adr[14]);
72 memcpy(dest+35, tmp, 2);
73 sprintf(tmp, "%02X", adr[15]);
74 memcpy(dest+37, tmp, 2);
77 void pp_hexdump(unsigned char* data, char* dest, int max) {{{
82 int to = max > 16 ? 16 : max;
83 for (i = 0; i < to; i++) {
85 sprintf(tmp, "%02x", data[i]);
86 memcpy(dest+(3*i)+off, tmp, 2);
87 if (isprint(data[i])) {
88 sprintf(tmp2, "%c", data[i]);
89 memcpy(dest+51+i, tmp2, 1);
94 void pp_write_header(char* dest, struct ip6_pkt* pkt) {{{
95 switch (pkt->ip6_hdr.nxthdr) {
97 memcpy(dest, "ICMPv6)", 7);
100 memcpy(dest, "TCP)", 4);
103 memcpy(dest, "UDP)", 4);
106 memcpy(dest, "unknown)", 8);
111 void pkt_printf(struct ip6_pkt* pkt) {{{
112 char* buf = alloca(strlen(pretty)+1);
115 memcpy(buf, pretty, strlen(pretty)+1);
117 pp_ip6adr(pkt->ip6_hdr.sadr, buf+16);
118 pp_ip6adr(pkt->ip6_hdr.dadr, buf+76);
120 int flow = (ntohl(pkt->ip6_hdr.flowlbl));
121 sprintf(tmp, "%03x", flow);
122 memcpy(buf+138, tmp, 3);
123 sprintf(tmp, "%-8d", flow);
124 memcpy(buf+143, tmp, 8);
126 int length = ntohs(pkt->ip6_hdr.paylgth);
127 sprintf(tmp, "%02x", length);
128 memcpy(buf+198, tmp, 2);
129 sprintf(tmp, "%-3d", length);
130 memcpy(buf+203, tmp, 3);
132 sprintf(tmp, "%02x", pkt->ip6_hdr.nxthdr);
133 memcpy(buf+258, tmp, 2);
134 pp_write_header(buf+263, pkt);
136 sprintf(tmp, "%02x", pkt->ip6_hdr.hoplmt);
137 memcpy(buf+318, tmp, 2);
138 sprintf(tmp, "%-3d", pkt->ip6_hdr.hoplmt);
139 memcpy(buf+323, tmp, 3);
141 int size = ntohs(pkt->ip6_hdr.paylgth);
143 for(i = 0; i < 8; i++) {
144 if (16*i > size) break;
145 pp_hexdump(pkt->data + (16*i), buf + 420 + (i*70), size - 16*i);
151 void pkt_printf_ip6tcp(struct ip6_tcp* pkt) {{{
152 printf("spt: %u\n", ntohs(pkt->tcp_hdr.spt));
153 printf("dpt: %u\n", ntohs(pkt->tcp_hdr.dpt));
154 printf("seq: %u\n", ntohs(pkt->tcp_hdr.seq));
155 printf("ack: %u\n", ntohs(pkt->tcp_hdr.ack));
156 printf("off: %u\n", ntohs(pkt->tcp_hdr.off));
157 printf("wsz: %u\n", ntohs(pkt->tcp_hdr.wsz));
158 printf("crc: 0x%x\n", ntohs(pkt->tcp_hdr.crc));
159 printf("urg: %u\n", ntohs(pkt->tcp_hdr.urg));
160 printf("flags: %c%c%c%c%c%c%c%c\n",
161 pkt->tcp_hdr.flg & 0x80 ? 'C' : '.',
162 pkt->tcp_hdr.flg & 0x40 ? 'E' : '.',
163 pkt->tcp_hdr.flg & 0x20 ? 'U' : '.',
164 pkt->tcp_hdr.flg & 0x10 ? 'A' : '.',
165 pkt->tcp_hdr.flg & 0x08 ? 'P' : '.',
166 pkt->tcp_hdr.flg & 0x04 ? 'R' : '.',
167 pkt->tcp_hdr.flg & 0x02 ? 'S' : '.',
168 pkt->tcp_hdr.flg & 0x01 ? 'F' : '.'
172 void pkt_printf_ip6udp(struct ip6_udp* pkt) {{{
173 printf("spt: %u\n", ntohs(pkt->udp_hdr.spt));
174 printf("dpt: %u\n", ntohs(pkt->udp_hdr.dpt));
175 printf("len: %u\n", ntohs(pkt->udp_hdr.len));
176 printf("crc: 0x%x\n", ntohs(pkt->udp_hdr.crc));
179 static char* dns_types(unsigned short type) {{{
180 static char* types[] = { /*{{{*/
182 "A", // 1 a host address
183 "NS", // 2 an authoritative name server
184 "MD", // 3 a mail destination (Obsolete - use MX)
185 "MF", // 4 a mail forwarder (Obsolete - use MX)
186 "CNAME", // 5 the canonical name for an alias
187 "SOA", // 6 marks the start of a zone of authority
188 "MB", // 7 a mailbox domain name (EXPERIMENTAL)
189 "MG", // 8 a mail group member (EXPERIMENTAL)
190 "MR", // 9 a mail rename domain name (EXPERIMENTAL)
191 "NULL", // 10 a null RR (EXPERIMENTAL)
192 "WKS", // 11 a well known service description
193 "PTR", // 12 a domain name pointer
194 "HINFO", // 13 host information
195 "MINFO", // 14 mailbox or mail list information
196 "MX", // 15 mail exchange
197 "TXT", // 16 text strings
202 static char* qtypes[] = { /* + 252! {{{ */
203 "AXFR", // 252 A request for a transfer of an entire zone
204 "MAILB", // 253 A request for mailbox-related records (MB, MG or MR)
205 "MAILA", // 254 A request for mail agent RRs (Obsolete - see MX)
206 "*", // 255 A request for all records
209 if (type <= 18) return types[type];
210 if (type >= 252 && type <= 255) return qtypes[type-252];
213 case 24: return "SIG";
214 case 25: return "KEY";
215 case 28: return "AAAA";
216 case 29: return "LOC";
217 case 33: return "SRV";
218 case 35: return "NAPTR";
219 case 36: return "KX";
220 case 37: return "CERT";
221 case 39: return "DNAME";
222 case 42: return "APL";
223 case 43: return "DS";
224 case 44: return "SSHFP";
225 case 45: return "IPSECKEY";
226 case 46: return "RRSIG";
227 case 47: return "NSEC";
228 case 48: return "DNSKEY";
229 case 49: return "DHCID";
230 case 50: return "NSEC3";
231 case 51: return "NSEC3PARAM";
232 case 55: return "HIP";
233 case 99: return "SPF";
234 case 249: return "TKEY";
235 case 250: return "TSIG";
236 case 32768: return "TA";
237 case 32769: return "DLV";
244 static char* dns_classes(short class) {{{
245 static char* classes[] = { /*{{{*/
247 "IN", // 1 the Internet
248 "CS", // 2 the CSNET class (Obsolete - used only for examples in some obsolete RFCs)
249 "CH", // 3 the CHAOS class
250 "HS", // 4 Hesiod [Dyer 87]
253 if (class <= 4) return classes[class];
257 void pkt_printf_dns(struct udp_dns* pkt) {{{
258 printf("DNS-Packet:\n");
259 printf("\tid: %d\n", ntohs(pkt->data.id));
260 printf("\t%d: %s\n", pkt->data.qr, pkt->data.qr == 0 ? "query" : "response");
261 printf("\top: %s\n", (char*[]){"query", "inverse q.", "status", "inval"}[pkt->data.op]);
262 printf("\trecursion is%s desired\n", pkt->data.rd == 0 ? " not" : "");
263 unsigned short qdcount = ntohs(pkt->data.qdcount);
264 printf("\t#qd: %d\n", qdcount);
265 printf("\t#an: %d\n", ntohs(pkt->data.ancount));
266 printf("\t#ns: %d\n", ntohs(pkt->data.nscount));
267 printf("\t#ar: %d\n", ntohs(pkt->data.arcount));
269 struct dns_query** queries = alloca(qdcount*sizeof(struct dns_query*));
270 unsigned int idx = 0;
273 for (i = 0; i < qdcount; i++) {
274 queries[i] = alloca(sizeof(struct dns_query));
275 queries[i]->name = alloca(255); // see RFC1035
276 unsigned char* name = queries[i]->name;
277 int len = pkt->data.data[idx++];
279 memcpy(name, pkt->data.data+idx, len);
284 len = pkt->data.data[idx++];
288 queries[i]->qtype = *((unsigned short*)(pkt->data.data+idx));
290 queries[i]->qclass = *((unsigned short*)(pkt->data.data+idx));
292 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)));
296 void pkt_printf_ip6dns(struct ip6_udp_dns* pkt) {{{
297 pkt_printf_dns(&pkt->udp_dns);
300 void pkt_printf_ipdns(struct ip_udp_dns* pkt) {{{
301 pkt_printf_dns(&pkt->udp_dns);