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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#ifndef _WIN32
#include <arpa/inet.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include "gnunet-vpn-packet.h"
#include "gnunet-dns-parser.h"
static char* pretty = /*{{{*/
/* 0 1 2 3 4 5 6
0123456789012345678901234567890123456789012345678901234567890123456789 */
"IPv6-Paket from xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx \n" //60
" to xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx \n" //120
/* 0 1 2 3 4 5 6
0123456789012345678901234567890123456789012345678901234567890123456789 */
" flow 0xXXX ( ) \n" //180
" length 0xXX ( ) \n" //240
" nexthdr 0xXX ( \n" //300
" hoplmt 0xXX ( ) \n" //360
"first 128 bytes of payload: \n" //420
/* 0 1 2 3 4 5 6
0123456789012345678901234567890123456789012345678901234567890123456789 */
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //490
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //560
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //630
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //700
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //770
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //840
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n" //910
"XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX | ................ \n";//980
/*}}}*/
static void pp_ip6adr(unsigned char* adr, char* dest) {{{
char tmp[3];
sprintf(tmp, "%02X", adr[0]);
memcpy(dest+0, tmp, 2);
sprintf(tmp, "%02X", adr[1]);
memcpy(dest+2, tmp, 2);
sprintf(tmp, "%02X", adr[2]);
memcpy(dest+5, tmp, 2);
sprintf(tmp, "%02X", adr[3]);
memcpy(dest+7, tmp, 2);
sprintf(tmp, "%02X", adr[4]);
memcpy(dest+10, tmp, 2);
sprintf(tmp, "%02X", adr[5]);
memcpy(dest+12, tmp, 2);
sprintf(tmp, "%02X", adr[6]);
memcpy(dest+15, tmp, 2);
sprintf(tmp, "%02X", adr[7]);
memcpy(dest+17, tmp, 2);
sprintf(tmp, "%02X", adr[8]);
memcpy(dest+20, tmp, 2);
sprintf(tmp, "%02X", adr[9]);
memcpy(dest+22, tmp, 2);
sprintf(tmp, "%02X", adr[10]);
memcpy(dest+25, tmp, 2);
sprintf(tmp, "%02X", adr[11]);
memcpy(dest+27, tmp, 2);
sprintf(tmp, "%02X", adr[12]);
memcpy(dest+30, tmp, 2);
sprintf(tmp, "%02X", adr[13]);
memcpy(dest+32, tmp, 2);
sprintf(tmp, "%02X", adr[14]);
memcpy(dest+35, tmp, 2);
sprintf(tmp, "%02X", adr[15]);
memcpy(dest+37, tmp, 2);
}}}
void pp_hexdump(unsigned char* data, char* dest, int max) {{{
int i;
char tmp[3];
char tmp2[2];
int off = 0;
int to = max > 16 ? 16 : max;
for (i = 0; i < to; i++) {
if (i == 8) off = 1;
sprintf(tmp, "%02x", data[i]);
memcpy(dest+(3*i)+off, tmp, 2);
if (isprint(data[i])) {
sprintf(tmp2, "%c", data[i]);
memcpy(dest+51+i, tmp2, 1);
}
}
}}}
void pp_write_header(char* dest, struct ip6_pkt* pkt) {{{
switch (pkt->ip6_hdr.nxthdr) {
case 0x3a:
memcpy(dest, "ICMPv6)", 7);
break;
case 0x06:
memcpy(dest, "TCP)", 4);
break;
case 0x11:
memcpy(dest, "UDP)", 4);
break;
default:
memcpy(dest, "unknown)", 8);
break;
}
}}}
void pkt_printf(struct ip6_pkt* pkt) {{{
char* buf = alloca(strlen(pretty)+1);
char tmp[9];
memcpy(buf, pretty, strlen(pretty)+1);
pp_ip6adr(pkt->ip6_hdr.sadr, buf+16);
pp_ip6adr(pkt->ip6_hdr.dadr, buf+76);
int flow = (ntohl(pkt->ip6_hdr.flowlbl));
sprintf(tmp, "%03x", flow);
memcpy(buf+138, tmp, 3);
sprintf(tmp, "%-8d", flow);
memcpy(buf+143, tmp, 8);
int length = ntohs(pkt->ip6_hdr.paylgth);
sprintf(tmp, "%02x", length);
memcpy(buf+198, tmp, 2);
sprintf(tmp, "%-3d", length);
memcpy(buf+203, tmp, 3);
sprintf(tmp, "%02x", pkt->ip6_hdr.nxthdr);
memcpy(buf+258, tmp, 2);
pp_write_header(buf+263, pkt);
sprintf(tmp, "%02x", pkt->ip6_hdr.hoplmt);
memcpy(buf+318, tmp, 2);
sprintf(tmp, "%-3d", pkt->ip6_hdr.hoplmt);
memcpy(buf+323, tmp, 3);
int size = ntohs(pkt->ip6_hdr.paylgth);
int i;
for(i = 0; i < 8; i++) {
if (16*i > size) break;
pp_hexdump(pkt->data + (16*i), buf + 420 + (i*70), size - 16*i);
}
printf("%s", buf);
printf("version: %d\n", pkt->ip6_hdr.version);
}}}
void pkt_printf_ip6tcp(struct ip6_tcp* pkt) {{{
printf("spt: %u\n", ntohs(pkt->tcp_hdr.spt));
printf("dpt: %u\n", ntohs(pkt->tcp_hdr.dpt));
printf("seq: %u\n", ntohs(pkt->tcp_hdr.seq));
printf("ack: %u\n", ntohs(pkt->tcp_hdr.ack));
printf("off: %u\n", ntohs(pkt->tcp_hdr.off));
printf("wsz: %u\n", ntohs(pkt->tcp_hdr.wsz));
printf("crc: 0x%x\n", ntohs(pkt->tcp_hdr.crc));
printf("urg: %u\n", ntohs(pkt->tcp_hdr.urg));
printf("flags: %c%c%c%c%c%c%c%c\n",
pkt->tcp_hdr.flg & 0x80 ? 'C' : '.',
pkt->tcp_hdr.flg & 0x40 ? 'E' : '.',
pkt->tcp_hdr.flg & 0x20 ? 'U' : '.',
pkt->tcp_hdr.flg & 0x10 ? 'A' : '.',
pkt->tcp_hdr.flg & 0x08 ? 'P' : '.',
pkt->tcp_hdr.flg & 0x04 ? 'R' : '.',
pkt->tcp_hdr.flg & 0x02 ? 'S' : '.',
pkt->tcp_hdr.flg & 0x01 ? 'F' : '.'
);
}}}
void pkt_printf_udp(struct udp_pkt* hdr) {
printf("spt: %u\n", ntohs(hdr->spt));
printf("dpt: %u\n", ntohs(hdr->dpt));
printf("len: %u\n", ntohs(hdr->len));
printf("crc: 0x%x\n", ntohs(hdr->crc));
}
void pkt_printf_ip6udp(struct ip6_udp* pkt) {{{
pkt_printf_udp(&pkt->udp_hdr);
}}}
static char* dns_types(unsigned short type) {{{
static char* types[] = { /*{{{*/
"",
"A", // 1 a host address
"NS", // 2 an authoritative name server
"MD", // 3 a mail destination (Obsolete - use MX)
"MF", // 4 a mail forwarder (Obsolete - use MX)
"CNAME", // 5 the canonical name for an alias
"SOA", // 6 marks the start of a zone of authority
"MB", // 7 a mailbox domain name (EXPERIMENTAL)
"MG", // 8 a mail group member (EXPERIMENTAL)
"MR", // 9 a mail rename domain name (EXPERIMENTAL)
"NULL", // 10 a null RR (EXPERIMENTAL)
"WKS", // 11 a well known service description
"PTR", // 12 a domain name pointer
"HINFO", // 13 host information
"MINFO", // 14 mailbox or mail list information
"MX", // 15 mail exchange
"TXT", // 16 text strings
"RP",
"AFSDB"
}; /*}}}*/
static char* qtypes[] = { /* + 252! {{{ */
"AXFR", // 252 A request for a transfer of an entire zone
"MAILB", // 253 A request for mailbox-related records (MB, MG or MR)
"MAILA", // 254 A request for mail agent RRs (Obsolete - see MX)
"*", // 255 A request for all records
}; /*}}}*/
if (type <= 18) return types[type];
if (type >= 252 && type <= 255) return qtypes[type-252];
switch(type) {
case 24: return "SIG";
case 25: return "KEY";
case 28: return "AAAA";
case 29: return "LOC";
case 33: return "SRV";
case 35: return "NAPTR";
case 36: return "KX";
case 37: return "CERT";
case 39: return "DNAME";
case 42: return "APL";
case 43: return "DS";
case 44: return "SSHFP";
case 45: return "IPSECKEY";
case 46: return "RRSIG";
case 47: return "NSEC";
case 48: return "DNSKEY";
case 49: return "DHCID";
case 50: return "NSEC3";
case 51: return "NSEC3PARAM";
case 55: return "HIP";
case 99: return "SPF";
case 249: return "TKEY";
case 250: return "TSIG";
case 32768: return "TA";
case 32769: return "DLV";
}
return 0;
}}}
static char* dns_classes(short class) { /* {{{ */
static char* classes[] = { /*{{{*/
"",
"IN", // 1 the Internet
"CS", // 2 the CSNET class (Obsolete - used only for examples in some obsolete RFCs)
"CH", // 3 the CHAOS class
"HS", // 4 Hesiod [Dyer 87]
}; /*}}}*/
if (class <= 4) return classes[class];
return 0;
}
/*}}}*/
void pkt_printf_dns(struct dns_pkt* upkt) {{{
struct dns_pkt_parsed* pkt = parse_dns_packet(upkt);
printf("\nDNS-Packet: ");
printf("\tid: %5d ", ntohs(pkt->s.id));
printf("\t%d: %s ", pkt->s.qr, pkt->s.qr == 0 ? "query " : "response");
printf("\top: %s ", (char*[]){ "query ",
"inverse q.",
"status ",
"inval "}[pkt->s.op]);
printf("\trecursion is%s desired ", pkt->s.rd == 0 ? " not" : " ");
unsigned short qdcount = ntohs(pkt->s.qdcount);
unsigned short ancount = ntohs(pkt->s.ancount);
unsigned short nscount = ntohs(pkt->s.nscount);
unsigned short arcount = ntohs(pkt->s.arcount);
printf("\t#qd: %5d ", qdcount);
printf("\t#an: %5d ", ancount);
printf("\t#ns: %5d ", nscount);
printf("\t#ar: %5d\n", arcount);
int i;
for (i = 0; i < qdcount; i++) { /*{{{*/
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)));
}
/*}}}*/
for (i = 0; i < ancount; i++) { /*{{{*/
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));
}
/*}}}*/
for (i = 0; i < nscount; i++) { /*{{{*/
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));
}
/*}}}*/
for (i = 0; i < arcount; i++) { /*{{{*/
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));
}
/*}}}*/
GNUNET_free(pkt);
}}}
void pkt_printf_udp_dns(struct udp_dns* pkt) {{{
pkt_printf_dns(&pkt->data);
}}}
void pkt_printf_ip6dns(struct ip6_udp_dns* pkt) {{{
pkt_printf_udp_dns(&pkt->udp_dns);
}}}
void pkt_printf_ipdns(struct ip_udp_dns* pkt) {{{
pkt_printf_udp_dns(&pkt->udp_dns);
}}}
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