1 /* $OpenBSD: print-pflog.c,v 1.25 2014/08/14 12:44:44 mpi Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 */ 23 24 #include <sys/types.h> 25 #include <sys/param.h> 26 #include <sys/time.h> 27 #include <sys/socket.h> 28 #include <sys/file.h> 29 #include <sys/ioctl.h> 30 #include <sys/mbuf.h> 31 #include <sys/proc.h> 32 33 #ifndef NO_PID 34 #define NO_PID (32766+1) 35 #endif 36 37 struct rtentry; 38 #include <net/if.h> 39 #include <net/if_pflog.h> 40 41 #include <netinet/in.h> 42 #include <netinet/ip.h> 43 44 #include <net/pfvar.h> 45 46 #include <arpa/inet.h> 47 48 #include <ctype.h> 49 #include <netdb.h> 50 #include <pcap.h> 51 #include <signal.h> 52 #include <stdio.h> 53 54 #include "interface.h" 55 #include "addrtoname.h" 56 57 char *pf_reasons[PFRES_MAX+2] = PFRES_NAMES; 58 59 void 60 pflog_if_print(u_char *user, const struct pcap_pkthdr *h, 61 register const u_char *p) 62 { 63 u_int length = h->len; 64 u_int hdrlen; 65 u_int caplen = h->caplen; 66 const struct ip *ip; 67 #ifdef INET6 68 const struct ip6_hdr *ip6; 69 #endif 70 const struct pfloghdr *hdr; 71 u_int8_t af; 72 73 ts_print(&h->ts); 74 75 /* check length */ 76 if (caplen < sizeof(u_int8_t)) { 77 printf("[|pflog]"); 78 goto out; 79 } 80 81 #define MIN_PFLOG_HDRLEN 45 82 hdr = (struct pfloghdr *)p; 83 if (hdr->length < MIN_PFLOG_HDRLEN) { 84 printf("[pflog: invalid header length!]"); 85 goto out; 86 } 87 hdrlen = (hdr->length + 3) & 0xfc; 88 89 if (caplen < hdrlen) { 90 printf("[|pflog]"); 91 goto out; 92 } 93 94 /* 95 * Some printers want to get back at the link level addresses, 96 * and/or check that they're not walking off the end of the packet. 97 * Rather than pass them all the way down, we set these globals. 98 */ 99 packetp = p; 100 snapend = p + caplen; 101 102 hdr = (struct pfloghdr *)p; 103 if (eflag) { 104 printf("rule "); 105 if (ntohl(hdr->rulenr) == (u_int32_t) -1) 106 printf("def"); 107 else { 108 printf("%u", ntohl(hdr->rulenr)); 109 if (hdr->ruleset[0]) { 110 printf(".%s", hdr->ruleset); 111 if (ntohl(hdr->subrulenr) == (u_int32_t) -1) 112 printf(".def"); 113 else 114 printf(".%u", ntohl(hdr->subrulenr)); 115 } 116 } 117 if (hdr->reason < PFRES_MAX) 118 printf("/(%s) ", pf_reasons[hdr->reason]); 119 else 120 printf("/(unkn %u) ", (unsigned)hdr->reason); 121 if (vflag) 122 printf("[uid %u, pid %u] ", (unsigned)hdr->rule_uid, 123 (unsigned)hdr->rule_pid); 124 125 switch (hdr->action) { 126 case PF_MATCH: 127 printf("match"); 128 break; 129 case PF_SCRUB: 130 printf("scrub"); 131 break; 132 case PF_PASS: 133 printf("pass"); 134 break; 135 case PF_DROP: 136 printf("block"); 137 break; 138 case PF_NAT: 139 case PF_NONAT: 140 printf("nat"); 141 break; 142 case PF_BINAT: 143 case PF_NOBINAT: 144 printf("binat"); 145 break; 146 case PF_RDR: 147 case PF_NORDR: 148 printf("rdr"); 149 break; 150 } 151 printf(" %s on %s: ", 152 hdr->dir == PF_OUT ? "out" : "in", 153 hdr->ifname); 154 if (vflag && hdr->pid != NO_PID) 155 printf("[uid %u, pid %u] ", (unsigned)hdr->uid, 156 (unsigned)hdr->pid); 157 if (vflag && hdr->rewritten) { 158 char buf[48]; 159 160 if (inet_ntop(hdr->af, &hdr->saddr.v4, buf, 161 sizeof(buf)) == NULL) 162 printf("[orig src ?, "); 163 else 164 printf("[orig src %s:%u, ", buf, 165 ntohs(hdr->sport)); 166 if (inet_ntop(hdr->af, &hdr->daddr.v4, buf, 167 sizeof(buf)) == NULL) 168 printf("dst ?] "); 169 else 170 printf("dst %s:%u] ", buf, 171 ntohs(hdr->dport)); 172 } 173 } 174 af = hdr->naf; 175 length -= hdrlen; 176 if (af == AF_INET) { 177 ip = (struct ip *)(p + hdrlen); 178 ip_print((const u_char *)ip, length); 179 if (xflag) 180 default_print((const u_char *)ip, 181 caplen - hdrlen); 182 } else { 183 #ifdef INET6 184 ip6 = (struct ip6_hdr *)(p + hdrlen); 185 ip6_print((const u_char *)ip6, length); 186 if (xflag) 187 default_print((const u_char *)ip6, 188 caplen - hdrlen); 189 #endif 190 } 191 192 out: 193 putchar('\n'); 194 } 195