1 #ifdef HAVE_CONFIG_H 2 #include "config.h" 3 #endif 4 5 #include <tcpdump-stdinc.h> 6 7 #include <stdio.h> 8 #include <pcap.h> 9 10 #include "netdissect.h" 11 #include "interface.h" 12 #include "addrtoname.h" 13 #include "ipnet.h" 14 15 #ifdef DLT_IPNET 16 17 const struct tok ipnet_values[] = { 18 { IPH_AF_INET, "IPv4" }, 19 { IPH_AF_INET6, "IPv6" }, 20 { 0, NULL } 21 }; 22 23 static inline void 24 ipnet_hdr_print(struct netdissect_options *ndo, const u_char *bp, u_int length) 25 { 26 const ipnet_hdr_t *hdr; 27 hdr = (const ipnet_hdr_t *)bp; 28 29 ND_PRINT((ndo, "%d > %d", hdr->iph_zsrc, hdr->iph_zdst)); 30 31 if (!ndo->ndo_qflag) { 32 ND_PRINT((ndo,", family %s (%d)", 33 tok2str(ipnet_values, "Unknown", 34 hdr->iph_family), 35 hdr->iph_family)); 36 } else { 37 ND_PRINT((ndo,", %s", 38 tok2str(ipnet_values, 39 "Unknown Ethertype (0x%04x)", 40 hdr->iph_family))); 41 } 42 43 ND_PRINT((ndo, ", length %u: ", length)); 44 } 45 46 static void 47 ipnet_print(struct netdissect_options *ndo, const u_char *p, u_int length, u_int caplen) 48 { 49 ipnet_hdr_t *hdr; 50 51 if (caplen < sizeof(ipnet_hdr_t)) { 52 ND_PRINT((ndo, "[|ipnet]")); 53 return; 54 } 55 56 if (ndo->ndo_eflag) 57 ipnet_hdr_print(ndo, p, length); 58 59 length -= sizeof(ipnet_hdr_t); 60 caplen -= sizeof(ipnet_hdr_t); 61 hdr = (ipnet_hdr_t *)p; 62 p += sizeof(ipnet_hdr_t); 63 64 switch (hdr->iph_family) { 65 66 case IPH_AF_INET: 67 ip_print(ndo, p, length); 68 break; 69 70 #ifdef INET6 71 case IPH_AF_INET6: 72 ip6_print(ndo, p, length); 73 break; 74 #endif /*INET6*/ 75 76 default: 77 if (!ndo->ndo_eflag) 78 ipnet_hdr_print(ndo, (u_char *)hdr, 79 length + sizeof(ipnet_hdr_t)); 80 81 if (!ndo->ndo_suppress_default_print) 82 ndo->ndo_default_print(ndo, p, caplen); 83 break; 84 } 85 } 86 87 /* 88 * This is the top level routine of the printer. 'p' points 89 * to the ether header of the packet, 'h->ts' is the timestamp, 90 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 91 * is the number of bytes actually captured. 92 */ 93 u_int 94 ipnet_if_print(struct netdissect_options *ndo, 95 const struct pcap_pkthdr *h, const u_char *p) 96 { 97 ipnet_print(ndo, p, h->len, h->caplen); 98 99 return (sizeof(ipnet_hdr_t)); 100 } 101 102 /* 103 * Local Variables: 104 * c-style: whitesmith 105 * c-basic-offset: 8 106 * End: 107 */ 108 109 #endif /* DLT_IPNET */ 110