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1 office 1 #define NETDISSECT_REWORKED
2 #ifdef HAVE_CONFIG_H
3 #include "config.h"
4 #endif
5  
6 #include <tcpdump-stdinc.h>
7  
8 #include "interface.h"
9  
10 typedef struct ipnet_hdr {
11 uint8_t iph_version;
12 uint8_t iph_family;
13 uint16_t iph_htype;
14 uint32_t iph_pktlen;
15 uint32_t iph_ifindex;
16 uint32_t iph_grifindex;
17 uint32_t iph_zsrc;
18 uint32_t iph_zdst;
19 } ipnet_hdr_t;
20  
21 #define IPH_AF_INET 2 /* Matches Solaris's AF_INET */
22 #define IPH_AF_INET6 26 /* Matches Solaris's AF_INET6 */
23  
24 #ifdef DLT_IPNET
25  
26 static const struct tok ipnet_values[] = {
27 { IPH_AF_INET, "IPv4" },
28 { IPH_AF_INET6, "IPv6" },
29 { 0, NULL }
30 };
31  
32 static inline void
33 ipnet_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
34 {
35 const ipnet_hdr_t *hdr;
36 hdr = (const ipnet_hdr_t *)bp;
37  
38 ND_PRINT((ndo, "%d > %d", hdr->iph_zsrc, hdr->iph_zdst));
39  
40 if (!ndo->ndo_qflag) {
41 ND_PRINT((ndo,", family %s (%d)",
42 tok2str(ipnet_values, "Unknown",
43 hdr->iph_family),
44 hdr->iph_family));
45 } else {
46 ND_PRINT((ndo,", %s",
47 tok2str(ipnet_values,
48 "Unknown Ethertype (0x%04x)",
49 hdr->iph_family)));
50 }
51  
52 ND_PRINT((ndo, ", length %u: ", length));
53 }
54  
55 static void
56 ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
57 {
58 ipnet_hdr_t *hdr;
59  
60 if (caplen < sizeof(ipnet_hdr_t)) {
61 ND_PRINT((ndo, "[|ipnet]"));
62 return;
63 }
64  
65 if (ndo->ndo_eflag)
66 ipnet_hdr_print(ndo, p, length);
67  
68 length -= sizeof(ipnet_hdr_t);
69 caplen -= sizeof(ipnet_hdr_t);
70 hdr = (ipnet_hdr_t *)p;
71 p += sizeof(ipnet_hdr_t);
72  
73 switch (hdr->iph_family) {
74  
75 case IPH_AF_INET:
76 ip_print(ndo, p, length);
77 break;
78  
79 case IPH_AF_INET6:
80 ip6_print(ndo, p, length);
81 break;
82  
83 default:
84 if (!ndo->ndo_eflag)
85 ipnet_hdr_print(ndo, (u_char *)hdr,
86 length + sizeof(ipnet_hdr_t));
87  
88 if (!ndo->ndo_suppress_default_print)
89 ND_DEFAULTPRINT(p, caplen);
90 break;
91 }
92 }
93  
94 /*
95 * This is the top level routine of the printer. 'p' points
96 * to the ether header of the packet, 'h->ts' is the timestamp,
97 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
98 * is the number of bytes actually captured.
99 */
100 u_int
101 ipnet_if_print(netdissect_options *ndo,
102 const struct pcap_pkthdr *h, const u_char *p)
103 {
104 ipnet_print(ndo, p, h->len, h->caplen);
105  
106 return (sizeof(ipnet_hdr_t));
107 }
108  
109 /*
110 * Local Variables:
111 * c-style: whitesmith
112 * c-basic-offset: 8
113 * End:
114 */
115  
116 #endif /* DLT_IPNET */