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 static const struct tok ipnet_values[] = {
18 { IPH_AF_INET, "IPv4" },
19 { IPH_AF_INET6, "IPv6" },
20 { 0, NULL }
21 };
22
23 static inline void
ipnet_hdr_print(struct netdissect_options * ndo,const u_char * bp,u_int length)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
ipnet_print(struct netdissect_options * ndo,const u_char * p,u_int length,u_int caplen)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
ipnet_if_print(struct netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)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