print-ipnet.c revision 356341 
1/* \summary: Solaris DLT_IPNET printer */
2
3#ifdef HAVE_CONFIG_H
4#include "config.h"
5#endif
6
7#include <netdissect-stdinc.h>
8
9#include "netdissect.h"
10#include "extract.h"
11
12static const char tstr[] = "[|ipnet]";
13
14typedef struct ipnet_hdr {
15	nd_uint8_t	iph_version;
16	nd_uint8_t	iph_family;
17	nd_uint16_t	iph_htype;
18	nd_uint32_t	iph_pktlen;
19	nd_uint32_t	iph_ifindex;
20	nd_uint32_t	iph_grifindex;
21	nd_uint32_t	iph_zsrc;
22	nd_uint32_t	iph_zdst;
23} ipnet_hdr_t;
24
25#define	IPH_AF_INET	2		/* Matches Solaris's AF_INET */
26#define	IPH_AF_INET6	26		/* Matches Solaris's AF_INET6 */
27
28#ifdef DLT_IPNET
29
30static const struct tok ipnet_values[] = {
31	{ IPH_AF_INET,		"IPv4" },
32	{ IPH_AF_INET6,		"IPv6" },
33	{ 0,			NULL }
34};
35
36static inline void
37ipnet_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length)
38{
39	const ipnet_hdr_t *hdr;
40	hdr = (const ipnet_hdr_t *)bp;
41
42	ND_TCHECK(*hdr);
43	ND_PRINT((ndo, "%d > %d", EXTRACT_32BITS(hdr->iph_zsrc),
44		  EXTRACT_32BITS(hdr->iph_zdst)));
45
46	if (!ndo->ndo_qflag) {
47		ND_PRINT((ndo,", family %s (%d)",
48                          tok2str(ipnet_values, "Unknown",
49                                  EXTRACT_8BITS(&hdr->iph_family)),
50                          EXTRACT_8BITS(&hdr->iph_family)));
51        } else {
52		ND_PRINT((ndo,", %s",
53                          tok2str(ipnet_values,
54                                  "Unknown Ethertype (0x%04x)",
55				  EXTRACT_8BITS(&hdr->iph_family))));
56        }
57
58	ND_PRINT((ndo, ", length %u: ", length));
59	return;
60trunc:
61	ND_PRINT((ndo, " %s", tstr));
62}
63
64static void
65ipnet_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
66{
67	const ipnet_hdr_t *hdr;
68
69	if (caplen < sizeof(ipnet_hdr_t))
70		goto trunc;
71
72	if (ndo->ndo_eflag)
73		ipnet_hdr_print(ndo, p, length);
74
75	length -= sizeof(ipnet_hdr_t);
76	caplen -= sizeof(ipnet_hdr_t);
77	hdr = (const ipnet_hdr_t *)p;
78	p += sizeof(ipnet_hdr_t);
79
80	ND_TCHECK2(hdr->iph_family, 1);
81	switch (EXTRACT_8BITS(&hdr->iph_family)) {
82
83	case IPH_AF_INET:
84	        ip_print(ndo, p, length);
85		break;
86
87	case IPH_AF_INET6:
88		ip6_print(ndo, p, length);
89		break;
90
91	default:
92		if (!ndo->ndo_eflag)
93			ipnet_hdr_print(ndo, (const u_char *)hdr,
94					length + sizeof(ipnet_hdr_t));
95
96		if (!ndo->ndo_suppress_default_print)
97			ND_DEFAULTPRINT(p, caplen);
98		break;
99	}
100	return;
101trunc:
102	ND_PRINT((ndo, " %s", tstr));
103}
104
105/*
106 * This is the top level routine of the printer.  'p' points
107 * to the ether header of the packet, 'h->ts' is the timestamp,
108 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
109 * is the number of bytes actually captured.
110 */
111u_int
112ipnet_if_print(netdissect_options *ndo,
113               const struct pcap_pkthdr *h, const u_char *p)
114{
115	ipnet_print(ndo, p, h->len, h->caplen);
116
117	return (sizeof(ipnet_hdr_t));
118}
119
120/*
121 * Local Variables:
122 * c-style: whitesmith
123 * c-basic-offset: 8
124 * End:
125 */
126
127#endif /* DLT_IPNET */
128