-struct ip_print_demux_state {
- const struct ip *ip;
- const u_char *cp;
- u_int len, off;
- u_char nh;
- int advance;
-};
-
-static void
-ip_print_demux(netdissect_options *ndo,
- struct ip_print_demux_state *ipds)
-{
- const char *p_name;
-
-again:
- switch (ipds->nh) {
-
- case IPPROTO_AH:
- if (!ND_TTEST_1(ipds->cp)) {
- ndo->ndo_protocol = "ah";
- nd_print_trunc(ndo);
- break;
- }
- ipds->nh = EXTRACT_U_1(ipds->cp);
- ipds->advance = ah_print(ndo, ipds->cp);
- if (ipds->advance <= 0)
- break;
- ipds->cp += ipds->advance;
- ipds->len -= ipds->advance;
- goto again;
-
- case IPPROTO_ESP:
- {
- u_int enh, padlen;
- ipds->advance = esp_print(ndo, ipds->cp, ipds->len,
- (const u_char *)ipds->ip,
- &enh, &padlen);
- if (ipds->advance <= 0)
- break;
- ipds->cp += ipds->advance;
- ipds->len -= ipds->advance + padlen;
- ipds->nh = enh & 0xff;
- goto again;
- }
-
- case IPPROTO_IPCOMP:
- {
- ipcomp_print(ndo, ipds->cp);
- /*
- * Either this has decompressed the payload and
- * printed it, in which case there's nothing more
- * to do, or it hasn't, in which case there's
- * nothing more to do.
- */
- break;
- }
-
- case IPPROTO_SCTP:
- sctp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
- break;
-
- case IPPROTO_DCCP:
- dccp_print(ndo, ipds->cp, (const u_char *)ipds->ip, ipds->len);
- break;
-
- case IPPROTO_TCP:
- /* pass on the MF bit plus the offset to detect fragments */
- tcp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
- ipds->off & (IP_MF|IP_OFFMASK));
- break;
-
- case IPPROTO_UDP:
- /* pass on the MF bit plus the offset to detect fragments */
- udp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
- ipds->off & (IP_MF|IP_OFFMASK));
- break;
-
- case IPPROTO_ICMP:
- /* pass on the MF bit plus the offset to detect fragments */
- icmp_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip,
- ipds->off & (IP_MF|IP_OFFMASK));
- break;
-
- case IPPROTO_PIGP:
- /*
- * XXX - the current IANA protocol number assignments
- * page lists 9 as "any private interior gateway
- * (used by Cisco for their IGRP)" and 88 as
- * "EIGRP" from Cisco.
- *
- * Recent BSD <netinet/in.h> headers define
- * IP_PROTO_PIGP as 9 and IP_PROTO_IGRP as 88.
- * We define IP_PROTO_PIGP as 9 and
- * IP_PROTO_EIGRP as 88; those names better
- * match was the current protocol number
- * assignments say.
- */
- igrp_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_EIGRP:
- eigrp_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_ND:
- ND_PRINT(" nd %u", ipds->len);
- break;
-
- case IPPROTO_EGP:
- egp_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_OSPF:
- ospf_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
- break;
-
- case IPPROTO_IGMP:
- igmp_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_IPV4:
- /* DVMRP multicast tunnel (ip-in-ip encapsulation) */
- ip_print(ndo, ipds->cp, ipds->len);
- if (! ndo->ndo_vflag) {
- ND_PRINT(" (ipip-proto-4)");
- return;
- }
- break;
-
- case IPPROTO_IPV6:
- /* ip6-in-ip encapsulation */
- ip6_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_RSVP:
- rsvp_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_GRE:
- /* do it */
- gre_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_MOBILE:
- mobile_print(ndo, ipds->cp, ipds->len);
- break;
-
- case IPPROTO_PIM:
- pim_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
- break;
-
- case IPPROTO_VRRP:
- if (ndo->ndo_packettype == PT_CARP) {
- if (ndo->ndo_vflag)
- ND_PRINT("carp %s > %s: ",
- ipaddr_string(ndo, ipds->ip->ip_src),
- ipaddr_string(ndo, ipds->ip->ip_dst));
- carp_print(ndo, ipds->cp, ipds->len,
- EXTRACT_U_1(ipds->ip->ip_ttl));
- } else {
- if (ndo->ndo_vflag)
- ND_PRINT("vrrp %s > %s: ",
- ipaddr_string(ndo, ipds->ip->ip_src),
- ipaddr_string(ndo, ipds->ip->ip_dst));
- vrrp_print(ndo, ipds->cp, ipds->len,
- (const u_char *)ipds->ip,
- EXTRACT_U_1(ipds->ip->ip_ttl));
- }
- break;
-
- case IPPROTO_PGM:
- pgm_print(ndo, ipds->cp, ipds->len, (const u_char *)ipds->ip);
- break;
-
- default:
- if (ndo->ndo_nflag==0 && (p_name = netdb_protoname(ipds->nh)) != NULL)
- ND_PRINT(" %s", p_name);
- else
- ND_PRINT(" ip-proto-%u", ipds->nh);
- ND_PRINT(" %u", ipds->len);
- break;
- }
-}
-
-void
-ip_inner_print(netdissect_options *ndo,
- const u_char *bp,
- u_int length, u_int nh,
- const u_char *bp2)
-{
- struct ip_print_demux_state ipd;
-
- ipd.ip = (const struct ip *)bp2;
- ipd.cp = bp;
- ipd.len = length;
- ipd.off = 0;
- ipd.nh = nh;
- ipd.advance = 0;
-
- ip_print_demux(ndo, &ipd);
-}
-
projects / tcpdump / blobdiff