X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/4189fb7df651e5742b15488d2f59dae5f526e82b..refs/heads/tcpdump-3.9:/print-ip.c diff --git a/print-ip.c b/print-ip.c index 84465326..19648959 100644 --- a/print-ip.c +++ b/print-ip.c @@ -21,7 +21,7 @@ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.148 2005-04-06 21:33:02 mcr Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.149.2.9 2007-09-14 01:30:02 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H @@ -50,6 +50,7 @@ struct tok ip_option_values[] = { { IPOPT_SSRR, "SSRR" }, { IPOPT_LSRR, "LSRR" }, { IPOPT_RA, "RA" }, + { IPOPT_RFC1393, "traceroute" }, { 0, NULL } }; @@ -73,9 +74,9 @@ ip_printroute(register const u_char *cp, u_int length) printf(" [bad ptr %u]", cp[2]); for (len = 3; len < length; len += 4) { - printf("%s", ipaddr_string(&cp[len])); + printf(" %s", ipaddr_string(&cp[len])); if (ptr > len) - printf (", "); + printf(","); } } @@ -137,17 +138,17 @@ ip_printts(register const u_char *cp, u_int length) const char *type; if (length < 4) { - printf("[bad length %d]", length); + printf("[bad length %u]", length); return; } printf(" TS{"); hoplen = ((cp[3]&0xF) != IPOPT_TS_TSONLY) ? 8 : 4; if ((length - 4) & (hoplen-1)) - printf("[bad length %d]", length); + printf("[bad length %u]", length); ptr = cp[2] - 1; len = 0; if (ptr < 4 || ((ptr - 4) & (hoplen-1)) || ptr > length + 1) - printf("[bad ptr %d]", cp[2]); + printf("[bad ptr %u]", cp[2]); switch (cp[3]&0xF) { case IPOPT_TS_TSONLY: printf("TSONLY"); @@ -197,29 +198,37 @@ static void ip_optprint(register const u_char *cp, u_int length) { register u_int option_len; + const char *sep = ""; for (; length > 0; cp += option_len, length -= option_len) { u_int option_code; + printf("%s", sep); + sep = ","; + TCHECK(*cp); option_code = *cp; + printf("%s", + tok2str(ip_option_values,"unknown %u",option_code)); + if (option_code == IPOPT_NOP || option_code == IPOPT_EOL) option_len = 1; else { TCHECK(cp[1]); - option_len = cp[1]; + option_len = cp[1]; + if (option_len < 2) { + printf(" [bad length %u]", option_len); + return; + } } - printf("%s (%u) len %u", - tok2str(ip_option_values,"unknown",option_code), - option_code, - option_len); - - if (option_len < 2) - return; + if (option_len > length) { + printf(" [bad length %u]", option_len); + return; + } TCHECK2(*cp, option_len); @@ -234,13 +243,17 @@ ip_optprint(register const u_char *cp, u_int length) case IPOPT_RR: /* fall through */ case IPOPT_SSRR: case IPOPT_LSRR: - ip_printroute( cp, option_len); + ip_printroute(cp, option_len); break; case IPOPT_RA: + if (option_len < 4) { + printf(" [bad length %u]", option_len); + break; + } TCHECK(cp[3]); if (EXTRACT_16BITS(&cp[2]) != 0) - printf("value %u", EXTRACT_16BITS(&cp[2])); + printf(" value %u", EXTRACT_16BITS(&cp[2])); break; case IPOPT_NOP: /* nothing to print - fall through */ @@ -341,12 +354,6 @@ in_cksum_shouldbe(u_int16_t sum, u_int16_t computed_sum) return shouldbe; } -#ifndef IP_MF -#define IP_MF 0x2000 -#endif /* IP_MF */ -#ifndef IP_DF -#define IP_DF 0x4000 -#endif /* IP_DF */ #define IP_RES 0x8000 static struct tok ip_frag_values[] = { @@ -359,7 +366,7 @@ static struct tok ip_frag_values[] = { struct ip_print_demux_state { const struct ip *ip; const u_char *cp; - u_int hlen, len, off; + u_int len, off; u_char nh; int advance; }; @@ -411,21 +418,27 @@ again: case IPPROTO_SCTP: sctp_print(ipds->cp, (const u_char *)ipds->ip, ipds->len); break; + + case IPPROTO_DCCP: + dccp_print(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(ipds->cp, ipds->len, (const u_char *)ipds->ip, - (ipds->off &~ 0x6000)); + ipds->off & (IP_MF|IP_OFFMASK)); break; case IPPROTO_UDP: + /* pass on the MF bit plus the offset to detect fragments */ udp_print(ipds->cp, ipds->len, (const u_char *)ipds->ip, - (ipds->off &~ 0x6000)); + ipds->off & (IP_MF|IP_OFFMASK)); break; case IPPROTO_ICMP: /* pass on the MF bit plus the offset to detect fragments */ icmp_print(ipds->cp, ipds->len, (const u_char *)ipds->ip, - (ipds->off & 0x3fff)); + ipds->off & (IP_MF|IP_OFFMASK)); break; case IPPROTO_PIGP: @@ -502,6 +515,10 @@ again: vrrp_print(ipds->cp, ipds->len, ipds->ip->ip_ttl); break; + case IPPROTO_PGM: + pgm_print(ipds->cp, ipds->len, (const u_char *)ipds->ip); + break; + default: if ((proto = getprotobynumber(ipds->nh)) != NULL) ND_PRINT((ndo, " %s", proto->p_name)); @@ -512,6 +529,24 @@ again: } } +void +ip_print_inner(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); +} + /* * print an IP datagram. @@ -524,6 +559,7 @@ ip_print(netdissect_options *ndo, struct ip_print_demux_state ipd; struct ip_print_demux_state *ipds=&ipd; const u_char *ipend; + u_int hlen; u_int16_t sum, ip_sum; struct protoent *proto; @@ -544,9 +580,9 @@ ip_print(netdissect_options *ndo, (void)printf("truncated-ip %u", length); return; } - ipds->hlen = IP_HL(ipds->ip) * 4; - if (ipds->hlen < sizeof (struct ip)) { - (void)printf("bad-hlen %u", ipds->hlen); + hlen = IP_HL(ipds->ip) * 4; + if (hlen < sizeof (struct ip)) { + (void)printf("bad-hlen %u", hlen); return; } @@ -554,7 +590,7 @@ ip_print(netdissect_options *ndo, if (length < ipds->len) (void)printf("truncated-ip - %u bytes missing! ", ipds->len - length); - if (ipds->len < ipds->hlen) { + if (ipds->len < hlen) { #ifdef GUESS_TSO if (ipds->len) { (void)printf("bad-len %u", ipds->len); @@ -577,7 +613,7 @@ ip_print(netdissect_options *ndo, if (ipend < snapend) snapend = ipend; - ipds->len -= ipds->hlen; + ipds->len -= hlen; ipds->off = EXTRACT_16BITS(&ipds->ip->ip_off); @@ -598,7 +634,7 @@ ip_print(netdissect_options *ndo, } if (ipds->ip->ip_ttl >= 1) - (void)printf(", ttl %3u", ipds->ip->ip_ttl); + (void)printf(", ttl %u", ipds->ip->ip_ttl); /* * for the firewall guys, print id, offset. @@ -606,23 +642,23 @@ ip_print(netdissect_options *ndo, * For unfragmented datagrams, note the don't fragment flag. */ - (void)printf(", id %u, offset %u, flags [%s], proto: %s (%u)", + (void)printf(", id %u, offset %u, flags [%s], proto %s (%u)", EXTRACT_16BITS(&ipds->ip->ip_id), (ipds->off & 0x1fff) * 8, - bittok2str(ip_frag_values, "none", ipds->off&0xe000 ), + bittok2str(ip_frag_values, "none", ipds->off&0xe000), tok2str(ipproto_values,"unknown",ipds->ip->ip_p), ipds->ip->ip_p); - (void)printf(", length: %u", EXTRACT_16BITS(&ipds->ip->ip_len)); + (void)printf(", length %u", EXTRACT_16BITS(&ipds->ip->ip_len)); - if ((ipds->hlen - sizeof(struct ip)) > 0) { - printf(", options ( "); - ip_optprint((u_char *)(ipds->ip + 1), ipds->hlen - sizeof(struct ip)); - printf(" )"); + if ((hlen - sizeof(struct ip)) > 0) { + printf(", options ("); + ip_optprint((u_char *)(ipds->ip + 1), hlen - sizeof(struct ip)); + printf(")"); } - if ((u_char *)ipds->ip + ipds->hlen <= snapend) { - sum = in_cksum((const u_short *)ipds->ip, ipds->hlen, 0); + if ((u_char *)ipds->ip + hlen <= snapend) { + sum = in_cksum((const u_short *)ipds->ip, hlen, 0); if (sum != 0) { ip_sum = EXTRACT_16BITS(&ipds->ip->ip_sum); (void)printf(", bad cksum %x (->%x)!", ip_sum, @@ -638,11 +674,11 @@ ip_print(netdissect_options *ndo, * level protocol. */ if ((ipds->off & 0x1fff) == 0) { - ipds->cp = (const u_char *)ipds->ip + ipds->hlen; + ipds->cp = (const u_char *)ipds->ip + hlen; ipds->nh = ipds->ip->ip_p; if (ipds->nh != IPPROTO_TCP && ipds->nh != IPPROTO_UDP && - ipds->nh != IPPROTO_SCTP) { + ipds->nh != IPPROTO_SCTP && ipds->nh != IPPROTO_DCCP) { (void)printf("%s > %s: ", ipaddr_string(&ipds->ip->ip_src), ipaddr_string(&ipds->ip->ip_dst)); @@ -694,5 +730,11 @@ ipN_print(register const u_char *bp, register u_int length) } } +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 8 + * End: + */