/* * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * $FreeBSD$ */ #ifndef lint static const char rcsid[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.124.2.5 2003/11/19 00:19:25 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #ifdef SEGSIZE #undef SEGSIZE #endif #include #include #include #include #include "interface.h" #include "addrtoname.h" #include "extract.h" #include "appletalk.h" #include "udp.h" #include "ip.h" #ifdef INET6 #include "ip6.h" #endif #include "ipproto.h" #include "nameser.h" #include "nfs.h" #include "bootp.h" struct rtcphdr { u_int16_t rh_flags; /* T:2 P:1 CNT:5 PT:8 */ u_int16_t rh_len; /* length of message (in words) */ u_int32_t rh_ssrc; /* synchronization src id */ }; typedef struct { u_int32_t upper; /* more significant 32 bits */ u_int32_t lower; /* less significant 32 bits */ } ntp64; /* * Sender report. */ struct rtcp_sr { ntp64 sr_ntp; /* 64-bit ntp timestamp */ u_int32_t sr_ts; /* reference media timestamp */ u_int32_t sr_np; /* no. packets sent */ u_int32_t sr_nb; /* no. bytes sent */ }; /* * Receiver report. * Time stamps are middle 32-bits of ntp timestamp. */ struct rtcp_rr { u_int32_t rr_srcid; /* sender being reported */ u_int32_t rr_nl; /* no. packets lost */ u_int32_t rr_ls; /* extended last seq number received */ u_int32_t rr_dv; /* jitter (delay variance) */ u_int32_t rr_lsr; /* orig. ts from last rr from this src */ u_int32_t rr_dlsr; /* time from recpt of last rr to xmit time */ }; /*XXX*/ #define RTCP_PT_SR 200 #define RTCP_PT_RR 201 #define RTCP_PT_SDES 202 #define RTCP_SDES_CNAME 1 #define RTCP_SDES_NAME 2 #define RTCP_SDES_EMAIL 3 #define RTCP_SDES_PHONE 4 #define RTCP_SDES_LOC 5 #define RTCP_SDES_TOOL 6 #define RTCP_SDES_NOTE 7 #define RTCP_SDES_PRIV 8 #define RTCP_PT_BYE 203 #define RTCP_PT_APP 204 static void vat_print(const void *hdr, register const struct udphdr *up) { /* vat/vt audio */ u_int ts = *(u_int16_t *)hdr; if ((ts & 0xf060) != 0) { /* probably vt */ (void)printf("udp/vt %u %d / %d", (u_int32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up)), ts & 0x3ff, ts >> 10); } else { /* probably vat */ u_int32_t i0 = EXTRACT_32BITS(&((u_int *)hdr)[0]); u_int32_t i1 = EXTRACT_32BITS(&((u_int *)hdr)[1]); printf("udp/vat %u c%d %u%s", (u_int32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8), i0 & 0xffff, i1, i0 & 0x800000? "*" : ""); /* audio format */ if (i0 & 0x1f0000) printf(" f%d", (i0 >> 16) & 0x1f); if (i0 & 0x3f000000) printf(" s%d", (i0 >> 24) & 0x3f); } } static void rtp_print(const void *hdr, u_int len, register const struct udphdr *up) { /* rtp v1 or v2 */ u_int *ip = (u_int *)hdr; u_int hasopt, hasext, contype, hasmarker; u_int32_t i0 = EXTRACT_32BITS(&((u_int *)hdr)[0]); u_int32_t i1 = EXTRACT_32BITS(&((u_int *)hdr)[1]); u_int dlen = EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8; const char * ptype; ip += 2; len >>= 2; len -= 2; hasopt = 0; hasext = 0; if ((i0 >> 30) == 1) { /* rtp v1 */ hasopt = i0 & 0x800000; contype = (i0 >> 16) & 0x3f; hasmarker = i0 & 0x400000; ptype = "rtpv1"; } else { /* rtp v2 */ hasext = i0 & 0x10000000; contype = (i0 >> 16) & 0x7f; hasmarker = i0 & 0x800000; dlen -= 4; ptype = "rtp"; ip += 1; len -= 1; } printf("udp/%s %d c%d %s%s %d %u", ptype, dlen, contype, (hasopt || hasext)? "+" : "", hasmarker? "*" : "", i0 & 0xffff, i1); if (vflag) { printf(" %u", EXTRACT_32BITS(&((u_int *)hdr)[2])); if (hasopt) { u_int i2, optlen; do { i2 = ip[0]; optlen = (i2 >> 16) & 0xff; if (optlen == 0 || optlen > len) { printf(" !opt"); return; } ip += optlen; len -= optlen; } while ((int)i2 >= 0); } if (hasext) { u_int i2, extlen; i2 = ip[0]; extlen = (i2 & 0xffff) + 1; if (extlen > len) { printf(" !ext"); return; } ip += extlen; } if (contype == 0x1f) /*XXX H.261 */ printf(" 0x%04x", ip[0] >> 16); } } static const u_char * rtcp_print(const u_char *hdr, const u_char *ep) { /* rtp v2 control (rtcp) */ struct rtcp_rr *rr = 0; struct rtcp_sr *sr; struct rtcphdr *rh = (struct rtcphdr *)hdr; u_int len; u_int16_t flags; int cnt; double ts, dts; if ((u_char *)(rh + 1) > ep) { printf(" [|rtcp]"); return (ep); } len = (EXTRACT_16BITS(&rh->rh_len) + 1) * 4; flags = EXTRACT_16BITS(&rh->rh_flags); cnt = (flags >> 8) & 0x1f; switch (flags & 0xff) { case RTCP_PT_SR: sr = (struct rtcp_sr *)(rh + 1); printf(" sr"); if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh)) printf(" [%d]", len); if (vflag) printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); if ((u_char *)(sr + 1) > ep) { printf(" [|rtcp]"); return (ep); } ts = (double)(EXTRACT_32BITS(&sr->sr_ntp.upper)) + ((double)(EXTRACT_32BITS(&sr->sr_ntp.lower)) / 4294967296.0); printf(" @%.2f %u %up %ub", ts, EXTRACT_32BITS(&sr->sr_ts), EXTRACT_32BITS(&sr->sr_np), EXTRACT_32BITS(&sr->sr_nb)); rr = (struct rtcp_rr *)(sr + 1); break; case RTCP_PT_RR: printf(" rr"); if (len != cnt * sizeof(*rr) + sizeof(*rh)) printf(" [%d]", len); rr = (struct rtcp_rr *)(rh + 1); if (vflag) printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); break; case RTCP_PT_SDES: printf(" sdes %d", len); if (vflag) printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); cnt = 0; break; case RTCP_PT_BYE: printf(" bye %d", len); if (vflag) printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); cnt = 0; break; default: printf(" type-0x%x %d", flags & 0xff, len); cnt = 0; break; } if (cnt > 1) printf(" c%d", cnt); while (--cnt >= 0) { if ((u_char *)(rr + 1) > ep) { printf(" [|rtcp]"); return (ep); } if (vflag) printf(" %u", EXTRACT_32BITS(&rr->rr_srcid)); ts = (double)(EXTRACT_32BITS(&rr->rr_lsr)) / 65536.; dts = (double)(EXTRACT_32BITS(&rr->rr_dlsr)) / 65536.; printf(" %ul %us %uj @%.2f+%.2f", EXTRACT_32BITS(&rr->rr_nl) & 0x00ffffff, EXTRACT_32BITS(&rr->rr_ls), EXTRACT_32BITS(&rr->rr_dv), ts, dts); } return (hdr + len); } static int udp_cksum(register const struct ip *ip, register const struct udphdr *up, register u_int len) { union phu { struct phdr { u_int32_t src; u_int32_t dst; u_char mbz; u_char proto; u_int16_t len; } ph; u_int16_t pa[6]; } phu; register const u_int16_t *sp; /* pseudo-header.. */ phu.ph.len = htons((u_int16_t)len); phu.ph.mbz = 0; phu.ph.proto = IPPROTO_UDP; memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t)); if (IP_HL(ip) == 5) memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t)); else phu.ph.dst = ip_finddst(ip); sp = &phu.pa[0]; return in_cksum((u_short *)up, len, sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5]); } #ifdef INET6 static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up, u_int len) { size_t i; register const u_int16_t *sp; u_int32_t sum; union { struct { struct in6_addr ph_src; struct in6_addr ph_dst; u_int32_t ph_len; u_int8_t ph_zero[3]; u_int8_t ph_nxt; } ph; u_int16_t pa[20]; } phu; /* pseudo-header */ memset(&phu, 0, sizeof(phu)); phu.ph.ph_src = ip6->ip6_src; phu.ph.ph_dst = ip6->ip6_dst; phu.ph.ph_len = htonl(len); phu.ph.ph_nxt = IPPROTO_UDP; sum = 0; for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++) sum += phu.pa[i]; sp = (const u_int16_t *)up; for (i = 0; i < (len & ~1); i += 2) sum += *sp++; if (len & 1) sum += htons((*(const u_int8_t *)sp) << 8); while (sum > 0xffff) sum = (sum & 0xffff) + (sum >> 16); sum = ~sum & 0xffff; return (sum); } #endif static void udpipaddr_print(const struct ip *ip, int sport, int dport) { #ifdef INET6 const struct ip6_hdr *ip6; if (IP_V(ip) == 6) ip6 = (const struct ip6_hdr *)ip; else ip6 = NULL; if (ip6) { if (ip6->ip6_nxt == IPPROTO_UDP) { if (sport == -1) { (void)printf("%s > %s: ", ip6addr_string(&ip6->ip6_src), ip6addr_string(&ip6->ip6_dst)); } else { (void)printf("%s.%s > %s.%s: ", ip6addr_string(&ip6->ip6_src), udpport_string(sport), ip6addr_string(&ip6->ip6_dst), udpport_string(dport)); } } else { if (sport != -1) { (void)printf("%s > %s: ", udpport_string(sport), udpport_string(dport)); } } } else #endif /*INET6*/ { if (ip->ip_p == IPPROTO_UDP) { if (sport == -1) { (void)printf("%s > %s: ", ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst)); } else { (void)printf("%s.%s > %s.%s: ", ipaddr_string(&ip->ip_src), udpport_string(sport), ipaddr_string(&ip->ip_dst), udpport_string(dport)); } } else { if (sport != -1) { (void)printf("%s > %s: ", udpport_string(sport), udpport_string(dport)); } } } } void udp_print(register const u_char *bp, u_int length, register const u_char *bp2, int fragmented) { register const struct udphdr *up; register const struct ip *ip; register const u_char *cp; register const u_char *ep = bp + length; u_int16_t sport, dport, ulen; #ifdef INET6 register const struct ip6_hdr *ip6; #endif if (ep > snapend) ep = snapend; up = (struct udphdr *)bp; ip = (struct ip *)bp2; #ifdef INET6 if (IP_V(ip) == 6) ip6 = (struct ip6_hdr *)bp2; else ip6 = NULL; #endif /*INET6*/ cp = (u_char *)(up + 1); if (!TTEST(up->uh_dport)) { udpipaddr_print(ip, -1, -1); (void)printf("[|udp]"); return; } sport = EXTRACT_16BITS(&up->uh_sport); dport = EXTRACT_16BITS(&up->uh_dport); if (length < sizeof(struct udphdr)) { udpipaddr_print(ip, sport, dport); (void)printf("truncated-udp %d", length); return; } length -= sizeof(struct udphdr); if (cp > snapend) { udpipaddr_print(ip, sport, dport); (void)printf("[|udp]"); return; } ulen = EXTRACT_16BITS(&up->uh_ulen); if (ulen < 8) { udpipaddr_print(ip, sport, dport); (void)printf("truncated-udplength %d", ulen); return; } if (packettype) { register struct rpc_msg *rp; enum msg_type direction; switch (packettype) { case PT_VAT: udpipaddr_print(ip, sport, dport); vat_print((void *)(up + 1), up); break; case PT_WB: udpipaddr_print(ip, sport, dport); wb_print((void *)(up + 1), length); break; case PT_RPC: rp = (struct rpc_msg *)(up + 1); direction = (enum msg_type)EXTRACT_32BITS(&rp->rm_direction); if (direction == CALL) sunrpcrequest_print((u_char *)rp, length, (u_char *)ip); else nfsreply_print((u_char *)rp, length, (u_char *)ip); /*XXX*/ break; case PT_RTP: udpipaddr_print(ip, sport, dport); rtp_print((void *)(up + 1), length, up); break; case PT_RTCP: udpipaddr_print(ip, sport, dport); while (cp < ep) cp = rtcp_print(cp, ep); break; case PT_SNMP: udpipaddr_print(ip, sport, dport); snmp_print((const u_char *)(up + 1), length); break; case PT_CNFP: udpipaddr_print(ip, sport, dport); cnfp_print(cp, (const u_char *)ip); break; case PT_TFTP: udpipaddr_print(ip, sport, dport); tftp_print(cp, length); break; case PT_AODV: udpipaddr_print(ip, sport, dport); aodv_print((const u_char *)(up + 1), length, #ifdef INET6 ip6 != NULL); #else FALSE); #endif break; } return; } if (!qflag) { register struct rpc_msg *rp; enum msg_type direction; rp = (struct rpc_msg *)(up + 1); if (TTEST(rp->rm_direction)) { direction = (enum msg_type)EXTRACT_32BITS(&rp->rm_direction); if (dport == NFS_PORT && direction == CALL) { nfsreq_print((u_char *)rp, length, (u_char *)ip); return; } if (sport == NFS_PORT && direction == REPLY) { nfsreply_print((u_char *)rp, length, (u_char *)ip); return; } #ifdef notdef if (dport == SUNRPC_PORT && direction == CALL) { sunrpcrequest_print((u_char *)rp, length, (u_char *)ip); return; } #endif } if (TTEST(((struct LAP *)cp)->type) && ((struct LAP *)cp)->type == lapDDP && (atalk_port(sport) || atalk_port(dport))) { if (vflag) fputs("kip ", stdout); llap_print(cp, length); return; } } udpipaddr_print(ip, sport, dport); if (IP_V(ip) == 4 && vflag && !fragmented) { int sum = up->uh_sum; if (sum == 0) { (void)printf("[no cksum] "); } else if (TTEST2(cp[0], length)) { sum = udp_cksum(ip, up, length + sizeof(struct udphdr)); if (sum != 0) (void)printf("[bad udp cksum %x!] ", sum); else (void)printf("[udp sum ok] "); } } #ifdef INET6 if (IP_V(ip) == 6 && ip6->ip6_plen && vflag && !fragmented) { int sum = up->uh_sum; /* for IPv6, UDP checksum is mandatory */ if (TTEST2(cp[0], length)) { sum = udp6_cksum(ip6, up, length + sizeof(struct udphdr)); if (sum != 0) (void)printf("[bad udp cksum %x!] ", sum); else (void)printf("[udp sum ok] "); } } #endif if (!qflag) { #define ISPORT(p) (dport == (p) || sport == (p)) if (ISPORT(NAMESERVER_PORT)) ns_print((const u_char *)(up + 1), length, 0); else if (ISPORT(MULTICASTDNS_PORT)) ns_print((const u_char *)(up + 1), length, 1); else if (ISPORT(TIMED_PORT)) timed_print((const u_char *)(up + 1)); else if (ISPORT(TFTP_PORT)) tftp_print((const u_char *)(up + 1), length); else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS)) bootp_print((const u_char *)(up + 1), length); else if (ISPORT(RIP_PORT)) rip_print((const u_char *)(up + 1), length); else if (ISPORT(AODV_PORT)) aodv_print((const u_char *)(up + 1), length, #ifdef INET6 ip6 != NULL); #else FALSE); #endif else if (ISPORT(ISAKMP_PORT)) isakmp_print((const u_char *)(up + 1), length, bp2); #if 1 /*???*/ else if (ISPORT(ISAKMP_PORT_USER1) || ISPORT(ISAKMP_PORT_USER2)) isakmp_print((const u_char *)(up + 1), length, bp2); #endif else if (ISPORT(SNMP_PORT) || ISPORT(SNMPTRAP_PORT)) snmp_print((const u_char *)(up + 1), length); else if (ISPORT(NTP_PORT)) ntp_print((const u_char *)(up + 1), length); else if (ISPORT(KERBEROS_PORT) || ISPORT(KERBEROS_SEC_PORT)) krb_print((const void *)(up + 1)); else if (ISPORT(L2TP_PORT)) l2tp_print((const u_char *)(up + 1), length); #ifdef TCPDUMP_DO_SMB else if (ISPORT(NETBIOS_NS_PORT)) nbt_udp137_print((const u_char *)(up + 1), length); else if (ISPORT(NETBIOS_DGRAM_PORT)) nbt_udp138_print((const u_char *)(up + 1), length); #endif else if (dport == 3456) vat_print((const void *)(up + 1), up); else if (ISPORT(ZEPHYR_SRV_PORT) || ISPORT(ZEPHYR_CLT_PORT)) zephyr_print((const void *)(up + 1), length); /* * Since there are 10 possible ports to check, I think * a <> test would be more efficient */ else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) || (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH)) rx_print((const void *)(up + 1), length, sport, dport, (u_char *) ip); #ifdef INET6 else if (ISPORT(RIPNG_PORT)) ripng_print((const u_char *)(up + 1), length); else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) { dhcp6_print((const u_char *)(up + 1), length); } #endif /*INET6*/ /* * Kludge in test for whiteboard packets. */ else if (dport == 4567) wb_print((const void *)(up + 1), length); else if (ISPORT(CISCO_AUTORP_PORT)) cisco_autorp_print((const void *)(up + 1), length); else if (ISPORT(RADIUS_PORT) || ISPORT(RADIUS_NEW_PORT) || ISPORT(RADIUS_ACCOUNTING_PORT) || ISPORT(RADIUS_NEW_ACCOUNTING_PORT) ) radius_print((const u_char *)(up+1), length); else if (dport == HSRP_PORT) hsrp_print((const u_char *)(up + 1), length); else if (ISPORT(LWRES_PORT)) lwres_print((const u_char *)(up + 1), length); else if (ISPORT(LDP_PORT)) ldp_print((const u_char *)(up + 1), length); else if (ISPORT(MPLS_LSP_PING_PORT)) mpls_lsp_ping_print((const u_char *)(up + 1), length); else if (dport == BFD_CONTROL_PORT || dport == BFD_ECHO_PORT ) bfd_print((const u_char *)(up+1), length, dport); else (void)printf("UDP, length: %u", (u_int32_t)(ulen - sizeof(*up))); #undef ISPORT } else (void)printf("UDP, length: %u", (u_int32_t)(ulen - sizeof(*up))); }