X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/5d6a1edd068e89b14f7525f11f992c46e16cfc2f..refs/pull/494/head:/print-udp.c diff --git a/print-udp.c b/print-udp.c index e01cd995..2b63318a 100644 --- a/print-udp.c +++ b/print-udp.c @@ -19,14 +19,13 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#define NETDISSECT_REWORKED #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include +#include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" #include "extract.h" #include "appletalk.h" @@ -34,26 +33,22 @@ #include "udp.h" #include "ip.h" -#ifdef INET6 #include "ip6.h" -#endif #include "ipproto.h" #include "rpc_auth.h" #include "rpc_msg.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 */ + uint16_t rh_flags; /* T:2 P:1 CNT:5 PT:8 */ + uint16_t rh_len; /* length of message (in words) */ + uint32_t rh_ssrc; /* synchronization src id */ }; typedef struct { - u_int32_t upper; /* more significant 32 bits */ - u_int32_t lower; /* less significant 32 bits */ + uint32_t upper; /* more significant 32 bits */ + uint32_t lower; /* less significant 32 bits */ } ntp64; /* @@ -61,9 +56,9 @@ typedef struct { */ 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 */ + uint32_t sr_ts; /* reference media timestamp */ + uint32_t sr_np; /* no. packets sent */ + uint32_t sr_nb; /* no. bytes sent */ }; /* @@ -71,12 +66,12 @@ struct rtcp_sr { * 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 */ + uint32_t rr_srcid; /* sender being reported */ + uint32_t rr_nl; /* no. packets lost */ + uint32_t rr_ls; /* extended last seq number received */ + uint32_t rr_dv; /* jitter (delay variance) */ + uint32_t rr_lsr; /* orig. ts from last rr from this src */ + uint32_t rr_dlsr; /* time from recpt of last rr to xmit time */ }; /*XXX*/ @@ -98,18 +93,18 @@ static void vat_print(netdissect_options *ndo, const void *hdr, register const struct udphdr *up) { /* vat/vt audio */ - u_int ts = *(u_int16_t *)hdr; + u_int ts = EXTRACT_16BITS(hdr); if ((ts & 0xf060) != 0) { /* probably vt */ ND_PRINT((ndo, "udp/vt %u %d / %d", - (u_int32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up)), + (uint32_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]); + uint32_t i0 = EXTRACT_32BITS(&((const u_int *)hdr)[0]); + uint32_t i1 = EXTRACT_32BITS(&((const u_int *)hdr)[1]); ND_PRINT((ndo, "udp/vat %u c%d %u%s", - (u_int32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8), + (uint32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8), i0 & 0xffff, i1, i0 & 0x800000? "*" : "")); /* audio format */ @@ -125,10 +120,10 @@ rtp_print(netdissect_options *ndo, const void *hdr, u_int len, register const struct udphdr *up) { /* rtp v1 or v2 */ - u_int *ip = (u_int *)hdr; + const u_int *ip = (const 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]); + uint32_t i0 = EXTRACT_32BITS(&((const u_int *)hdr)[0]); + uint32_t i1 = EXTRACT_32BITS(&((const u_int *)hdr)[1]); u_int dlen = EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8; const char * ptype; @@ -162,7 +157,7 @@ rtp_print(netdissect_options *ndo, const void *hdr, u_int len, i0 & 0xffff, i1)); if (ndo->ndo_vflag) { - ND_PRINT((ndo, " %u", EXTRACT_32BITS(&((u_int *)hdr)[2]))); + ND_PRINT((ndo, " %u", EXTRACT_32BITS(&((const u_int *)hdr)[2]))); if (hasopt) { u_int i2, optlen; do { @@ -195,14 +190,14 @@ static const u_char * rtcp_print(netdissect_options *ndo, 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; + const struct rtcp_rr *rr = 0; + const struct rtcp_sr *sr; + const struct rtcphdr *rh = (const struct rtcphdr *)hdr; u_int len; - u_int16_t flags; + uint16_t flags; int cnt; double ts, dts; - if ((u_char *)(rh + 1) > ep) { + if ((const u_char *)(rh + 1) > ep) { ND_PRINT((ndo, " [|rtcp]")); return (ep); } @@ -211,13 +206,13 @@ rtcp_print(netdissect_options *ndo, const u_char *hdr, const u_char *ep) cnt = (flags >> 8) & 0x1f; switch (flags & 0xff) { case RTCP_PT_SR: - sr = (struct rtcp_sr *)(rh + 1); + sr = (const struct rtcp_sr *)(rh + 1); ND_PRINT((ndo, " sr")); if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh)) ND_PRINT((ndo, " [%d]", len)); if (ndo->ndo_vflag) ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rh->rh_ssrc))); - if ((u_char *)(sr + 1) > ep) { + if ((const u_char *)(sr + 1) > ep) { ND_PRINT((ndo, " [|rtcp]")); return (ep); } @@ -226,13 +221,13 @@ rtcp_print(netdissect_options *ndo, const u_char *hdr, const u_char *ep) 4294967296.0); ND_PRINT((ndo, " @%.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); + rr = (const struct rtcp_rr *)(sr + 1); break; case RTCP_PT_RR: ND_PRINT((ndo, " rr")); if (len != cnt * sizeof(*rr) + sizeof(*rh)) ND_PRINT((ndo, " [%d]", len)); - rr = (struct rtcp_rr *)(rh + 1); + rr = (const struct rtcp_rr *)(rh + 1); if (ndo->ndo_vflag) ND_PRINT((ndo, " %u", EXTRACT_32BITS(&rh->rh_ssrc))); break; @@ -256,7 +251,7 @@ rtcp_print(netdissect_options *ndo, const u_char *hdr, const u_char *ep) if (cnt > 1) ND_PRINT((ndo, " c%d", cnt)); while (--cnt >= 0) { - if ((u_char *)(rr + 1) > ep) { + if ((const u_char *)(rr + 1) > ep) { ND_PRINT((ndo, " [|rtcp]")); return (ep); } @@ -276,23 +271,20 @@ static int udp_cksum(netdissect_options *ndo, register const struct ip *ip, register const struct udphdr *up, register u_int len) { - return nextproto4_cksum(ndo, ip, (const u_int8_t *)(void *)up, len, len, + return nextproto4_cksum(ndo, ip, (const uint8_t *)(const void *)up, len, len, IPPROTO_UDP); } -#ifdef INET6 static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up, u_int len) { - return nextproto6_cksum(ip6, (const u_int8_t *)(void *)up, len, len, + return nextproto6_cksum(ip6, (const uint8_t *)(const void *)up, len, len, IPPROTO_UDP); } -#endif static void udpipaddr_print(netdissect_options *ndo, const struct ip *ip, int sport, int dport) { -#ifdef INET6 const struct ip6_hdr *ip6; if (IP_V(ip) == 6) @@ -304,42 +296,40 @@ udpipaddr_print(netdissect_options *ndo, const struct ip *ip, int sport, int dpo if (ip6->ip6_nxt == IPPROTO_UDP) { if (sport == -1) { ND_PRINT((ndo, "%s > %s: ", - ip6addr_string(&ip6->ip6_src), - ip6addr_string(&ip6->ip6_dst))); + ip6addr_string(ndo, &ip6->ip6_src), + ip6addr_string(ndo, &ip6->ip6_dst))); } else { ND_PRINT((ndo, "%s.%s > %s.%s: ", - ip6addr_string(&ip6->ip6_src), - udpport_string(sport), - ip6addr_string(&ip6->ip6_dst), - udpport_string(dport))); + ip6addr_string(ndo, &ip6->ip6_src), + udpport_string(ndo, sport), + ip6addr_string(ndo, &ip6->ip6_dst), + udpport_string(ndo, dport))); } } else { if (sport != -1) { ND_PRINT((ndo, "%s > %s: ", - udpport_string(sport), - udpport_string(dport))); + udpport_string(ndo, sport), + udpport_string(ndo, dport))); } } - } else -#endif /*INET6*/ - { + } else { if (ip->ip_p == IPPROTO_UDP) { if (sport == -1) { ND_PRINT((ndo, "%s > %s: ", - ipaddr_string(&ip->ip_src), - ipaddr_string(&ip->ip_dst))); + ipaddr_string(ndo, &ip->ip_src), + ipaddr_string(ndo, &ip->ip_dst))); } else { ND_PRINT((ndo, "%s.%s > %s.%s: ", - ipaddr_string(&ip->ip_src), - udpport_string(sport), - ipaddr_string(&ip->ip_dst), - udpport_string(dport))); + ipaddr_string(ndo, &ip->ip_src), + udpport_string(ndo, sport), + ipaddr_string(ndo, &ip->ip_dst), + udpport_string(ndo, dport))); } } else { if (sport != -1) { ND_PRINT((ndo, "%s > %s: ", - udpport_string(sport), - udpport_string(dport))); + udpport_string(ndo, sport), + udpport_string(ndo, dport))); } } } @@ -353,22 +343,17 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, 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 + uint16_t sport, dport, ulen; register const struct ip6_hdr *ip6; -#endif if (ep > ndo->ndo_snapend) ep = ndo->ndo_snapend; - up = (struct udphdr *)bp; - ip = (struct ip *)bp2; -#ifdef INET6 + up = (const struct udphdr *)bp; + ip = (const struct ip *)bp2; if (IP_V(ip) == 6) - ip6 = (struct ip6_hdr *)bp2; + ip6 = (const struct ip6_hdr *)bp2; else ip6 = NULL; -#endif /*INET6*/ - cp = (u_char *)(up + 1); if (!ND_TTEST(up->uh_dport)) { udpipaddr_print(ndo, ip, -1, -1); ND_PRINT((ndo, "[|udp]")); @@ -383,50 +368,54 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, ND_PRINT((ndo, "truncated-udp %d", length)); return; } + ulen = EXTRACT_16BITS(&up->uh_ulen); + if (ulen < sizeof(struct udphdr)) { + udpipaddr_print(ndo, ip, sport, dport); + ND_PRINT((ndo, "truncated-udplength %d", ulen)); + return; + } + ulen -= sizeof(struct udphdr); length -= sizeof(struct udphdr); + if (ulen < length) + length = ulen; + cp = (const u_char *)(up + 1); if (cp > ndo->ndo_snapend) { udpipaddr_print(ndo, ip, sport, dport); ND_PRINT((ndo, "[|udp]")); return; } - ulen = EXTRACT_16BITS(&up->uh_ulen); - if (ulen < 8) { - udpipaddr_print(ndo, ip, sport, dport); - ND_PRINT((ndo, "truncated-udplength %d", ulen)); - return; - } if (ndo->ndo_packettype) { - register struct sunrpc_msg *rp; + register const struct sunrpc_msg *rp; enum sunrpc_msg_type direction; switch (ndo->ndo_packettype) { case PT_VAT: udpipaddr_print(ndo, ip, sport, dport); - vat_print(ndo, (void *)(up + 1), up); + vat_print(ndo, (const void *)(up + 1), up); break; case PT_WB: udpipaddr_print(ndo, ip, sport, dport); - wb_print(ndo, (void *)(up + 1), length); + wb_print(ndo, (const void *)(up + 1), length); break; case PT_RPC: - rp = (struct sunrpc_msg *)(up + 1); + rp = (const struct sunrpc_msg *)(up + 1); direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction); if (direction == SUNRPC_CALL) - sunrpcrequest_print(ndo, (u_char *)rp, length, - (u_char *)ip); + sunrpcrequest_print(ndo, (const u_char *)rp, length, + (const u_char *)ip); else - nfsreply_print(ndo, (u_char *)rp, length, - (u_char *)ip); /*XXX*/ + nfsreply_print(ndo, (const u_char *)rp, length, + (const u_char *)ip); /*XXX*/ break; case PT_RTP: udpipaddr_print(ndo, ip, sport, dport); - rtp_print(ndo, (void *)(up + 1), length, up); + rtp_print(ndo, (const void *)(up + 1), length, up); break; case PT_RTCP: @@ -442,7 +431,7 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, case PT_CNFP: udpipaddr_print(ndo, ip, sport, dport); - cnfp_print(ndo, cp, (const u_char *)ip); + cnfp_print(ndo, cp); break; case PT_TFTP: @@ -453,11 +442,7 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, case PT_AODV: udpipaddr_print(ndo, ip, sport, dport); aodv_print(ndo, (const u_char *)(up + 1), length, -#ifdef INET6 ip6 != NULL); -#else - 0); -#endif break; case PT_RADIUS: @@ -485,33 +470,33 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, udpipaddr_print(ndo, ip, sport, dport); if (!ndo->ndo_qflag) { - register struct sunrpc_msg *rp; + register const struct sunrpc_msg *rp; enum sunrpc_msg_type direction; - rp = (struct sunrpc_msg *)(up + 1); + rp = (const struct sunrpc_msg *)(up + 1); if (ND_TTEST(rp->rm_direction)) { direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction); if (dport == NFS_PORT && direction == SUNRPC_CALL) { ND_PRINT((ndo, "NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid))); - nfsreq_print_noaddr(ndo, (u_char *)rp, length, - (u_char *)ip); + nfsreq_print_noaddr(ndo, (const u_char *)rp, length, + (const u_char *)ip); return; } if (sport == NFS_PORT && direction == SUNRPC_REPLY) { ND_PRINT((ndo, "NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid))); - nfsreply_print_noaddr(ndo, (u_char *)rp, length, - (u_char *)ip); + nfsreply_print_noaddr(ndo, (const u_char *)rp, length, + (const u_char *)ip); return; } #ifdef notdef if (dport == SUNRPC_PORT && direction == SUNRPC_CALL) { - sunrpcrequest_print((u_char *)rp, length, (u_char *)ip); + sunrpcrequest_print((const u_char *)rp, length, (const u_char *)ip); return; } #endif } - if (ND_TTEST(((struct LAP *)cp)->type) && - ((struct LAP *)cp)->type == lapDDP && + if (ND_TTEST(((const struct LAP *)cp)->type) && + ((const struct LAP *)cp)->type == lapDDP && (atalk_port(sport) || atalk_port(dport))) { if (ndo->ndo_vflag) ND_PRINT((ndo, "kip ")); @@ -522,7 +507,7 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, if (ndo->ndo_vflag && !ndo->ndo_Kflag && !fragmented) { /* Check the checksum, if possible. */ - u_int16_t sum, udp_sum; + uint16_t sum, udp_sum; /* * XXX - do this even if vflag == 1? @@ -543,7 +528,6 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, ND_PRINT((ndo, "[udp sum ok] ")); } } -#ifdef INET6 else if (IP_V(ip) == 6 && ip6->ip6_plen) { /* for IPv6, UDP checksum is mandatory */ if (ND_TTEST2(cp[0], length)) { @@ -558,7 +542,6 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, ND_PRINT((ndo, "[udp sum ok] ")); } } -#endif } if (!ndo->ndo_qflag) { @@ -568,20 +551,16 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, else if (ISPORT(MULTICASTDNS_PORT)) ns_print(ndo, (const u_char *)(up + 1), length, 1); else if (ISPORT(TIMED_PORT)) - timed_print((const u_char *)(up + 1)); + timed_print(ndo, (const u_char *)(up + 1)); else if (ISPORT(TFTP_PORT)) tftp_print(ndo, (const u_char *)(up + 1), length); - else if (ISPORT(IPPORT_BOOTPC) || ISPORT(IPPORT_BOOTPS)) + else if (ISPORT(BOOTPC_PORT) || ISPORT(BOOTPS_PORT)) bootp_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(RIP_PORT)) rip_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(AODV_PORT)) aodv_print(ndo, (const u_char *)(up + 1), length, -#ifdef INET6 ip6 != NULL); -#else - 0); -#endif else if (ISPORT(ISAKMP_PORT)) isakmp_print(ndo, (const u_char *)(up + 1), length, bp2); else if (ISPORT(ISAKMP_PORT_NATT)) @@ -598,11 +577,11 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, krb_print(ndo, (const void *)(up + 1)); else if (ISPORT(L2TP_PORT)) l2tp_print(ndo, (const u_char *)(up + 1), length); -#ifdef TCPDUMP_DO_SMB +#ifdef ENABLE_SMB else if (ISPORT(NETBIOS_NS_PORT)) - nbt_udp137_print((const u_char *)(up + 1), length); + nbt_udp137_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(NETBIOS_DGRAM_PORT)) - nbt_udp138_print((const u_char *)(up + 1), length); + nbt_udp138_print(ndo, (const u_char *)(up + 1), length); #endif else if (dport == VAT_PORT) vat_print(ndo, (const void *)(up + 1), up); @@ -615,8 +594,7 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, else if ((sport >= RX_PORT_LOW && sport <= RX_PORT_HIGH) || (dport >= RX_PORT_LOW && dport <= RX_PORT_HIGH)) rx_print(ndo, (const void *)(up + 1), length, sport, dport, - (u_char *) ip); -#ifdef INET6 + (const u_char *) ip); else if (ISPORT(RIPNG_PORT)) ripng_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(DHCP6_SERV_PORT) || ISPORT(DHCP6_CLI_PORT)) @@ -624,8 +602,7 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, else if (ISPORT(AHCP_PORT)) ahcp_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(BABEL_PORT) || ISPORT(BABEL_PORT_OLD)) - babel_print((const u_char *)(up + 1), length); -#endif /*INET6*/ + babel_print(ndo, (const u_char *)(up + 1), length); /* * Kludge in test for whiteboard packets. */ @@ -636,21 +613,18 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, else if (ISPORT(RADIUS_PORT) || ISPORT(RADIUS_NEW_PORT) || ISPORT(RADIUS_ACCOUNTING_PORT) || - ISPORT(RADIUS_NEW_ACCOUNTING_PORT) ) + ISPORT(RADIUS_NEW_ACCOUNTING_PORT) || + ISPORT(RADIUS_COA_PORT) ) radius_print(ndo, (const u_char *)(up+1), length); else if (dport == HSRP_PORT) hsrp_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(LWRES_PORT)) - lwres_print((const u_char *)(up + 1), length); + lwres_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(LDP_PORT)) ldp_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(OLSR_PORT)) olsr_print(ndo, (const u_char *)(up + 1), length, -#if INET6 (IP_V(ip) == 6) ? 1 : 0); -#else - 0); -#endif else if (ISPORT(MPLS_LSP_PING_PORT)) lspping_print(ndo, (const u_char *)(up + 1), length); else if (dport == BFD_CONTROL_PORT || @@ -669,19 +643,32 @@ udp_print(netdissect_options *ndo, register const u_char *bp, u_int length, else if (ISPORT(LWAPP_DATA_PORT)) lwapp_data_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(SIP_PORT)) - sip_print((const u_char *)(up + 1), length); + sip_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(SYSLOG_PORT)) - syslog_print((const u_char *)(up + 1), length); + syslog_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(OTV_PORT)) otv_print(ndo, (const u_char *)(up + 1), length); else if (ISPORT(VXLAN_PORT)) vxlan_print(ndo, (const u_char *)(up + 1), length); - else - ND_PRINT((ndo, "UDP, length %u", - (u_int32_t)(ulen - sizeof(*up)))); + else if (ISPORT(GENEVE_PORT)) + geneve_print(ndo, (const u_char *)(up + 1), length); + else if (ISPORT(LISP_CONTROL_PORT)) + lisp_print(ndo, (const u_char *)(up + 1), length); + else { + if (ulen > length) + ND_PRINT((ndo, "UDP, bad length %u > %u", + ulen, length)); + else + ND_PRINT((ndo, "UDP, length %u", ulen)); + } #undef ISPORT - } else - ND_PRINT((ndo, "UDP, length %u", (u_int32_t)(ulen - sizeof(*up)))); + } else { + if (ulen > length) + ND_PRINT((ndo, "UDP, bad length %u > %u", + ulen, length)); + else + ND_PRINT((ndo, "UDP, length %u", ulen)); + } }