X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/01c8f1a4de6dc789b96caba9d2c39040360a2e80..ad06a893cfd3acca3fba38d8b39b6b15dd3053ea:/print-udp.c diff --git a/print-udp.c b/print-udp.c index 4f230bce..75d46839 100644 --- a/print-udp.c +++ b/print-udp.c @@ -21,17 +21,14 @@ #ifndef lint static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.102 2001-11-26 06:48:12 itojun Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/tcpdump/print-udp.c,v 1.114 2002-12-13 00:40:34 hannes Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include - -#include +#include #ifdef SEGSIZE #undef SEGSIZE @@ -45,6 +42,7 @@ static const char rcsid[] = #include "interface.h" #include "addrtoname.h" +#include "extract.h" #include "appletalk.h" #include "udp.h" @@ -108,21 +106,21 @@ struct rtcp_rr { #define RTCP_PT_APP 204 static void -vat_print(const void *hdr, u_int len, register const struct udphdr *up) +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)(ntohs(up->uh_ulen) - sizeof(*up)), + (u_int32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up)), ts & 0x3ff, ts >> 10); } else { /* probably vat */ - u_int32_t i0 = (u_int32_t)ntohl(((u_int *)hdr)[0]); - u_int32_t i1 = (u_int32_t)ntohl(((u_int *)hdr)[1]); + 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)(ntohs(up->uh_ulen) - sizeof(*up) - 8), + (u_int32_t)(EXTRACT_16BITS(&up->uh_ulen) - sizeof(*up) - 8), i0 & 0xffff, i1, i0 & 0x800000? "*" : ""); /* audio format */ @@ -139,9 +137,9 @@ 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 = (u_int32_t)ntohl(((u_int *)hdr)[0]); - u_int32_t i1 = (u_int32_t)ntohl(((u_int *)hdr)[1]); - u_int dlen = ntohs(up->uh_ulen) - sizeof(*up) - 8; + 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; @@ -174,7 +172,7 @@ rtp_print(const void *hdr, u_int len, register const struct udphdr *up) i0 & 0xffff, i1); if (vflag) { - printf(" %u", (u_int32_t)ntohl(((u_int *)hdr)[2])); + printf(" %u", EXTRACT_32BITS(&((u_int *)hdr)[2])); if (hasopt) { u_int i2, optlen; do { @@ -218,8 +216,8 @@ rtcp_print(const u_char *hdr, const u_char *ep) printf(" [|rtcp]"); return (ep); } - len = (ntohs(rh->rh_len) + 1) * 4; - flags = ntohs(rh->rh_flags); + 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: @@ -228,16 +226,16 @@ rtcp_print(const u_char *hdr, const u_char *ep) if (len != cnt * sizeof(*rr) + sizeof(*sr) + sizeof(*rh)) printf(" [%d]", len); if (vflag) - printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); + printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); if ((u_char *)(sr + 1) > ep) { printf(" [|rtcp]"); return (ep); } - ts = (double)((u_int32_t)ntohl(sr->sr_ntp.upper)) + - ((double)((u_int32_t)ntohl(sr->sr_ntp.lower)) / + ts = (double)(EXTRACT_32BITS(&sr->sr_ntp.upper)) + + ((double)(EXTRACT_32BITS(&sr->sr_ntp.lower)) / 4294967296.0); - printf(" @%.2f %u %up %ub", ts, (u_int32_t)ntohl(sr->sr_ts), - (u_int32_t)ntohl(sr->sr_np), (u_int32_t)ntohl(sr->sr_nb)); + 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: @@ -246,18 +244,18 @@ rtcp_print(const u_char *hdr, const u_char *ep) printf(" [%d]", len); rr = (struct rtcp_rr *)(rh + 1); if (vflag) - printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); + printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); break; case RTCP_PT_SDES: printf(" sdes %d", len); if (vflag) - printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); + printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); cnt = 0; break; case RTCP_PT_BYE: printf(" bye %d", len); if (vflag) - printf(" %u", (u_int32_t)ntohl(rh->rh_ssrc)); + printf(" %u", EXTRACT_32BITS(&rh->rh_ssrc)); cnt = 0; break; default: @@ -273,13 +271,13 @@ rtcp_print(const u_char *hdr, const u_char *ep) return (ep); } if (vflag) - printf(" %u", (u_int32_t)ntohl(rr->rr_srcid)); - ts = (double)((u_int32_t)ntohl(rr->rr_lsr)) / 65536.; - dts = (double)((u_int32_t)ntohl(rr->rr_dlsr)) / 65536.; + 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", - (u_int32_t)ntohl(rr->rr_nl) & 0x00ffffff, - (u_int32_t)ntohl(rr->rr_ls), - (u_int32_t)ntohl(rr->rr_dv), ts, dts); + EXTRACT_32BITS(&rr->rr_nl) & 0x00ffffff, + EXTRACT_32BITS(&rr->rr_ls), + EXTRACT_32BITS(&rr->rr_dv), ts, dts); } return (hdr + len); } @@ -305,7 +303,10 @@ static int udp_cksum(register const struct ip *ip, phu.ph.mbz = 0; phu.ph.proto = IPPROTO_UDP; memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t)); - memcpy(&phu.ph.dst, &ip->ip_dst.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, @@ -330,7 +331,7 @@ static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up, u_int16_t pa[20]; } phu; - tlen = ntohs(ip6->ip6_plen) + sizeof(struct ip6_hdr) - + tlen = EXTRACT_16BITS(&ip6->ip6_plen) + sizeof(struct ip6_hdr) - ((const char *)up - (const char*)ip6); /* pseudo-header */ @@ -371,6 +372,7 @@ static int udp6_cksum(const struct ip6_hdr *ip6, const struct udphdr *up, #define ISAKMP_PORT 500 /*XXX*/ #define TIMED_PORT 525 /*XXX*/ #define RIP_PORT 520 /*XXX*/ +#define LDP_PORT 646 #define KERBEROS_SEC_PORT 750 /*XXX*/ #define L2TP_PORT 1701 /*XXX*/ #define ISAKMP_PORT_USER1 7500 /*XXX - nonstandard*/ @@ -407,7 +409,7 @@ udpipaddr_print(const struct ip *ip, u_int16_t sport, u_int16_t dport) ip6 = NULL; if (ip6) { - if (dport && ip6->ip6_nxt == IPPROTO_UDP) { + if (ip6->ip6_nxt == IPPROTO_UDP) { (void)printf("%s.%s > %s.%s: ", ip6addr_string(&ip6->ip6_src), udpport_string(sport), @@ -420,7 +422,7 @@ udpipaddr_print(const struct ip *ip, u_int16_t sport, u_int16_t dport) } else #endif /*INET6*/ { - if (dport && ip->ip_p == IPPROTO_UDP) { + if (ip->ip_p == IPPROTO_UDP) { (void)printf("%s.%s > %s.%s: ", ipaddr_string(&ip->ip_src), udpport_string(sport), @@ -458,23 +460,26 @@ udp_print(register const u_char *bp, u_int length, #endif /*INET6*/ cp = (u_char *)(up + 1); if (cp > snapend) { - udpipaddr_print(ip, 0, 0); - (void)printf("[|udp]"); + (void)printf("%s > %s: [|udp]", + ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst)); return; } if (length < sizeof(struct udphdr)) { - udpipaddr_print(ip, 0, 0); - (void)printf("truncated-udp %u", length); + (void)printf("%s > %s: truncated-udp %d", + ipaddr_string(&ip->ip_src), ipaddr_string(&ip->ip_dst), + length); return; } length -= sizeof(struct udphdr); - sport = ntohs(up->uh_sport); - dport = ntohs(up->uh_dport); - ulen = ntohs(up->uh_ulen); + sport = EXTRACT_16BITS(&up->uh_sport); + dport = EXTRACT_16BITS(&up->uh_dport); + ulen = EXTRACT_16BITS(&up->uh_ulen); if (ulen < 8) { - udpipaddr_print(ip, sport, dport); - (void)printf("truncated-udplength %u", ulen); + (void)printf("%s > %s: truncated-udplength %d", + ipaddr_string(&ip->ip_src), + ipaddr_string(&ip->ip_dst), + ulen); return; } if (packettype) { @@ -485,7 +490,7 @@ udp_print(register const u_char *bp, u_int length, case PT_VAT: udpipaddr_print(ip, sport, dport); - vat_print((void *)(up + 1), length, up); + vat_print((void *)(up + 1), up); break; case PT_WB: @@ -495,7 +500,7 @@ udp_print(register const u_char *bp, u_int length, case PT_RPC: rp = (struct rpc_msg *)(up + 1); - direction = (enum msg_type)ntohl(rp->rm_direction); + direction = (enum msg_type)EXTRACT_32BITS(&rp->rm_direction); if (direction == CALL) sunrpcrequest_print((u_char *)rp, length, (u_char *)ip); @@ -522,7 +527,7 @@ udp_print(register const u_char *bp, u_int length, case PT_CNFP: udpipaddr_print(ip, sport, dport); - cnfp_print(cp, length, (const u_char *)ip); + cnfp_print(cp, (const u_char *)ip); break; } return; @@ -534,7 +539,7 @@ udp_print(register const u_char *bp, u_int length, rp = (struct rpc_msg *)(up + 1); if (TTEST(rp->rm_direction)) { - direction = (enum msg_type)ntohl(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); @@ -591,15 +596,14 @@ udp_print(register const u_char *bp, u_int length, if (!qflag) { #define ISPORT(p) (dport == (p) || sport == (p)) - if (ISPORT(NAMESERVER_PORT)) + if (ISPORT(NAMESERVER_PORT) || ISPORT(MULTICASTDNS_PORT)) ns_print((const u_char *)(up + 1), length); else if (ISPORT(TIMED_PORT)) - timed_print((const u_char *)(up + 1), length); + 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, - sport, dport); + bootp_print((const u_char *)(up + 1), sport, dport, length); else if (ISPORT(RIP_PORT)) rip_print((const u_char *)(up + 1), length); else if (ISPORT(ISAKMP_PORT)) @@ -613,27 +617,27 @@ udp_print(register const u_char *bp, u_int 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), length); + 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)) + 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); + 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), length, up); + 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); + /* + * 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); @@ -651,13 +655,15 @@ udp_print(register const u_char *bp, u_int length, cisco_autorp_print((const void *)(up + 1), length); else if (ISPORT(RADIUS_PORT) || ISPORT(RADIUS_NEW_PORT) || - ISPORT(RADIUS_ACCOUNTING_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); + 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 (void)printf("udp %u", (u_int32_t)(ulen - sizeof(*up)));