X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/535dd007b3ecf5d21eacba2bf559f1012c709da8..47fc89d711eec0a073d9b3b293a1af901b5bd791:/print-atalk.c diff --git a/print-atalk.c b/print-atalk.c index fd75f756..7546543b 100644 --- a/print-atalk.c +++ b/print-atalk.c @@ -21,38 +21,26 @@ * Format and print AppleTalk packets. */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-atalk.c,v 1.60 2000-10-05 04:10:01 itojun Exp $ (LBL)"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include -#include - -#if __STDC__ -struct mbuf; -struct rtentry; -#endif - -#include +#include #include #include #include +#include #include "interface.h" #include "addrtoname.h" #include "ethertype.h" #include "extract.h" /* must come after interface.h */ #include "appletalk.h" -#include "savestr.h" -static struct tok type2str[] = { +static const char tstr[] = "[|atalk]"; + +static const struct tok type2str[] = { { ddpRTMP, "rtmp" }, { ddpRTMPrequest, "rtmpReq" }, { ddpECHO, "echo" }, @@ -72,8 +60,6 @@ struct aarp { u_int8_t pdaddr[4]; }; -static char tstr[] = "[|atalk]"; - static void atp_print(const struct atATP *, u_int); static void atp_bitmap_print(u_char); static void nbp_print(const struct atNBP *, u_int, u_short, u_char, u_char); @@ -88,25 +74,40 @@ static void ddp_print(const u_char *, u_int, int, u_short, u_char, u_char); static const char *ddpskt_string(int); /* - * Print AppleTalk Datagram Delivery Protocol packets. + * Print LLAP packets received on a physical LocalTalk interface. */ -void -atalk_print(register const u_char *bp, u_int length) +u_int +ltalk_if_print(const struct pcap_pkthdr *h, const u_char *p) +{ + return (llap_print(p, h->caplen)); +} + +/* + * Print AppleTalk LLAP packets. + */ +u_int +llap_print(register const u_char *bp, u_int length) { register const struct LAP *lp; register const struct atDDP *dp; register const struct atShortDDP *sdp; u_short snet; + u_int hdrlen; - lp = (struct LAP *)bp; + if (length < sizeof(*lp)) { + (void)printf(" [|llap %u]", length); + return (length); + } + lp = (const struct LAP *)bp; bp += sizeof(*lp); length -= sizeof(*lp); + hdrlen = sizeof(*lp); switch (lp->type) { case lapShortDDP: if (length < ddpSSize) { - (void)printf(" [|sddp %d]", length); - return; + (void)printf(" [|sddp %u]", length); + return (length); } sdp = (const struct atShortDDP *)bp; printf("%s.%s", @@ -115,13 +116,14 @@ atalk_print(register const u_char *bp, u_int length) ataddr_string(0, lp->dst), ddpskt_string(sdp->dstSkt)); bp += ddpSSize; length -= ddpSSize; + hdrlen += ddpSSize; ddp_print(bp, length, sdp->type, 0, lp->src, sdp->srcSkt); break; case lapDDP: if (length < ddpSize) { - (void)printf(" [|ddp %d]", length); - return; + (void)printf(" [|ddp %u]", length); + return (length); } dp = (const struct atDDP *)bp; snet = EXTRACT_16BITS(&dp->srcNet); @@ -132,6 +134,7 @@ atalk_print(register const u_char *bp, u_int length) ddpskt_string(dp->dstSkt)); bp += ddpSize; length -= ddpSize; + hdrlen += ddpSize; ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt); break; @@ -142,10 +145,41 @@ atalk_print(register const u_char *bp, u_int length) #endif default: - printf("%d > %d at-lap#%d %d", + printf("%d > %d at-lap#%d %u", lp->src, lp->dst, lp->type, length); break; } + return (hdrlen); +} + +/* + * Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called + * when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk + * packets in them). + */ +void +atalk_print(register const u_char *bp, u_int length) +{ + register const struct atDDP *dp; + u_short snet; + + if(!eflag) + printf("AT "); + + if (length < ddpSize) { + (void)printf(" [|ddp %u]", length); + return; + } + dp = (const struct atDDP *)bp; + snet = EXTRACT_16BITS(&dp->srcNet); + printf("%s.%s", ataddr_string(snet, dp->srcNode), + ddpskt_string(dp->srcSkt)); + printf(" > %s.%s: ", + ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode), + ddpskt_string(dp->dstSkt)); + bp += ddpSize; + length -= ddpSize; + ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt); } /* XXX should probably pass in the snap header and do checks like arp_print() */ @@ -158,9 +192,10 @@ aarp_print(register const u_char *bp, u_int length) printf("aarp "); ap = (const struct aarp *)bp; - if (ntohs(ap->htype) == 1 && ntohs(ap->ptype) == ETHERTYPE_ATALK && + if (EXTRACT_16BITS(&ap->htype) == 1 && + EXTRACT_16BITS(&ap->ptype) == ETHERTYPE_ATALK && ap->halen == 6 && ap->palen == 4 ) - switch (ntohs(ap->op)) { + switch (EXTRACT_16BITS(&ap->op)) { case 1: /* request */ (void)printf("who-has %s tell %s", @@ -169,7 +204,7 @@ aarp_print(register const u_char *bp, u_int length) case 2: /* response */ (void)printf("reply %s is-at %s", - AT(pdaddr), etheraddr_string(ap->hdaddr)); + AT(psaddr), etheraddr_string(ap->hsaddr)); return; case 3: /* probe (oy!) */ @@ -178,10 +213,13 @@ aarp_print(register const u_char *bp, u_int length) return; } (void)printf("len %u op %u htype %u ptype %#x halen %u palen %u", - length, ntohs(ap->op), ntohs(ap->htype), ntohs(ap->ptype), - ap->halen, ap->palen); + length, EXTRACT_16BITS(&ap->op), EXTRACT_16BITS(&ap->htype), + EXTRACT_16BITS(&ap->ptype), ap->halen, ap->palen); } +/* + * Print AppleTalk Datagram Delivery Protocol packets. + */ static void ddp_print(register const u_char *bp, register u_int length, register int t, register u_short snet, register u_char snode, u_char skt) @@ -197,6 +235,10 @@ ddp_print(register const u_char *bp, register u_int length, register int t, atp_print((const struct atATP *)bp, length); break; + case ddpEIGRP: + eigrp_print(bp, length); + break; + default: (void)printf(" at-%s %d", tok2str(type2str, NULL, t), length); break; @@ -214,6 +256,10 @@ atp_print(register const struct atATP *ap, u_int length) fputs(tstr, stdout); return; } + if (length < sizeof(*ap)) { + (void)printf(" [|atp %u]", length); + return; + } length -= sizeof(*ap); switch (ap->control & 0xc0) { @@ -225,7 +271,7 @@ atp_print(register const struct atATP *ap, u_int length) atp_bitmap_print(ap->bitmap); if (length != 0) - (void)printf(" [len=%d]", length); + (void)printf(" [len=%u]", length); switch (ap->control & (atpEOM|atpSTS)) { case atpEOM: @@ -241,7 +287,7 @@ atp_print(register const struct atATP *ap, u_int length) break; case atpRspCode: - (void)printf(" atp-resp%s%d:%d (%d)", + (void)printf(" atp-resp%s%d:%d (%u)", ap->control & atpEOM? "*" : " ", EXTRACT_16BITS(&ap->transID), ap->bitmap, length); switch (ap->control & (atpXO|atpSTS)) { @@ -264,7 +310,7 @@ atp_print(register const struct atATP *ap, u_int length) /* length should be zero */ if (length) - (void)printf(" [len=%d]", length); + (void)printf(" [len=%u]", length); /* there shouldn't be any control flags */ if (ap->control & (atpXO|atpEOM|atpSTS)) { @@ -286,7 +332,7 @@ atp_print(register const struct atATP *ap, u_int length) break; default: - (void)printf(" atp-0x%x %d (%d)", ap->control, + (void)printf(" atp-0x%x %d (%u)", ap->control, EXTRACT_16BITS(&ap->transID), length); break; } @@ -331,14 +377,19 @@ nbp_print(register const struct atNBP *np, u_int length, register u_short snet, register u_char snode, register u_char skt) { register const struct atNBPtuple *tp = - (struct atNBPtuple *)((u_char *)np + nbpHeaderSize); + (const struct atNBPtuple *)((u_char *)np + nbpHeaderSize); int i; const u_char *ep; + if (length < nbpHeaderSize) { + (void)printf(" truncated-nbp %u", length); + return; + } + length -= nbpHeaderSize; if (length < 8) { /* must be room for at least one tuple */ - (void)printf(" truncated-nbp %d", length + nbpHeaderSize); + (void)printf(" truncated-nbp %u", length + nbpHeaderSize); return; } /* ep points to end of available data */ @@ -383,7 +434,7 @@ nbp_print(register const struct atNBP *np, u_int length, register u_short snet, break; default: - (void)printf(" nbp-0x%x %d (%d)", np->control, np->id, + (void)printf(" nbp-0x%x %d (%u)", np->control, np->id, length); break; } @@ -407,7 +458,7 @@ print_cstring(register const char *cp, register const u_char *ep) return (0); } while ((int)--length >= 0) { - if (cp >= (char *)ep) { + if (cp >= (const char *)ep) { fputs(tstr, stdout); return (0); } @@ -484,7 +535,7 @@ ataddr_string(u_short atnet, u_char athost) { register struct hnamemem *tp, *tp2; register int i = (atnet << 8) | athost; - char nambuf[MAXHOSTNAMELEN + 20]; + char nambuf[256+1]; static int first = 1; FILE *fp; @@ -495,28 +546,26 @@ ataddr_string(u_short atnet, u_char athost) if (first && (first = 0, !nflag) && (fp = fopen("/etc/atalk.names", "r"))) { char line[256]; - int i1, i2, i3; + int i1, i2; while (fgets(line, sizeof(line), fp)) { if (line[0] == '\n' || line[0] == 0 || line[0] == '#') continue; - if (sscanf(line, "%d.%d.%d %256s", &i1, &i2, &i3, - nambuf) == 4) + if (sscanf(line, "%d.%d %256s", &i1, &i2, nambuf) == 3) /* got a hostname. */ - i3 |= ((i1 << 8) | i2) << 8; - else if (sscanf(line, "%d.%d %256s", &i1, &i2, - nambuf) == 3) + i2 |= (i1 << 8); + else if (sscanf(line, "%d %256s", &i1, nambuf) == 2) /* got a net name */ - i3 = (((i1 << 8) | i2) << 8) | 255; + i2 = (i1 << 8) | 255; else continue; - for (tp = &hnametable[i3 & (HASHNAMESIZE-1)]; + for (tp = &hnametable[i2 & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) ; - tp->addr = i3; + tp->addr = i2; tp->nxt = newhnamemem(); - tp->name = savestr(nambuf); + tp->name = strdup(nambuf); } fclose(fp); } @@ -533,24 +582,22 @@ ataddr_string(u_short atnet, u_char athost) tp->nxt = newhnamemem(); (void)snprintf(nambuf, sizeof(nambuf), "%s.%d", tp2->name, athost); - tp->name = savestr(nambuf); + tp->name = strdup(nambuf); return (tp->name); } tp->addr = (atnet << 8) | athost; tp->nxt = newhnamemem(); if (athost != 255) - (void)snprintf(nambuf, sizeof(nambuf), "%d.%d.%d", - atnet >> 8, atnet & 0xff, athost); + (void)snprintf(nambuf, sizeof(nambuf), "%d.%d", atnet, athost); else - (void)snprintf(nambuf, sizeof(nambuf), "%d.%d", atnet >> 8, - atnet & 0xff); - tp->name = savestr(nambuf); + (void)snprintf(nambuf, sizeof(nambuf), "%d", atnet); + tp->name = strdup(nambuf); return (tp->name); } -static struct tok skt2str[] = { +static const struct tok skt2str[] = { { rtmpSkt, "rtmp" }, /* routing table maintenance */ { nbpSkt, "nis" }, /* name info socket */ { echoSkt, "echo" }, /* AppleTalk echo protocol */