X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/339f6a65b25d0d3b5d235e19238b75d0afe5dac7..486704db7c840dcfb51f70f1812d9c3ad37ad39c:/print-dvmrp.c

diff --git a/print-dvmrp.c b/print-dvmrp.c
index 01265fd1..8e008326 100644
--- a/print-dvmrp.c
+++ b/print-dvmrp.c
@@ -19,25 +19,11 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-dvmrp.c,v 1.21 2001-05-10 05:30:20 fenner Exp $ (LBL)";
-#endif
-
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
+#include <tcpdump-stdinc.h>
 
 #include "interface.h"
 #include "extract.h"
@@ -67,26 +53,28 @@ static const char rcsid[] =
 #define DVMRP_NF_DISABLED	0x20	/* administratively disabled */
 #define DVMRP_NF_QUERIER	0x40	/* I am the subnet's querier */
 
-static void print_probe(const u_char *, const u_char *, u_int);
-static void print_report(const u_char *, const u_char *, u_int);
-static void print_neighbors(const u_char *, const u_char *, u_int);
-static void print_neighbors2(const u_char *, const u_char *, u_int);
-static void print_prune(const u_char *, const u_char *, u_int);
-static void print_graft(const u_char *, const u_char *, u_int);
-static void print_graft_ack(const u_char *, const u_char *, u_int);
+static int print_probe(netdissect_options *, const u_char *, const u_char *, u_int);
+static int print_report(netdissect_options *, const u_char *, const u_char *, u_int);
+static int print_neighbors(netdissect_options *, const u_char *, const u_char *, u_int);
+static int print_neighbors2(netdissect_options *, const u_char *, const u_char *, u_int);
+static int print_prune(netdissect_options *, const u_char *);
+static int print_graft(netdissect_options *, const u_char *);
+static int print_graft_ack(netdissect_options *, const u_char *);
 
-static u_int32_t target_level;
+static uint32_t target_level;
 
 void
-dvmrp_print(register const u_char *bp, register u_int len)
+dvmrp_print(netdissect_options *ndo,
+            register const u_char *bp, register u_int len)
 {
 	register const u_char *ep;
 	register u_char type;
 
-	ep = (const u_char *)snapend;
+	ep = (const u_char *)ndo->ndo_snapend;
 	if (bp >= ep)
 		return;
 
+	ND_TCHECK(bp[1]);
 	type = bp[1];
 
 	/* Skip IGMP header */
@@ -96,77 +84,95 @@ dvmrp_print(register const u_char *bp, register u_int len)
 	switch (type) {
 
 	case DVMRP_PROBE:
-		printf(" Probe");
-		if (vflag)
-			print_probe(bp, ep, len);
+		ND_PRINT((ndo, " Probe"));
+		if (ndo->ndo_vflag) {
+			if (print_probe(ndo, bp, ep, len) < 0)
+				goto trunc;
+		}
 		break;
 
 	case DVMRP_REPORT:
-		printf(" Report");
-		if (vflag > 1)
-			print_report(bp, ep, len);
+		ND_PRINT((ndo, " Report"));
+		if (ndo->ndo_vflag > 1) {
+			if (print_report(ndo, bp, ep, len) < 0)
+				goto trunc;
+		}
 		break;
 
 	case DVMRP_ASK_NEIGHBORS:
-		printf(" Ask-neighbors(old)");
+		ND_PRINT((ndo, " Ask-neighbors(old)"));
 		break;
 
 	case DVMRP_NEIGHBORS:
-		printf(" Neighbors(old)");
-		print_neighbors(bp, ep, len);
+		ND_PRINT((ndo, " Neighbors(old)"));
+		if (print_neighbors(ndo, bp, ep, len) < 0)
+			goto trunc;
 		break;
 
 	case DVMRP_ASK_NEIGHBORS2:
-		printf(" Ask-neighbors2");
+		ND_PRINT((ndo, " Ask-neighbors2"));
 		break;
 
 	case DVMRP_NEIGHBORS2:
-		printf(" Neighbors2");
+		ND_PRINT((ndo, " Neighbors2"));
 		/*
 		 * extract version and capabilities from IGMP group
 		 * address field
 		 */
 		bp -= 4;
+		ND_TCHECK2(bp[0], 4);
 		target_level = (bp[0] << 24) | (bp[1] << 16) |
 		    (bp[2] << 8) | bp[3];
 		bp += 4;
-		print_neighbors2(bp, ep, len);
+		if (print_neighbors2(ndo, bp, ep, len) < 0)
+			goto trunc;
 		break;
 
 	case DVMRP_PRUNE:
-		printf(" Prune");
-		print_prune(bp, ep, len);
+		ND_PRINT((ndo, " Prune"));
+		if (print_prune(ndo, bp) < 0)
+			goto trunc;
 		break;
 
 	case DVMRP_GRAFT:
-		printf(" Graft");
-		print_graft(bp, ep, len);
+		ND_PRINT((ndo, " Graft"));
+		if (print_graft(ndo, bp) < 0)
+			goto trunc;
 		break;
 
 	case DVMRP_GRAFT_ACK:
-		printf(" Graft-ACK");
-		print_graft_ack(bp, ep, len);
+		ND_PRINT((ndo, " Graft-ACK"));
+		if (print_graft_ack(ndo, bp) < 0)
+			goto trunc;
 		break;
 
 	default:
-		printf(" [type %d]", type);
+		ND_PRINT((ndo, " [type %d]", type));
 		break;
 	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, "[|dvmrp]"));
+	return;
 }
 
-static void
-print_report(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_report(netdissect_options *ndo,
+             register const u_char *bp, register const u_char *ep,
+             register u_int len)
 {
-	register u_int32_t mask, origin;
-	register int metric, i, width, done;
+	register uint32_t mask, origin;
+	register int metric, done;
+	register u_int i, width;
 
 	while (len > 0) {
 		if (len < 3) {
-			printf(" [|]");
-			return;
+			ND_PRINT((ndo, " [|]"));
+			return (0);
 		}
-		mask = (u_int32_t)0xff << 24 | bp[0] << 16 | bp[1] << 8 | bp[2];
+		ND_TCHECK2(bp[0], 3);
+		mask = (uint32_t)0xff << 24 | bp[0] << 16 | bp[1] << 8 | bp[2];
 		width = 1;
 		if (bp[0])
 			width = 2;
@@ -175,70 +181,75 @@ print_report(register const u_char *bp, register const u_char *ep,
 		if (bp[2])
 			width = 4;
 
-		printf("\n\tMask %s", intoa(htonl(mask)));
+		ND_PRINT((ndo, "\n\tMask %s", intoa(htonl(mask))));
 		bp += 3;
 		len -= 3;
 		do {
 			if (bp + width + 1 > ep) {
-				printf(" [|]");
-				return;
+				ND_PRINT((ndo, " [|]"));
+				return (0);
 			}
 			if (len < width + 1) {
-				printf("\n\t  [Truncated Report]");
-				return;
+				ND_PRINT((ndo, "\n\t  [Truncated Report]"));
+				return (0);
 			}
 			origin = 0;
-			for (i = 0; i < width; ++i)
+			for (i = 0; i < width; ++i) {
+				ND_TCHECK(*bp);
 				origin = origin << 8 | *bp++;
+			}
 			for ( ; i < 4; ++i)
 				origin <<= 8;
 
+			ND_TCHECK(*bp);
 			metric = *bp++;
 			done = metric & 0x80;
 			metric &= 0x7f;
-			printf("\n\t  %s metric %d", intoa(htonl(origin)),
-				metric);
+			ND_PRINT((ndo, "\n\t  %s metric %d", intoa(htonl(origin)),
+				metric));
 			len -= width + 1;
 		} while (!done);
 	}
+	return (0);
+trunc:
+	return (-1);
 }
 
-static void
-print_probe(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_probe(netdissect_options *ndo,
+            register const u_char *bp, register const u_char *ep,
+            register u_int len)
 {
-	register u_int32_t genid;
+	register uint32_t genid;
 
-	TCHECK2(bp[0], 4);
+	ND_TCHECK2(bp[0], 4);
 	if ((len < 4) || ((bp + 4) > ep)) {
 		/* { (ctags) */
-		printf(" [|}");
-		return;
+		ND_PRINT((ndo, " [|}"));
+		return (0);
 	}
 	genid = (bp[0] << 24) | (bp[1] << 16) | (bp[2] << 8) | bp[3];
 	bp += 4;
 	len -= 4;
-	if (vflag > 1)
-		printf("\n\t");
-	else
-		printf(" ");
-	printf("genid %u", genid);
-	if (vflag < 2)
-		return;
+	ND_PRINT((ndo, ndo->ndo_vflag > 1 ? "\n\t" : " "));
+	ND_PRINT((ndo, "genid %u", genid));
+	if (ndo->ndo_vflag < 2)
+		return (0);
 
 	while ((len > 0) && (bp < ep)) {
-		TCHECK2(bp[0], 4);
-		printf("\n\tneighbor %s", ipaddr_string(bp));
+		ND_TCHECK2(bp[0], 4);
+		ND_PRINT((ndo, "\n\tneighbor %s", ipaddr_string(ndo, bp)));
 		bp += 4; len -= 4;
 	}
-	return;
+	return (0);
 trunc:
-	(void)printf("[|dvmrp]");
+	return (-1);
 }
 
-static void
-print_neighbors(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_neighbors(netdissect_options *ndo,
+                register const u_char *bp, register const u_char *ep,
+                register u_int len)
 {
 	const u_char *laddr;
 	register u_char metric;
@@ -246,7 +257,7 @@ print_neighbors(register const u_char *bp, register const u_char *ep,
 	register int ncount;
 
 	while (len > 0 && bp < ep) {
-		TCHECK2(bp[0], 7);
+		ND_TCHECK2(bp[0], 7);
 		laddr = bp;
 		bp += 4;
 		metric = *bp++;
@@ -254,33 +265,34 @@ print_neighbors(register const u_char *bp, register const u_char *ep,
 		ncount = *bp++;
 		len -= 7;
 		while (--ncount >= 0) {
-			TCHECK2(bp[0], 4);
-			printf(" [%s ->", ipaddr_string(laddr));
-			printf(" %s, (%d/%d)]",
-				   ipaddr_string(bp), metric, thresh);
+			ND_TCHECK2(bp[0], 4);
+			ND_PRINT((ndo, " [%s ->", ipaddr_string(ndo, laddr)));
+			ND_PRINT((ndo, " %s, (%d/%d)]",
+				   ipaddr_string(ndo, bp), metric, thresh));
 			bp += 4;
 			len -= 4;
 		}
 	}
-	return;
+	return (0);
 trunc:
-	(void)printf("[|dvmrp]");
+	return (-1);
 }
 
-static void
-print_neighbors2(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_neighbors2(netdissect_options *ndo,
+                 register const u_char *bp, register const u_char *ep,
+                 register u_int len)
 {
 	const u_char *laddr;
 	register u_char metric, thresh, flags;
 	register int ncount;
 
-	printf(" (v %d.%d):",
+	ND_PRINT((ndo, " (v %d.%d):",
 	       (int)target_level & 0xff,
-	       (int)(target_level >> 8) & 0xff);
+	       (int)(target_level >> 8) & 0xff));
 
 	while (len > 0 && bp < ep) {
-		TCHECK2(bp[0], 8);
+		ND_TCHECK2(bp[0], 8);
 		laddr = bp;
 		bp += 4;
 		metric = *bp++;
@@ -289,65 +301,65 @@ print_neighbors2(register const u_char *bp, register const u_char *ep,
 		ncount = *bp++;
 		len -= 8;
 		while (--ncount >= 0 && (len >= 4) && (bp + 4) <= ep) {
-			printf(" [%s -> ", ipaddr_string(laddr));
-			printf("%s (%d/%d", ipaddr_string(bp),
-				     metric, thresh);
+			ND_PRINT((ndo, " [%s -> ", ipaddr_string(ndo, laddr)));
+			ND_PRINT((ndo, "%s (%d/%d", ipaddr_string(ndo, bp),
+				     metric, thresh));
 			if (flags & DVMRP_NF_TUNNEL)
-				printf("/tunnel");
+				ND_PRINT((ndo, "/tunnel"));
 			if (flags & DVMRP_NF_SRCRT)
-				printf("/srcrt");
+				ND_PRINT((ndo, "/srcrt"));
 			if (flags & DVMRP_NF_QUERIER)
-				printf("/querier");
+				ND_PRINT((ndo, "/querier"));
 			if (flags & DVMRP_NF_DISABLED)
-				printf("/disabled");
+				ND_PRINT((ndo, "/disabled"));
 			if (flags & DVMRP_NF_DOWN)
-				printf("/down");
-			printf(")]");
+				ND_PRINT((ndo, "/down"));
+			ND_PRINT((ndo, ")]"));
 			bp += 4;
 			len -= 4;
 		}
 		if (ncount != -1) {
-			printf(" [|]");
-			return;
+			ND_PRINT((ndo, " [|]"));
+			return (0);
 		}
 	}
-	return;
+	return (0);
 trunc:
-	(void)printf("[|dvmrp]");
+	return (-1);
 }
 
-static void
-print_prune(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_prune(netdissect_options *ndo,
+            register const u_char *bp)
 {
-	TCHECK2(bp[0], 12);
-	printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
+	ND_TCHECK2(bp[0], 12);
+	ND_PRINT((ndo, " src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4)));
 	bp += 8;
-	(void)printf(" timer ");
-	relts_print(EXTRACT_32BITS(bp));
-	return;
+	ND_PRINT((ndo, " timer "));
+	relts_print(ndo, EXTRACT_32BITS(bp));
+	return (0);
 trunc:
-	(void)printf("[|dvmrp]");
+	return (-1);
 }
 
-static void
-print_graft(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_graft(netdissect_options *ndo,
+            register const u_char *bp)
 {
-	TCHECK2(bp[0], 8);
-	printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
-	return;
+	ND_TCHECK2(bp[0], 8);
+	ND_PRINT((ndo, " src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4)));
+	return (0);
 trunc:
-	(void)printf("[|dvmrp]");
+	return (-1);
 }
 
-static void
-print_graft_ack(register const u_char *bp, register const u_char *ep,
-    register u_int len)
+static int
+print_graft_ack(netdissect_options *ndo,
+                register const u_char *bp)
 {
-	TCHECK2(bp[0], 8);
-	printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
-	return;
+	ND_TCHECK2(bp[0], 8);
+	ND_PRINT((ndo, " src %s grp %s", ipaddr_string(ndo, bp), ipaddr_string(ndo, bp + 4)));
+	return (0);
 trunc:
-	(void)printf("[|dvmrp]");
+	return (-1);
 }