X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/c1c3c77463d592cc576eaa491e604752044ca55a..1a04b92e365f5ed01ca38619b41bcc4fc9cbd63c:/print-dccp.c

diff --git a/print-dccp.c b/print-dccp.c
index 74054fb6..66d215fe 100644
--- a/print-dccp.c
+++ b/print-dccp.c
@@ -7,22 +7,22 @@
  * BSD-style license that accompanies tcpdump or the GNU GPL version 2
  */
 
+/* \summary: Datagram Congestion Control Protocol (DCCP) printer */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 #include <stdio.h>
 #include <string.h>
 
 #include "netdissect.h"
 #include "addrtoname.h"
-#include "extract.h"			/* must come after interface.h */
+#include "extract.h"
 #include "ip.h"
-#ifdef INET6
 #include "ip6.h"
-#endif
 #include "ipproto.h"
 
 /* RFC4340: Datagram Congestion Control Protocol (DCCP) */
@@ -204,13 +204,12 @@ static int dccp_cksum(netdissect_options *ndo, const struct ip *ip,
 				dccp_csum_coverage(dh, len), IPPROTO_DCCP);
 }
 
-#ifdef INET6
-static int dccp6_cksum(const struct ip6_hdr *ip6, const struct dccp_hdr *dh, u_int len)
+static int dccp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
+	const struct dccp_hdr *dh, u_int len)
 {
-	return nextproto6_cksum(ip6, (const uint8_t *)(const void *)dh, len,
+	return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)dh, len,
 				dccp_csum_coverage(dh, len), IPPROTO_DCCP);
 }
-#endif
 
 static const char *dccp_reset_code(uint8_t code)
 {
@@ -226,9 +225,9 @@ static uint64_t dccp_seqno(const u_char *bp)
 
 	if (DCCPH_X(dh) != 0) {
 		const struct dccp_hdr_ext *dhx = (const struct dccp_hdr_ext *)bp;
-		seqno = EXTRACT_48BITS(dhx->dccph_seq);
+		seqno = EXTRACT_BE_U_6(dhx->dccph_seq);
 	} else {
-		seqno = EXTRACT_24BITS(dh->dccph_seq);
+		seqno = EXTRACT_BE_U_3(dh->dccph_seq);
 	}
 
 	return seqno;
@@ -246,11 +245,11 @@ static void dccp_print_ack_no(netdissect_options *ndo, const u_char *bp)
 	uint64_t ackno;
 
 	if (DCCPH_X(dh) != 0) {
-		ND_TCHECK2(*ackp, 8);
-		ackno = EXTRACT_48BITS(ackp + 2);
+		ND_TCHECK_8(ackp);
+		ackno = EXTRACT_BE_U_6(ackp + 2);
 	} else {
-		ND_TCHECK2(*ackp, 4);
-		ackno = EXTRACT_24BITS(ackp + 1);
+		ND_TCHECK_4(ackp);
+		ackno = EXTRACT_BE_U_3(ackp + 1);
 	}
 
 	ND_PRINT((ndo, "(ack=%" PRIu64 ") ", ackno));
@@ -266,14 +265,13 @@ static int dccp_print_option(netdissect_options *, const u_char *, u_int);
  * @data2 - beginning of enclosing
  * @len - lenght of ip packet
  */
-void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
-		u_int len)
+void
+dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
+	   u_int len)
 {
 	const struct dccp_hdr *dh;
 	const struct ip *ip;
-#ifdef INET6
 	const struct ip6_hdr *ip6;
-#endif
 	const u_char *cp;
 	u_short sport, dport;
 	u_int hlen;
@@ -283,12 +281,10 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 	dh = (const struct dccp_hdr *)bp;
 
 	ip = (const struct ip *)data2;
-#ifdef INET6
 	if (IP_V(ip) == 6)
 		ip6 = (const struct ip6_hdr *)data2;
 	else
 		ip6 = NULL;
-#endif /*INET6*/
 
 	/* make sure we have enough data to look at the X bit */
 	cp = (const u_char *)(dh + 1);
@@ -309,20 +305,17 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 			  len - fixed_hdrlen));
 		return;
 	}
-	ND_TCHECK2(*dh, fixed_hdrlen);
+	ND_TCHECK_LEN(dh, fixed_hdrlen);
 
-	sport = EXTRACT_16BITS(&dh->dccph_sport);
-	dport = EXTRACT_16BITS(&dh->dccph_dport);
+	sport = EXTRACT_BE_U_2(&dh->dccph_sport);
+	dport = EXTRACT_BE_U_2(&dh->dccph_dport);
 	hlen = dh->dccph_doff * 4;
 
-#ifdef INET6
 	if (ip6) {
 		ND_PRINT((ndo, "%s.%d > %s.%d: ",
 			  ip6addr_string(ndo, &ip6->ip6_src), sport,
 			  ip6addr_string(ndo, &ip6->ip6_dst), dport));
-	} else
-#endif /*INET6*/
-	{
+	} else {
 		ND_PRINT((ndo, "%s.%d > %s.%d: ",
 			  ipaddr_string(ndo, &ip->ip_src), sport,
 			  ipaddr_string(ndo, &ip->ip_dst), dport));
@@ -345,17 +338,15 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 	}
 
 	/* checksum calculation */
-	if (ndo->ndo_vflag && ND_TTEST2(bp[0], len)) {
+	if (ndo->ndo_vflag && ND_TTEST_LEN(bp, len)) {
 		uint16_t sum = 0, dccp_sum;
 
-		dccp_sum = EXTRACT_16BITS(&dh->dccph_checksum);
+		dccp_sum = EXTRACT_BE_U_2(&dh->dccph_checksum);
 		ND_PRINT((ndo, "cksum 0x%04x ", dccp_sum));
 		if (IP_V(ip) == 4)
 			sum = dccp_cksum(ndo, ip, dh, len);
-#ifdef INET6
 		else if (IP_V(ip) == 6)
-			sum = dccp6_cksum(ip6, dh, len);
-#endif
+			sum = dccp6_cksum(ndo, ip6, dh, len);
 		if (sum != 0)
 			ND_PRINT((ndo, "(incorrect -> 0x%04x)",in_cksum_shouldbe(dccp_sum, sum)));
 		else
@@ -381,7 +372,7 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 		ND_TCHECK(*dhr);
 		ND_PRINT((ndo, "%s (service=%d) ",
 			  tok2str(dccp_pkt_type_str, "", dccph_type),
-			  EXTRACT_32BITS(&dhr->dccph_req_service)));
+			  EXTRACT_BE_U_4(&dhr->dccph_req_service)));
 		break;
 	}
 	case DCCP_PKT_RESPONSE: {
@@ -397,7 +388,7 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 		ND_TCHECK(*dhr);
 		ND_PRINT((ndo, "%s (service=%d) ",
 			  tok2str(dccp_pkt_type_str, "", dccph_type),
-			  EXTRACT_32BITS(&dhr->dccph_resp_service)));
+			  EXTRACT_BE_U_4(&dhr->dccph_resp_service)));
 		break;
 	}
 	case DCCP_PKT_DATA:
@@ -544,48 +535,48 @@ static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_in
 {
 	uint8_t optlen, i;
 
-	ND_TCHECK(*option);
+	ND_TCHECK_1(option);
 
-	if (*option >= 32) {
-		ND_TCHECK(*(option+1));
-		optlen = *(option +1);
+	if (EXTRACT_U_1(option) >= 32) {
+		ND_TCHECK_1(option + 1);
+		optlen = EXTRACT_U_1(option + 1);
 		if (optlen < 2) {
-			if (*option >= 128)
-				ND_PRINT((ndo, "CCID option %u optlen too short", *option));
+			if (EXTRACT_U_1(option) >= 128)
+				ND_PRINT((ndo, "CCID option %u optlen too short", EXTRACT_U_1(option)));
 			else
 				ND_PRINT((ndo, "%s optlen too short",
-					  tok2str(dccp_option_values, "Option %u", *option)));
+					  tok2str(dccp_option_values, "Option %u", EXTRACT_U_1(option))));
 			return 0;
 		}
 	} else
 		optlen = 1;
 
 	if (hlen < optlen) {
-		if (*option >= 128)
+		if (EXTRACT_U_1(option) >= 128)
 			ND_PRINT((ndo, "CCID option %u optlen goes past header length",
-				  *option));
+				  EXTRACT_U_1(option)));
 		else
 			ND_PRINT((ndo, "%s optlen goes past header length",
-				  tok2str(dccp_option_values, "Option %u", *option)));
+				  tok2str(dccp_option_values, "Option %u", EXTRACT_U_1(option))));
 		return 0;
 	}
-	ND_TCHECK2(*option, optlen);
+	ND_TCHECK_LEN(option, optlen);
 
-	if (*option >= 128) {
-		ND_PRINT((ndo, "CCID option %d", *option));
+	if (EXTRACT_U_1(option) >= 128) {
+		ND_PRINT((ndo, "CCID option %d", EXTRACT_U_1(option)));
 		switch (optlen) {
 			case 4:
-				ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
+				ND_PRINT((ndo, " %u", EXTRACT_BE_U_2(option + 2)));
 				break;
 			case 6:
-				ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
+				ND_PRINT((ndo, " %u", EXTRACT_BE_U_4(option + 2)));
 				break;
 			default:
 				break;
 		}
 	} else {
-		ND_PRINT((ndo, "%s", tok2str(dccp_option_values, "Option %u", *option)));
-		switch (*option) {
+		ND_PRINT((ndo, "%s", tok2str(dccp_option_values, "Option %u", EXTRACT_U_1(option))));
+		switch (EXTRACT_U_1(option)) {
 		case 32:
 		case 33:
 		case 34:
@@ -594,61 +585,61 @@ static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_in
 				ND_PRINT((ndo, " optlen too short"));
 				return optlen;
 			}
-			if (*(option + 2) < 10){
-				ND_PRINT((ndo, " %s", dccp_feature_nums[*(option + 2)]));
+			if (EXTRACT_U_1(option + 2) < 10){
+				ND_PRINT((ndo, " %s", dccp_feature_nums[EXTRACT_U_1(option + 2)]));
 				for (i = 0; i < optlen - 3; i++)
-					ND_PRINT((ndo, " %d", *(option + 3 + i)));
+					ND_PRINT((ndo, " %d", EXTRACT_U_1(option + 3 + i)));
 			}
 			break;
 		case 36:
 			if (optlen > 2) {
 				ND_PRINT((ndo, " 0x"));
 				for (i = 0; i < optlen - 2; i++)
-					ND_PRINT((ndo, "%02x", *(option + 2 + i)));
+					ND_PRINT((ndo, "%02x", EXTRACT_U_1(option + 2 + i)));
 			}
 			break;
 		case 37:
 			for (i = 0; i < optlen - 2; i++)
-				ND_PRINT((ndo, " %d", *(option + 2 + i)));
+				ND_PRINT((ndo, " %d", EXTRACT_U_1(option + 2 + i)));
 			break;
 		case 38:
 			if (optlen > 2) {
 				ND_PRINT((ndo, " 0x"));
 				for (i = 0; i < optlen - 2; i++)
-					ND_PRINT((ndo, "%02x", *(option + 2 + i)));
+					ND_PRINT((ndo, "%02x", EXTRACT_U_1(option + 2 + i)));
 			}
 			break;
 		case 39:
 			if (optlen > 2) {
 				ND_PRINT((ndo, " 0x"));
 				for (i = 0; i < optlen - 2; i++)
-					ND_PRINT((ndo, "%02x", *(option + 2 + i)));
+					ND_PRINT((ndo, "%02x", EXTRACT_U_1(option + 2 + i)));
 			}
 			break;
 		case 40:
 			if (optlen > 2) {
 				ND_PRINT((ndo, " 0x"));
 				for (i = 0; i < optlen - 2; i++)
-					ND_PRINT((ndo, "%02x", *(option + 2 + i)));
+					ND_PRINT((ndo, "%02x", EXTRACT_U_1(option + 2 + i)));
 			}
 			break;
 		case 41:
 			if (optlen == 4)
-				ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
+				ND_PRINT((ndo, " %u", EXTRACT_BE_U_4(option + 2)));
 			else
 				ND_PRINT((ndo, " optlen != 4"));
 			break;
 		case 42:
 			if (optlen == 4)
-				ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
+				ND_PRINT((ndo, " %u", EXTRACT_BE_U_4(option + 2)));
 			else
 				ND_PRINT((ndo, " optlen != 4"));
 			break;
 		case 43:
 			if (optlen == 6)
-				ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
+				ND_PRINT((ndo, " %u", EXTRACT_BE_U_4(option + 2)));
 			else if (optlen == 4)
-				ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
+				ND_PRINT((ndo, " %u", EXTRACT_BE_U_2(option + 2)));
 			else
 				ND_PRINT((ndo, " optlen != 4 or 6"));
 			break;
@@ -656,7 +647,7 @@ static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_in
 			if (optlen > 2) {
 				ND_PRINT((ndo, " "));
 				for (i = 0; i < optlen - 2; i++)
-					ND_PRINT((ndo, "%02x", *(option + 2 + i)));
+					ND_PRINT((ndo, "%02x", EXTRACT_U_1(option + 2 + i)));
 			}
 			break;
 		}