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Handle very large -f files by rejecting them.
[tcpdump] / print-dccp.c
diff --git a/print-dccp.c b/print-dccp.c
index 09cf72b2bab754fc6d27f97638a32af0fa04e536..bc3feb7c12af3fe79bdabd8e3b98b2b243f0d732 100644 (file)
--- a/print-dccp.c
+++ b/print-dccp.c
@@ -7,22 +7,22 @@
  * BSD-style license that accompanies tcpdump or the GNU GPL version 2
  */
 
  * 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
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 #include <stdio.h>
 #include <string.h>
 
 
 #include <stdio.h>
 #include <string.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "addrtoname.h"
-#include "extract.h"                   /* must come after interface.h */
+#include "extract.h"
 #include "ip.h"
 #include "ip.h"
-#ifdef INET6
 #include "ip6.h"
 #include "ip6.h"
-#endif
 #include "ipproto.h"
 
 /* RFC4340: Datagram Congestion Control Protocol (DCCP) */
 #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);
 }
 
                                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);
 }
                                dccp_csum_coverage(dh, len), IPPROTO_DCCP);
 }
-#endif
 
 static const char *dccp_reset_code(uint8_t code)
 {
 
 static const char *dccp_reset_code(uint8_t code)
 {
@@ -271,9 +270,7 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 {
        const struct dccp_hdr *dh;
        const struct ip *ip;
 {
        const struct dccp_hdr *dh;
        const struct ip *ip;
-#ifdef INET6
        const struct ip6_hdr *ip6;
        const struct ip6_hdr *ip6;
-#endif
        const u_char *cp;
        u_short sport, dport;
        u_int hlen;
        const u_char *cp;
        u_short sport, dport;
        u_int hlen;
@@ -283,12 +280,10 @@ 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;
        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;
        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);
 
        /* make sure we have enough data to look at the X bit */
        cp = (const u_char *)(dh + 1);
@@ -315,14 +310,11 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
        dport = EXTRACT_16BITS(&dh->dccph_dport);
        hlen = dh->dccph_doff * 4;
 
        dport = EXTRACT_16BITS(&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));
        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));
                ND_PRINT((ndo, "%s.%d > %s.%d: ",
                          ipaddr_string(ndo, &ip->ip_src), sport,
                          ipaddr_string(ndo, &ip->ip_dst), dport));
@@ -352,10 +344,8 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
                ND_PRINT((ndo, "cksum 0x%04x ", dccp_sum));
                if (IP_V(ip) == 4)
                        sum = dccp_cksum(ndo, ip, dh, len);
                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)
                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
                if (sum != 0)
                        ND_PRINT((ndo, "(incorrect -> 0x%04x)",in_cksum_shouldbe(dccp_sum, sum)));
                else
@@ -497,7 +487,6 @@ void dccp_print(netdissect_options *ndo, const u_char *bp, const u_char *data2,
 
        /* process options */
        if (hlen > fixed_hdrlen){
 
        /* process options */
        if (hlen > fixed_hdrlen){
-               const u_char *cp;
                u_int optlen;
                cp = bp + fixed_hdrlen;
                ND_PRINT((ndo, " <"));
                u_int optlen;
                cp = bp + fixed_hdrlen;
                ND_PRINT((ndo, " <"));
@@ -541,7 +530,8 @@ static const struct tok dccp_option_values[] = {
        { 0, NULL }
 };
 
        { 0, NULL }
 };
 
-static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_int hlen)
+static int
+dccp_print_option(netdissect_options *ndo, const u_char *option, u_int hlen)
 {
        uint8_t optlen, i;
 
 {
        uint8_t optlen, i;
 
@@ -634,16 +624,54 @@ static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_in
                        }
                        break;
                case 41:
                        }
                        break;
                case 41:
-                       if (optlen == 4)
+               /*
+                * 13.1.  Timestamp Option
+                *
+                *  +--------+--------+--------+--------+--------+--------+
+                *  |00101001|00000110|          Timestamp Value          |
+                *  +--------+--------+--------+--------+--------+--------+
+                *   Type=41  Length=6
+                */
+                       if (optlen == 6)
                                ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
                        else
                                ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
                        else
-                               ND_PRINT((ndo, " optlen != 4"));
+                               ND_PRINT((ndo, " [optlen != 6]"));
                        break;
                case 42:
                        break;
                case 42:
-                       if (optlen == 4)
+               /*
+                * 13.3.  Timestamp Echo Option
+                *
+                *  +--------+--------+--------+--------+--------+--------+
+                *  |00101010|00000110|           Timestamp Echo          |
+                *  +--------+--------+--------+--------+--------+--------+
+                *   Type=42    Len=6
+                *
+                *  +--------+--------+------- ... -------+--------+--------+
+                *  |00101010|00001000|  Timestamp Echo   |   Elapsed Time  |
+                *  +--------+--------+------- ... -------+--------+--------+
+                *   Type=42    Len=8       (4 bytes)
+                *
+                *  +--------+--------+------- ... -------+------- ... -------+
+                *  |00101010|00001010|  Timestamp Echo   |    Elapsed Time   |
+                *  +--------+--------+------- ... -------+------- ... -------+
+                *   Type=42   Len=10       (4 bytes)           (4 bytes)
+                */
+                       switch (optlen) {
+                       case 6:
                                ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
                                ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
-                       else
-                               ND_PRINT((ndo, " optlen != 4"));
+                               break;
+                       case 8:
+                               ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
+                               ND_PRINT((ndo, " (elapsed time %u)", EXTRACT_16BITS(option + 6)));
+                               break;
+                       case 10:
+                               ND_PRINT((ndo, " %u", EXTRACT_32BITS(option + 2)));
+                               ND_PRINT((ndo, " (elapsed time %u)", EXTRACT_32BITS(option + 6)));
+                               break;
+                       default:
+                               ND_PRINT((ndo, " [optlen != 6 or 8 or 10]"));
+                               break;
+                       }
                        break;
                case 43:
                        if (optlen == 6)
                        break;
                case 43:
                        if (optlen == 6)
@@ -651,7 +679,7 @@ static int dccp_print_option(netdissect_options *ndo, const u_char *option, u_in
                        else if (optlen == 4)
                                ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
                        else
                        else if (optlen == 4)
                                ND_PRINT((ndo, " %u", EXTRACT_16BITS(option + 2)));
                        else
-                               ND_PRINT((ndo, " optlen != 4 or 6"));
+                               ND_PRINT((ndo, " [optlen != 4 or 6]"));
                        break;
                case 44:
                        if (optlen > 2) {
                        break;
                case 44:
                        if (optlen > 2) {
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