Make nd_uint8_t and nd_int8_t arrays, to catch direct references.

[tcpdump] / print-ip.c

diff --git a/print-ip.c b/print-ip.c
index b9d39cf511dde65db4230b6596419e9091e9fe46..b1deb78a0ee62386a825f2c510a84c7bedbf6638 100644 (file)
--- a/print-ip.c
+++ b/print-ip.c
@@ -484,14 +484,16 @@ again:
                                ND_PRINT((ndo, "carp %s > %s: ",
                                             ipaddr_string(ndo, &ipds->ip->ip_src),
                                             ipaddr_string(ndo, &ipds->ip->ip_dst)));
-                       carp_print(ndo, ipds->cp, ipds->len, ipds->ip->ip_ttl);
+                       carp_print(ndo, ipds->cp, ipds->len,
+                               EXTRACT_U_1(ipds->ip->ip_ttl));
                } else {
                        if (ndo->ndo_vflag)
                                ND_PRINT((ndo, "vrrp %s > %s: ",
                                             ipaddr_string(ndo, &ipds->ip->ip_src),
                                             ipaddr_string(ndo, &ipds->ip->ip_dst)));
                        vrrp_print(ndo, ipds->cp, ipds->len,
-                               (const u_char *)ipds->ip, ipds->ip->ip_ttl);
+                               (const u_char *)ipds->ip,
+                               EXTRACT_U_1(ipds->ip->ip_ttl));
                }
                break;
 
@@ -541,6 +543,7 @@ ip_print(netdissect_options *ndo,
        const u_char *ipend;
        u_int hlen;
        struct cksum_vec vec[1];
+       uint8_t ip_tos, ip_ttl, ip_proto;
        uint16_t sum, ip_sum;
        const char *p_name;
 
@@ -598,10 +601,13 @@ ip_print(netdissect_options *ndo,
 
        ipds->off = EXTRACT_BE_U_2(&ipds->ip->ip_off);
 
+        ip_proto = EXTRACT_U_1(ipds->ip->ip_p);
+
         if (ndo->ndo_vflag) {
-            ND_PRINT((ndo, "(tos 0x%x", ipds->ip->ip_tos));
+            ip_tos = EXTRACT_U_1(ipds->ip->ip_tos);
+            ND_PRINT((ndo, "(tos 0x%x", ip_tos));
             /* ECN bits */
-            switch (ipds->ip->ip_tos & 0x03) {
+            switch (ip_tos & 0x03) {
 
             case 0:
                 break;
@@ -619,23 +625,23 @@ ip_print(netdissect_options *ndo,
                 break;
             }
 
-            if (ipds->ip->ip_ttl >= 1)
-                ND_PRINT((ndo, ", ttl %u", ipds->ip->ip_ttl));
+            ip_ttl = EXTRACT_U_1(ipds->ip->ip_ttl);
+            if (ip_ttl >= 1)
+                ND_PRINT((ndo, ", ttl %u", ip_ttl));
 
            /*
             * for the firewall guys, print id, offset.
              * On all but the last stick a "+" in the flags portion.
             * For unfragmented datagrams, note the don't fragment flag.
             */
-
            ND_PRINT((ndo, ", id %u, offset %u, flags [%s], proto %s (%u)",
                          EXTRACT_BE_U_2(&ipds->ip->ip_id),
                          (ipds->off & 0x1fff) * 8,
                          bittok2str(ip_frag_values, "none", ipds->off&0xe000),
-                         tok2str(ipproto_values,"unknown",ipds->ip->ip_p),
-                         ipds->ip->ip_p));
+                         tok2str(ipproto_values, "unknown", ip_proto),
+                         ip_proto));
 
-            ND_PRINT((ndo, ", length %u", EXTRACT_BE_U_2(&ipds->ip->ip_len)));
+            ND_PRINT((ndo, ", length %u", EXTRACT_BE_U_2(ipds->ip->ip_len)));
 
             if ((hlen - sizeof(struct ip)) > 0) {
                 ND_PRINT((ndo, ", options ("));
@@ -648,13 +654,13 @@ ip_print(netdissect_options *ndo,
                vec[0].len = hlen;
                sum = in_cksum(vec, 1);
                if (sum != 0) {
-                   ip_sum = EXTRACT_BE_U_2(&ipds->ip->ip_sum);
+                   ip_sum = EXTRACT_BE_U_2(ipds->ip->ip_sum);
                    ND_PRINT((ndo, ", bad cksum %x (->%x)!", ip_sum,
                             in_cksum_shouldbe(ip_sum, sum)));
                }
            }
 
-               ND_PRINT((ndo, ")\n    "));
+           ND_PRINT((ndo, ")\n    "));
        }
 
        /*
@@ -663,7 +669,7 @@ ip_print(netdissect_options *ndo,
         */
        if ((ipds->off & 0x1fff) == 0) {
                ipds->cp = (const u_char *)ipds->ip + hlen;
-               ipds->nh = ipds->ip->ip_p;
+               ipds->nh = EXTRACT_U_1(ipds->ip->ip_p);
 
                if (ipds->nh != IPPROTO_TCP && ipds->nh != IPPROTO_UDP &&
                    ipds->nh != IPPROTO_SCTP && ipds->nh != IPPROTO_DCCP) {
@@ -687,10 +693,10 @@ ip_print(netdissect_options *ndo,
                 */
                ND_PRINT((ndo, "%s > %s:", ipaddr_string(ndo, &ipds->ip->ip_src),
                          ipaddr_string(ndo, &ipds->ip->ip_dst)));
-               if (!ndo->ndo_nflag && (p_name = netdb_protoname(ipds->ip->ip_p)) != NULL)
+               if (!ndo->ndo_nflag && (p_name = netdb_protoname(ip_proto)) != NULL)
                        ND_PRINT((ndo, " %s", p_name));
                else
-                       ND_PRINT((ndo, " ip-proto-%d", ipds->ip->ip_p));
+                       ND_PRINT((ndo, " ip-proto-%u", ip_proto));
        }
        return;
 
@@ -716,7 +722,7 @@ ipN_print(netdissect_options *ndo, register const u_char *bp, register u_int len
                ip6_print (ndo, bp, length);
                break;
        default:
-               ND_PRINT((ndo, "unknown ip %d", (EXTRACT_U_1(bp) & 0xF0) >> 4));
+               ND_PRINT((ndo, "unknown ip %u", (EXTRACT_U_1(bp) & 0xF0) >> 4));
                break;
        }
        return;