X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/505cd1fe15916e21abd6f2aa43a07bba649689cf..1a04b92e365f5ed01ca38619b41bcc4fc9cbd63c:/print-babel.c

diff --git a/print-babel.c b/print-babel.c
index d1931c82..3f0166d1 100644
--- a/print-babel.c
+++ b/print-babel.c
@@ -53,14 +53,14 @@ babel_print(netdissect_options *ndo,
 
     ND_TCHECK_4(cp);
 
-    if(cp[0] != 42) {
+    if(EXTRACT_U_1(cp) != 42) {
         ND_PRINT((ndo, " invalid header"));
         return;
     } else {
         ND_PRINT((ndo, " %d", EXTRACT_U_1(cp + 1)));
     }
 
-    switch(cp[1]) {
+    switch(EXTRACT_U_1(cp + 1)) {
     case 2:
         babel_print_v2(ndo, cp, length);
         break;
@@ -367,7 +367,7 @@ babel_print_v2(netdissect_options *ndo,
         message = cp + 4 + i;
 
         ND_TCHECK_1(message);
-        if((type = message[0]) == MESSAGE_PAD1) {
+        if((type = EXTRACT_U_1(message)) == MESSAGE_PAD1) {
             ND_PRINT((ndo, ndo->ndo_vflag ? "\n\tPad 1" : " pad1"));
             i += 1;
             continue;
@@ -375,9 +375,9 @@ babel_print_v2(netdissect_options *ndo,
 
         ND_TCHECK_2(message);
         ICHECK(i, 2);
-        len = message[1];
+        len = EXTRACT_U_1(message + 1);
 
-        ND_TCHECK2(*message, 2 + len);
+        ND_TCHECK_LEN(message, 2 + len);
         ICHECK(i, 2 + len);
 
         switch(type) {
@@ -501,12 +501,12 @@ babel_print_v2(netdissect_options *ndo,
                 u_char prefix[16];
                 ND_PRINT((ndo, "\n\tUpdate"));
                 if(len < 10) goto invalid;
-                plen = message[4] + (message[2] == 1 ? 96 : 0);
+                plen = EXTRACT_U_1(message + 4) + (EXTRACT_U_1(message + 2) == 1 ? 96 : 0);
                 rc = network_prefix(EXTRACT_U_1(message + 2),
                                     EXTRACT_U_1(message + 4),
                                     EXTRACT_U_1(message + 5),
                                     message + 12,
-                                    message[2] == 1 ? v4_prefix : v6_prefix,
+                                    EXTRACT_U_1(message + 2) == 1 ? v4_prefix : v6_prefix,
                                     len - 10, prefix);
                 if(rc < 0) goto invalid;
                 interval = EXTRACT_BE_U_2(message + 6);
@@ -518,8 +518,8 @@ babel_print_v2(netdissect_options *ndo,
                        (EXTRACT_U_1(message + 3) & 0x3f) ? "/unknown" : "",
                        format_prefix(ndo, prefix, plen),
                        metric, seqno, format_interval_update(interval)));
-                if(message[3] & 0x80) {
-                    if(message[2] == 1)
+                if(EXTRACT_U_1(message + 3) & 0x80) {
+                    if(EXTRACT_U_1(message + 2) == 1)
                         memcpy(v4_prefix, prefix, 16);
                     else
                         memcpy(v6_prefix, prefix, 16);
@@ -539,7 +539,7 @@ babel_print_v2(netdissect_options *ndo,
                 u_char prefix[16], plen;
                 ND_PRINT((ndo, "\n\tRequest "));
                 if(len < 2) goto invalid;
-                plen = message[3] + (message[2] == 1 ? 96 : 0);
+                plen = EXTRACT_U_1(message + 3) + (EXTRACT_U_1(message + 2) == 1 ? 96 : 0);
                 rc = network_prefix(EXTRACT_U_1(message + 2),
                                     EXTRACT_U_1(message + 3), 0,
                                     message + 4, NULL, len - 2, prefix);
@@ -564,7 +564,7 @@ babel_print_v2(netdissect_options *ndo,
                                     EXTRACT_U_1(message + 3), 0,
                                     message + 16, NULL, len - 14, prefix);
                 if(rc < 0) goto invalid;
-                plen = message[3] + (message[2] == 1 ? 96 : 0);
+                plen = EXTRACT_U_1(message + 3) + (EXTRACT_U_1(message + 2) == 1 ? 96 : 0);
                 ND_PRINT((ndo, "(%u hops) for %s seqno %u id %s",
                        EXTRACT_U_1(message + 6), format_prefix(ndo, prefix, plen),
                        seqno, format_id(message + 8)));
@@ -606,10 +606,10 @@ babel_print_v2(netdissect_options *ndo,
                 int parsed_len = 10;
                 ND_PRINT((ndo, "\n\tSS-Update"));
                 if(len < 10) goto invalid;
-                ae = message[2];
-                src_plen = message[3];
-                plen = message[4];
-                omitted = message[5];
+                ae = EXTRACT_U_1(message + 2);
+                src_plen = EXTRACT_U_1(message + 3);
+                plen = EXTRACT_U_1(message + 4);
+                omitted = EXTRACT_U_1(message + 5);
                 interval = EXTRACT_BE_U_2(message + 6);
                 seqno = EXTRACT_BE_U_2(message + 8);
                 metric = EXTRACT_BE_U_2(message + 10);
@@ -647,9 +647,9 @@ babel_print_v2(netdissect_options *ndo,
                 u_char ae, plen, src_plen, prefix[16], src_prefix[16];
                 ND_PRINT((ndo, "\n\tSS-Request "));
                 if(len < 3) goto invalid;
-                ae = message[2];
-                plen = message[3];
-                src_plen = message[4];
+                ae = EXTRACT_U_1(message + 2);
+                plen = EXTRACT_U_1(message + 3);
+                src_plen = EXTRACT_U_1(message + 4);
                 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len,
                                     NULL, len - parsed_len, prefix);
                 if(rc < 0) goto invalid;
@@ -682,11 +682,11 @@ babel_print_v2(netdissect_options *ndo,
                 const u_char *router_id = NULL;
                 ND_PRINT((ndo, "\n\tSS-MH-Request "));
                 if(len < 14) goto invalid;
-                ae = message[2];
-                plen = message[3];
+                ae = EXTRACT_U_1(message + 2);
+                plen = EXTRACT_U_1(message + 3);
                 seqno = EXTRACT_BE_U_2(message + 4);
-                hopc = message[6];
-                src_plen = message[7];
+                hopc = EXTRACT_U_1(message + 6);
+                src_plen = EXTRACT_U_1(message + 7);
                 router_id = message + 8;
                 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len,
                                     NULL, len - parsed_len, prefix);