Use more the EXTRACT_U_1() macro (40/n)

[tcpdump] / print-cdp.c

diff --git a/print-cdp.c b/print-cdp.c
index 1db0675dbe0df746568c4534f47c1ad6f69e4080..908f55f406daa84ee711615e4fb141106064b3fb 100644 (file)
--- a/print-cdp.c
+++ b/print-cdp.c
@@ -106,7 +106,7 @@ cdp_print(netdissect_options *ndo,
 
        ND_TCHECK2(*tptr, CDP_HEADER_LEN);
        ND_PRINT((ndo, "CDPv%u, ttl: %us", EXTRACT_U_1((tptr + CDP_HEADER_VERSION_OFFSET)),
-                                          *(tptr + CDP_HEADER_TTL_OFFSET)));
+                                          EXTRACT_U_1(tptr + CDP_HEADER_TTL_OFFSET)));
        if (ndo->ndo_vflag)
                ND_PRINT((ndo, ", checksum: 0x%04x (unverified), length %u", EXTRACT_BE_U_2(tptr + CDP_HEADER_CHECKSUM_OFFSET), length));
        tptr += CDP_HEADER_LEN;
@@ -202,7 +202,7 @@ cdp_print(netdissect_options *ndo,
                    case 0x0b: /* Duplex - CDPv2 */
                        if (len < 1)
                            goto trunc;
-                       ND_PRINT((ndo, "%s", *(tptr) ? "full": "half"));
+                       ND_PRINT((ndo, "%s", EXTRACT_U_1(tptr) ? "full": "half"));
                        break;
 
                    /* http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cata/186/2_12_m/english/release/notes/186rn21m.html
@@ -224,12 +224,12 @@ cdp_print(netdissect_options *ndo,
                    case 0x12: /* AVVID trust bitmap - not documented */
                        if (len < 1)
                            goto trunc;
-                       ND_PRINT((ndo, "0x%02x", *(tptr)));
+                       ND_PRINT((ndo, "0x%02x", EXTRACT_U_1(tptr)));
                        break;
                    case 0x13: /* AVVID untrusted port CoS - not documented */
                        if (len < 1)
                            goto trunc;
-                       ND_PRINT((ndo, "0x%02x", *(tptr)));
+                       ND_PRINT((ndo, "0x%02x", EXTRACT_U_1(tptr)));
                        break;
                    case 0x14: /* System Name - not documented */
                        ND_PRINT((ndo, "'"));
@@ -243,7 +243,7 @@ cdp_print(netdissect_options *ndo,
                    case 0x17: /* Physical Location - not documented */
                        if (len < 1)
                            goto trunc;
-                       ND_PRINT((ndo, "0x%02x", *(tptr)));
+                       ND_PRINT((ndo, "0x%02x", EXTRACT_U_1(tptr)));
                        if (len > 1) {
                                ND_PRINT((ndo, "/"));
                                (void)fn_printn(ndo, tptr + 1, len - 1, NULL);
@@ -285,21 +285,21 @@ cdp_print_addr(netdissect_options *ndo,
                0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x86, 0xdd
        };
 
-       ND_TCHECK2(*p, 4);
+       ND_TCHECK_4(p);
        if (p + 4 > endp)
                goto trunc;
        num = EXTRACT_BE_U_4(p);
        p += 4;
 
        while (p < endp && num >= 0) {
-               ND_TCHECK2(*p, 2);
+               ND_TCHECK_2(p);
                if (p + 2 > endp)
                        goto trunc;
                pt = p[0];              /* type of "protocol" field */
                pl = p[1];              /* length of "protocol" field */
                p += 2;
 
-               ND_TCHECK2(p[pl], 2);
+               ND_TCHECK_2(p + pl);
                if (p + pl + 2 > endp)
                        goto trunc;
                al = EXTRACT_BE_U_2(p + pl);    /* address length */
@@ -312,7 +312,7 @@ cdp_print_addr(netdissect_options *ndo,
                         */
                        p += 3;
 
-                       ND_TCHECK2(*p, 4);
+                       ND_TCHECK_4(p);
                        if (p + 4 > endp)
                                goto trunc;
                        ND_PRINT((ndo, "IPv4 (%u) %s", num, ipaddr_string(ndo, p)));
@@ -346,7 +346,7 @@ cdp_print_addr(netdissect_options *ndo,
                                ND_PRINT((ndo, " %02x", EXTRACT_U_1(p)));
                                p++;
                        }
-                       ND_TCHECK2(*p, 2);
+                       ND_TCHECK_2(p);
                        if (p + 2 > endp)
                                goto trunc;
                        ND_PRINT((ndo, ", al=%d, a=", al));
@@ -381,7 +381,9 @@ cdp_print_prefixes(netdissect_options *ndo,
        ND_PRINT((ndo, " IPv4 Prefixes (%d):", l / 5));
 
        while (l > 0) {
-               ND_PRINT((ndo, " %u.%u.%u.%u/%u", p[0], p[1], p[2], p[3], p[4]));
+               ND_PRINT((ndo, " %u.%u.%u.%u/%u",
+                         EXTRACT_U_1(p), EXTRACT_U_1(p + 1), EXTRACT_U_1(p + 2),
+                         EXTRACT_U_1(p + 3), EXTRACT_U_1(p + 4)));
                l -= 5;
                p += 5;
        }