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Use ND_TCHECK_32BITS() before EXTRACT_32BITS().

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It makes it a bit clearer what's being done.
This commit is contained in:
Guy Harris 2017-01-15 10:42:29 -08:00 committed by Francois-Xavier Le Bail
parent f152c1268f
commit 892603ab28
1 changed files with 3 additions and 3 deletions
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6
print-udp.c
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@ -185,7 +185,7 @@ rtp_print(netdissect_options *ndo, const void *hdr, u_int len,
if (hasopt) {
u_int i2, optlen;
do {
ND_TCHECK2(*ip, 4);
ND_TCHECK_32BITS(ip);
i2 = EXTRACT_32BITS(ip);
optlen = (i2 >> 16) & 0xff;
if (optlen == 0 || optlen > len) {
@ -198,7 +198,7 @@ rtp_print(netdissect_options *ndo, const void *hdr, u_int len,
}
if (hasext) {
u_int i2, extlen;
ND_TCHECK2(*ip, 4);
ND_TCHECK_32BITS(ip);
i2 = EXTRACT_32BITS(ip);
extlen = (i2 & 0xffff) + 1;
if (extlen > len) {
@ -207,7 +207,7 @@ rtp_print(netdissect_options *ndo, const void *hdr, u_int len,
}
ip += extlen;
}
ND_TCHECK(*ip);
ND_TCHECK_32BITS(ip);
if (contype == 0x1f) /*XXX H.261 */
ND_PRINT((ndo, " 0x%04x", EXTRACT_32BITS(ip) >> 16));
}