Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
44 lines
883 B
C
Executable File
44 lines
883 B
C
Executable File
/* $Id: inet6_opt_find.c 1.4 04/02/23 18:46:18+02:00 vnuorval@dsl-hkigw1c53.dial.inet.fi $ */
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/* This is a substitute for a missing inet6_opt_find(). */
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#include <stddef.h>
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#include <netinet/in.h>
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#ifndef IP6OPT_PAD1
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#define IP6OPT_PAD1 0
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#endif
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int inet6_opt_find(void *extbuf, socklen_t extlen, int offset,
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uint8_t type, socklen_t *lenp,
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void **databufp)
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{
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uint8_t *optp, *tailp;
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optp = (uint8_t *)extbuf;
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if (extlen < 2 || extlen <= offset || extlen < ((optp[1] + 1) << 3))
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return -1;
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tailp = optp + extlen;
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optp += (2 + offset);
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while (optp <= tailp) {
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if (optp[0] == IP6OPT_PAD1) {
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optp++;
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continue;
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}
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if (optp + optp[1] + 2 > tailp)
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return -1;
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if (optp[0] == type) {
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*databufp = optp + 2;
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*lenp = optp[1];
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return *lenp + (uint8_t *)optp - (uint8_t *)extbuf;
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}
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optp += (2 + optp[1]);
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}
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*databufp = NULL;
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return -1;
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}
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