721 lines
16 KiB
C
721 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Author: Justin Iurman (justin.iurman@uliege.be)
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*
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* IOAM tester for IPv6, see ioam6.sh for details on each test case.
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*/
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#include <arpa/inet.h>
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#include <errno.h>
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#include <limits.h>
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#include <linux/const.h>
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#include <linux/if_ether.h>
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#include <linux/ioam6.h>
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#include <linux/ipv6.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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struct ioam_config {
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__u32 id;
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__u64 wide;
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__u16 ingr_id;
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__u16 egr_id;
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__u32 ingr_wide;
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__u32 egr_wide;
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__u32 ns_data;
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__u64 ns_wide;
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__u32 sc_id;
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__u8 hlim;
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char *sc_data;
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};
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/*
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* Be careful if you modify structs below - everything MUST be kept synchronized
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* with configurations inside ioam6.sh and always reflect the same.
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*/
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static struct ioam_config node1 = {
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.id = 1,
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.wide = 11111111,
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.ingr_id = 0xffff, /* default value */
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.egr_id = 101,
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.ingr_wide = 0xffffffff, /* default value */
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.egr_wide = 101101,
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.ns_data = 0xdeadbee0,
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.ns_wide = 0xcafec0caf00dc0de,
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.sc_id = 777,
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.sc_data = "something that will be 4n-aligned",
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.hlim = 64,
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};
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static struct ioam_config node2 = {
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.id = 2,
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.wide = 22222222,
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.ingr_id = 201,
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.egr_id = 202,
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.ingr_wide = 201201,
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.egr_wide = 202202,
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.ns_data = 0xdeadbee1,
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.ns_wide = 0xcafec0caf11dc0de,
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.sc_id = 666,
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.sc_data = "Hello there -Obi",
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.hlim = 63,
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};
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static struct ioam_config node3 = {
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.id = 3,
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.wide = 33333333,
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.ingr_id = 301,
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.egr_id = 0xffff, /* default value */
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.ingr_wide = 301301,
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.egr_wide = 0xffffffff, /* default value */
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.ns_data = 0xdeadbee2,
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.ns_wide = 0xcafec0caf22dc0de,
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.sc_id = 0xffffff, /* default value */
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.sc_data = NULL,
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.hlim = 62,
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};
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enum {
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/**********
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* OUTPUT *
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**********/
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TEST_OUT_UNDEF_NS,
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TEST_OUT_NO_ROOM,
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TEST_OUT_BIT0,
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TEST_OUT_BIT1,
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TEST_OUT_BIT2,
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TEST_OUT_BIT3,
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TEST_OUT_BIT4,
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TEST_OUT_BIT5,
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TEST_OUT_BIT6,
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TEST_OUT_BIT7,
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TEST_OUT_BIT8,
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TEST_OUT_BIT9,
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TEST_OUT_BIT10,
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TEST_OUT_BIT11,
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TEST_OUT_BIT12,
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TEST_OUT_BIT13,
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TEST_OUT_BIT14,
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TEST_OUT_BIT15,
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TEST_OUT_BIT16,
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TEST_OUT_BIT17,
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TEST_OUT_BIT18,
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TEST_OUT_BIT19,
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TEST_OUT_BIT20,
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TEST_OUT_BIT21,
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TEST_OUT_BIT22,
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TEST_OUT_FULL_SUPP_TRACE,
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/*********
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* INPUT *
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*********/
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TEST_IN_UNDEF_NS,
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TEST_IN_NO_ROOM,
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TEST_IN_OFLAG,
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TEST_IN_BIT0,
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TEST_IN_BIT1,
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TEST_IN_BIT2,
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TEST_IN_BIT3,
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TEST_IN_BIT4,
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TEST_IN_BIT5,
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TEST_IN_BIT6,
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TEST_IN_BIT7,
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TEST_IN_BIT8,
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TEST_IN_BIT9,
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TEST_IN_BIT10,
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TEST_IN_BIT11,
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TEST_IN_BIT12,
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TEST_IN_BIT13,
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TEST_IN_BIT14,
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TEST_IN_BIT15,
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TEST_IN_BIT16,
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TEST_IN_BIT17,
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TEST_IN_BIT18,
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TEST_IN_BIT19,
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TEST_IN_BIT20,
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TEST_IN_BIT21,
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TEST_IN_BIT22,
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TEST_IN_FULL_SUPP_TRACE,
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/**********
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* GLOBAL *
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**********/
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TEST_FWD_FULL_SUPP_TRACE,
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__TEST_MAX,
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};
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static int check_ioam_header(int tid, struct ioam6_trace_hdr *ioam6h,
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__u32 trace_type, __u16 ioam_ns)
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{
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if (__be16_to_cpu(ioam6h->namespace_id) != ioam_ns ||
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__be32_to_cpu(ioam6h->type_be32) != (trace_type << 8))
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return 1;
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switch (tid) {
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case TEST_OUT_UNDEF_NS:
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case TEST_IN_UNDEF_NS:
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return ioam6h->overflow ||
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ioam6h->nodelen != 1 ||
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ioam6h->remlen != 1;
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case TEST_OUT_NO_ROOM:
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case TEST_IN_NO_ROOM:
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case TEST_IN_OFLAG:
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return !ioam6h->overflow ||
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ioam6h->nodelen != 2 ||
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ioam6h->remlen != 1;
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case TEST_OUT_BIT0:
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case TEST_IN_BIT0:
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case TEST_OUT_BIT1:
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case TEST_IN_BIT1:
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case TEST_OUT_BIT2:
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case TEST_IN_BIT2:
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case TEST_OUT_BIT3:
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case TEST_IN_BIT3:
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case TEST_OUT_BIT4:
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case TEST_IN_BIT4:
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case TEST_OUT_BIT5:
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case TEST_IN_BIT5:
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case TEST_OUT_BIT6:
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case TEST_IN_BIT6:
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case TEST_OUT_BIT7:
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case TEST_IN_BIT7:
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case TEST_OUT_BIT11:
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case TEST_IN_BIT11:
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return ioam6h->overflow ||
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ioam6h->nodelen != 1 ||
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ioam6h->remlen;
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case TEST_OUT_BIT8:
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case TEST_IN_BIT8:
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case TEST_OUT_BIT9:
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case TEST_IN_BIT9:
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case TEST_OUT_BIT10:
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case TEST_IN_BIT10:
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return ioam6h->overflow ||
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ioam6h->nodelen != 2 ||
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ioam6h->remlen;
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case TEST_OUT_BIT12:
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case TEST_IN_BIT12:
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case TEST_OUT_BIT13:
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case TEST_IN_BIT13:
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case TEST_OUT_BIT14:
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case TEST_IN_BIT14:
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case TEST_OUT_BIT15:
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case TEST_IN_BIT15:
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case TEST_OUT_BIT16:
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case TEST_IN_BIT16:
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case TEST_OUT_BIT17:
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case TEST_IN_BIT17:
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case TEST_OUT_BIT18:
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case TEST_IN_BIT18:
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case TEST_OUT_BIT19:
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case TEST_IN_BIT19:
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case TEST_OUT_BIT20:
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case TEST_IN_BIT20:
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case TEST_OUT_BIT21:
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case TEST_IN_BIT21:
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return ioam6h->overflow ||
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ioam6h->nodelen ||
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ioam6h->remlen != 1;
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case TEST_OUT_BIT22:
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case TEST_IN_BIT22:
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return ioam6h->overflow ||
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ioam6h->nodelen ||
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ioam6h->remlen;
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case TEST_OUT_FULL_SUPP_TRACE:
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case TEST_IN_FULL_SUPP_TRACE:
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case TEST_FWD_FULL_SUPP_TRACE:
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return ioam6h->overflow ||
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ioam6h->nodelen != 15 ||
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ioam6h->remlen;
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default:
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break;
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}
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return 1;
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}
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static int check_ioam6_data(__u8 **p, struct ioam6_trace_hdr *ioam6h,
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const struct ioam_config cnf)
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{
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unsigned int len;
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__u8 aligned;
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__u64 raw64;
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__u32 raw32;
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if (ioam6h->type.bit0) {
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raw32 = __be32_to_cpu(*((__u32 *)*p));
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if (cnf.hlim != (raw32 >> 24) || cnf.id != (raw32 & 0xffffff))
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit1) {
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raw32 = __be32_to_cpu(*((__u32 *)*p));
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if (cnf.ingr_id != (raw32 >> 16) ||
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cnf.egr_id != (raw32 & 0xffff))
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit2)
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*p += sizeof(__u32);
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if (ioam6h->type.bit3)
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*p += sizeof(__u32);
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if (ioam6h->type.bit4) {
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if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit5) {
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if (__be32_to_cpu(*((__u32 *)*p)) != cnf.ns_data)
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit6) {
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if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit7) {
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if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit8) {
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raw64 = __be64_to_cpu(*((__u64 *)*p));
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if (cnf.hlim != (raw64 >> 56) ||
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cnf.wide != (raw64 & 0xffffffffffffff))
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return 1;
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*p += sizeof(__u64);
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}
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if (ioam6h->type.bit9) {
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if (__be32_to_cpu(*((__u32 *)*p)) != cnf.ingr_wide)
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return 1;
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*p += sizeof(__u32);
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if (__be32_to_cpu(*((__u32 *)*p)) != cnf.egr_wide)
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit10) {
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if (__be64_to_cpu(*((__u64 *)*p)) != cnf.ns_wide)
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return 1;
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*p += sizeof(__u64);
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}
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if (ioam6h->type.bit11) {
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if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
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return 1;
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*p += sizeof(__u32);
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}
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if (ioam6h->type.bit22) {
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len = cnf.sc_data ? strlen(cnf.sc_data) : 0;
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aligned = cnf.sc_data ? __ALIGN_KERNEL(len, 4) : 0;
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raw32 = __be32_to_cpu(*((__u32 *)*p));
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if (aligned != (raw32 >> 24) * 4 ||
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cnf.sc_id != (raw32 & 0xffffff))
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return 1;
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*p += sizeof(__u32);
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if (cnf.sc_data) {
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if (strncmp((char *)*p, cnf.sc_data, len))
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return 1;
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*p += len;
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aligned -= len;
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while (aligned--) {
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if (**p != '\0')
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return 1;
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*p += sizeof(__u8);
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}
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}
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}
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return 0;
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}
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static int check_ioam_header_and_data(int tid, struct ioam6_trace_hdr *ioam6h,
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__u32 trace_type, __u16 ioam_ns)
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{
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__u8 *p;
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if (check_ioam_header(tid, ioam6h, trace_type, ioam_ns))
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return 1;
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p = ioam6h->data + ioam6h->remlen * 4;
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switch (tid) {
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case TEST_OUT_BIT0:
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case TEST_OUT_BIT1:
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case TEST_OUT_BIT2:
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case TEST_OUT_BIT3:
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case TEST_OUT_BIT4:
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case TEST_OUT_BIT5:
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case TEST_OUT_BIT6:
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case TEST_OUT_BIT7:
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case TEST_OUT_BIT8:
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case TEST_OUT_BIT9:
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case TEST_OUT_BIT10:
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case TEST_OUT_BIT11:
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case TEST_OUT_BIT22:
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case TEST_OUT_FULL_SUPP_TRACE:
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return check_ioam6_data(&p, ioam6h, node1);
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case TEST_IN_BIT0:
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case TEST_IN_BIT1:
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case TEST_IN_BIT2:
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case TEST_IN_BIT3:
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case TEST_IN_BIT4:
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case TEST_IN_BIT5:
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case TEST_IN_BIT6:
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case TEST_IN_BIT7:
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case TEST_IN_BIT8:
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case TEST_IN_BIT9:
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case TEST_IN_BIT10:
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case TEST_IN_BIT11:
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case TEST_IN_BIT22:
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case TEST_IN_FULL_SUPP_TRACE:
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{
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__u32 tmp32 = node2.egr_wide;
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__u16 tmp16 = node2.egr_id;
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int res;
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node2.egr_id = 0xffff;
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node2.egr_wide = 0xffffffff;
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res = check_ioam6_data(&p, ioam6h, node2);
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node2.egr_id = tmp16;
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node2.egr_wide = tmp32;
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return res;
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}
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case TEST_FWD_FULL_SUPP_TRACE:
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if (check_ioam6_data(&p, ioam6h, node3))
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return 1;
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if (check_ioam6_data(&p, ioam6h, node2))
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return 1;
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return check_ioam6_data(&p, ioam6h, node1);
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default:
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break;
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}
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return 1;
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}
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static int str2id(const char *tname)
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{
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if (!strcmp("out_undef_ns", tname))
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return TEST_OUT_UNDEF_NS;
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if (!strcmp("out_no_room", tname))
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return TEST_OUT_NO_ROOM;
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if (!strcmp("out_bit0", tname))
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return TEST_OUT_BIT0;
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if (!strcmp("out_bit1", tname))
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return TEST_OUT_BIT1;
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if (!strcmp("out_bit2", tname))
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return TEST_OUT_BIT2;
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if (!strcmp("out_bit3", tname))
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return TEST_OUT_BIT3;
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if (!strcmp("out_bit4", tname))
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return TEST_OUT_BIT4;
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if (!strcmp("out_bit5", tname))
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return TEST_OUT_BIT5;
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if (!strcmp("out_bit6", tname))
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return TEST_OUT_BIT6;
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if (!strcmp("out_bit7", tname))
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return TEST_OUT_BIT7;
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if (!strcmp("out_bit8", tname))
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return TEST_OUT_BIT8;
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if (!strcmp("out_bit9", tname))
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return TEST_OUT_BIT9;
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if (!strcmp("out_bit10", tname))
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return TEST_OUT_BIT10;
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if (!strcmp("out_bit11", tname))
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return TEST_OUT_BIT11;
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if (!strcmp("out_bit12", tname))
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return TEST_OUT_BIT12;
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if (!strcmp("out_bit13", tname))
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return TEST_OUT_BIT13;
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if (!strcmp("out_bit14", tname))
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return TEST_OUT_BIT14;
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if (!strcmp("out_bit15", tname))
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return TEST_OUT_BIT15;
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if (!strcmp("out_bit16", tname))
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return TEST_OUT_BIT16;
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if (!strcmp("out_bit17", tname))
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return TEST_OUT_BIT17;
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if (!strcmp("out_bit18", tname))
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return TEST_OUT_BIT18;
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if (!strcmp("out_bit19", tname))
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return TEST_OUT_BIT19;
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if (!strcmp("out_bit20", tname))
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return TEST_OUT_BIT20;
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if (!strcmp("out_bit21", tname))
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return TEST_OUT_BIT21;
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if (!strcmp("out_bit22", tname))
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return TEST_OUT_BIT22;
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if (!strcmp("out_full_supp_trace", tname))
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return TEST_OUT_FULL_SUPP_TRACE;
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if (!strcmp("in_undef_ns", tname))
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return TEST_IN_UNDEF_NS;
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if (!strcmp("in_no_room", tname))
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return TEST_IN_NO_ROOM;
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if (!strcmp("in_oflag", tname))
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return TEST_IN_OFLAG;
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if (!strcmp("in_bit0", tname))
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return TEST_IN_BIT0;
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if (!strcmp("in_bit1", tname))
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return TEST_IN_BIT1;
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if (!strcmp("in_bit2", tname))
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return TEST_IN_BIT2;
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if (!strcmp("in_bit3", tname))
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return TEST_IN_BIT3;
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if (!strcmp("in_bit4", tname))
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return TEST_IN_BIT4;
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if (!strcmp("in_bit5", tname))
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return TEST_IN_BIT5;
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if (!strcmp("in_bit6", tname))
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return TEST_IN_BIT6;
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if (!strcmp("in_bit7", tname))
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return TEST_IN_BIT7;
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if (!strcmp("in_bit8", tname))
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return TEST_IN_BIT8;
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if (!strcmp("in_bit9", tname))
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return TEST_IN_BIT9;
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if (!strcmp("in_bit10", tname))
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return TEST_IN_BIT10;
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if (!strcmp("in_bit11", tname))
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return TEST_IN_BIT11;
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if (!strcmp("in_bit12", tname))
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return TEST_IN_BIT12;
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if (!strcmp("in_bit13", tname))
|
|
return TEST_IN_BIT13;
|
|
if (!strcmp("in_bit14", tname))
|
|
return TEST_IN_BIT14;
|
|
if (!strcmp("in_bit15", tname))
|
|
return TEST_IN_BIT15;
|
|
if (!strcmp("in_bit16", tname))
|
|
return TEST_IN_BIT16;
|
|
if (!strcmp("in_bit17", tname))
|
|
return TEST_IN_BIT17;
|
|
if (!strcmp("in_bit18", tname))
|
|
return TEST_IN_BIT18;
|
|
if (!strcmp("in_bit19", tname))
|
|
return TEST_IN_BIT19;
|
|
if (!strcmp("in_bit20", tname))
|
|
return TEST_IN_BIT20;
|
|
if (!strcmp("in_bit21", tname))
|
|
return TEST_IN_BIT21;
|
|
if (!strcmp("in_bit22", tname))
|
|
return TEST_IN_BIT22;
|
|
if (!strcmp("in_full_supp_trace", tname))
|
|
return TEST_IN_FULL_SUPP_TRACE;
|
|
if (!strcmp("fwd_full_supp_trace", tname))
|
|
return TEST_FWD_FULL_SUPP_TRACE;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int ipv6_addr_equal(const struct in6_addr *a1, const struct in6_addr *a2)
|
|
{
|
|
return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
|
|
(a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
|
|
(a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
|
|
(a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
|
|
}
|
|
|
|
static int get_u32(__u32 *val, const char *arg, int base)
|
|
{
|
|
unsigned long res;
|
|
char *ptr;
|
|
|
|
if (!arg || !*arg)
|
|
return -1;
|
|
res = strtoul(arg, &ptr, base);
|
|
|
|
if (!ptr || ptr == arg || *ptr)
|
|
return -1;
|
|
|
|
if (res == ULONG_MAX && errno == ERANGE)
|
|
return -1;
|
|
|
|
if (res > 0xFFFFFFFFUL)
|
|
return -1;
|
|
|
|
*val = res;
|
|
return 0;
|
|
}
|
|
|
|
static int get_u16(__u16 *val, const char *arg, int base)
|
|
{
|
|
unsigned long res;
|
|
char *ptr;
|
|
|
|
if (!arg || !*arg)
|
|
return -1;
|
|
res = strtoul(arg, &ptr, base);
|
|
|
|
if (!ptr || ptr == arg || *ptr)
|
|
return -1;
|
|
|
|
if (res == ULONG_MAX && errno == ERANGE)
|
|
return -1;
|
|
|
|
if (res > 0xFFFFUL)
|
|
return -1;
|
|
|
|
*val = res;
|
|
return 0;
|
|
}
|
|
|
|
static int (*func[__TEST_MAX])(int, struct ioam6_trace_hdr *, __u32, __u16) = {
|
|
[TEST_OUT_UNDEF_NS] = check_ioam_header,
|
|
[TEST_OUT_NO_ROOM] = check_ioam_header,
|
|
[TEST_OUT_BIT0] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT1] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT2] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT3] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT4] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT5] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT6] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT7] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT8] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT9] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT10] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT11] = check_ioam_header_and_data,
|
|
[TEST_OUT_BIT12] = check_ioam_header,
|
|
[TEST_OUT_BIT13] = check_ioam_header,
|
|
[TEST_OUT_BIT14] = check_ioam_header,
|
|
[TEST_OUT_BIT15] = check_ioam_header,
|
|
[TEST_OUT_BIT16] = check_ioam_header,
|
|
[TEST_OUT_BIT17] = check_ioam_header,
|
|
[TEST_OUT_BIT18] = check_ioam_header,
|
|
[TEST_OUT_BIT19] = check_ioam_header,
|
|
[TEST_OUT_BIT20] = check_ioam_header,
|
|
[TEST_OUT_BIT21] = check_ioam_header,
|
|
[TEST_OUT_BIT22] = check_ioam_header_and_data,
|
|
[TEST_OUT_FULL_SUPP_TRACE] = check_ioam_header_and_data,
|
|
[TEST_IN_UNDEF_NS] = check_ioam_header,
|
|
[TEST_IN_NO_ROOM] = check_ioam_header,
|
|
[TEST_IN_OFLAG] = check_ioam_header,
|
|
[TEST_IN_BIT0] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT1] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT2] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT3] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT4] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT5] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT6] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT7] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT8] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT9] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT10] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT11] = check_ioam_header_and_data,
|
|
[TEST_IN_BIT12] = check_ioam_header,
|
|
[TEST_IN_BIT13] = check_ioam_header,
|
|
[TEST_IN_BIT14] = check_ioam_header,
|
|
[TEST_IN_BIT15] = check_ioam_header,
|
|
[TEST_IN_BIT16] = check_ioam_header,
|
|
[TEST_IN_BIT17] = check_ioam_header,
|
|
[TEST_IN_BIT18] = check_ioam_header,
|
|
[TEST_IN_BIT19] = check_ioam_header,
|
|
[TEST_IN_BIT20] = check_ioam_header,
|
|
[TEST_IN_BIT21] = check_ioam_header,
|
|
[TEST_IN_BIT22] = check_ioam_header_and_data,
|
|
[TEST_IN_FULL_SUPP_TRACE] = check_ioam_header_and_data,
|
|
[TEST_FWD_FULL_SUPP_TRACE] = check_ioam_header_and_data,
|
|
};
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int fd, size, hoplen, tid, ret = 1;
|
|
struct in6_addr src, dst;
|
|
struct ioam6_hdr *opt;
|
|
struct ipv6hdr *ip6h;
|
|
__u8 buffer[400], *p;
|
|
__u16 ioam_ns;
|
|
__u32 tr_type;
|
|
|
|
if (argc != 7)
|
|
goto out;
|
|
|
|
tid = str2id(argv[2]);
|
|
if (tid < 0 || !func[tid])
|
|
goto out;
|
|
|
|
if (inet_pton(AF_INET6, argv[3], &src) != 1 ||
|
|
inet_pton(AF_INET6, argv[4], &dst) != 1)
|
|
goto out;
|
|
|
|
if (get_u32(&tr_type, argv[5], 16) ||
|
|
get_u16(&ioam_ns, argv[6], 0))
|
|
goto out;
|
|
|
|
fd = socket(AF_PACKET, SOCK_DGRAM, __cpu_to_be16(ETH_P_IPV6));
|
|
if (!fd)
|
|
goto out;
|
|
|
|
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
|
|
argv[1], strlen(argv[1])))
|
|
goto close;
|
|
|
|
recv:
|
|
size = recv(fd, buffer, sizeof(buffer), 0);
|
|
if (size <= 0)
|
|
goto close;
|
|
|
|
ip6h = (struct ipv6hdr *)buffer;
|
|
|
|
if (!ipv6_addr_equal(&ip6h->saddr, &src) ||
|
|
!ipv6_addr_equal(&ip6h->daddr, &dst))
|
|
goto recv;
|
|
|
|
if (ip6h->nexthdr != IPPROTO_HOPOPTS)
|
|
goto close;
|
|
|
|
p = buffer + sizeof(*ip6h);
|
|
hoplen = (p[1] + 1) << 3;
|
|
p += sizeof(struct ipv6_hopopt_hdr);
|
|
|
|
while (hoplen > 0) {
|
|
opt = (struct ioam6_hdr *)p;
|
|
|
|
if (opt->opt_type == IPV6_TLV_IOAM &&
|
|
opt->type == IOAM6_TYPE_PREALLOC) {
|
|
p += sizeof(*opt);
|
|
ret = func[tid](tid, (struct ioam6_trace_hdr *)p,
|
|
tr_type, ioam_ns);
|
|
break;
|
|
}
|
|
|
|
p += opt->opt_len + 2;
|
|
hoplen -= opt->opt_len + 2;
|
|
}
|
|
close:
|
|
close(fd);
|
|
out:
|
|
return ret;
|
|
}
|