From a22982c39eb1d68914c8b541e7ef10044c5f1b1e Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 16 Feb 2022 17:21:20 -0800 Subject: [PATCH] selftests: net: basic test for IPV6_2292* Add a basic test to make sure ping sockets don't crash with IPV6_2292* options. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller --- tools/testing/selftests/net/cmsg_ipv6.sh | 9 +++++++ tools/testing/selftests/net/cmsg_sender.c | 33 ++++++++++++++++++++++- 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/cmsg_ipv6.sh b/tools/testing/selftests/net/cmsg_ipv6.sh index e42c36e0d741..2d89cb0ad288 100755 --- a/tools/testing/selftests/net/cmsg_ipv6.sh +++ b/tools/testing/selftests/net/cmsg_ipv6.sh @@ -137,6 +137,15 @@ for ovr in setsock cmsg both diff; do done done +# IPV6 exthdr +for p in u i r; do + # Very basic "does it crash" test + for h in h d r; do + $NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234 + check_result $? 0 "ExtHdr $prot $ovr - pass" + done +done + # Summary if [ $BAD -ne 0 ]; then echo "FAIL - $BAD/$TOTAL cases failed" diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c index 6136aa7df1c4..aed7845c08a8 100644 --- a/tools/testing/selftests/net/cmsg_sender.c +++ b/tools/testing/selftests/net/cmsg_sender.c @@ -66,6 +66,7 @@ struct options { struct option_cmsg_u32 dontfrag; struct option_cmsg_u32 tclass; struct option_cmsg_u32 hlimit; + struct option_cmsg_u32 exthdr; } v6; } opt = { .size = 13, @@ -99,6 +100,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin) "\t\t-C val Set TCLASS via setsockopt\n" "\t\t-l val Set HOPLIMIT via cmsg\n" "\t\t-L val Set HOPLIMIT via setsockopt\n" + "\t\t-H type Add an IPv6 header option\n" + "\t\t (h = HOP; d = DST; r = RTDST)" ""); exit(ERN_HELP); } @@ -107,7 +110,7 @@ static void cs_parse_args(int argc, char *argv[]) { char o; - while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:l:L:")) != -1) { + while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:l:L:H:")) != -1) { switch (o) { case 's': opt.silent_send = true; @@ -169,6 +172,23 @@ static void cs_parse_args(int argc, char *argv[]) case 'L': opt.sockopt.hlimit = atoi(optarg); break; + case 'H': + opt.v6.exthdr.ena = true; + switch (optarg[0]) { + case 'h': + opt.v6.exthdr.val = IPV6_HOPOPTS; + break; + case 'd': + opt.v6.exthdr.val = IPV6_DSTOPTS; + break; + case 'r': + opt.v6.exthdr.val = IPV6_RTHDRDSTOPTS; + break; + default: + printf("Error: hdr type: %s\n", optarg); + break; + } + break; } } @@ -272,6 +292,17 @@ cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz) *(__u32 *)CMSG_DATA(cmsg) = SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE; } + if (opt.v6.exthdr.ena) { + cmsg = (struct cmsghdr *)(cbuf + cmsg_len); + cmsg_len += CMSG_SPACE(8); + if (cbuf_sz < cmsg_len) + error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small"); + + cmsg->cmsg_level = SOL_IPV6; + cmsg->cmsg_type = opt.v6.exthdr.val; + cmsg->cmsg_len = CMSG_LEN(8); + *(__u64 *)CMSG_DATA(cmsg) = 0; + } if (cmsg_len) msg->msg_controllen = cmsg_len;