diff --git a/gtests/net/packetdrill/run_system_call.c b/gtests/net/packetdrill/run_system_call.c
index 7081003d1dbfcd2f3b6dc3f9399872044957b164..acfcdc7798cabd0284b975d4b6ac6d0800b12d8e 100644
--- a/gtests/net/packetdrill/run_system_call.c
+++ b/gtests/net/packetdrill/run_system_call.c
@@ -4053,6 +4053,85 @@ static int syscall_sctp_send(struct state *state, struct syscall_spec *syscall,
#endif
}
+static int syscall_sctp_sendx(struct state *state, struct syscall_spec *syscall,
+ struct expression_list *args,
+ char **error)
+{
+#if defined(__FreeBSD__) || defined(linux)
+ int script_fd, live_fd, flags, addrcnt, result;
+ size_t len;
+ void *msg = NULL;
+ struct sockaddr *addrs = NULL;
+ struct sctp_sndrcvinfo info;
+ struct expression *info_expr, *len_expr, *addrs_expr;
+
+ if (check_arg_count(args, 7, error))
+ return STATUS_ERR;
+ if (s32_arg(args, 0, &script_fd, error))
+ return STATUS_ERR;
+ if (to_live_fd(state, script_fd, &live_fd, error))
+ return STATUS_ERR;
+ if (ellipsis_arg(args, 1, error))
+ return STATUS_ERR;
+ len_expr = get_arg(args, 2, error);
+ if (get_u32(len_expr, &len, error)) {
+ return STATUS_ERR;
+ }
+ addrs_expr = get_arg(args, 3, error);
+ if (addrs_expr->type == EXPR_NULL) {
+ addrs = NULL;
+ } else if (addrs_expr->type == EXPR_SOCKET_ADDRESS_IPV4 ||
+ addrs_expr->type == EXPR_SOCKET_ADDRESS_IPV6 ||
+ addrs_expr->type == EXPR_ELLIPSIS) {
+ addrs = malloc(sizeof(struct sockaddr_storage));
+ get_sockstorage_arg(addrs_expr, (struct sockaddr_storage *)addrs, live_fd);
+ } else if (addrs_expr->type == EXPR_LIST) {
+ size_t size;
+ if (get_sockaddr_from_list(addrs_expr, &size, &addrs, error)) {
+ goto error_out;
+ }
+ } else {
+ goto error_out;
+ }
+ if (s32_arg(args, 4, &addrcnt, error))
+ goto error_out;
+ info_expr = get_arg(args, 5, error);
+ if (check_type(info_expr, EXPR_SCTP_SNDRCVINFO, error)) {
+ goto error_out;
+ }
+ if (parse_expression_to_sctp_sndrcvinfo(info_expr, &info, true, error)) {
+ goto error_out;
+ }
+ if (s32_arg(args, 6, &flags, error)) {
+ goto error_out;
+ }
+ msg = calloc(len, 1);
+ assert(msg != NULL);
+
+ begin_syscall(state, syscall);
+
+ result = sctp_sendx(live_fd, msg, len, addrs, addrcnt, &info, flags);
+
+ if (end_syscall(state, syscall, CHECK_EXACT, result, error)) {
+ goto error_out;
+ }
+ if (check_sctp_sndrcvinfo(info_expr->value.sctp_sndrcvinfo, &info, error)) {
+ goto error_out;
+ }
+
+ free(msg);
+ free(addrs);
+ return STATUS_OK;
+error_out:
+ free(msg);
+ free(addrs);
+ return STATUS_ERR;
+#else
+ asprintf(error, "sctp_send is not supported");
+ return STATUS_ERR;
+#endif
+}
+
static int syscall_sctp_sendv(struct state *state, struct syscall_spec *syscall,
struct expression_list *args,
@@ -4966,6 +5045,7 @@ struct system_call_entry system_call_table[] = {
{"setsockopt", syscall_setsockopt},
{"poll", syscall_poll},
{"sctp_send", syscall_sctp_send},
+ {"sctp_sendx", syscall_sctp_sendx},
{"sctp_sendmsg", syscall_sctp_sendmsg},
{"sctp_recvmsg", syscall_sctp_recvmsg},
{"sctp_sendv", syscall_sctp_sendv},
diff --git a/gtests/net/packetdrill/tests/bsd/sctp/sctp_sendx.pkt b/gtests/net/packetdrill/tests/bsd/sctp/sctp_sendx.pkt
new file mode 100644
index 0000000000000000000000000000000000000000..20b4eb9a6734766192c57c6cb71147925d9dbd43
--- /dev/null
+++ b/gtests/net/packetdrill/tests/bsd/sctp/sctp_sendx.pkt
@@ -0,0 +1,65 @@
+--tolerance_usecs=100000
+
+ 0.0 socket(..., SOCK_STREAM, IPPROTO_SCTP) = 3
++0.0 fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
++0.0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
++0.0 bind(3, ..., ...) = 0
+// Check the handshake with an empty(!) cookie
++0.1 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
++0.0 > sctp: INIT[flgs=0, tag=1, a_rwnd=..., os=..., is=..., tsn=1, ...]
++0.1 < sctp: INIT_ACK[flgs=0, tag=2, a_rwnd=1500, os=16, is=16, tsn=1, STATE_COOKIE[len=4, val=...]]
++0.0 > sctp: COOKIE_ECHO[flgs=0, len=4, val=...]
++0.1 < sctp: COOKIE_ACK[flgs=0]
++0.0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
+//sendmsg(sd, msghdr, flags)
+
++0.0 setsockopt(3, IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS, {spp_address={sa_family=AF_INET, sin_port=htons(8080), sin_addr=inet_addr("192.0.2.1")},
+spp_hbinterval=0, spp_pathmaxrxt=8, spp_pathmtu=1468, spp_flags=SPP_HB_DISABLE, spp_ipv6_flowlabel=0, spp_dscp=0}, 152) = 0
+
++1.0 sctp_sendx(3, ..., 1000, ..., 1, {sinfo_stream=3,
+ sinfo_ssn=3,
+ sinfo_flags=0,
+ sinfo_ppid=htonl(1234),
+ sinfo_context=0,
+ sinfo_timetolive=0,
+ sinfo_tsn=2,
+ sinfo_cumtsn=2,
+ sinfo_assoc_id=3}, 0) = 1000
+* > sctp: DATA[flgs=BE, len=1016, tsn=1, sid=3, ssn=0, ppid=1234]
++0.0 < sctp: SACK[flgs=0, cum_tsn=1, a_rwnd=1500, gaps=[], dups=[]]
+
+
++1.0 sctp_sendx(3, ..., 1000, {sa_family=AF_INET,
+ sin_port=htons(8080),
+ sin_addr=inet_addr("192.0.2.1")}, 1,
+ {sinfo_stream=3,
+ sinfo_ssn=3,
+ sinfo_flags=0,
+ sinfo_ppid=htonl(7),
+ sinfo_context=0,
+ sinfo_timetolive=0,
+ sinfo_tsn=1,
+ sinfo_cumtsn=6,
+ sinfo_assoc_id=3}, 0) = 1000
+* > sctp: DATA[flgs=BE, len=1016, tsn=2, sid=3, ssn=1, ppid=7]
++0.0 < sctp: SACK[flgs=0, cum_tsn=2, a_rwnd=1500, gaps=[], dups=[]]
+
++1.0 sctp_sendx(3, ..., 1000, [{sa_family=AF_INET,
+ sin_port=htons(8080),
+ sin_addr=inet_addr("192.0.2.1")}], 1,
+ {sinfo_stream=3,
+ sinfo_ssn=3,
+ sinfo_flags=0,
+ sinfo_ppid=htonl(7),
+ sinfo_context=0,
+ sinfo_timetolive=0,
+ sinfo_tsn=1,
+ sinfo_cumtsn=6,
+ sinfo_assoc_id=3}, 0) = 1000
+* > sctp: DATA[flgs=BE, len=1016, tsn=3, sid=3, ssn=2, ppid=7]
++0.0 < sctp: SACK[flgs=0, cum_tsn=3, a_rwnd=1500, gaps=[], dups=[]]
+
++0.0 close(3) = 0
++0.0 > sctp: SHUTDOWN[flgs=0, cum_tsn=0]
++0.1 < sctp: SHUTDOWN_ACK[flgs=0]
++0.0 > sctp: SHUTDOWN_COMPLETE[flgs=0]