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selftests/net: psock_snd: Verify sll_pkttype

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Extend do_rx() to take an expected packet type. Existing callers pass -1
to skip the check.

Signed-off-by: Joe Damato <joe@dama.to>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260728160935.4128982-5-joe@dama.to
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Joe Damato
2026-07-28 09:09:29 -07:00
committed by Jakub Kicinski
parent 2544d30c11
commit f5a445d2a2
1 changed files with 14 additions and 3 deletions
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17
tools/testing/selftests/net/psock_snd.c
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@@ -310,10 +310,13 @@ static void check_aux_data(struct cmsghdr *cmsg, int expected_len)
error(1, 0, "cmsg tp_snaplen != %u", expected_len);
}
static void do_rx(int fd, int expected_len, char *expected, bool is_psock)
/* expected_pkttype < 0 skips the sll_pkttype check. */
static void do_rx(int fd, int expected_len, char *expected, bool is_psock,
int expected_pkttype)
{
char cmsg_buf[1024] __attribute__((aligned(8))) = {};
bool aux = is_psock && cfg_aux_data;
struct sockaddr_ll saddr = {};
struct iovec iov = {
.iov_base = rbuf,
.iov_len = sizeof(rbuf),
@@ -328,6 +331,10 @@ static void do_rx(int fd, int expected_len, char *expected, bool is_psock)
msg.msg_control = cmsg_buf;
msg.msg_controllen = sizeof(cmsg_buf);
}
if (is_psock) {
msg.msg_name = &saddr;
msg.msg_namelen = sizeof(saddr);
}
ret = recvmsg(fd, &msg, 0);
if (ret == -1)
@@ -341,6 +348,10 @@ static void do_rx(int fd, int expected_len, char *expected, bool is_psock)
if (aux)
check_aux_data(CMSG_FIRSTHDR(&msg), expected_len);
if (expected_pkttype >= 0 && saddr.sll_pkttype != expected_pkttype)
error(1, 0, "recv: sll_pkttype %d != %d",
saddr.sll_pkttype, expected_pkttype);
fprintf(stderr, "rx: %u\n", ret);
}
@@ -492,11 +503,11 @@ static void run_test(void)
/* BPF filter accepts only this length, vlan changes MAC */
if (cfg_payload_len == DATA_LEN && !cfg_use_vlan) {
do_rx(fds, total_len - sizeof(struct virtio_net_hdr),
tbuf + sizeof(struct virtio_net_hdr), true);
tbuf + sizeof(struct virtio_net_hdr), true, -1);
check_packet_stats(fds, 1);
}
do_rx(fdr, cfg_payload_len, tbuf + total_len - cfg_payload_len, false);
do_rx(fdr, cfg_payload_len, tbuf + total_len - cfg_payload_len, false, -1);
out:
if (close(fds))