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selftests/bpf: Migrate wildcard destination rewrite test

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Migrate test case from bpf/test_sock_addr.c ensuring that sendmsg
respects when sendmsg6 hooks rewrite the destination IP with the IPv6
wildcard IP, [::].

Signed-off-by: Jordan Rife <jrife@google.com>
Link: https://lore.kernel.org/r/20240510190246.3247730-10-jrife@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jordan Rife 2024-05-10 14:02:26 -05:00 committed by Alexei Starovoitov
parent 54462e8452
commit 8eaf8056a4
3 changed files with 37 additions and 20 deletions
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17
tools/testing/selftests/bpf/prog_tests/sock_addr.c
View File

@ -448,6 +448,7 @@ BPF_SKEL_FUNCS(sendmsg6_prog, sendmsg_v6_prog);
BPF_SKEL_FUNCS(sendmsg6_prog, sendmsg_v6_deny_prog);
BPF_SKEL_FUNCS(sendmsg6_prog, sendmsg_v6_preserve_dst_prog);
BPF_SKEL_FUNCS(sendmsg6_prog, sendmsg_v6_v4mapped_prog);
BPF_SKEL_FUNCS(sendmsg6_prog, sendmsg_v6_wildcard_prog);
BPF_SKEL_FUNCS(sendmsg_unix_prog, sendmsg_unix_prog);
BPF_SKEL_FUNCS(recvmsg4_prog, recvmsg4_prog);
BPF_SKEL_FUNCS(recvmsg6_prog, recvmsg6_prog);
@ -849,6 +850,22 @@ static struct sock_addr_test tests[] = {
SRC6_REWRITE_IP,
SYSCALL_ENOTSUPP,
},
{
SOCK_ADDR_TEST_SENDMSG,
"sendmsg6: sendmsg dst IP = [::] (BSD'ism) (dgram)",
sendmsg_v6_wildcard_prog_load,
sendmsg_v6_wildcard_prog_destroy,
BPF_CGROUP_UDP6_SENDMSG,
&user_ops,
AF_INET6,
SOCK_DGRAM,
SERV6_IP,
SERV6_PORT,
SERV6_REWRITE_IP,
SERV6_REWRITE_PORT,
SRC6_REWRITE_IP,
SUCCESS,
},
{
SOCK_ADDR_TEST_SENDMSG,
"sendmsg_unix: sendmsg (dgram)",

20
tools/testing/selftests/bpf/progs/sendmsg6_prog.c
View File

@ -84,6 +84,26 @@ int sendmsg_v6_v4mapped_prog(struct bpf_sock_addr *ctx)
return 1;
}
SEC("cgroup/sendmsg6")
int sendmsg_v6_wildcard_prog(struct bpf_sock_addr *ctx)
{
/* Rewrite source. */
ctx->msg_src_ip6[0] = bpf_htonl(SRC_REWRITE_IP6_0);
ctx->msg_src_ip6[1] = bpf_htonl(SRC_REWRITE_IP6_1);
ctx->msg_src_ip6[2] = bpf_htonl(SRC_REWRITE_IP6_2);
ctx->msg_src_ip6[3] = bpf_htonl(SRC_REWRITE_IP6_3);
/* Rewrite destination. */
ctx->user_ip6[0] = bpf_htonl(0);
ctx->user_ip6[1] = bpf_htonl(0);
ctx->user_ip6[2] = bpf_htonl(0);
ctx->user_ip6[3] = bpf_htonl(0);
ctx->user_port = bpf_htons(DST_REWRITE_PORT6);
return 1;
}
SEC("cgroup/sendmsg6")
int sendmsg_v6_preserve_dst_prog(struct bpf_sock_addr *ctx)
{

20
tools/testing/selftests/bpf/test_sock_addr.c
View File

@ -94,7 +94,6 @@ static int connect4_prog_load(const struct sock_addr_test *test);
static int connect6_prog_load(const struct sock_addr_test *test);
static int sendmsg4_rw_asm_prog_load(const struct sock_addr_test *test);
static int sendmsg6_rw_asm_prog_load(const struct sock_addr_test *test);
static int sendmsg6_rw_wildcard_prog_load(const struct sock_addr_test *test);
static struct sock_addr_test tests[] = {
/* bind */
@ -298,20 +297,6 @@ static struct sock_addr_test tests[] = {
SRC6_REWRITE_IP,
SUCCESS,
},
{
"sendmsg6: set dst IP = [::] (BSD'ism)",
sendmsg6_rw_wildcard_prog_load,
BPF_CGROUP_UDP6_SENDMSG,
BPF_CGROUP_UDP6_SENDMSG,
AF_INET6,
SOCK_DGRAM,
SERV6_IP,
SERV6_PORT,
SERV6_REWRITE_IP,
SERV6_REWRITE_PORT,
SRC6_REWRITE_IP,
SUCCESS,
},
};
static int load_insns(const struct sock_addr_test *test,
@ -497,11 +482,6 @@ static int sendmsg6_rw_asm_prog_load(const struct sock_addr_test *test)
return sendmsg6_rw_dst_asm_prog_load(test, SERV6_REWRITE_IP);
}
static int sendmsg6_rw_wildcard_prog_load(const struct sock_addr_test *test)
{
return sendmsg6_rw_dst_asm_prog_load(test, WILDCARD6_IP);
}
static int cmp_addr(const struct sockaddr_storage *addr1,
const struct sockaddr_storage *addr2, int cmp_port)
{