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selftest: add a reuseaddr test

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This is to test for a regression introduced by

b9470c2760 ("inet: kill smallest_size and smallest_port")

which introduced a problem with reuseaddr and bind conflicts.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Josef Bacik 2017-09-19 09:51:26 -04:00 committed by Shuah Khan
parent fbcab13d2e
commit 422d8dc6fd
3 changed files with 116 additions and 1 deletions
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1
tools/testing/selftests/net/.gitignore vendored
View File

@ -6,3 +6,4 @@ reuseport_bpf
reuseport_bpf_cpu
reuseport_bpf_numa
reuseport_dualstack
reuseaddr_conflict

2
tools/testing/selftests/net/Makefile
View File

@ -7,7 +7,7 @@ TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh rtnetl
TEST_GEN_FILES = socket
TEST_GEN_FILES += psock_fanout psock_tpacket
TEST_GEN_FILES += reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
TEST_GEN_FILES += reuseport_dualstack msg_zerocopy
TEST_GEN_FILES += reuseport_dualstack msg_zerocopy reuseaddr_conflict
include ../lib.mk

114
tools/testing/selftests/net/reuseaddr_conflict.c Normal file
View File

@ -0,0 +1,114 @@
/*
* Test for the regression introduced by
*
* b9470c27607b ("inet: kill smallest_size and smallest_port")
*
* If we open an ipv4 socket on a port with reuseaddr we shouldn't reset the tb
* when we open the ipv6 conterpart, which is what was happening previously.
*/
#include <errno.h>
#include <error.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#define PORT 9999
int open_port(int ipv6, int any)
{
int fd = -1;
int reuseaddr = 1;
int v6only = 1;
int addrlen;
int ret = -1;
struct sockaddr *addr;
int family = ipv6 ? AF_INET6 : AF_INET;
struct sockaddr_in6 addr6 = {
.sin6_family = AF_INET6,
.sin6_port = htons(PORT),
.sin6_addr = in6addr_any
};
struct sockaddr_in addr4 = {
.sin_family = AF_INET,
.sin_port = htons(PORT),
.sin_addr.s_addr = any ? htonl(INADDR_ANY) : inet_addr("127.0.0.1"),
};
if (ipv6) {
addr = (struct sockaddr*)&addr6;
addrlen = sizeof(addr6);
} else {
addr = (struct sockaddr*)&addr4;
addrlen = sizeof(addr4);
}
if ((fd = socket(family, SOCK_STREAM, IPPROTO_TCP)) < 0) {
perror("socket");
goto out;
}
if (ipv6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&v6only,
sizeof(v6only)) < 0) {
perror("setsockopt IPV6_V6ONLY");
goto out;
}
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
sizeof(reuseaddr)) < 0) {
perror("setsockopt SO_REUSEADDR");
goto out;
}
if (bind(fd, addr, addrlen) < 0) {
perror("bind");
goto out;
}
if (any)
return fd;
if (listen(fd, 1) < 0) {
perror("listen");
goto out;
}
return fd;
out:
close(fd);
return ret;
}
int main(void)
{
int listenfd;
int fd1, fd2;
fprintf(stderr, "Opening 127.0.0.1:%d\n", PORT);
listenfd = open_port(0, 0);
if (listenfd < 0)
error(1, errno, "Couldn't open listen socket");
fprintf(stderr, "Opening INADDR_ANY:%d\n", PORT);
fd1 = open_port(0, 1);
if (fd1 >= 0)
error(1, 0, "Was allowed to create an ipv4 reuseport on a already bound non-reuseport socket");
fprintf(stderr, "Opening in6addr_any:%d\n", PORT);
fd1 = open_port(1, 1);
if (fd1 < 0)
error(1, errno, "Couldn't open ipv6 reuseport");
fprintf(stderr, "Opening INADDR_ANY:%d\n", PORT);
fd2 = open_port(0, 1);
if (fd2 >= 0)
error(1, 0, "Was allowed to create an ipv4 reuseport on a already bound non-reuseport socket");
close(fd1);
fprintf(stderr, "Opening INADDR_ANY:%d after closing ipv6 socket\n", PORT);
fd1 = open_port(0, 1);
if (fd1 >= 0)
error(1, 0, "Was allowed to create an ipv4 reuseport on an already bound non-reuseport socket with no ipv6");
fprintf(stderr, "Success");
return 0;
}