On Sun, Oct 26, 2025 at 11:16:49PM +0530, Ankit Khushwaha wrote:

Socket APIs like recvfrom(), accept(), and getsockname() expect socklen_t* arg, but tests were using int variables. This causes -Wpointer-sign warnings on platforms where socklen_t is unsigned.

Change the variable type from int to socklen_t to resolve the warning and ensure type safety across platforms.

warning fixed:

sctp_collision.c:62:70: warning: passing 'int *' to parameter of type 'socklen_t *' (aka 'unsigned int *') converts between pointers to integer types with different sign [-Wpointer-sign] 62 | ret = recvfrom(sd, buf, sizeof(buf), 0, (struct sockaddr *)&daddr, &len); | ^~~~ /usr/include/sys/socket.h:165:27: note: passing argument to parameter '__addr_len' here 165 | socklen_t *__restrict __addr_len); | ^

Signed-off-by: Ankit Khushwaha ankitkhushwaha.linux@gmail.com

tools/testing/selftests/net/netfilter/sctp_collision.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/netfilter/sctp_collision.c b/tools/testing/selftests/net/netfilter/sctp_collision.c index 21bb1cfd8a85..91df996367e9 100644 --- a/tools/testing/selftests/net/netfilter/sctp_collision.c +++ b/tools/testing/selftests/net/netfilter/sctp_collision.c @@ -9,7 +9,8 @@ int main(int argc, char *argv[]) { struct sockaddr_in saddr = {}, daddr = {};

• int sd, ret, len = sizeof(daddr);

• int sd, ret;
• socklen_t len = sizeof(daddr); struct timeval tv = {25, 0}; char buf[] = "hello";

Hi Ankit,

Please preserve reverse xmas tree order - longest line to shortest - for local variable declarations in Networking code.

In this case, I think that would be as follows (completely untested).

struct sockaddr_in saddr = {}, daddr = {}; socklen_t len = sizeof(daddr); struct timeval tv = {25, 0}; char buf[] = "hello"; int sd, ret;

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