querying socket peer credentials

[Thomas Klausner]

Hi!

wayland 1.24.0 would like to read the credentials of the other side of a socket.

The code for FreeBSD and OpenBSD looks like this:

#if defined(__FreeBSD__)
int
wl_os_socket_peercred(int sockfd, uid_t *uid, gid_t *gid, pid_t *pid)
{
        socklen_t len;
        struct xucred ucred;

        len = sizeof(ucred);
        if (getsockopt(sockfd, SOL_LOCAL, LOCAL_PEERCRED, &ucred, &len) < 0 ||
            ucred.cr_version != XUCRED_VERSION)
                return -1;
        *uid = ucred.cr_uid;
        *gid = ucred.cr_gid;
#if HAVE_XUCRED_CR_PID
        /* Since https://cgit.freebsd.org/src/commit/?id=c5afec6e895a */
        *pid = ucred.cr_pid;
#else
        *pid = 0;
#endif
        return 0;
}
#elif defined(SO_PEERCRED)
int
wl_os_socket_peercred(int sockfd, uid_t *uid, gid_t *gid, pid_t *pid)
{
        socklen_t len;
#if defined(__OpenBSD__)
        struct sockpeercred ucred;
#else
        struct ucred ucred;
#endif

        len = sizeof(ucred);
        if (getsockopt(sockfd, SOL_SOCKET, SO_PEERCRED, &ucred, &len) < 0)
                return -1;
        *uid = ucred.uid;
        *gid = ucred.gid;
        *pid = ucred.pid;
        return 0;
}


but I can't find neither LOCAL_PEERCRED nor SO_PEERCRED in the NetBSD
headers.

Is this supported in NetBSD in a different way, or is it missing this
feature?

 Thomas