static int bgp_listener(int sock, struct sockaddr *sa, socklen_t salen,
struct bgp *bgp)
{
struct bgp_listener *listener;
int ret, en;
sockopt_reuseaddr(sock);
sockopt_reuseport(sock);
frr_elevate_privs(&bgpd_privs) {
#ifdef IPTOS_PREC_INTERNETCONTROL
if (sa->sa_family == AF_INET)
setsockopt_ipv4_tos(sock, IPTOS_PREC_INTERNETCONTROL);
else if (sa->sa_family == AF_INET6)
setsockopt_ipv6_tclass(sock,
IPTOS_PREC_INTERNETCONTROL);
#endif
sockopt_v6only(sa->sa_family, sock);
ret = bind(sock, sa, salen);
en = errno;
}
if (ret < 0) {
flog_err_sys(EC_LIB_SOCKET, "bind: %s", safe_strerror(en));
return ret;
}
ret = listen(sock, SOMAXCONN);
if (ret < 0) {
flog_err_sys(EC_LIB_SOCKET, "listen: %s", safe_strerror(errno));
return ret;
}
listener = XCALLOC(MTYPE_BGP_LISTENER, sizeof(*listener));
listener->fd = sock;
/* this socket needs a change of ns. record bgp back pointer */
if (bgp->vrf_id != VRF_DEFAULT && vrf_is_backend_netns())
listener->bgp = bgp;
memcpy(&listener->su, sa, salen);
listener->thread = NULL;
thread_add_read(bm->master, bgp_accept, listener, sock,
&listener->thread);
listnode_add(bm->listen_sockets, listener);
return 0;
}
static int
bgp_listener (int sock, struct sockaddr *sa, socklen_t salen)
{
struct bgp_listener *listener;
int ret, en;
sockopt_reuseaddr (sock);
sockopt_reuseport (sock);
if (bgpd_privs.change (ZPRIVS_RAISE))
zlog_err ("%s: could not raise privs", __func__);
#ifdef IPTOS_PREC_INTERNETCONTROL
if (sa->sa_family == AF_INET)
setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL);
# ifdef HAVE_IPV6
else if (sa->sa_family == AF_INET6)
setsockopt_ipv6_tclass (sock, IPTOS_PREC_INTERNETCONTROL);
# endif
#endif
sockopt_v6only (sa->sa_family, sock);
ret = bind (sock, sa, salen);
en = errno;
if (bgpd_privs.change (ZPRIVS_LOWER))
zlog_err ("%s: could not lower privs", __func__);
if (ret < 0)
{
zlog_err ("bind: %s", safe_strerror (en));
return ret;
}
ret = listen (sock, 3);
if (ret < 0)
{
zlog_err ("listen: %s", safe_strerror (errno));
return ret;
}
listener = XMALLOC (MTYPE_BGP_LISTENER, sizeof(*listener));
listener->fd = sock;
memcpy(&listener->su, sa, salen);
listener->thread = thread_add_read (master, bgp_accept, listener, sock);
listnode_add (bm->listen_sockets, listener);
return 0;
}
