void ci_udp_handle_force_reuseport(ci_fd_t fd, citp_socket* ep,
const struct sockaddr* sa, socklen_t sa_len)
{
int rc;
if( CITP_OPTS.udp_reuseports != 0 &&
((struct sockaddr_in*)sa)->sin_port != 0 ) {
struct ci_port_list *force_reuseport;
CI_DLLIST_FOR_EACH2(struct ci_port_list, force_reuseport, link,
(ci_dllist*)(ci_uintptr_t)CITP_OPTS.udp_reuseports) {
if( force_reuseport->port == ((struct sockaddr_in*)sa)->sin_port ) {
int one = 1;
ci_fd_t os_sock = ci_get_os_sock_fd(fd);
ci_assert(CI_IS_VALID_SOCKET(os_sock));
rc = ci_sys_setsockopt(os_sock, SOL_SOCKET, SO_REUSEPORT, &one,
sizeof(one));
ci_rel_os_sock_fd(os_sock);
/* Fixme: shouldn't we handle errors? */
if( rc != 0 ) {
log("%s: failed to set SO_REUSEPORT on OS socket: "
"rc=%d errno=%d", __func__, rc, errno);
}
ep->s->s_flags |= CI_SOCK_FLAG_REUSEPORT;
LOG_UC(log("%s "SF_FMT", applied legacy SO_REUSEPORT flag for port %u",
__FUNCTION__, SF_PRI_ARGS(ep, fd), force_reuseport->port));
}
}
}
}
static int
citp_passthrough_setsockopt(citp_fdinfo* fdi, int level, int optname,
const void* optval, socklen_t optlen)
{
int rc = ci_sys_setsockopt(fdi_to_alien_fdi(fdi)->os_socket,
level, optname, optval, optlen);
citp_fdinfo_release_ref(fdi, 0);
return rc;
}
/* In this bind handler we just check that the address to which
* are binding is either "any" or one of ours.
* In the Linux kernel version [fd] is unused.
*/
int ci_tcp_bind(citp_socket* ep, const struct sockaddr* my_addr,
socklen_t addrlen, ci_fd_t fd )
{
struct sockaddr_in* my_addr_in;
ci_uint16 new_port;
ci_uint32 addr_be32;
ci_sock_cmn* s = ep->s;
ci_tcp_state* c = &SOCK_TO_WAITABLE_OBJ(s)->tcp;
int rc;
CHECK_TEP(ep);
my_addr_in = (struct sockaddr_in*) my_addr;
/* Check if state of the socket is OK for bind operation. */
/* \todo Earlier (TS_TCP( epi->tcpep.state )->tcp_source_be16) is used.
* What is better? */
if (my_addr == NULL)
RET_WITH_ERRNO( EINVAL );
if (s->b.state != CI_TCP_CLOSED)
RET_WITH_ERRNO( EINVAL );
if (c->tcpflags & CI_TCPT_FLAG_WAS_ESTAB)
RET_WITH_ERRNO( EINVAL );
if( my_addr->sa_family != s->domain )
RET_WITH_ERRNO( s->domain == PF_INET ? EAFNOSUPPORT : EINVAL );
/* Bug 4884: Windows regularly uses addrlen > sizeof(struct sockaddr_in)
* Linux is also relaxed about overlength data areas. */
if (s->domain == PF_INET && addrlen < sizeof(struct sockaddr_in))
RET_WITH_ERRNO( EINVAL );
#if CI_CFG_FAKE_IPV6
if (s->domain == PF_INET6 && addrlen < SIN6_LEN_RFC2133)
RET_WITH_ERRNO( EINVAL );
if( s->domain == PF_INET6 && !ci_tcp_ipv6_is_ipv4(my_addr) )
return CI_SOCKET_HANDOVER;
#endif
addr_be32 = ci_get_ip4_addr(s->domain, my_addr);
/* Using the port number provided, see if we can do this bind */
new_port = my_addr_in->sin_port;
if( CITP_OPTS.tcp_reuseports != 0 && new_port != 0 ) {
struct ci_port_list *force_reuseport;
CI_DLLIST_FOR_EACH2(struct ci_port_list, force_reuseport, link,
(ci_dllist*)(ci_uintptr_t)CITP_OPTS.tcp_reuseports) {
if( force_reuseport->port == new_port ) {
int one = 1;
ci_fd_t os_sock = ci_get_os_sock_fd(ep, fd);
ci_assert(CI_IS_VALID_SOCKET(os_sock));
rc = ci_sys_setsockopt(os_sock, SOL_SOCKET, SO_REUSEPORT, &one,
sizeof(one));
ci_rel_os_sock_fd(os_sock);
if( rc != 0 && errno == ENOPROTOOPT )
ep->s->s_flags |= CI_SOCK_FLAG_REUSEPORT_LEGACY;
ep->s->s_flags |= CI_SOCK_FLAG_REUSEPORT;
LOG_TC(log("%s "SF_FMT", applied legacy SO_REUSEPORT flag for port %u",
__FUNCTION__, SF_PRI_ARGS(ep, fd), new_port));
}
}
}
if( !(ep->s->s_flags & CI_SOCK_FLAG_REUSEPORT_LEGACY) )
CI_LOGLEVEL_TRY_RET(LOG_TV,
__ci_bind(ep->netif, ep->s, addr_be32, &new_port));
ep->s->s_flags |= CI_SOCK_FLAG_BOUND;
sock_lport_be16(s) = new_port;
sock_laddr_be32(s) = addr_be32;
if( CI_IP_IS_MULTICAST(addr_be32) )
s->cp.ip_laddr_be32 = 0;
else
s->cp.ip_laddr_be32 = addr_be32;
s->cp.lport_be16 = new_port;
sock_rport_be16(s) = sock_raddr_be32(s) = 0;
LOG_TC(log(LPF "bind to %s:%u n_p:%u lp:%u", ip_addr_str(addr_be32),
(unsigned) CI_BSWAP_BE16(my_addr_in->sin_port),
CI_BSWAP_BE16(new_port), CI_BSWAP_BE16(sock_lport_be16(s))));
return 0;
}
