xsock_t
comm_connect_unix(const char* path, int is_blocking)
{
xsock_t sock;
struct sockaddr_un s_un;
comm_init();
if (comm_unix_setup(&s_un, path) == -1)
return (XORP_BAD_SOCKET);
sock = comm_sock_open(s_un.sun_family, SOCK_STREAM, 0, is_blocking);
if (sock == XORP_BAD_SOCKET)
return (XORP_BAD_SOCKET);
if (connect(sock, (struct sockaddr*) &s_un, sizeof(s_un)) == -1) {
_comm_set_serrno();
if (is_blocking || comm_get_last_error() != EINPROGRESS) {
XLOG_ERROR("Error connecting to unix socket. Path: %s. Error: %s",
s_un.sun_path, comm_get_error_str(comm_get_last_error()));
comm_sock_close(sock);
return (XORP_BAD_SOCKET);
}
}
return (sock);
}
int
comm_set_multicast_ttl(xsock_t sock, int val)
{
int family = comm_sock_get_family(sock);
switch (family) {
case AF_INET:
{
/* XXX: Most platforms now use int for this option;
* legacy BSD specified u_char.
*/
u_char ip_multicast_ttl = val;
if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_TTL,
XORP_SOCKOPT_CAST(&ip_multicast_ttl),
sizeof(ip_multicast_ttl)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IP_MULTICAST_TTL %u: %s",
ip_multicast_ttl,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
break;
}
#ifdef HAVE_IPV6
case AF_INET6:
{
int ip_multicast_ttl = val;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
XORP_SOCKOPT_CAST(&ip_multicast_ttl),
sizeof(ip_multicast_ttl)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IPV6_MULTICAST_HOPS %u: %s",
ip_multicast_ttl,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
break;
}
#endif /* HAVE_IPV6 */
default:
XLOG_FATAL("Error %s setsockopt IP_MULTICAST_TTL/IPV6_MULTICAST_HOPS "
"on socket %d: invalid family = %d",
(val)? "set": "reset", sock, family);
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_set_receive_broadcast(xsock_t sock, int val)
{
#if defined(HOST_OS_WINDOWS) && defined(IP_RECEIVE_BROADCAST)
/*
* With Windows Server 2003 and later, you have to explicitly
* ask to receive broadcast packets.
*/
DWORD ip_rx_bcast = (DWORD)val;
if (setsockopt(sock, IPPROTO_IP, IP_RECEIVE_BROADCAST,
XORP_SOCKOPT_CAST(&ip_rx_bcast),
sizeof(ip_rx_bcast)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error %s IP_RECEIVE_BROADCAST on socket %d: %s",
(val)? "set": "reset", sock,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else
UNUSED(sock);
UNUSED(val);
return (XORP_OK);
#endif
}
int
comm_set_linger(xsock_t sock, int enabled, int secs)
{
#ifdef SO_LINGER
struct linger l;
l.l_onoff = enabled;
l.l_linger = secs;
if (setsockopt(sock, SOL_SOCKET, SO_LINGER,
XORP_SOCKOPT_CAST(&l), sizeof(l)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error %s SO_LINGER %ds on socket %d: %s",
(enabled)? "set": "reset", secs, sock,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! SO_LINGER */
UNUSED(sock);
UNUSED(enabled);
UNUSED(secs);
XLOG_WARNING("SO_LINGER Undefined!");
return (XORP_ERROR);
#endif /* ! SO_LINGER */
}
int
comm_set_onesbcast(xsock_t sock, int enabled)
{
#ifdef IP_ONESBCAST
int family = comm_sock_get_family(sock);
if (family != AF_INET) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET);
return (XORP_ERROR);
}
if (setsockopt(sock, IPPROTO_IP, IP_ONESBCAST,
XORP_SOCKOPT_CAST(&enabled), sizeof(enabled)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IP_ONESBCAST %d: %s", enabled,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! IP_ONESBCAST */
XLOG_ERROR("setsockopt IP_ONESBCAST %u: %s", enabled,
"IP_ONESBCAST support not present.");
UNUSED(sock);
UNUSED(enabled);
return (XORP_ERROR);
#endif /* ! IP_ONESBCAST */
}
int
comm_set_iface6(xsock_t sock, unsigned int my_ifindex)
{
#ifdef HAVE_IPV6
int family = comm_sock_get_family(sock);
if (family != AF_INET6) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET6);
return (XORP_ERROR);
}
if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_IF,
XORP_SOCKOPT_CAST(&my_ifindex), sizeof(my_ifindex)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IPV6_MULTICAST_IF for interface index %d: %s",
my_ifindex, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! HAVE_IPV6 */
comm_sock_no_ipv6("comm_set_iface6", sock, my_ifindex);
return (XORP_ERROR);
#endif /* ! HAVE_IPV6 */
}
int
comm_set_iface4(xsock_t sock, const struct in_addr *in_addr)
{
int family = comm_sock_get_family(sock);
struct in_addr my_addr;
if (family != AF_INET) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET);
return (XORP_ERROR);
}
if (in_addr != NULL)
my_addr.s_addr = in_addr->s_addr;
else
my_addr.s_addr = INADDR_ANY;
if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_IF,
XORP_SOCKOPT_CAST(&my_addr), sizeof(my_addr)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IP_MULTICAST_IF %s: %s",
(in_addr)? inet_ntoa(my_addr) : "ANY",
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_sock_set_blocking(xsock_t sock, int is_blocking)
{
#ifdef HOST_OS_WINDOWS
u_long opt;
int flags;
if (is_blocking)
opt = 0;
else
opt = 1;
flags = ioctlsocket(sock, FIONBIO, &opt);
if (flags != 0) {
_comm_set_serrno();
XLOG_ERROR("FIONBIO error: %s",
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
#else /* ! HOST_OS_WINDOWS */
int flags;
if ( (flags = fcntl(sock, F_GETFL, 0)) < 0) {
_comm_set_serrno();
XLOG_ERROR("F_GETFL error: %s",
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
if (is_blocking)
flags &= ~O_NONBLOCK;
else
flags |= O_NONBLOCK;
if (fcntl(sock, F_SETFL, flags) < 0) {
_comm_set_serrno();
XLOG_ERROR("F_SETFL error: %s",
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
#endif /* ! HOST_OS_WINDOWS */
return (XORP_OK);
}
int
comm_set_loopback(xsock_t sock, int val)
{
int family = comm_sock_get_family(sock);
switch (family) {
case AF_INET:
{
u_char loop = val;
if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_LOOP,
XORP_SOCKOPT_CAST(&loop), sizeof(loop)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IP_MULTICAST_LOOP %u: %s",
loop,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
break;
}
#ifdef HAVE_IPV6
case AF_INET6:
{
unsigned int loop6 = val;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
XORP_SOCKOPT_CAST(&loop6), sizeof(loop6)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IPV6_MULTICAST_LOOP %u: %s",
loop6, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
break;
}
#endif /* HAVE_IPV6 */
default:
XLOG_FATAL("Error %s setsockopt IP_MULTICAST_LOOP/IPV6_MULTICAST_LOOP "
"on socket %d: invalid family = %d",
(val)? "set": "reset", sock, family);
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_sock_get_family(xsock_t sock)
{
#ifdef HOST_OS_WINDOWS
WSAPROTOCOL_INFO wspinfo;
int err, len;
len = sizeof(wspinfo);
err = getsockopt(sock, SOL_SOCKET, SO_PROTOCOL_INFO,
XORP_SOCKOPT_CAST(&wspinfo), &len);
if (err != 0) {
_comm_set_serrno();
XLOG_ERROR("Error getsockopt(SO_PROTOCOL_INFO) for socket %d: %s",
sock, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return ((int)wspinfo.iAddressFamily);
#else /* ! HOST_OS_WINDOWS */
/* XXX: Should use struct sockaddr_storage. */
#ifndef MAXSOCKADDR
#define MAXSOCKADDR 128 /* max socket address structure size */
#endif
union {
struct sockaddr sa;
char data[MAXSOCKADDR];
} un;
socklen_t len;
len = MAXSOCKADDR;
if (getsockname(sock, &un.sa, &len) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error getsockname() for socket %d: %s",
sock, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (un.sa.sa_family);
#endif /* ! HOST_OS_WINDOWS */
}
int
comm_set_bindtodevice(xsock_t sock, const char * my_ifname)
{
#ifdef SO_BINDTODEVICE
char tmp_ifname[IFNAMSIZ];
/*
* Bind a socket to an interface by name.
*
* Under Linux, use of the undirected broadcast address
* 255.255.255.255 requires that the socket is bound to the
* underlying interface, as it is an implicitly scoped address
* with no meaning on its own. This is not architecturally OK,
* and requires additional support for SO_BINDTODEVICE.
* See socket(7) man page in Linux.
*
* Note: strlcpy() is not present in glibc; strncpy() is used
* instead to avoid introducing a circular dependency on the
* C++ library libxorp.
*/
strncpy(tmp_ifname, my_ifname, IFNAMSIZ-1);
tmp_ifname[IFNAMSIZ-1] = '\0';
if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, tmp_ifname,
sizeof(tmp_ifname)) < 0) {
_comm_set_serrno();
static bool do_once = true;
// Ignore EPERM..just means user isn't running as root, ie for 'scons check'
// most likely..User will have bigger trouble if not running as root for
// a production system anyway.
if (errno != EPERM) {
if (do_once) {
XLOG_WARNING("setsockopt SO_BINDTODEVICE %s: %s This error will only be printed once per program instance.",
tmp_ifname, comm_get_error_str(comm_get_last_error()));
do_once = false;
}
}
return (XORP_ERROR);
}
return (XORP_OK);
#else
#ifndef __FreeBSD__
// FreeBSD doesn't implement this, so no use filling logs with errors that can't
// be helped. Assume calling code deals with the error code as needed.
XLOG_ERROR("setsockopt SO_BINDTODEVICE %s: %s",
my_ifname, "SO_BINDTODEVICE support not present.");
#endif
UNUSED(my_ifname);
UNUSED(sock);
return (XORP_ERROR);
#endif
}
int
comm_set_send_broadcast(xsock_t sock, int val)
{
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
XORP_SOCKOPT_CAST(&val), sizeof(val)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error %s SO_BROADCAST on socket %d: %s",
(val)? "set": "reset", sock,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_set_nodelay(xsock_t sock, int val)
{
if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
XORP_SOCKOPT_CAST(&val), sizeof(val)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error %s TCP_NODELAY on socket %d: %s",
(val)? "set": "reset", sock,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_sock_bind6(xsock_t sock, const struct in6_addr *my_addr,
unsigned int my_ifindex, unsigned short my_port)
{
#ifdef HAVE_IPV6
int family;
struct sockaddr_in6 sin6_addr;
family = comm_sock_get_family(sock);
if (family != AF_INET6) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET6);
return (XORP_ERROR);
}
memset(&sin6_addr, 0, sizeof(sin6_addr));
#ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN
sin6_addr.sin6_len = sizeof(sin6_addr);
#endif
sin6_addr.sin6_family = (u_char)family;
sin6_addr.sin6_port = my_port; /* XXX: in network order */
sin6_addr.sin6_flowinfo = 0; /* XXX: unused (?) */
if (my_addr != NULL)
memcpy(&sin6_addr.sin6_addr, my_addr, sizeof(sin6_addr.sin6_addr));
else
memcpy(&sin6_addr.sin6_addr, &in6addr_any, sizeof(sin6_addr.sin6_addr));
if (IN6_IS_ADDR_LINKLOCAL(&sin6_addr.sin6_addr))
sin6_addr.sin6_scope_id = my_ifindex;
else
sin6_addr.sin6_scope_id = 0;
if (bind(sock, (struct sockaddr *)&sin6_addr, sizeof(sin6_addr)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error binding socket (family = %d, "
"my_addr = %s, my_port = %d): %s",
family,
(my_addr)?
inet_ntop(family, my_addr, addr_str_255, sizeof(addr_str_255))
: "ANY",
ntohs(my_port), comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! HAVE_IPV6 */
comm_sock_no_ipv6("comm_sock_bind6", sock, my_addr, my_ifindex, my_port);
return (XORP_ERROR);
#endif /* ! HAVE_IPV6 */
}
int
comm_sock_listen(xsock_t sock, int backlog)
{
int ret;
ret = listen(sock, backlog);
if (ret < 0) {
_comm_set_serrno();
XLOG_ERROR("Error listening on socket (socket = %d) : %s",
sock, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
xsock_t
comm_sock_open(int domain, int type, int protocol, int is_blocking)
{
xsock_t sock;
/* Create the kernel socket */
sock = socket(domain, type, protocol);
if (sock == XORP_BAD_SOCKET) {
_comm_set_serrno();
XLOG_ERROR("Error opening socket (domain = %d, type = %d, "
"protocol = %d): %s",
domain, type, protocol,
comm_get_error_str(comm_get_last_error()));
return (XORP_BAD_SOCKET);
}
/* Set the receiving and sending socket buffer size in the kernel */
if (comm_sock_set_rcvbuf(sock, SO_RCV_BUF_SIZE_MAX, SO_RCV_BUF_SIZE_MIN)
< SO_RCV_BUF_SIZE_MIN) {
_comm_set_serrno();
comm_sock_close(sock);
return (XORP_BAD_SOCKET);
}
if (comm_sock_set_sndbuf(sock, SO_SND_BUF_SIZE_MAX, SO_SND_BUF_SIZE_MIN)
< SO_SND_BUF_SIZE_MIN) {
_comm_set_serrno();
comm_sock_close(sock);
return (XORP_BAD_SOCKET);
}
/* Enable TCP_NODELAY */
if (type == SOCK_STREAM && (domain == AF_INET || domain == AF_INET6)
&& comm_set_nodelay(sock, 1) != XORP_OK) {
_comm_set_serrno();
comm_sock_close(sock);
return (XORP_BAD_SOCKET);
}
/* Set blocking mode */
if (comm_sock_set_blocking(sock, is_blocking) != XORP_OK) {
_comm_set_serrno();
comm_sock_close(sock);
return (XORP_BAD_SOCKET);
}
return (sock);
}
int
comm_sock_get_type(xsock_t sock)
{
int err, type;
socklen_t len = sizeof(type);
err = getsockopt(sock, SOL_SOCKET, SO_TYPE,
XORP_SOCKOPT_CAST(&type), &len);
if (err != 0) {
_comm_set_serrno();
XLOG_ERROR("Error getsockopt(SO_TYPE) for socket %d: %s",
sock, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return type;
}
int
comm_sock_leave4(xsock_t sock, const struct in_addr *mcast_addr,
const struct in_addr *my_addr)
{
int family;
struct ip_mreq imr; /* the multicast leave address */
family = comm_sock_get_family(sock);
if (family != AF_INET) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET);
return (XORP_ERROR);
}
memset(&imr, 0, sizeof(imr));
imr.imr_multiaddr.s_addr = mcast_addr->s_addr;
if (my_addr != NULL)
imr.imr_interface.s_addr = my_addr->s_addr;
else
imr.imr_interface.s_addr = INADDR_ANY;
if (setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP,
XORP_SOCKOPT_CAST(&imr), sizeof(imr)) < 0) {
char mcast_addr_str[32], my_addr_str[32];
_comm_set_serrno();
strncpy(mcast_addr_str, inet_ntoa(*mcast_addr),
sizeof(mcast_addr_str) - 1);
mcast_addr_str[sizeof(mcast_addr_str) - 1] = '\0';
if (my_addr != NULL)
strncpy(my_addr_str, inet_ntoa(*my_addr),
sizeof(my_addr_str) - 1);
else
strncpy(my_addr_str, "ANY", sizeof(my_addr_str) - 1);
my_addr_str[sizeof(my_addr_str) - 1] = '\0';
XLOG_ERROR("Error leaving mcast group (family = %d, "
"mcast_addr = %s my_addr = %s): %s",
family, mcast_addr_str, my_addr_str,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_set_tos(xsock_t sock, int val)
{
#ifdef IP_TOS
/*
* Most implementations use 'int' to represent the value of
* the IP_TOS option.
*/
int family, ip_tos;
family = comm_sock_get_family(sock);
if (family != AF_INET) {
XLOG_FATAL("Error %s setsockopt IP_TOS on socket %d: "
"invalid family = %d",
(val)? "set": "reset", sock, family);
return (XORP_ERROR);
}
/*
* Note that it is not guaranteed that the TOS will be successfully
* set or indeed propagated where the host platform is running
* its own traffic classifier; the use of comm_set_tos() is
* intended for link-scoped traffic.
*/
ip_tos = val;
if (setsockopt(sock, IPPROTO_IP, IP_TOS,
XORP_SOCKOPT_CAST(&ip_tos), sizeof(ip_tos)) < 0) {
_comm_set_serrno();
XLOG_ERROR("setsockopt IP_TOS 0x%x: %s",
ip_tos, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else
UNUSED(sock);
UNUSED(val);
XLOG_WARNING("IP_TOS Undefined!");
return (XORP_ERROR);
#endif /* ! IP_TOS */
}
int
comm_sock_close(xsock_t sock)
{
int ret;
#ifndef HOST_OS_WINDOWS
ret = close(sock);
#else
(void)WSAEventSelect(sock, NULL, 0);
ret = closesocket(sock);
#endif
if (ret < 0) {
_comm_set_serrno();
XLOG_ERROR("Error closing socket (socket = %d) : %s",
sock, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_set_nosigpipe(xsock_t sock, int val)
{
#ifdef SO_NOSIGPIPE
if (setsockopt(sock, SOL_SOCKET, SO_NOSIGPIPE,
XORP_SOCKOPT_CAST(&val), sizeof(val)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error %s SO_NOSIGPIPE on socket %d: %s",
(val)? "set": "reset", sock,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! SO_NOSIGPIPE */
UNUSED(sock);
UNUSED(val);
XLOG_WARNING("SO_NOSIGPIPE Undefined!");
return (XORP_ERROR);
#endif /* ! SO_NOSIGPIPE */
}
int
comm_sock_bind4(xsock_t sock, const struct in_addr *my_addr,
unsigned short my_port)
{
int family;
struct sockaddr_in sin_addr;
family = comm_sock_get_family(sock);
if (family != AF_INET) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET);
return (XORP_ERROR);
}
memset(&sin_addr, 0, sizeof(sin_addr));
#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
sin_addr.sin_len = sizeof(sin_addr);
#endif
sin_addr.sin_family = (u_char)family;
sin_addr.sin_port = my_port; /* XXX: in network order */
if (my_addr != NULL)
sin_addr.sin_addr.s_addr = my_addr->s_addr; /* XXX: in network order */
else
sin_addr.sin_addr.s_addr = INADDR_ANY;
if (bind(sock, (struct sockaddr *)&sin_addr, sizeof(sin_addr)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error binding socket (family = %d, "
"my_addr = %s, my_port = %d): %s",
family,
(my_addr)? inet_ntoa(*my_addr) : "ANY",
ntohs(my_port),
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_set_nopush(xsock_t sock, int val)
{
#ifdef TCP_NOPUSH /* XXX: Defined in <netinet/tcp.h> across Free/Net/OpenBSD */
if (setsockopt(sock, IPPROTO_TCP, TCP_NOPUSH,
XORP_SOCKOPT_CAST(&val), sizeof(val)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error %s TCP_NOPUSH on socket %d: %s",
(val)? "set": "reset", sock,
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! TCP_NOPUSH */
UNUSED(sock);
UNUSED(val);
XLOG_WARNING("TCP_NOPUSH Undefined!");
return (XORP_ERROR);
#endif /* ! TCP_NOPUSH */
}
int
comm_sock_leave6(xsock_t sock, const struct in6_addr *mcast_addr,
unsigned int my_ifindex)
{
#ifdef HAVE_IPV6
int family;
struct ipv6_mreq imr6; /* the multicast leave address */
family = comm_sock_get_family(sock);
if (family != AF_INET6) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET6);
return (XORP_ERROR);
}
memset(&imr6, 0, sizeof(imr6));
memcpy(&imr6.ipv6mr_multiaddr, mcast_addr, sizeof(*mcast_addr));
imr6.ipv6mr_interface = my_ifindex;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
XORP_SOCKOPT_CAST(&imr6), sizeof(imr6)) < 0) {
_comm_set_serrno();
XLOG_ERROR("Error leaving mcast group (family = %d, "
"mcast_addr = %s my_ifindex = %d): %s",
family,
inet_ntop(family, mcast_addr, addr_str_255, sizeof(addr_str_255)),
my_ifindex, comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! HAVE_IPV6 */
comm_sock_no_ipv6("comm_sock_leave6", sock, mcast_addr, my_ifindex);
return (XORP_ERROR);
#endif /* ! HAVE_IPV6 */
}
char const *
comm_get_last_error_str(void)
{
return comm_get_error_str(comm_get_last_error());
}
int
comm_sock_connect4(xsock_t sock, const struct in_addr *remote_addr,
unsigned short remote_port, int is_blocking,
int *in_progress)
{
int family;
struct sockaddr_in sin_addr;
if (in_progress != NULL)
*in_progress = 0;
family = comm_sock_get_family(sock);
if (family != AF_INET) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET);
return (XORP_ERROR);
}
memset(&sin_addr, 0, sizeof(sin_addr));
#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
sin_addr.sin_len = sizeof(sin_addr);
#endif
sin_addr.sin_family = (u_char)family;
sin_addr.sin_port = remote_port; /* XXX: in network order */
sin_addr.sin_addr.s_addr = remote_addr->s_addr; /* XXX: in network order */
if (connect(sock, (struct sockaddr *)&sin_addr, sizeof(sin_addr)) < 0) {
_comm_set_serrno();
if (! is_blocking) {
#ifdef HOST_OS_WINDOWS
if (comm_get_last_error() == WSAEWOULDBLOCK) {
#else
if (comm_get_last_error() == EINPROGRESS) {
#endif
/*
* XXX: The connection is non-blocking, and the connection
* cannot be completed immediately, therefore set the
* in_progress flag to 1 and return an error.
*/
if (in_progress != NULL)
*in_progress = 1;
return (XORP_ERROR);
}
}
XLOG_ERROR("Error connecting socket (family = %d, "
"remote_addr = %s, remote_port = %d): %s",
family, inet_ntoa(*remote_addr), ntohs(remote_port),
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
}
int
comm_sock_connect6(xsock_t sock, const struct in6_addr *remote_addr,
unsigned short remote_port, int is_blocking,
int *in_progress)
{
#ifdef HAVE_IPV6
int family;
struct sockaddr_in6 sin6_addr;
if (in_progress != NULL)
*in_progress = 0;
family = comm_sock_get_family(sock);
if (family != AF_INET6) {
XLOG_ERROR("Invalid family of socket %d: family = %d (expected %d)",
sock, family, AF_INET6);
return (XORP_ERROR);
}
memset(&sin6_addr, 0, sizeof(sin6_addr));
#ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN
sin6_addr.sin6_len = sizeof(sin6_addr);
#endif
sin6_addr.sin6_family = (u_char)family;
sin6_addr.sin6_port = remote_port; /* XXX: in network order */
sin6_addr.sin6_flowinfo = 0; /* XXX: unused (?) */
memcpy(&sin6_addr.sin6_addr, remote_addr, sizeof(sin6_addr.sin6_addr));
sin6_addr.sin6_scope_id = 0; /* XXX: unused (?) */
if (connect(sock, (struct sockaddr *)&sin6_addr, sizeof(sin6_addr)) < 0) {
_comm_set_serrno();
if (! is_blocking) {
#ifdef HOST_OS_WINDOWS
if (comm_get_last_error() == WSAEWOULDBLOCK) {
#else
if (comm_get_last_error() == EINPROGRESS) {
#endif
/*
* XXX: The connection is non-blocking, and the connection
* cannot be completed immediately, therefore set the
* in_progress flag to 1 and return an error.
*/
if (in_progress != NULL)
*in_progress = 1;
return (XORP_ERROR);
}
}
XLOG_ERROR("Error connecting socket (family = %d, "
"remote_addr = %s, remote_port = %d): %s",
family,
(remote_addr)?
inet_ntop(family, remote_addr, addr_str_255, sizeof(addr_str_255))
: "ANY",
ntohs(remote_port),
comm_get_error_str(comm_get_last_error()));
return (XORP_ERROR);
}
return (XORP_OK);
#else /* ! HAVE_IPV6 */
if (in_progress != NULL)
*in_progress = 0;
comm_sock_no_ipv6("comm_sock_connect6", sock, remote_addr, remote_port,
is_blocking);
return (XORP_ERROR);
#endif /* ! HAVE_IPV6 */
}
int
comm_sock_connect(xsock_t sock, const struct sockaddr *sin, int is_blocking,
int *in_progress)
{
switch (sin->sa_family) {
case AF_INET:
{
const struct sockaddr_in *sin4 = (const struct sockaddr_in *)((const void *)sin);
return comm_sock_connect4(sock, &sin4->sin_addr, sin4->sin_port,
is_blocking, in_progress);
}
break;
#ifdef HAVE_IPV6
case AF_INET6:
{
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)((const void *)sin);
return comm_sock_connect6(sock, &sin6->sin6_addr, sin6->sin6_port,
is_blocking, in_progress);
}
break;
#endif /* HAVE_IPV6 */
default:
XLOG_FATAL("Error comm_sock_connect invalid family = %d",
sin->sa_family);
return (XORP_ERROR);
}
XLOG_UNREACHABLE();
return XORP_ERROR;
}
xsock_t
comm_sock_accept(xsock_t sock)
{
xsock_t sock_accept;
struct sockaddr addr;
socklen_t socklen = sizeof(addr);
sock_accept = accept(sock, &addr, &socklen);
if (sock_accept == XORP_BAD_SOCKET) {
_comm_set_serrno();
XLOG_ERROR("Error accepting socket %d: %s",
sock, comm_get_error_str(comm_get_last_error()));
return (XORP_BAD_SOCKET);
}
#ifdef HOST_OS_WINDOWS
/*
* Squelch Winsock event notifications on the new socket which may
* have been inherited from the parent listening socket.
*/
(void)WSAEventSelect(sock_accept, NULL, 0);
#endif
/* Enable TCP_NODELAY */
if ((addr.sa_family == AF_INET || addr.sa_family == AF_INET6)
&& comm_set_nodelay(sock_accept, 1) != XORP_OK) {
comm_sock_close(sock_accept);
return (XORP_BAD_SOCKET);
}
return (sock_accept);
}