/**
*Creates a nonblocking IPv6 socket
*@param sin sockaddr_in6 struct. Used for bind(2).
*@return the FD of the socket or -1 on error.
*/
int
os_getsocket6(const char *if_name, uint16_t port, int bufspace, union olsr_sockaddr *bindto)
{
struct sockaddr_in6 sin6;
int on;
int sock = socket(AF_INET6, SOCK_DGRAM, 0);
if (sock < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot open socket for OLSR PDUs (%s)\n", strerror(errno));
olsr_exit(EXIT_FAILURE);
}
#ifdef IPV6_V6ONLY
on = 1;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) < 0) {
OLSR_WARN(LOG_NETWORKING, "Cannot set socket for OLSR PDUs to ipv6 only (%s)\n", strerror(errno));
}
#endif
//#ifdef SO_BROADCAST
/*
if (setsockopt(sock, SOL_SOCKET, SO_MULTICAST, &on, sizeof(on)) < 0)
{
perror("setsockopt");
syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m");
close(sock);
return (-1);
}
*/
//#endif
#ifdef SO_RCVBUF
if(bufspace > 0) {
for (on = bufspace;; on -= 1024) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &on, sizeof(on)) == 0) {
OLSR_DEBUG(LOG_NETWORKING, "Set socket buffer space to %d\n", on);
break;
}
if (on <= 8 * 1024) {
OLSR_WARN(LOG_NETWORKING, "Could not set a socket buffer space for OLSR PDUs (%s)\n", strerror(errno));
break;
}
}
}
#endif
on = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot reuse address for socket for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
/*
* we are abusing "on" here. The value is 1 which is our intended
* hop limit value.
*/
if (setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot set multicast hops to 1 for socket for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
/*
* WHEN USING KERNEL 2.6 THIS MUST HAPPEN PRIOR TO THE PORT BINDING!!!!
*/
/* Bind to device */
if (bind_socket_to_device(sock, if_name) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot bind socket for OLSR PDUs to interface %s: %s (%d)\n", if_name, strerror(errno), errno);
close(sock);
olsr_exit(EXIT_FAILURE);
}
if (bindto == NULL) {
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_port = htons(port);
bindto = (union olsr_sockaddr *)&sin6;
}
if (bind(sock, &bindto->std, sizeof(*bindto)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot bind socket for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
os_socket_set_nonblocking(sock);
return sock;
}
/**
*Creates a nonblocking IPv6 socket
*@param sin sockaddr_in6 struct. Used for bind(2).
*@return the FD of the socket or -1 on error.
*/
int
getsocket6(int bufspace, struct interface *ifp)
{
struct sockaddr_in6 sin;
int on;
int sock = socket(AF_INET6, SOCK_DGRAM, 0);
if (sock < 0) {
perror("socket");
syslog(LOG_ERR, "socket: %m");
return (-1);
}
#ifdef IPV6_V6ONLY
on = 1;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) < 0) {
perror("setsockopt(IPV6_V6ONLY)");
syslog(LOG_ERR, "setsockopt(IPV6_V6ONLY): %m");
}
#endif
//#ifdef SO_BROADCAST
/*
if (setsockopt(sock, SOL_SOCKET, SO_MULTICAST, &on, sizeof (on)) < 0)
{
perror("setsockopt");
syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m");
close(sock);
return (-1);
}
*/
//#endif
#ifdef SO_RCVBUF
if(bufspace > 0) {
for (on = bufspace;; on -= 1024) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &on, sizeof(on)) == 0)
break;
if (on <= 8 * 1024) {
perror("setsockopt");
syslog(LOG_ERR, "setsockopt SO_RCVBUF: %m");
break;
}
}
}
#endif
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
perror("SO_REUSEADDR failed");
close(sock);
return (-1);
}
/*
* WHEN USING KERNEL 2.6 THIS MUST HAPPEN PRIOR TO THE PORT BINDING!!!!
*/
/* Bind to device */
if (bind_socket_to_device(sock, ifp->int_name) < 0) {
fprintf(stderr, "Could not bind socket to device... exiting!\n\n");
syslog(LOG_ERR, "Could not bind socket to device... exiting!\n\n");
close(sock);
return -1;
}
memset(&sin, 0, sizeof(sin));
sin.sin6_family = AF_INET6;
sin.sin6_port = htons(olsr_cnf->olsrport);
sin.sin6_scope_id = ifp->if_index;
if(bufspace <= 0) {
memcpy(&sin.sin6_addr, &ifp->int6_addr.sin6_addr, sizeof(struct in6_addr));
}
if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
struct ipaddr_str buf;
OLSR_PRINTF(1, "Error, cannot bind address %s to %s-socket: %s (%d)\n",
inet_ntop(sin.sin6_family, &sin.sin6_addr, buf.buf, sizeof(buf)),
bufspace <= 0 ? "transmit" : "receive",
strerror(errno), errno);
syslog(LOG_ERR, "bind: %m");
close(sock);
return (-1);
}
on = fcntl(sock, F_GETFL);
if (on == -1) {
syslog(LOG_ERR, "fcntl (F_GETFL): %m\n");
} else {
if (fcntl(sock, F_SETFL, on | O_NONBLOCK) == -1) {
syslog(LOG_ERR, "fcntl O_NONBLOCK: %m\n");
}
}
return sock;
}
/**
*Creates a nonblocking broadcast socket.
*@param sa sockaddr struct. Used for bind(2).
*@return the FD of the socket or -1 on error.
*/
int
os_getsocket4(const char *if_name, uint16_t port, int bufspace, union olsr_sockaddr *bindto)
{
struct sockaddr_in sin4;
int on;
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot open socket for OLSR PDUs (%s)\n", strerror(errno));
olsr_exit(EXIT_FAILURE);
}
on = 1;
#ifdef SO_BROADCAST
if (bindto) {
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot set socket for OLSR PDUs to broadcast mode (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
}
#endif
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot reuse address for OLSR PDUs (%s)\n", strerror(errno));
close(sock);
olsr_exit(EXIT_FAILURE);
}
#ifdef SO_RCVBUF
if(bufspace > 0) {
for (on = bufspace;; on -= 1024) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &on, sizeof(on)) == 0) {
OLSR_DEBUG(LOG_NETWORKING, "Set socket buffer space to %d\n", on);
break;
}
if (on <= 8 * 1024) {
OLSR_WARN(LOG_NETWORKING, "Could not set a socket buffer space for OLSR PDUs (%s)\n", strerror(errno));
break;
}
}
}
#endif
/*
* WHEN USING KERNEL 2.6 THIS MUST HAPPEN PRIOR TO THE PORT BINDING!!!!
*/
/* Bind to device */
if (bind_socket_to_device(sock, if_name) < 0) {
OLSR_ERROR(LOG_NETWORKING, "Cannot bind socket for OLSR PDUs to interface %s: %s (%d)\n", if_name, strerror(errno), errno);
close(sock);
olsr_exit(EXIT_FAILURE);
}
if (bindto == NULL) {
memset(&sin4, 0, sizeof(sin4));
sin4.sin_family = AF_INET;
sin4.sin_port = htons(port);
sin4.sin_addr.s_addr = 0;
bindto = (union olsr_sockaddr *)&sin4;
}
if (bind(sock, &bindto->std, sizeof(*bindto)) < 0) {
#if !defined(REMOVE_LOG_ERROR)
struct ipaddr_str buf;
#endif
OLSR_ERROR(LOG_NETWORKING, "Could not bind socket for OLSR PDUs to %s/%d: %s (%d)\n",
inet_ntop(AF_INET, &sin4.sin_addr, buf.buf, sizeof(buf)), port, strerror(errno), errno);
close(sock);
olsr_exit(EXIT_FAILURE);
}
os_socket_set_nonblocking(sock);
return sock;
}
/**
*Creates a nonblocking broadcast socket.
*@param sa sockaddr struct. Used for bind(2).
*@return the FD of the socket or -1 on error.
*/
int
getsocket(int bufspace, struct interface *ifp)
{
struct sockaddr_in sin;
int on;
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
perror("socket");
syslog(LOG_ERR, "socket: %m");
return -1;
}
on = 1;
#ifdef SO_BROADCAST
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
perror("setsockopt");
syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m");
close(sock);
return -1;
}
#endif
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
perror("SO_REUSEADDR failed");
close(sock);
return -1;
}
#ifdef SO_RCVBUF
if(bufspace > 0) {
for (on = bufspace;; on -= 1024) {
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &on, sizeof(on)) == 0)
break;
if (on <= 8 * 1024) {
perror("setsockopt");
syslog(LOG_ERR, "setsockopt SO_RCVBUF: %m");
break;
}
}
}
#endif
/*
* WHEN USING KERNEL 2.6 THIS MUST HAPPEN PRIOR TO THE PORT BINDING!!!!
*/
/* Bind to device */
if (bind_socket_to_device(sock, ifp->int_name) < 0) {
fprintf(stderr, "Could not bind socket to device... exiting!\n\n");
syslog(LOG_ERR, "Could not bind socket to device... exiting!\n\n");
close(sock);
return -1;
}
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_port = htons(olsr_cnf->olsrport);
if(bufspace <= 0) {
sin.sin_addr.s_addr = ifp->int_addr.sin_addr.s_addr;
}
if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
perror("bind");
syslog(LOG_ERR, "bind: %m");
close(sock);
return -1;
}
on = fcntl(sock, F_GETFL);
if (on == -1) {
syslog(LOG_ERR, "fcntl (F_GETFL): %m\n");
} else {
if (fcntl(sock, F_SETFL, on | O_NONBLOCK) == -1) {
syslog(LOG_ERR, "fcntl O_NONBLOCK: %m\n");
}
}
return sock;
}
