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#include "sockhelper.h"
#include "memlog.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
static inline int connect_shared(const int client_sock, void* addr, const int addrlen, int connect_ms, int rw_ms)
{
struct timeval tv;
// Connect to server
tv.tv_sec = connect_ms / 1000;
tv.tv_usec = connect_ms * 1000;
setsockopt( client_sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv) );
setsockopt( client_sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv) );
if ( connect( client_sock, (struct sockaddr *)addr, addrlen ) == -1 ) {
close( client_sock );
return -1;
}
// Apply read/write timeout
tv.tv_sec = rw_ms / 1000;
tv.tv_usec = rw_ms * 1000;
setsockopt( client_sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv) );
setsockopt( client_sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv) );
return client_sock;
}
int sock_connect4(struct sockaddr_in *addr, const int connect_ms, const int rw_ms)
{
int client_sock = socket( PF_INET, SOCK_STREAM, IPPROTO_TCP );
if ( client_sock == -1 ) return -1;
return connect_shared( client_sock, addr, sizeof(struct sockaddr_in), connect_ms, rw_ms );
}
int sock_connect6(struct sockaddr_in6 *addr, const int connect_ms, const int rw_ms)
{
#ifdef WITH_IPV6
int client_sock = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
if (client_sock == -1) return -1;
return connect_shared(client_sock, addr, sizeof(struct sockaddr_in6), connect_ms, rw_ms);
#else
printf( "[DEBUG] Not compiled with IPv6 support.\n" );
return -1;
#endif
}
int sock_connect(const dnbd3_host_t * const addr, const int connect_ms, const int rw_ms)
{
if ( addr->type == AF_INET ) {
// Set host (IPv4)
struct sockaddr_in addr4;
memset( &addr4, 0, sizeof(addr4) );
addr4.sin_family = AF_INET;
memcpy( &addr4.sin_addr, addr->addr, 4 );
addr4.sin_port = addr->port;
return sock_connect4( &addr4, connect_ms, rw_ms );
}
#ifdef WITH_IPV6
else if (addr->type == AF_INET6)
{
// Set host (IPv6)
struct sockaddr_in6 addr6;
memset(&addr6, 0, sizeof(addr6));
addr6.sin6_family = AF_INET6;
memcpy(&addr6.sin6_addr, addr->addr, 16);
addr6.sin6_port = addr->port;
return sock_connect6(&addr6, connect_ms, rw_ms);
}
#endif
printf( "[DEBUG] Unsupported address type: %d\n", (int)addr->type );
return -1;
}
void sock_set_timeout(const int sockfd, const int milliseconds)
{
struct timeval tv;
tv.tv_sec = milliseconds / 1000;
tv.tv_usec = (milliseconds * 1000) % 1000000;
setsockopt( sockfd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv) );
setsockopt( sockfd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv) );
}
int sock_listen_any(int protocol_family, uint16_t port, char* bind_addr)
{
struct sockaddr_storage addr;
struct in_addr local;
if (bind_addr != NULL) {
if (!inet_aton(bind_addr, &local)) return -1;
}
memset( &addr, 0, sizeof(addr) );
if ( protocol_family == PF_INET ) {
struct sockaddr_in *v4 = (struct sockaddr_in *)&addr;
if (bind_addr == NULL) {
v4->sin_addr.s_addr = INADDR_ANY;
} else {
v4->sin_addr = local;
}
v4->sin_port = htons( port );
v4->sin_family = AF_INET;
}
#ifdef WITH_IPV6
else if (protocol_family == PF_INET6)
{
struct sockaddr_in6 *v6 = (struct sockaddr_in6 *)&addr;
v6->sin6_addr = in6addr_any;
v6->sin6_port = htons(port);
v6->sin6_family = AF_INET6;
}
#endif
else {
printf( "[DEBUG] sock_listen: Unsupported protocol: %d\n", protocol_family );
return -1;
}
return sock_listen( &addr, sizeof(addr) );
}
int sock_listen(struct sockaddr_storage *addr, int addrlen)
{
int pf; // On Linux AF_* == PF_*, but this is not guaranteed on all platforms, so let's be safe here:
if ( addr->ss_family == AF_INET ) pf = PF_INET;
#ifdef WITH_IPV6
else if (addr->ss_family == AF_INET6)
pf = PF_INET6;
#endif
else {
printf( "[DEBUG] sock_listen: unsupported address type: %d\n", (int)addr->ss_family );
return -1;
}
int sock;
// Create socket
sock = socket( pf, SOCK_STREAM, IPPROTO_TCP );
if ( sock < 0 ) {
memlogf( "[ERROR] sock_listen: Socket setup failure" ); // TODO: print port number to help troubleshooting
return -1;
}
const int on = 1;
setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on) );
if ( pf == PF_INET6 ) setsockopt( sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on) );
// Bind to socket
if ( bind( sock, (struct sockaddr *)addr, addrlen ) < 0 ) {
int e = errno;
close( sock );
memlogf( "[ERROR] Bind failure (%d)", e ); // TODO: print port number to help troubleshooting
return -1;
}
// Listen on socket
if ( listen( sock, 20 ) == -1 ) {
close( sock );
memlogf( "[ERROR] Listen failure" ); // TODO ...
return -1;
}
return sock;
}
int accept_any(const int * const sockets, const int socket_count, struct sockaddr_storage *addr, socklen_t *length_ptr)
{
fd_set set;
FD_ZERO( &set );
int max = 0;
for (int i = 0; i < socket_count; ++i) {
FD_SET( sockets[i], &set );
if ( sockets[i] > max ) max = sockets[i];
}
if ( select( max + 1, &set, NULL, NULL, NULL ) <= 0 ) return -1;
for (int i = 0; i < socket_count; ++i) {
if ( FD_ISSET(sockets[i], &set)) return accept( sockets[i], (struct sockaddr *)addr, length_ptr );
}
return -1;
}
void sock_set_nonblock(int sock)
{
int flags = fcntl( sock, F_GETFL, 0 );
if ( flags == -1 ) flags = 0;
fcntl( sock, F_SETFL, flags | O_NONBLOCK );
}
void sock_set_block(int sock)
{
int flags = fcntl( sock, F_GETFL, 0 );
if ( flags == -1 ) flags = 0;
fcntl( sock, F_SETFL, flags & ~(int)O_NONBLOCK );
}
int sock_add_array(const int sock, int *array, int *array_fill, const int array_length)
{
if ( sock == -1 ) return TRUE;
for (int i = 0; i < *array_fill; ++i) {
if ( array[i] == -1 ) {
array[i] = sock;
return TRUE;
}
}
if ( *array_fill >= array_length ) return FALSE;
array[*array_fill] = sock;
(*array_fill) += 1;
return TRUE;
}
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