Octstr *udp_create_address(Octstr *host_or_ip, int port)
{
struct sockaddr_in sa;
struct hostent h;
char *buff = NULL;
Octstr *ret;
sa = empty_sockaddr_in;
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if (strcmp(octstr_get_cstr(host_or_ip), "*") == 0) {
sa.sin_addr.s_addr = INADDR_ANY;
} else {
if (gw_gethostbyname(&h, octstr_get_cstr(host_or_ip), &buff) == -1) {
error(0, "Couldn't find the IP number of `%s'",
octstr_get_cstr(host_or_ip));
gw_free(buff);
return NULL;
}
sa.sin_addr = *(struct in_addr *) h.h_addr;
}
ret = octstr_create_from_data((char *) &sa, sizeof(sa));
gw_free(buff);
return ret;
}
int make_server_socket(int port, const char *interface_name )
{
struct sockaddr_in addr;
int s;
int reuse;
struct hostent hostinfo;
char *buff = NULL;
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1) {
error(errno, "socket failed");
goto error;
}
addr = empty_sockaddr_in;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
if (interface_name == NULL || strcmp(interface_name, "*") == 0)
addr.sin_addr.s_addr = htonl(INADDR_ANY);
else {
if (gw_gethostbyname(&hostinfo, interface_name, &buff) == -1) {
error(errno, "gethostbyname failed");
goto error;
}
addr.sin_addr = *(struct in_addr *) hostinfo.h_addr;
}
reuse = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &reuse,
sizeof(reuse)) == -1) {
error(errno, "setsockopt failed for server address");
goto error;
}
if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) == -1) {
error(errno, "bind failed");
goto error;
}
if (listen(s, 10) == -1) {
error(errno, "listen failed");
goto error;
}
gw_free(buff);
return s;
error:
if (s >= 0)
(void) close(s);
gw_free(buff);
return -1;
}
static void setup_official_name(void)
{
struct utsname u;
struct hostent h;
char *buff = NULL;
gw_assert(official_name == NULL);
if (uname(&u) == -1)
panic(0, "uname failed - can't happen, unless " GW_NAME " is buggy.");
if (gw_gethostbyname(&h, u.nodename, &buff) == -1) {
error(0, "Can't find out official hostname for this host, "
"using `%s' instead.", u.nodename);
official_name = octstr_create(u.nodename);
official_ip = octstr_create("127.0.0.1");
} else {
official_name = octstr_create(h.h_name);
official_ip = gw_netaddr_to_octstr(AF_INET, h.h_addr);
}
gw_free(buff);
}
int udp_bind(int port, const char *interface_name)
{
int s;
struct sockaddr_in sa;
struct hostent hostinfo;
char *buff = NULL;
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s == -1) {
error(errno, "Couldn't create a UDP socket");
return -1;
}
sa = empty_sockaddr_in;
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if (strcmp(interface_name, "*") == 0)
sa.sin_addr.s_addr = htonl(INADDR_ANY);
else {
if (gw_gethostbyname(&hostinfo, interface_name, &buff) == -1) {
error(errno, "gethostbyname failed");
gw_free(buff);
return -1;
}
sa.sin_addr = *(struct in_addr *) hostinfo.h_addr;
}
if (bind(s, (struct sockaddr *) &sa, (int) sizeof(sa)) == -1) {
error(errno, "Couldn't bind a UDP socket to port %d", port);
(void) close(s);
return -1;
}
gw_free(buff);
return s;
}
int tcpip_connect_nb_to_server_with_port(char *hostname, int port, int our_port, const char *interface_name, int *done)
{
struct sockaddr_in addr;
struct sockaddr_in o_addr;
struct hostent hostinfo;
struct hostent o_hostinfo;
int s, flags, rc = -1, i;
char *buff, *buff1;
*done = 1;
buff = buff1 = NULL;
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1) {
error(errno, "Couldn't create new socket.");
goto error;
}
if (gw_gethostbyname(&hostinfo, hostname, &buff) == -1) {
error(errno, "gethostbyname failed");
goto error;
}
if (our_port > 0 || (interface_name != NULL && strcmp(interface_name, "*") != 0)) {
int reuse;
o_addr = empty_sockaddr_in;
o_addr.sin_family = AF_INET;
o_addr.sin_port = htons(our_port);
if (interface_name == NULL || strcmp(interface_name, "*") == 0)
o_addr.sin_addr.s_addr = htonl(INADDR_ANY);
else {
if (gw_gethostbyname(&o_hostinfo, interface_name, &buff1) == -1) {
error(errno, "gethostbyname failed");
goto error;
}
o_addr.sin_addr = *(struct in_addr *) o_hostinfo.h_addr;
}
reuse = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &reuse, sizeof(reuse)) == -1) {
error(errno, "setsockopt failed before bind");
goto error;
}
if (bind(s, (struct sockaddr *) &o_addr, sizeof(o_addr)) == -1) {
error(errno, "bind to local port %d failed", our_port);
goto error;
}
}
flags = fcntl(s, F_GETFL, 0);
fcntl(s, F_SETFL, flags | O_NONBLOCK);
i = 0;
do {
Octstr *ip2;
addr = empty_sockaddr_in;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr = *(struct in_addr *) hostinfo.h_addr_list[i];
ip2 = gw_netaddr_to_octstr(AF_INET, &addr.sin_addr);
debug("gwlib.socket", 0, "Connecting nonblocking to <%s>", octstr_get_cstr(ip2));
if ((rc = connect(s, (struct sockaddr *) &addr, sizeof(addr))) < 0) {
if (errno != EINPROGRESS) {
error(errno, "nonblocking connect to <%s> failed", octstr_get_cstr(ip2));
}
}
octstr_destroy(ip2);
} while (rc == -1 && errno != EINPROGRESS && hostinfo.h_addr_list[++i] != NULL);
if (rc == -1 && errno != EINPROGRESS)
goto error;
/* May be connected immediatly
* (if we connecting to localhost for example)
*/
if (rc == 0) {
*done = 0;
}
gw_free(buff);
gw_free(buff1);
return s;
error:
error(0, "error connecting to server `%s' at port `%d'", hostname, port);
if (s >= 0)
close(s);
gw_free(buff);
gw_free(buff1);
return -1;
}
int tcpip_connect_to_server_with_port(char *hostname, int port, int our_port, const char *source_addr)
{
struct sockaddr_in addr;
struct sockaddr_in o_addr;
struct hostent hostinfo;
struct hostent o_hostinfo;
int s, rc = -1, i;
char *buff, *buff1;
buff = buff1 = NULL;
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1) {
error(errno, "Couldn't create new socket.");
goto error;
}
if (gw_gethostbyname(&hostinfo, hostname, &buff) == -1) {
error(errno, "gethostbyname failed");
goto error;
}
if (our_port > 0 || (source_addr != NULL && strcmp(source_addr, "*") != 0)) {
int reuse;
o_addr = empty_sockaddr_in;
o_addr.sin_family = AF_INET;
o_addr.sin_port = htons(our_port);
if (source_addr == NULL || strcmp(source_addr, "*") == 0)
o_addr.sin_addr.s_addr = htonl(INADDR_ANY);
else {
if (gw_gethostbyname(&o_hostinfo, source_addr, &buff1) == -1) {
error(errno, "gethostbyname failed");
goto error;
}
o_addr.sin_addr = *(struct in_addr *) o_hostinfo.h_addr;
}
reuse = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *) &reuse, sizeof(reuse)) == -1) {
error(errno, "setsockopt failed before bind");
goto error;
}
if (bind(s, (struct sockaddr *) &o_addr, sizeof(o_addr)) == -1) {
error(errno, "bind to local port %d failed", our_port);
goto error;
}
}
i = 0;
do {
Octstr *ip2;
addr = empty_sockaddr_in;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr = *(struct in_addr *) hostinfo.h_addr_list[i];
ip2 = gw_netaddr_to_octstr(AF_INET, &addr.sin_addr);
debug("gwlib.socket", 0, "Connecting to <%s>", octstr_get_cstr(ip2));
rc = connect(s, (struct sockaddr *) &addr, sizeof(addr));
if (rc == -1) {
error(errno, "connect to <%s> failed", octstr_get_cstr(ip2));
}
octstr_destroy(ip2);
} while (rc == -1 && hostinfo.h_addr_list[++i] != NULL);
if (rc == -1)
goto error;
gw_free(buff);
gw_free(buff1);
return s;
error:
error(0, "error connecting to server `%s' at port `%d'", hostname, port);
if (s >= 0)
close(s);
gw_free(buff);
gw_free(buff1);
return -1;
}
