102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <netdb.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
#include "usock.h"
|
|
|
|
int usock(int type, const char *host, const char *service) {
|
|
int sock = -1;
|
|
|
|
if (service && !(type & USOCK_UNIX)) {
|
|
struct addrinfo *result, *rp;
|
|
|
|
struct addrinfo hints = {
|
|
.ai_family = (type & USOCK_IPV6ONLY) ? AF_INET6 :
|
|
(type & USOCK_IPV4ONLY) ? AF_INET : AF_UNSPEC,
|
|
.ai_socktype = ((type & 0xff) == USOCK_TCP)
|
|
? SOCK_STREAM : SOCK_DGRAM,
|
|
.ai_flags = AI_ADDRCONFIG
|
|
| ((type & USOCK_SERVER) ? AI_PASSIVE : 0)
|
|
| ((type & USOCK_NUMERIC) ? AI_NUMERICHOST : 0),
|
|
};
|
|
|
|
if (getaddrinfo(host, service, &hints, &result)) {
|
|
return -1;
|
|
}
|
|
|
|
for (rp = result; rp != NULL; rp = rp->ai_next) {
|
|
if ((sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol))
|
|
== -1) {
|
|
continue;
|
|
}
|
|
|
|
if (!(type & USOCK_NOCLOEXEC)) {
|
|
fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
|
|
}
|
|
|
|
if (type & USOCK_NONBLOCK) {
|
|
fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
|
|
}
|
|
|
|
if (type & USOCK_SERVER) {
|
|
const int one = 1;
|
|
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
|
|
|
|
if (!bind(sock, rp->ai_addr, rp->ai_addrlen)
|
|
&& ((type & 0xff) != USOCK_TCP || !listen(sock, SOMAXCONN))) {
|
|
break;
|
|
}
|
|
} else {
|
|
if (!connect(sock, rp->ai_addr, rp->ai_addrlen)
|
|
|| errno == EINPROGRESS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
close(sock);
|
|
sock = -1;
|
|
}
|
|
freeaddrinfo(result);
|
|
} else {
|
|
struct sockaddr_un sun = {.sun_family = AF_UNIX};
|
|
if (strlen(host) >= sizeof(sun.sun_path)) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
strcpy(sun.sun_path, host);
|
|
|
|
if ((sock = socket(AF_UNIX, ((type & 0xff) == USOCK_TCP)
|
|
? SOCK_STREAM : SOCK_DGRAM, 0)) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
if (!(type & USOCK_NOCLOEXEC)) {
|
|
fcntl(sock, F_SETFD, fcntl(sock, F_GETFD) | FD_CLOEXEC);
|
|
}
|
|
|
|
if (type & USOCK_NONBLOCK) {
|
|
fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_NONBLOCK);
|
|
}
|
|
|
|
if (type & USOCK_SERVER) {
|
|
if (bind(sock, (struct sockaddr*)&sun, sizeof(sun)) ||
|
|
((type & 0xff) == USOCK_TCP && listen(sock, SOMAXCONN))) {
|
|
close(sock);
|
|
return -1;
|
|
}
|
|
} else {
|
|
if (connect(sock, (struct sockaddr*)&sun, sizeof(sun))
|
|
&& errno != EINPROGRESS) {
|
|
close(sock);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
return sock;
|
|
}
|