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