fadd

deployments/openvpn/third_party/microsocks/server.c

@@ -0,0 +1,64 @@
+#include "server.h"
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int resolve(const char *host, unsigned short port, struct addrinfo** addr) {
+	struct addrinfo hints = {
+		.ai_family = AF_UNSPEC,
+		.ai_socktype = SOCK_STREAM,
+		.ai_flags = AI_PASSIVE,
+	};
+	char port_buf[8];
+	snprintf(port_buf, sizeof port_buf, "%u", port);
+	return getaddrinfo(host, port_buf, &hints, addr);
+}
+
+int resolve_sa(const char *host, unsigned short port, union sockaddr_union *res) {
+	struct addrinfo *ainfo = 0;
+	int ret;
+	SOCKADDR_UNION_AF(res) = AF_UNSPEC;
+	if((ret = resolve(host, port, &ainfo))) return ret;
+	memcpy(res, ainfo->ai_addr, ainfo->ai_addrlen);
+	freeaddrinfo(ainfo);
+	return 0;
+}
+
+int bindtoip(int fd, union sockaddr_union *bindaddr) {
+	socklen_t sz = SOCKADDR_UNION_LENGTH(bindaddr);
+	if(sz)
+		return bind(fd, (struct sockaddr*) bindaddr, sz);
+	return 0;
+}
+
+int server_waitclient(struct server *server, struct client* client) {
+	socklen_t clen = sizeof client->addr;
+	return ((client->fd = accept(server->fd, (void*)&client->addr, &clen)) == -1)*-1;
+}
+
+int server_setup(struct server *server, const char* listenip, unsigned short port) {
+	struct addrinfo *ainfo = 0;
+	if(resolve(listenip, port, &ainfo)) return -1;
+	struct addrinfo* p;
+	int listenfd = -1;
+	for(p = ainfo; p; p = p->ai_next) {
+		if((listenfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) < 0)
+			continue;
+		int yes = 1;
+		setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
+		if(bind(listenfd, p->ai_addr, p->ai_addrlen) < 0) {
+			close(listenfd);
+			listenfd = -1;
+			continue;
+		}
+		break;
+	}
+	freeaddrinfo(ainfo);
+	if(listenfd < 0) return -2;
+	if(listen(listenfd, SOMAXCONN) < 0) {
+		close(listenfd);
+		return -3;
+	}
+	server->fd = listenfd;
+	return 0;
+}