From cc3f33db7a8d3c4ad373e646b199808e01bc5d9b Mon Sep 17 00:00:00 2001
From: sss <sss@dark-alexandr.net>
Date: Tue, 17 Jan 2023 00:38:19 +0300
Subject: added webrdp public code

---
 src/core/socket_helpers.c | 143 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 src/core/socket_helpers.c

(limited to 'src/core/socket_helpers.c')

diff --git a/src/core/socket_helpers.c b/src/core/socket_helpers.c
new file mode 100644
index 0000000..2d2cdbb
--- /dev/null
+++ b/src/core/socket_helpers.c
@@ -0,0 +1,143 @@
+/* BSD-2-Clause license
+ * 
+ * Copyright (c) 2018-2023 NST <www.newinfosec.ru>, sss <sss at dark-alexandr dot net>. 
+ * 
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <netinet/tcp.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+
+#include <stdbool.h>
+#include "webrdp_core_api.h"
+#include "log.h"
+
+void
+socket_make_non_block(int sock)
+{
+	int flags, r;
+	while ((flags = fcntl(sock, F_GETFL, 0)) == -1 && errno == EINTR)
+	{
+	}
+	if (flags == -1)
+	{
+		perror("fcntl");
+		exit(EXIT_FAILURE);
+	}
+	while ((r = fcntl(sock, F_SETFL, flags | O_NONBLOCK)) == -1
+	       && errno == EINTR)
+	{
+	}
+	if (r == -1)
+	{
+		perror("fcntl");
+		exit(EXIT_FAILURE);
+	}
+}
+
+int
+create_listen_socket_tcp(uint32_t port)
+{
+	/* TODO: ipv6 */
+	struct addrinfo hints, *res, *rp;
+	int sfd = -1;
+	int r;
+	memset(&hints, 0, sizeof(struct addrinfo));
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
+	{
+		char sport[10];
+		snprintf(sport, 9, "%d", port);
+		r = getaddrinfo(0, sport, &hints, &res);
+	}
+	if (r != 0)
+	{
+		uint8_t buf[64];
+		snprintf((char *)buf, 63, "getaddrinfo: %s", gai_strerror(r));
+		log_msg(
+		    buf, strlen((const char *)buf), wrdp_log_level_error, 0);
+		exit(EXIT_FAILURE);
+	}
+	for (rp = res; rp; rp = rp->ai_next)
+	{
+		int val = 1;
+		sfd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
+		if (sfd == -1)
+		{
+			continue;
+		}
+		if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &val,
+			(socklen_t)sizeof(val))
+		    == -1)
+		{
+			continue;
+		}
+		if (bind(sfd, rp->ai_addr, rp->ai_addrlen) == 0)
+		{
+			break;
+		}
+		close(sfd);
+	}
+	freeaddrinfo(res);
+	if (listen(sfd, 16) == -1)
+	{
+		perror("listen");
+		close(sfd);
+		exit(EXIT_FAILURE);
+	}
+	return sfd;
+}
+
+int
+create_listen_socket_unix(const char *path)
+{
+	struct sockaddr_un saddr;
+	int sfd = socket(AF_UNIX, SOCK_STREAM, 0);
+	bzero(&saddr, sizeof(struct sockaddr_un));
+	saddr.sun_family = AF_UNIX;
+	strcpy(saddr.sun_path, path);
+	/* this will delete file on disk, beware ) */
+	unlink(path);
+	if (bind(sfd, &saddr, sizeof(struct sockaddr_un)))
+	{
+		perror("bind");
+		exit(EXIT_FAILURE);
+	}
+	/* set permissive access to socket */
+	chmod(path, 0777);
+
+	if (listen(sfd, 16) == -1)
+	{
+		perror("listen");
+		close(sfd);
+		exit(EXIT_FAILURE);
+	}
+	return sfd;
+}
+
+int
+accept_new_connection(int socket)
+{
+	int fd = -1;
+	fd = accept(socket, NULL, NULL);
+	if (fd == -1 && errno != EINTR && errno != EAGAIN
+	    && errno != EWOULDBLOCK)
+	{
+		perror("accept");
+	}
+	else
+	{
+		socket_make_non_block(fd);
+	}
+	return fd;
+}
-- 
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