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/* 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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