1 #ifndef TCP_listen_fd_hh
2 #define TCP_listen_fd_hh
11 #include <arpa/inet.h>
14 #include <netinet/in.h>
18 #include <sys/socket.h>
36 struct sockaddr_in sin;
38 listener_fd = socket(PF_INET, SOCK_STREAM, 0);
39 if (listener_fd == -1)
41 TLOG(TLVL_ERROR) <<
"Could not open listen socket! Exiting with code 1!";
42 perror(
"socket error");
47 sts = setsockopt(listener_fd, SOL_SOCKET, SO_REUSEADDR, &opt,
sizeof(opt));
50 TLOG(TLVL_ERROR) <<
"Could not set SO_REUSEADDR! Exiting with code 2!";
51 perror(
"setsockopt SO_REUSEADDR");
55 bzero((
char *)&sin,
sizeof(sin));
56 sin.sin_family = AF_INET;
57 sin.sin_port = htons(port);
58 sin.sin_addr.s_addr = INADDR_ANY;
61 sts = bind(listener_fd, reinterpret_cast<struct sockaddr *>(&sin),
sizeof(sin));
64 TLOG(TLVL_ERROR) <<
"Could not bind socket! Exiting with code 3!";
71 socklen_t arglen =
sizeof(len);
72 sts = getsockopt(listener_fd, SOL_SOCKET, SO_RCVBUF, &len, &arglen);
73 TLOG(TLVL_WARNING) <<
"RCVBUF initial: " << len <<
" sts/errno=" << sts <<
"/" << errno <<
" arglen=" << arglen
74 <<
" rcvbuf=" << rcvbuf <<
" listener_fd=" << listener_fd;
78 sts = setsockopt(listener_fd, SOL_SOCKET, SO_RCVBUF, &len, arglen);
79 if (sts == -1) TLOG(TLVL_ERROR) <<
"Error with setsockopt SNDBUF " << errno;
81 sts = getsockopt(listener_fd, SOL_SOCKET, SO_RCVBUF, &len, &arglen);
82 if (len < (rcvbuf * 2))
83 TLOG(TLVL_WARNING) <<
"RCVBUF " << len <<
" not expected (" << rcvbuf <<
" sts/errno=" << sts <<
"/" << errno;
85 TLOG(TLVL_DEBUG) <<
"RCVBUF " << len <<
" sts/errno=" << sts <<
"/" << errno;
89 sts = listen(listener_fd, 5 );
92 perror(
"listen error");
100 #endif // TCP_listen_fd_hh
int TCP_listen_fd(int port, int rcvbuf)
Create a TCP listening socket on the given port and INADDR_ANY, with the given receive buffer...