2 * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * accept a connection on `s' and pretend it's served by inetd.
44 accept_it (rk_socket_t s, rk_socket_t *ret_socket)
48 as = accept(s, NULL, NULL);
49 if(rk_IS_BAD_SOCKET(as))
57 int fd = socket_to_fd(as, 0);
59 /* We would use _O_RDONLY for the socket_to_fd() call for
60 STDIN, but there are instances where we assume that STDIN
63 dup2(fd, STDIN_FILENO);
64 dup2(fd, STDOUT_FILENO);
71 * Listen on a specified addresses
73 * Listens on the specified addresses for incoming connections. If
74 * the \a ret_socket parameter is \a NULL, on return STDIN and STDOUT
75 * will be connected to an accepted socket. If the \a ret_socket
76 * parameter is non-NULL, the accepted socket will be returned in
77 * *ret_socket. In the latter case, STDIN and STDOUT will be left
80 * This function does not return if there is an error or if no
81 * connection is established.
83 * @param[in] ai Addresses to listen on
84 * @param[out] ret_socket If non-NULL receives the accepted socket.
88 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
89 mini_inetd_addrinfo (struct addrinfo *ai, rk_socket_t *ret_socket)
95 fd_set orig_read_set, read_set;
96 rk_socket_t max_fd = (rk_socket_t)-1;
98 for (nalloc = 0, a = ai; a != NULL; a = a->ai_next)
101 fds = malloc (nalloc * sizeof(*fds));
103 errx (1, "mini_inetd: out of memory");
107 FD_ZERO(&orig_read_set);
109 for (i = 0, a = ai; a != NULL; a = a->ai_next) {
110 fds[i] = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
111 if (rk_IS_BAD_SOCKET(fds[i]))
113 socket_set_reuseaddr (fds[i], 1);
114 socket_set_ipv6only(fds[i], 1);
115 if (rk_IS_SOCKET_ERROR(bind (fds[i], a->ai_addr, a->ai_addrlen))) {
116 warn ("bind af = %d", a->ai_family);
117 rk_closesocket(fds[i]);
118 fds[i] = rk_INVALID_SOCKET;
121 if (rk_IS_SOCKET_ERROR(listen (fds[i], SOMAXCONN))) {
122 warn ("listen af = %d", a->ai_family);
123 rk_closesocket(fds[i]);
124 fds[i] = rk_INVALID_SOCKET;
127 #ifndef NO_LIMIT_FD_SETSIZE
128 if (fds[i] >= FD_SETSIZE)
129 errx (1, "fd too large");
131 FD_SET(fds[i], &orig_read_set);
132 max_fd = max(max_fd, fds[i]);
136 errx (1, "no sockets");
140 read_set = orig_read_set;
142 ret = select (max_fd + 1, &read_set, NULL, NULL, NULL);
143 if (rk_IS_SOCKET_ERROR(ret) && rk_SOCK_ERRNO != EINTR)
147 for (i = 0; i < n; ++i)
148 if (FD_ISSET (fds[i], &read_set)) {
149 accept_it (fds[i], ret_socket);
150 for (i = 0; i < n; ++i)
151 rk_closesocket(fds[i]);
159 * Listen on a specified port
161 * Listens on the specified port for incoming connections. If the \a
162 * ret_socket parameter is \a NULL, on return STDIN and STDOUT will be
163 * connected to an accepted socket. If the \a ret_socket parameter is
164 * non-NULL, the accepted socket will be returned in *ret_socket. In
165 * the latter case, STDIN and STDOUT will be left unmodified.
167 * This function does not return if there is an error or if no
168 * connection is established.
170 * @param[in] port Port to listen on
171 * @param[out] ret_socket If non-NULL receives the accepted socket.
173 * @see mini_inetd_addrinfo()
175 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
176 mini_inetd(int port, rk_socket_t * ret_socket)
179 struct addrinfo *ai, hints;
180 char portstr[NI_MAXSERV];
182 memset (&hints, 0, sizeof(hints));
183 hints.ai_flags = AI_PASSIVE;
184 hints.ai_socktype = SOCK_STREAM;
185 hints.ai_family = PF_UNSPEC;
187 snprintf (portstr, sizeof(portstr), "%d", ntohs(port));
189 error = getaddrinfo (NULL, portstr, &hints, &ai);
191 errx (1, "getaddrinfo: %s", gai_strerror (error));
193 mini_inetd_addrinfo(ai, ret_socket);