161033Sdfr/* 261033Sdfr * Copyright (c) 1995 - 2001 Kungliga Tekniska H��gskolan 361033Sdfr * (Royal Institute of Technology, Stockholm, Sweden). 461033Sdfr * All rights reserved. 561033Sdfr * 661033Sdfr * Redistribution and use in source and binary forms, with or without 761033Sdfr * modification, are permitted provided that the following conditions 861033Sdfr * are met: 961033Sdfr * 1061033Sdfr * 1. Redistributions of source code must retain the above copyright 1161033Sdfr * notice, this list of conditions and the following disclaimer. 1261033Sdfr * 1361033Sdfr * 2. Redistributions in binary form must reproduce the above copyright 1461033Sdfr * notice, this list of conditions and the following disclaimer in the 1561033Sdfr * documentation and/or other materials provided with the distribution. 1661033Sdfr * 1761033Sdfr * 3. Neither the name of the Institute nor the names of its contributors 1861033Sdfr * may be used to endorse or promote products derived from this software 1961033Sdfr * without specific prior written permission. 2061033Sdfr * 2161033Sdfr * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 2261033Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2361033Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2461033Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 2561033Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2661086Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2761033Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2861033Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2961033Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3061033Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3161033Sdfr * SUCH DAMAGE. 3261086Sdfr */ 3361086Sdfr 3461086Sdfr#include <config.h> 3561033Sdfr 3661086Sdfr#include <err.h> 37124882Srwatson#include "roken.h" 3861086Sdfr 3961033Sdfr/* 4061033Sdfr * accept a connection on `s' and pretend it's served by inetd. 4161033Sdfr */ 4261033Sdfr 4361086Sdfrstatic void 4461086Sdfraccept_it (rk_socket_t s, rk_socket_t *ret_socket) 4561086Sdfr{ 4661033Sdfr rk_socket_t as; 4761033Sdfr 4861033Sdfr as = accept(s, NULL, NULL); 4961033Sdfr if(rk_IS_BAD_SOCKET(as)) 5061086Sdfr err (1, "accept"); 5161086Sdfr 5261086Sdfr if (ret_socket) { 5361086Sdfr 54136131Simp *ret_socket = as; 5561086Sdfr 5661086Sdfr } else { 5761086Sdfr int fd = socket_to_fd(as, 0); 5861033Sdfr 5961033Sdfr /* We would use _O_RDONLY for the socket_to_fd() call for 60133305Sjmg STDIN, but there are instances where we assume that STDIN 61133305Sjmg is a r/w socket. */ 62133305Sjmg 63133305Sjmg dup2(fd, STDIN_FILENO); 64133305Sjmg dup2(fd, STDOUT_FILENO); 65133305Sjmg 6661033Sdfr rk_closesocket(as); 6761033Sdfr } 6885560Sjhb} 6985560Sjhb 7085560Sjhb/** 7185560Sjhb * Listen on a specified addresses 7285560Sjhb * 73136131Simp * Listens on the specified addresses for incoming connections. If 7485560Sjhb * the \a ret_socket parameter is \a NULL, on return STDIN and STDOUT 7561033Sdfr * will be connected to an accepted socket. If the \a ret_socket 7661033Sdfr * parameter is non-NULL, the accepted socket will be returned in 7761033Sdfr * *ret_socket. In the latter case, STDIN and STDOUT will be left 7861033Sdfr * unmodified. 7961033Sdfr * 8061033Sdfr * This function does not return if there is an error or if no 8161033Sdfr * connection is established. 8261033Sdfr * 8361033Sdfr * @param[in] ai Addresses to listen on 8461033Sdfr * @param[out] ret_socket If non-NULL receives the accepted socket. 8561086Sdfr * 8661033Sdfr * @see mini_inetd() 8761033Sdfr */ 8861033SdfrROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 8961033Sdfrmini_inetd_addrinfo (struct addrinfo *ai, rk_socket_t *ret_socket) 9061033Sdfr{ 9161033Sdfr int ret; 9261033Sdfr struct addrinfo *a; 9361086Sdfr int n, nalloc, i; 9461033Sdfr rk_socket_t *fds; 9561033Sdfr fd_set orig_read_set, read_set; 9661033Sdfr rk_socket_t max_fd = (rk_socket_t)-1; 9761033Sdfr 9861086Sdfr for (nalloc = 0, a = ai; a != NULL; a = a->ai_next) 9961086Sdfr ++nalloc; 10061086Sdfr 101133305Sjmg fds = malloc (nalloc * sizeof(*fds)); 102133305Sjmg if (fds == NULL) { 103133305Sjmg errx (1, "mini_inetd: out of memory"); 104133305Sjmg UNREACHABLE(return); 105133305Sjmg } 10661033Sdfr 10761033Sdfr FD_ZERO(&orig_read_set); 108119708Sken 109119708Sken for (i = 0, a = ai; a != NULL; a = a->ai_next) { 110119708Sken fds[i] = socket (a->ai_family, a->ai_socktype, a->ai_protocol); 11161033Sdfr if (rk_IS_BAD_SOCKET(fds[i])) 112111528Sscottl continue; 11361033Sdfr socket_set_reuseaddr (fds[i], 1); 11461033Sdfr socket_set_ipv6only(fds[i], 1); 115119708Sken if (rk_IS_SOCKET_ERROR(bind (fds[i], a->ai_addr, a->ai_addrlen))) { 116119708Sken warn ("bind af = %d", a->ai_family); 117119708Sken rk_closesocket(fds[i]); 118119708Sken fds[i] = rk_INVALID_SOCKET; 119119708Sken continue; 120119708Sken } 121119789Ssam if (rk_IS_SOCKET_ERROR(listen (fds[i], SOMAXCONN))) { 122119789Ssam warn ("listen af = %d", a->ai_family); 123119789Ssam rk_closesocket(fds[i]); 124119789Ssam fds[i] = rk_INVALID_SOCKET; 125119789Ssam continue; 126119789Ssam } 127119789Ssam#ifndef NO_LIMIT_FD_SETSIZE 128119789Ssam if (fds[i] >= FD_SETSIZE) 129119789Ssam errx (1, "fd too large"); 13061033Sdfr#endif 131 FD_SET(fds[i], &orig_read_set); 132 max_fd = max(max_fd, fds[i]); 133 ++i; 134 } 135 if (i == 0) 136 errx (1, "no sockets"); 137 n = i; 138 139 do { 140 read_set = orig_read_set; 141 142 ret = select (max_fd + 1, &read_set, NULL, NULL, NULL); 143 if (rk_IS_SOCKET_ERROR(ret) && rk_SOCK_ERRNO != EINTR) 144 err (1, "select"); 145 } while (ret <= 0); 146 147 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]); 152 free(fds); 153 return; 154 } 155 abort (); 156} 157 158/** 159 * Listen on a specified port 160 * 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. 166 * 167 * This function does not return if there is an error or if no 168 * connection is established. 169 * 170 * @param[in] port Port to listen on 171 * @param[out] ret_socket If non-NULL receives the accepted socket. 172 * 173 * @see mini_inetd_addrinfo() 174 */ 175ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 176mini_inetd(int port, rk_socket_t * ret_socket) 177{ 178 int error; 179 struct addrinfo *ai, hints; 180 char portstr[NI_MAXSERV]; 181 182 memset (&hints, 0, sizeof(hints)); 183 hints.ai_flags = AI_PASSIVE; 184 hints.ai_socktype = SOCK_STREAM; 185 hints.ai_family = PF_UNSPEC; 186 187 snprintf (portstr, sizeof(portstr), "%d", ntohs(port)); 188 189 error = getaddrinfo (NULL, portstr, &hints, &ai); 190 if (error) 191 errx (1, "getaddrinfo: %s", gai_strerror (error)); 192 193 mini_inetd_addrinfo(ai, ret_socket); 194 195 freeaddrinfo(ai); 196} 197 198