diff options
Diffstat (limited to 'lib/roken/mini_inetd.c')
| -rw-r--r-- | lib/roken/mini_inetd.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/lib/roken/mini_inetd.c b/lib/roken/mini_inetd.c new file mode 100644 index 0000000..9eb114d --- /dev/null +++ b/lib/roken/mini_inetd.c @@ -0,0 +1,148 @@ +/* + * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +RCSID("$Id: mini_inetd.c 14773 2005-04-12 11:29:18Z lha $"); +#endif + +#include <err.h> +#include "roken.h" + +/* + * accept a connection on `s' and pretend it's served by inetd. + */ + +static void +accept_it (int s) +{ + int s2; + + s2 = accept(s, NULL, NULL); + if(s2 < 0) + err (1, "accept"); + close(s); + dup2(s2, STDIN_FILENO); + dup2(s2, STDOUT_FILENO); + /* dup2(s2, STDERR_FILENO); */ + close(s2); +} + +/* + * Listen on a specified port, emulating inetd. + */ + +void ROKEN_LIB_FUNCTION +mini_inetd_addrinfo (struct addrinfo *ai) +{ + int ret; + struct addrinfo *a; + int n, nalloc, i; + int *fds; + fd_set orig_read_set, read_set; + int max_fd = -1; + + for (nalloc = 0, a = ai; a != NULL; a = a->ai_next) + ++nalloc; + + fds = malloc (nalloc * sizeof(*fds)); + if (fds == NULL) + errx (1, "mini_inetd: out of memory"); + + FD_ZERO(&orig_read_set); + + for (i = 0, a = ai; a != NULL; a = a->ai_next) { + fds[i] = socket (a->ai_family, a->ai_socktype, a->ai_protocol); + if (fds[i] < 0) { + warn ("socket af = %d", a->ai_family); + continue; + } + socket_set_reuseaddr (fds[i], 1); + if (bind (fds[i], a->ai_addr, a->ai_addrlen) < 0) { + warn ("bind af = %d", a->ai_family); + close(fds[i]); + continue; + } + if (listen (fds[i], SOMAXCONN) < 0) { + warn ("listen af = %d", a->ai_family); + close(fds[i]); + continue; + } + if (fds[i] >= FD_SETSIZE) + errx (1, "fd too large"); + FD_SET(fds[i], &orig_read_set); + max_fd = max(max_fd, fds[i]); + ++i; + } + if (i == 0) + errx (1, "no sockets"); + n = i; + + do { + read_set = orig_read_set; + + ret = select (max_fd + 1, &read_set, NULL, NULL, NULL); + if (ret < 0 && errno != EINTR) + err (1, "select"); + } while (ret <= 0); + + for (i = 0; i < n; ++i) + if (FD_ISSET (fds[i], &read_set)) { + accept_it (fds[i]); + return; + } + abort (); +} + +void ROKEN_LIB_FUNCTION +mini_inetd (int port) +{ + int error; + struct addrinfo *ai, hints; + char portstr[NI_MAXSERV]; + + memset (&hints, 0, sizeof(hints)); + hints.ai_flags = AI_PASSIVE; + hints.ai_socktype = SOCK_STREAM; + hints.ai_family = PF_UNSPEC; + + snprintf (portstr, sizeof(portstr), "%d", ntohs(port)); + + error = getaddrinfo (NULL, portstr, &hints, &ai); + if (error) + errx (1, "getaddrinfo: %s", gai_strerror (error)); + + mini_inetd_addrinfo(ai); + + freeaddrinfo(ai); +} |
