diff options
Diffstat (limited to 'network_cmds/mnc.tproj/mnc_opts.c')
| -rw-r--r-- | network_cmds/mnc.tproj/mnc_opts.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/network_cmds/mnc.tproj/mnc_opts.c b/network_cmds/mnc.tproj/mnc_opts.c new file mode 100644 index 0000000..606746f --- /dev/null +++ b/network_cmds/mnc.tproj/mnc_opts.c @@ -0,0 +1,182 @@ +/* + * $Id: mnc_opts.c,v 1.3 2004/09/22 16:02:26 colmmacc Exp $ + * + * mnc_opts.c -- Multicast NetCat + * + * Colm MacCarthaigh, <colm@apache.org> + * + * Copyright (c) 2007, Colm MacCarthaigh. + * Copyright (c) 2004 - 2006, HEAnet Ltd. + * + * This software is an open source. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 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. + * + * Neither the name of the HEAnet Ltd. 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 COPYRIGHT HOLDERS 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 REGENTS 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. + * + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#ifndef WINDOWS + +/* UNIX-y includes */ +#include <sys/types.h> +#include <sys/socket.h> +#include <netdb.h> +#else + +/* WINDOWS-y includes */ +#include <winsock2.h> +#include <ws2tcpip.h> +#endif + +#include "mnc.h" + +/* Display a usage statement */ +void usage(void) +{ + fprintf(stderr, + "Usage: mnc [-l] [-i interface] [-p port] group-id " + "[source-address]\n\n" + "-l : listen mode\n" + "-i : specify interface to listen\n" + "-p : specify port to listen/send on\n\n"); + exit(1); +} + +struct mnc_configuration * parse_arguments(int argc, char **argv) +{ + /* Utility variables */ + int optind, + errorcode; + struct addrinfo hints; + + /* Our persisting configuration */ + static struct mnc_configuration config; + + /* Set some defaults */ + config.mode = SENDER; + config.port = MNC_DEFAULT_PORT; + config.iface = NULL; + config.source = NULL; + + /* Loop through the arguments */ + for (optind = 1; optind < (argc - 1); optind++) + { + if ( (argv[optind][0] == '-') || (argv[optind][0] == '/') ) + { + switch(argv[optind][1]) + { + /* Set listening mode */ + case 'l': config.mode = LISTENER; + break; + + /* Set port */ + case 'p': config.port = argv[++optind]; + break; + + /* Set an interface */ + case 'i': config.iface = argv[++optind]; + break; + + /* Unrecognised option */ + default: usage(); + break; + } + } + else + { + /* assume we've ran out of options */ + break; + } + } + + /* There's a chance we were passed one option */ + if (optind >= argc || argv[optind][0] == '-') + { + usage(); + } + + /* Now make sure we have either exactly 1 or 2 more arguments */ + if ( (argc - optind) != 1 && (argc - optind) != 2 ) + { + /* We have not been given the right ammount of + arguments */ + usage(); + } + + /* You can't have an interface without also listening */ + if (config.mode == SENDER && config.iface != NULL) + { + mnc_error("You may only specify the interface when in" + " listening mode\n"); + } + + /* Set some hints for getaddrinfo */ + memset(&hints, 0, sizeof(hints)); + + /* We want a UDP socket */ + hints.ai_socktype = SOCK_DGRAM; + + /* Don't do any name-lookups */ + hints.ai_flags = AI_NUMERICHOST; + + /* Get the group-id information */ + if ( (errorcode = + getaddrinfo(argv[optind], config.port, &hints, &config.group)) != 0) + { + mnc_error("Error getting group-id address information: %s\n", + gai_strerror(errorcode)); + } + + /* Move on to next argument */ + optind++; + + /* Get the source information */ + if ( (argc - optind) == 1) + { + + if ( (errorcode = + getaddrinfo(argv[optind], config.port, &hints, &config.source)) + != 0) + { + mnc_error("Error getting source-address information: %s\n", + gai_strerror(errorcode)); + } + + /* Confirm that the source and group are in the same Address Family */ + if ( config.source->ai_family != config.group->ai_family ) + { + mnc_error("Group ID and Source address are not of " + "the same type\n"); + } + } + + return &config; +} |