diff options
| -rw-r--r-- | avahi-utils/avahi-browse.c | 593 |
1 files changed, 593 insertions, 0 deletions
diff --git a/avahi-utils/avahi-browse.c b/avahi-utils/avahi-browse.c new file mode 100644 index 0000000..09792a4 --- /dev/null +++ b/avahi-utils/avahi-browse.c @@ -0,0 +1,593 @@ +/* $Id$ */ + +/*** + This file is part of avahi. + + avahi is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + avahi is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General + Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with avahi; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdlib.h> +#include <stdio.h> +#include <getopt.h> +#include <assert.h> +#include <string.h> +#include <net/if.h> + +#include <avahi-common/simple-watch.h> +#include <avahi-common/error.h> +#include <avahi-common/malloc.h> +#include <avahi-common/domain.h> +#include <avahi-common/llist.h> +#include <avahi-client/client.h> +#include <avahi-client/lookup.h> + +#include "sigint.h" + +typedef enum { + COMMAND_HELP, + COMMAND_VERSION, + COMMAND_RUN +} Command; + +typedef struct Config { + int verbose; + int terminate_on_all_for_now; + int terminate_on_cache_exhausted; + char *domain; + char *stype; + int ignore_local; + int show_all; + Command command; + int resolve; +} Config; + + +typedef struct ServiceInfo ServiceInfo; + +struct ServiceInfo { + AvahiIfIndex interface; + AvahiProtocol protocol; + char *name, *type, *domain; + + AvahiServiceResolver *resolver; + Config *config; + + AVAHI_LLIST_FIELDS(ServiceInfo, info); +}; + +static AvahiSimplePoll *simple_poll = NULL; +static AvahiClient *client = NULL; +static int n_all_for_now = 0, n_cache_exhausted = 0, n_resolving = 0; +static AvahiStringList *browsed_types = NULL; +static ServiceInfo *services = NULL; +static int n_columns = 80; + +static void check_terminate(Config *c) { + + assert(n_all_for_now >= 0); + assert(n_cache_exhausted >= 0); + assert(n_resolving >= 0); + + if (n_all_for_now <= 0 && n_resolving <= 0) { + + if (c->verbose) { + printf(": All for now\n"); + n_all_for_now++; /* Make sure that this event is not repeated */ + } + + if (c->terminate_on_all_for_now) + avahi_simple_poll_quit(simple_poll); + } + + if (n_cache_exhausted <= 0 && n_resolving <= 0) { + + if (c->verbose) { + printf(": Cache exhausted\n"); + n_cache_exhausted++; /* Make sure that this event is not repeated */ + } + + if (c->terminate_on_cache_exhausted) + avahi_simple_poll_quit(simple_poll); + } +} + +static ServiceInfo *find_service(AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char *domain) { + ServiceInfo *i; + + for (i = services; i; i = i->info_next) + if (i->interface == interface && + i->protocol == protocol && + strcasecmp(i->name, name) == 0 && + avahi_domain_equal(i->type, type) == 0 && + avahi_domain_equal(i->domain, domain) == 0) + + return i; + + return NULL; +} + +static void service_resolver_callback( + AvahiServiceResolver *r, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiResolverEvent event, + const char *name, + const char *type, + const char *domain, + const char *host_name, + const AvahiAddress *a, + uint16_t port, + AvahiStringList *txt, + AVAHI_GCC_UNUSED AvahiLookupResultFlags flags, + void *userdata) { + + ServiceInfo *i = userdata; + + assert(r); + assert(i); + + switch (event) { + case AVAHI_RESOLVER_FOUND: { + char address[AVAHI_ADDRESS_STR_MAX], *t; + char ifname[IF_NAMESIZE]; + + avahi_address_snprint(address, sizeof(address), a); + + t = avahi_string_list_to_string(txt); + + printf("= %4s %4s %-*s %-20s %s\n" + " hostname = [%s]\n" + " address = [%s]\n" + " port = [%i]\n" + " txt = [%s]\n", + if_indextoname(interface, ifname), avahi_proto_to_string(protocol), + n_columns-35, name, type, domain, + host_name, + address, + port, + t); + avahi_free(t); + + break; + } + + case AVAHI_RESOLVER_FAILURE: + + fprintf(stderr, "Failed to resolve service '%s' of type '%s' in domain '%s': %s\n", name, type, domain, avahi_strerror(avahi_client_errno(client))); + break; + } + + + avahi_service_resolver_free(i->resolver); + i->resolver = NULL; + + assert(n_resolving > 0); + n_resolving--; + check_terminate(i->config); +} + +static ServiceInfo *add_service(Config *c, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char *domain) { + ServiceInfo *i; + + i = avahi_new(ServiceInfo, 1); + + if (c->resolve) { + if (!(i->resolver = avahi_service_resolver_new(client, interface, protocol, name, type, domain, AVAHI_PROTO_UNSPEC, 0, service_resolver_callback, i))) { + avahi_free(i); + fprintf(stderr, "Failed to resolve service '%s' of type '%s' in domain '%s': %s\n", name, type, domain, avahi_strerror(avahi_client_errno(client))); + return NULL; + } + + n_resolving++; + } else + i->resolver = NULL; + + i->interface = interface; + i->protocol = protocol; + i->name = avahi_strdup(name); + i->type = avahi_strdup(type); + i->domain = avahi_strdup(domain); + i->config = c; + + AVAHI_LLIST_PREPEND(ServiceInfo, info, services, i); + + return i; +} + +static void remove_service(Config *c, ServiceInfo *i) { + assert(c); + assert(i); + + AVAHI_LLIST_REMOVE(ServiceInfo, info, services, i); + + if (i->resolver) + avahi_service_resolver_free(i->resolver); + + avahi_free(i->name); + avahi_free(i->type); + avahi_free(i->domain); + avahi_free(i); +} + +static void service_browser_callback( + AvahiServiceBrowser *b, + AvahiIfIndex interface, + AvahiProtocol protocol, + AvahiBrowserEvent event, + const char *name, + const char *type, + const char *domain, + AvahiLookupResultFlags flags, + void *userdata) { + + Config *c = userdata; + + assert(b); + assert(c); + + switch (event) { + case AVAHI_BROWSER_NEW: { + char ifname[IF_NAMESIZE]; + if (c->ignore_local && (flags & AVAHI_LOOKUP_RESULT_LOCAL)) + break; + + if (find_service(interface, protocol, name, type, domain)) + return; + + add_service(c, interface, protocol, name, type, domain); + + printf("+ %4s %4s %-*s %-20s %s\n", if_indextoname(interface, ifname), avahi_proto_to_string(protocol), n_columns-35, name, type, domain); + break; + + } + + case AVAHI_BROWSER_REMOVE: { + char ifname[IF_NAMESIZE]; + ServiceInfo *info; + + if (!(info = find_service(interface, protocol, name, type, domain))) + return; + + remove_service(c, info); + + printf("- %4s %4s %-*s %-20s %s\n", if_indextoname(interface, ifname), avahi_proto_to_string(protocol), n_columns-35, name, type, domain); + break; + } + + case AVAHI_BROWSER_FAILURE: + fprintf(stderr, "service_browser failed: %s\n", avahi_strerror(avahi_client_errno(client))); + avahi_simple_poll_quit(simple_poll); + break; + + case AVAHI_BROWSER_CACHE_EXHAUSTED: + n_cache_exhausted --; + check_terminate(c); + break; + + case AVAHI_BROWSER_ALL_FOR_NOW: + n_all_for_now --; + check_terminate(c); + break; + } +} + +static void browse_service_type(Config *c, const char *stype, const char *domain) { + AvahiServiceBrowser *b; + AvahiStringList *i; + + assert(c); + assert(client); + assert(stype); + + for (i = browsed_types; i; i = i->next) + if (avahi_domain_equal(stype, (char*) i->text)) + return; + + if (!(b = avahi_service_browser_new( + client, + AVAHI_IF_UNSPEC, + AVAHI_PROTO_UNSPEC, + stype, + domain, + 0, + service_browser_callback, + c))) { + + fprintf(stderr, "avahi_service_browser_new() failed: %s\n", avahi_strerror(avahi_client_errno(client))); + avahi_simple_poll_quit(simple_poll); + } + + browsed_types = avahi_string_list_add(browsed_types, stype); + + n_all_for_now++; + n_cache_exhausted++; +} + +static void service_type_browser_callback( + AvahiServiceTypeBrowser *b, + AVAHI_GCC_UNUSED AvahiIfIndex interface, + AVAHI_GCC_UNUSED AvahiProtocol protocol, + AvahiBrowserEvent event, + const char *type, + const char *domain, + AVAHI_GCC_UNUSED AvahiLookupResultFlags flags, + void *userdata) { + + Config *c = userdata; + + assert(b); + assert(c); + + switch (event) { + + case AVAHI_BROWSER_NEW: + browse_service_type(c, type, domain); + break; + + case AVAHI_BROWSER_REMOVE: + /* We're dirty and never remove the browser again */ + break; + + case AVAHI_BROWSER_FAILURE: + fprintf(stderr, "service_type_browser failed: %s\n", avahi_strerror(avahi_client_errno(client))); + avahi_simple_poll_quit(simple_poll); + break; + + case AVAHI_BROWSER_CACHE_EXHAUSTED: + n_cache_exhausted --; + check_terminate(c); + break; + + case AVAHI_BROWSER_ALL_FOR_NOW: + n_all_for_now --; + check_terminate(c); + break; + } +} + +static void browse_all(Config *c) { + AvahiServiceTypeBrowser *b; + + assert(c); + + if (!(b = avahi_service_type_browser_new( + client, + AVAHI_IF_UNSPEC, + AVAHI_PROTO_UNSPEC, + c->domain, + 0, + service_type_browser_callback, + c))) { + + fprintf(stderr, "avahi_service_type_browser_new() failed: %s\n", avahi_strerror(avahi_client_errno(client))); + avahi_simple_poll_quit(simple_poll); + } + + n_cache_exhausted++; + n_all_for_now++; +} + +static void client_callback(AVAHI_GCC_UNUSED AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) { + switch (state) { + case AVAHI_CLIENT_DISCONNECTED: + fprintf(stderr, "Client disconnected, exiting.\n"); + avahi_simple_poll_quit(simple_poll); + break; + + case AVAHI_CLIENT_S_REGISTERING: + case AVAHI_CLIENT_S_RUNNING: + case AVAHI_CLIENT_S_COLLISION: + ; + } +} + +static void help(FILE *f, const char *argv0) { + fprintf(f, + "%s [options] <type>\n" + "%s [options] -a\n\n" + " -h --help Show this help\n" + " -V --version Show version\n" + " -d --domain=DOMAIN The domain to browse\n" + " -a --all Show all services, regardless of the type\n" + " -v --verbose Enable verbose mode\n" + " -t --terminate Terminate after getting or more or less complete list\n" + " -c --cache Terminate after dumping all entries from the cache\n" + " -l --ignore-local Ignore local services\n" + " -r --resolve Resolve services found\n", + argv0, argv0); +} + + +static int parse_command_line(Config *c, int argc, char *argv[]) { + int o; + + static const struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, 'V' }, + { "domain", required_argument, NULL, 'd' }, + { "all", no_argument, NULL, 'a' }, + { "verbose", no_argument, NULL, 'v' }, + { "terminate", no_argument, NULL, 't' }, + { "cache", no_argument, NULL, 'c' }, + { "ignore-local", no_argument, NULL, 'l' }, + { "resolve", no_argument, NULL, 'r' }, + { NULL, 0, NULL, 0 } + }; + + assert(c); + + c->command = COMMAND_RUN; + c->verbose = + c->terminate_on_cache_exhausted = + c->terminate_on_all_for_now = + c->show_all = + c->ignore_local = + c->resolve = 0; + c->domain = c->stype = NULL; + + opterr = 0; + while ((o = getopt_long(argc, argv, "hVd:avtclr", long_options, NULL)) >= 0) { + + switch(o) { + case 'h': + c->command = COMMAND_HELP; + break; + case 'V': + c->command = COMMAND_VERSION; + break; + case 'd': + c->domain = avahi_strdup(optarg); + break; + case 'a': + c->show_all = 1; + break; + case 'v': + c->verbose = 1; + break; + case 't': + c->terminate_on_all_for_now = 1; + break; + case 'c': + c->terminate_on_cache_exhausted = 1; + break; + case 'l': + c->ignore_local = 1; + break; + case 'r': + c->resolve = 1; + break; + default: + fprintf(stderr, "Invalid command line argument: %c\n", o); + return -1; + } + } + + if (c->command == COMMAND_RUN && !c->show_all) { + if (optind >= argc) { + fprintf(stderr, "Too few arguments\n"); + return -1; + } + + c->stype = avahi_strdup(argv[optind]); + optind++; + } + + if (optind < argc) { + fprintf(stderr, "Too many arguments\n"); + return -1; + } + + return 0; +} + +int main(int argc, char *argv[]) { + int ret = 1, error; + Config config; + const char *argv0; + char *ec; + + if ((argv0 = strrchr(argv[0], '/'))) + argv0++; + else + argv0 = argv[0]; + + if ((ec = getenv("COLUMNS"))) + n_columns = atoi(ec); + + if (n_columns < 40) + n_columns = 40; + + if (parse_command_line(&config, argc, argv) < 0) + goto fail; + + switch (config.command) { + case COMMAND_HELP: + help(stdout, argv0); + ret = 0; + break; + + case COMMAND_VERSION: + printf("%s "PACKAGE_VERSION"\n", argv0); + ret = 0; + break; + + case COMMAND_RUN: + + if (!(simple_poll = avahi_simple_poll_new())) { + fprintf(stderr, "Failed to create simple poll object.\n"); + goto fail; + } + + if (sigint_install(simple_poll) < 0) + goto fail; + + if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), client_callback, NULL, &error))) { + fprintf(stderr, "Failed to create client object: %s\n", avahi_strerror(error)); + goto fail; + } + + if (config.verbose) { + const char *version, *hn; + + if (!(version = avahi_client_get_version_string(client))) { + fprintf(stderr, "Failed to query version string: %s\n", avahi_strerror(avahi_client_errno(client))); + goto fail; + } + + if (!(hn = avahi_client_get_host_name_fqdn(client))) { + fprintf(stderr, "Failed to query host name: %s\n", avahi_strerror(avahi_client_errno(client))); + goto fail; + } + + fprintf(stderr, "Server version: %s; Host name: %s\n\n", version, hn); + fprintf(stderr, "E Ifce Prot %-*s %-20s Domain\n", n_columns-35, "Name", "Type"); + } + + if (config.show_all) + browse_all(&config); + else + browse_service_type(&config, config.stype, config.domain); + + avahi_simple_poll_loop(simple_poll); + ret = 0; + break; + } + + +fail: + + while (services) + remove_service(&config, services); + + if (client) + avahi_client_free(client); + + sigint_uninstall(); + + if (simple_poll) + avahi_simple_poll_free(simple_poll); + + avahi_free(config.domain); + avahi_free(config.stype); + + avahi_string_list_free(browsed_types); + + return ret; +} |