diff options
Diffstat (limited to 'avahi-utils/avahi-browse.c')
| -rw-r--r-- | avahi-utils/avahi-browse.c | 879 |
1 files changed, 879 insertions, 0 deletions
diff --git a/avahi-utils/avahi-browse.c b/avahi-utils/avahi-browse.c new file mode 100644 index 0000000..4101895 --- /dev/null +++ b/avahi-utils/avahi-browse.c @@ -0,0 +1,879 @@ +/*** + 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 <sys/types.h> +#include <sys/socket.h> +#include <net/if.h> +#include <locale.h> +#include <ctype.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-common/i18n.h> +#include <avahi-client/client.h> +#include <avahi-client/lookup.h> + +#include "sigint.h" + +#if defined(HAVE_GDBM) || defined(HAVE_DBM) +#include "stdb.h" +#endif + +typedef enum { + COMMAND_HELP, + COMMAND_VERSION, + COMMAND_BROWSE_SERVICES, + COMMAND_BROWSE_ALL_SERVICES, + COMMAND_BROWSE_DOMAINS +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + , COMMAND_DUMP_STDB +#endif +} Command; + +typedef struct Config { + int verbose; + int terminate_on_all_for_now; + int terminate_on_cache_exhausted; + char *domain; + char *stype; + int ignore_local; + Command command; + int resolve; + int no_fail; + int parsable; +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + int no_db_lookup; +#endif +} 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 int browsing = 0; + +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 && !c->parsable) { + 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 && !c->parsable) { + 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) && + avahi_domain_equal(i->domain, domain)) + + return i; + + return NULL; +} + +static char *make_printable(const char *from, char *to) { + const char *f; + char *t; + + for (f = from, t = to; *f; f++, t++) + *t = isprint(*f) ? *f : '_'; + + *t = 0; + + return to; +} + +static void print_service_line(Config *config, char c, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char *domain, int nl) { + char ifname[IF_NAMESIZE]; + +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + if (!config->no_db_lookup) + type = stdb_lookup(type); +#endif + + if (config->parsable) { + char sn[AVAHI_DOMAIN_NAME_MAX], *e = sn; + size_t l = sizeof(sn); + + printf("%c;%s;%s;%s;%s;%s%s", + c, + interface != AVAHI_IF_UNSPEC ? if_indextoname(interface, ifname) : _("n/a"), + protocol != AVAHI_PROTO_UNSPEC ? avahi_proto_to_string(protocol) : _("n/a"), + avahi_escape_label(name, strlen(name), &e, &l), type, domain, nl ? "\n" : ""); + + } else { + char label[AVAHI_LABEL_MAX]; + make_printable(name, label); + + printf("%c %6s %4s %-*s %-20s %s\n", + c, + interface != AVAHI_IF_UNSPEC ? if_indextoname(interface, ifname) : _("n/a"), + protocol != AVAHI_PROTO_UNSPEC ? avahi_proto_to_string(protocol) : _("n/a"), + n_columns-35, label, type, domain); + } + + fflush(stdout); +} + +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; + + avahi_address_snprint(address, sizeof(address), a); + + t = avahi_string_list_to_string(txt); + + print_service_line(i->config, '=', interface, protocol, name, type, domain, 0); + + if (i->config->parsable) + printf(";%s;%s;%u;%s\n", + host_name, + address, + port, + t); + else + printf(" hostname = [%s]\n" + " address = [%s]\n" + " port = [%u]\n" + " txt = [%s]\n", + 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); + fflush(stdout); +} + +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: { + 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); + + print_service_line(c, '+', interface, protocol, name, type, domain, 1); + break; + + } + + case AVAHI_BROWSER_REMOVE: { + ServiceInfo *info; + + if (!(info = find_service(interface, protocol, name, type, domain))) + return; + + remove_service(c, info); + + print_service_line(c, '-', interface, protocol, name, type, domain, 1); + 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 domain_browser_callback( + AvahiDomainBrowser *b, + AVAHI_GCC_UNUSED AvahiIfIndex interface, + AVAHI_GCC_UNUSED AvahiProtocol protocol, + AvahiBrowserEvent event, + const char *domain, + AVAHI_GCC_UNUSED AvahiLookupResultFlags flags, + void *userdata) { + + Config *c = userdata; + + assert(b); + assert(c); + + switch (event) { + + case AVAHI_BROWSER_NEW: + case AVAHI_BROWSER_REMOVE: { + char ifname[IF_NAMESIZE]; + + if (c->parsable) + printf("%c;%s;%s;%s\n", + event == AVAHI_BROWSER_NEW ? '+' : '-', + interface != AVAHI_IF_UNSPEC ? if_indextoname(interface, ifname) : "", + protocol != AVAHI_PROTO_UNSPEC ? avahi_proto_to_string(protocol) : "", + domain); + else + printf("%c %4s %4s %s\n", + event == AVAHI_BROWSER_NEW ? '+' : '-', + interface != AVAHI_IF_UNSPEC ? if_indextoname(interface, ifname) : "n/a", + protocol != AVAHI_PROTO_UNSPEC ? avahi_proto_to_string(protocol) : "n/a", + domain); + break; + } + + case AVAHI_BROWSER_FAILURE: + fprintf(stderr, ("domain_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_domains(Config *c) { + AvahiDomainBrowser *b; + + assert(c); + + if (!(b = avahi_domain_browser_new( + client, + AVAHI_IF_UNSPEC, + AVAHI_PROTO_UNSPEC, + c->domain, + AVAHI_DOMAIN_BROWSER_BROWSE, + 0, + domain_browser_callback, + c))) { + + fprintf(stderr, _("avahi_domain_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 int start(Config *config) { + + assert(!browsing); + + if (config->verbose && !config->parsable) { + 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))); + return -1; + } + + if (!(hn = avahi_client_get_host_name_fqdn(client))) { + fprintf(stderr, _("Failed to query host name: %s\n"), avahi_strerror(avahi_client_errno(client))); + return -1; + } + + fprintf(stderr, _("Server version: %s; Host name: %s\n"), version, hn); + + if (config->command == COMMAND_BROWSE_DOMAINS) { + /* Translators: This is a column heading with abbreviations for + * Event (+/-), Network Interface, Protocol (IPv4/v6), Domain */ + fprintf(stderr, _("E Ifce Prot Domain\n")); + } else { + /* Translators: This is a column heading with abbreviations for + * Event (+/-), Network Interface, Protocol (IPv4/v6), Domain */ + fprintf(stderr, _("E Ifce Prot %-*s %-20s Domain\n"), n_columns-35, _("Name"), _("Type")); + } + } + + if (config->command == COMMAND_BROWSE_SERVICES) + browse_service_type(config, config->stype, config->domain); + else if (config->command == COMMAND_BROWSE_ALL_SERVICES) + browse_all(config); + else { + assert(config->command == COMMAND_BROWSE_DOMAINS); + browse_domains(config); + } + + browsing = 1; + return 0; +} + +static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) { + Config *config = userdata; + + /* This function might be called when avahi_client_new() has not + * returned yet.*/ + client = c; + + switch (state) { + case AVAHI_CLIENT_FAILURE: + + if (config->no_fail && avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) { + int error; + + /* We have been disconnected, so let reconnect */ + + fprintf(stderr, _("Disconnected, reconnecting ...\n")); + + avahi_client_free(client); + client = NULL; + + avahi_string_list_free(browsed_types); + browsed_types = NULL; + + while (services) + remove_service(config, services); + + browsing = 0; + + if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), AVAHI_CLIENT_NO_FAIL, client_callback, config, &error))) { + fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error)); + avahi_simple_poll_quit(simple_poll); + } + + } else { + fprintf(stderr, _("Client failure, exiting: %s\n"), avahi_strerror(avahi_client_errno(c))); + avahi_simple_poll_quit(simple_poll); + } + + break; + + case AVAHI_CLIENT_S_REGISTERING: + case AVAHI_CLIENT_S_RUNNING: + case AVAHI_CLIENT_S_COLLISION: + + if (!browsing) + if (start(config) < 0) + avahi_simple_poll_quit(simple_poll); + + break; + + case AVAHI_CLIENT_CONNECTING: + + if (config->verbose && !config->parsable) + fprintf(stderr, _("Waiting for daemon ...\n")); + + break; + } +} + +static void help(FILE *f, const char *argv0) { + if (strstr(argv0, "domain")) + fprintf(f, "%s [options] \n\n", argv0); + else + fprintf(f, + "%s [options] <service type>\n" + "%s [options] -a\n" + "%s [options] -D\n" +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + "%s [options] -b\n" +#endif + "\n", +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + argv0, +#endif + argv0, argv0, argv0); + + fprintf(f, "%s%s", + _(" -h --help Show this help\n" + " -V --version Show version\n" + " -D --browse-domains Browse for browsing domains instead of services\n" + " -a --all Show all services, regardless of the type\n" + " -d --domain=DOMAIN The domain to browse in\n" + " -v --verbose Enable verbose mode\n" + " -t --terminate Terminate after dumping a 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" + " -f --no-fail Don't fail if the daemon is not available\n" + " -p --parsable Output in parsable format\n"), +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + _(" -k --no-db-lookup Don't lookup service types\n" + " -b --dump-db Dump service type database\n") +#else + "" +#endif + ); +} + +static int parse_command_line(Config *c, const char *argv0, int argc, char *argv[]) { + int o; + + static const struct option long_options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, 'V' }, + { "browse-domains", no_argument, NULL, 'D' }, + { "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' }, + { "no-fail", no_argument, NULL, 'f' }, + { "parsable", no_argument, NULL, 'p' }, +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + { "no-db-lookup", no_argument, NULL, 'k' }, + { "dump-db", no_argument, NULL, 'b' }, +#endif + { NULL, 0, NULL, 0 } + }; + + assert(c); + + c->command = strstr(argv0, "domain") ? COMMAND_BROWSE_DOMAINS : COMMAND_BROWSE_SERVICES; + c->verbose = + c->terminate_on_cache_exhausted = + c->terminate_on_all_for_now = + c->ignore_local = + c->resolve = + c->no_fail = + c->parsable = 0; + c->domain = c->stype = NULL; + +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + c->no_db_lookup = 0; +#endif + + while ((o = getopt_long(argc, argv, "hVd:avtclrDfp" +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + "kb" +#endif + , long_options, NULL)) >= 0) { + + switch(o) { + case 'h': + c->command = COMMAND_HELP; + break; + case 'V': + c->command = COMMAND_VERSION; + break; + case 'a': + c->command = COMMAND_BROWSE_ALL_SERVICES; + break; + case 'D': + c->command = COMMAND_BROWSE_DOMAINS; + break; + case 'd': + avahi_free(c->domain); + c->domain = avahi_strdup(optarg); + 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; + case 'f': + c->no_fail = 1; + break; + case 'p': + c->parsable = 1; + break; +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + case 'k': + c->no_db_lookup = 1; + break; + case 'b': + c->command = COMMAND_DUMP_STDB; + break; +#endif + default: + return -1; + } + } + + if (c->command == COMMAND_BROWSE_SERVICES) { + 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; + + avahi_init_i18n(); + setlocale(LC_ALL, ""); + + 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, argv0, 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_BROWSE_SERVICES: + case COMMAND_BROWSE_ALL_SERVICES: + case COMMAND_BROWSE_DOMAINS: + + 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), config.no_fail ? AVAHI_CLIENT_NO_FAIL : 0, client_callback, &config, &error))) { + fprintf(stderr, _("Failed to create client object: %s\n"), avahi_strerror(error)); + goto fail; + } + + avahi_simple_poll_loop(simple_poll); + ret = 0; + break; + +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + case COMMAND_DUMP_STDB: { + char *t; + stdb_setent(); + + while ((t = stdb_getent())) { + if (config.no_db_lookup) + printf("%s\n", t); + else + printf("%s\n", stdb_lookup(t)); + } + + ret = 0; + break; + } +#endif + } + + +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); + +#if defined(HAVE_GDBM) || defined(HAVE_DBM) + stdb_shutdown(); +#endif + + return ret; +} |