-/* $Id$ */
-
/***
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
#include <assert.h>
#include <string.h>
+#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/un.h>
#include <errno.h>
#include <fcntl.h>
+#include <sys/stat.h>
#include <avahi-common/llist.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
+
#include <avahi-core/log.h>
+#include <avahi-core/lookup.h>
+#include <avahi-core/dns-srv-rr.h>
#include "simple-protocol.h"
#include "main.h"
+#include "sd-daemon.h"
+
+#ifdef ENABLE_CHROOT
+#include "chroot.h"
+#endif
+
+#ifndef AF_LOCAL
+#define AF_LOCAL AF_UNIX
+#endif
+#ifndef PF_LOCAL
+#define PF_LOCAL PF_UNIX
+#endif
#define BUFFER_SIZE (20*1024)
Server *server;
ClientState state;
-
+
int fd;
AvahiWatch *watch;
AvahiSDNSServerBrowser *dns_server_browser;
AvahiProtocol afquery;
-
+
AVAHI_LLIST_FIELDS(Client, clients);
};
AVAHI_LLIST_HEAD(Client, clients);
unsigned n_clients;
- int bind_successful;
+ int remove_socket;
};
static Server *server = NULL;
c->server->poll_api->watch_free(c->watch);
close(c->fd);
-
+
AVAHI_LLIST_REMOVE(Client, clients, c->server->clients, c);
avahi_free(c);
}
static void client_output(Client *c, const uint8_t*data, size_t size) {
size_t k, m;
-
+
assert(c);
assert(data);
static void client_output_printf(Client *c, const char *format, ...) {
char *t;
va_list ap;
-
+
va_start(ap, format);
t = avahi_strdup_vprintf(format, ap);
va_end(ap);
avahi_free(t);
}
-
static void host_name_resolver_callback(
- AvahiSHostNameResolver *r,
+ AVAHI_GCC_UNUSED AvahiSHostNameResolver *r,
AvahiIfIndex iface,
AvahiProtocol protocol,
AvahiResolverEvent event,
const char *hostname,
const AvahiAddress *a,
+ AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void* userdata) {
Client *c = userdata;
-
+
assert(c);
- if (event == AVAHI_RESOLVER_TIMEOUT)
- client_output_printf(c, "%+i Query timed out\n", AVAHI_ERR_TIMEOUT);
- else {
- char t[64];
+ if (event == AVAHI_RESOLVER_FAILURE)
+ client_output_printf(c, "%+i %s\n", avahi_server_errno(avahi_server), avahi_strerror(avahi_server_errno(avahi_server)));
+ else if (event == AVAHI_RESOLVER_FOUND) {
+ char t[AVAHI_ADDRESS_STR_MAX];
avahi_address_snprint(t, sizeof(t), a);
client_output_printf(c, "+ %i %u %s %s\n", iface, protocol, hostname, t);
}
}
static void address_resolver_callback(
- AvahiSAddressResolver *r,
+ AVAHI_GCC_UNUSED AvahiSAddressResolver *r,
AvahiIfIndex iface,
AvahiProtocol protocol,
AvahiResolverEvent event,
- const AvahiAddress *a,
+ AVAHI_GCC_UNUSED const AvahiAddress *a,
const char *hostname,
+ AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void* userdata) {
-
+
Client *c = userdata;
-
+
assert(c);
- if (event == AVAHI_RESOLVER_TIMEOUT)
- client_output_printf(c, "%+i Query timed out\n", AVAHI_ERR_TIMEOUT);
- else
+ if (event == AVAHI_RESOLVER_FAILURE)
+ client_output_printf(c, "%+i %s\n", avahi_server_errno(avahi_server), avahi_strerror(avahi_server_errno(avahi_server)));
+ else if (event == AVAHI_RESOLVER_FOUND)
client_output_printf(c, "+ %i %u %s\n", iface, protocol, hostname);
c->state = CLIENT_DEAD;
}
static void dns_server_browser_callback(
- AvahiSDNSServerBrowser *b,
+ AVAHI_GCC_UNUSED AvahiSDNSServerBrowser *b,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiBrowserEvent event,
- const char *host_name,
+ AVAHI_GCC_UNUSED const char *host_name,
const AvahiAddress *a,
uint16_t port,
+ AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
void* userdata) {
-
+
Client *c = userdata;
- char t[64];
-
+ char t[AVAHI_ADDRESS_STR_MAX];
+
assert(c);
if (!a)
return;
- avahi_address_snprint(t, sizeof(t), a);
- client_output_printf(c, "%c %i %u %s %u\n", event == AVAHI_BROWSER_NEW ? '>' : '<', interface, protocol, t, port);
+ switch (event) {
+ case AVAHI_BROWSER_FAILURE:
+ client_output_printf(c, "%+i %s\n", avahi_server_errno(avahi_server), avahi_strerror(avahi_server_errno(avahi_server)));
+ c->state = CLIENT_DEAD;
+ break;
+
+ case AVAHI_BROWSER_ALL_FOR_NOW:
+ case AVAHI_BROWSER_CACHE_EXHAUSTED:
+ break;
+
+ case AVAHI_BROWSER_NEW:
+ case AVAHI_BROWSER_REMOVE:
+
+ avahi_address_snprint(t, sizeof(t), a);
+ client_output_printf(c, "%c %i %u %s %u\n", event == AVAHI_BROWSER_NEW ? '>' : '<', interface, protocol, t, port);
+ break;
+ }
}
static void handle_line(Client *c, const char *s) {
c->state = CLIENT_DEAD;
} else if (strcmp(cmd, "RESOLVE-HOSTNAME-IPV4") == 0 && n_args == 2) {
c->state = CLIENT_RESOLVE_HOSTNAME;
- if (!(c->host_name_resolver = avahi_s_host_name_resolver_new(avahi_server, -1, AF_UNSPEC, arg, c->afquery = AF_INET, host_name_resolver_callback, c)))
+ if (!(c->host_name_resolver = avahi_s_host_name_resolver_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, arg, c->afquery = AVAHI_PROTO_INET, AVAHI_LOOKUP_USE_MULTICAST, host_name_resolver_callback, c)))
goto fail;
+
+ avahi_log_debug(__FILE__": Got %s request for '%s'.", cmd, arg);
} else if (strcmp(cmd, "RESOLVE-HOSTNAME-IPV6") == 0 && n_args == 2) {
c->state = CLIENT_RESOLVE_HOSTNAME;
- if (!(c->host_name_resolver = avahi_s_host_name_resolver_new(avahi_server, -1, AF_UNSPEC, arg, c->afquery = AF_INET6, host_name_resolver_callback, c)))
+ if (!(c->host_name_resolver = avahi_s_host_name_resolver_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, arg, c->afquery = AVAHI_PROTO_INET6, AVAHI_LOOKUP_USE_MULTICAST, host_name_resolver_callback, c)))
goto fail;
+
+ avahi_log_debug(__FILE__": Got %s request for '%s'.", cmd, arg);
} else if (strcmp(cmd, "RESOLVE-HOSTNAME") == 0 && n_args == 2) {
c->state = CLIENT_RESOLVE_HOSTNAME;
- if (!(c->host_name_resolver = avahi_s_host_name_resolver_new(avahi_server, -1, AF_UNSPEC, arg, c->afquery = AF_UNSPEC, host_name_resolver_callback, c)))
+ if (!(c->host_name_resolver = avahi_s_host_name_resolver_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, arg, c->afquery = AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_MULTICAST, host_name_resolver_callback, c)))
goto fail;
+
+ avahi_log_debug(__FILE__": Got %s request for '%s'.", cmd, arg);
} else if (strcmp(cmd, "RESOLVE-ADDRESS") == 0 && n_args == 2) {
AvahiAddress addr;
-
- if (!(avahi_address_parse(arg, AF_UNSPEC, &addr))) {
+
+ if (!(avahi_address_parse(arg, AVAHI_PROTO_UNSPEC, &addr))) {
client_output_printf(c, "%+i Failed to parse address \"%s\".\n", AVAHI_ERR_INVALID_ADDRESS, arg);
c->state = CLIENT_DEAD;
} else {
c->state = CLIENT_RESOLVE_ADDRESS;
- if (!(c->address_resolver = avahi_s_address_resolver_new(avahi_server, -1, AF_UNSPEC, &addr, address_resolver_callback, c)))
+ if (!(c->address_resolver = avahi_s_address_resolver_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, &addr, AVAHI_LOOKUP_USE_MULTICAST, address_resolver_callback, c)))
goto fail;
}
+
+ avahi_log_debug(__FILE__": Got %s request for '%s'.", cmd, arg);
+
} else if (strcmp(cmd, "BROWSE-DNS-SERVERS-IPV4") == 0 && n_args == 1) {
c->state = CLIENT_BROWSE_DNS_SERVERS;
- if (!(c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, -1, AF_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery = AF_INET, dns_server_browser_callback, c)))
+ if (!(c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery = AVAHI_PROTO_INET, AVAHI_LOOKUP_USE_MULTICAST, dns_server_browser_callback, c)))
goto fail;
client_output_printf(c, "+ Browsing ...\n");
+
+ avahi_log_debug(__FILE__": Got %s request.", cmd);
+
} else if (strcmp(cmd, "BROWSE-DNS-SERVERS-IPV6") == 0 && n_args == 1) {
c->state = CLIENT_BROWSE_DNS_SERVERS;
- if (!(c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, -1, AF_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery = AF_INET6, dns_server_browser_callback, c)))
+ if (!(c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery = AVAHI_PROTO_INET6, AVAHI_LOOKUP_USE_MULTICAST, dns_server_browser_callback, c)))
goto fail;
client_output_printf(c, "+ Browsing ...\n");
+
+ avahi_log_debug(__FILE__": Got %s request.", cmd);
+
} else if (strcmp(cmd, "BROWSE-DNS-SERVERS") == 0 && n_args == 1) {
c->state = CLIENT_BROWSE_DNS_SERVERS;
- if (!(c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, -1, AF_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery = AF_UNSPEC, dns_server_browser_callback, c)))
+ if (!(c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery = AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_USE_MULTICAST, dns_server_browser_callback, c)))
goto fail;
client_output_printf(c, "+ Browsing ...\n");
+
+ avahi_log_debug(__FILE__": Got %s request.", cmd);
+
} else {
client_output_printf(c, "%+i Invalid command \"%s\", try \"HELP\".\n", AVAHI_ERR_INVALID_OPERATION, cmd);
c->state = CLIENT_DEAD;
+
+ avahi_log_debug(__FILE__": Got invalid request '%s'.", cmd);
}
return;
k = e - (char*) c->inbuf;
*e = 0;
-
+
handle_line(c, c->inbuf);
c->inbuf_length -= k + 1;
memmove(c->inbuf, e+1, c->inbuf_length);
}
}
-static void client_work(AvahiWatch *watch, int fd, AvahiWatchEvent events, void *userdata) {
+static void client_work(AvahiWatch *watch, AVAHI_GCC_UNUSED int fd, AvahiWatchEvent events, void *userdata) {
Client *c = userdata;
assert(c);
if ((events & AVAHI_WATCH_IN) && c->inbuf_length < sizeof(c->inbuf)) {
ssize_t r;
-
+
if ((r = read(c->fd, c->inbuf + c->inbuf_length, sizeof(c->inbuf) - c->inbuf_length)) <= 0) {
if (r < 0)
avahi_log_warn("read(): %s", strerror(errno));
assert((size_t) r <= c->outbuf_length);
c->outbuf_length -= r;
-
+
if (c->outbuf_length)
memmove(c->outbuf, c->outbuf + r, c->outbuf_length - r);
}
c->server->poll_api->watch_update(
- watch,
+ watch,
(c->outbuf_length > 0 ? AVAHI_WATCH_OUT : 0) |
(c->inbuf_length < sizeof(c->inbuf) ? AVAHI_WATCH_IN : 0));
}
-static void server_work(AvahiWatch *watch, int fd, AvahiWatchEvent events, void *userdata) {
+static void server_work(AVAHI_GCC_UNUSED AvahiWatch *watch, int fd, AvahiWatchEvent events, void *userdata) {
Server *s = userdata;
assert(s);
client_new(s, cfd);
}
}
-
+
int simple_protocol_setup(const AvahiPoll *poll_api) {
struct sockaddr_un sa;
mode_t u;
+ int n;
assert(!server);
server = avahi_new(Server, 1);
server->poll_api = poll_api;
- server->bind_successful = 0;
+ server->remove_socket = 0;
server->fd = -1;
server->n_clients = 0;
AVAHI_LLIST_HEAD_INIT(Client, server->clients);
server->watch = NULL;
-
+
u = umask(0000);
- if ((server->fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
- avahi_log_warn("socket(PF_LOCAL, SOCK_STREAM, 0): %s", strerror(errno));
+ if ((n = sd_listen_fds(1)) < 0) {
+ avahi_log_warn("Failed to acquire systemd file descriptors: %s", strerror(-n));
goto fail;
}
- memset(&sa, 0, sizeof(sa));
- sa.sun_family = AF_LOCAL;
- strncpy(sa.sun_path, AVAHI_SOCKET, sizeof(sa.sun_path)-1);
-
- /* We simply remove existing UNIX sockets under this name. The
- Avahi daemons makes sure that it runs only once on a host,
- therefore sockets that already exist are stale and may be
- removed without any ill effects */
-
- unlink(AVAHI_SOCKET);
-
- if (bind(server->fd, &sa, sizeof(sa)) < 0) {
- avahi_log_warn("bind(): %s", strerror(errno));
+ if (n > 1) {
+ avahi_log_warn("Too many systemd file descriptors passed.");
goto fail;
}
- server->bind_successful = 1;
-
- if (listen(server->fd, 2) < 0) {
- avahi_log_warn("listen(): %s", strerror(errno));
- goto fail;
+ if (n == 1) {
+ int r;
+
+ if ((r = sd_is_socket(SD_LISTEN_FDS_START, AF_LOCAL, SOCK_STREAM, 1)) < 0) {
+ avahi_log_warn("Passed systemd file descriptor is of wrong type: %s", strerror(-r));
+ goto fail;
+ }
+
+ server->fd = SD_LISTEN_FDS_START;
+
+ } else {
+
+ if ((server->fd = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0) {
+ avahi_log_warn("socket(AF_LOCAL, SOCK_STREAM, 0): %s", strerror(errno));
+ goto fail;
+ }
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sun_family = AF_LOCAL;
+ strncpy(sa.sun_path, AVAHI_SOCKET, sizeof(sa.sun_path)-1);
+
+ /* We simply remove existing UNIX sockets under this name. The
+ Avahi daemon makes sure that it runs only once on a host,
+ therefore sockets that already exist are stale and may be
+ removed without any ill effects */
+
+ unlink(AVAHI_SOCKET);
+
+ if (bind(server->fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
+ avahi_log_warn("bind(): %s", strerror(errno));
+ goto fail;
+ }
+
+ server->remove_socket = 1;
+
+ if (listen(server->fd, SOMAXCONN) < 0) {
+ avahi_log_warn("listen(): %s", strerror(errno));
+ goto fail;
+ }
}
umask(u);
server->watch = poll_api->watch_new(poll_api, server->fd, AVAHI_WATCH_IN, server_work, server);
-
+
return 0;
fail:
-
+
umask(u);
simple_protocol_shutdown();
if (server) {
- if (server->bind_successful)
+ if (server->remove_socket)
+#ifdef ENABLE_CHROOT
+ avahi_chroot_helper_unlink(AVAHI_SOCKET);
+#else
unlink(AVAHI_SOCKET);
+#endif
while (server->clients)
client_free(server->clients);
if (server->watch)
server->poll_api->watch_free(server->watch);
-
+
if (server->fd >= 0)
close(server->fd);
avahi_free(server);
-
+
server = NULL;
}
}
Client *c;
/* Restart queries in case of local domain name changes */
-
+
assert(server);
for (c = server->clients; c; c = c->clients_next)
if (c->state == CLIENT_BROWSE_DNS_SERVERS && c->dns_server_browser) {
avahi_s_dns_server_browser_free(c->dns_server_browser);
- c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, -1, AF_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery, dns_server_browser_callback, c);
+ c->dns_server_browser = avahi_s_dns_server_browser_new(avahi_server, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, NULL, AVAHI_DNS_SERVER_RESOLVE, c->afquery, AVAHI_LOOKUP_USE_MULTICAST, dns_server_browser_callback, c);
}
}
-
-
projects / catta / blobdiff