diff options
Diffstat (limited to 'avahi-daemon')
-rw-r--r-- | avahi-daemon/static-hosts.c | 107 |
1 files changed, 73 insertions, 34 deletions
diff --git a/avahi-daemon/static-hosts.c b/avahi-daemon/static-hosts.c index ebc358d..c0a5952 100644 --- a/avahi-daemon/static-hosts.c +++ b/avahi-daemon/static-hosts.c @@ -40,13 +40,16 @@ typedef struct StaticHost StaticHost; struct StaticHost { AvahiSEntryGroup *group; + int iteration; - char *host, *ip; + char *host; + AvahiAddress address; AVAHI_LLIST_FIELDS(StaticHost, hosts); }; static AVAHI_LLIST_HEAD(StaticHost, hosts) = NULL; +static int current_iteration = 0; static void add_static_host_to_server(StaticHost *h); static void remove_static_host_from_server(StaticHost *h); @@ -86,7 +89,7 @@ static StaticHost *static_host_new(void) { s->group = NULL; s->host = NULL; - s->ip = NULL; + s->iteration = current_iteration; AVAHI_LLIST_PREPEND(StaticHost, hosts, hosts, s); @@ -102,17 +105,25 @@ static void static_host_free(StaticHost *s) { avahi_s_entry_group_free (s->group); avahi_free(s->host); - avahi_free(s->ip); avahi_free(s); } +static StaticHost *static_host_find(const char *host, const AvahiAddress *a) { + StaticHost *h; + + assert(host); + assert(a); + + for (h = hosts; h; h = h->hosts_next) + if (!strcmp(h->host, host) && !avahi_address_cmp(a, &h->address)) + return h; + + return NULL; +} + static void add_static_host_to_server(StaticHost *h) { - AvahiAddress a; - AvahiProtocol p; - int err; - const AvahiServerConfig *config; if (!h->group) if (!(h->group = avahi_s_entry_group_new (avahi_server, entry_group_callback, h))) { @@ -120,22 +131,22 @@ static void add_static_host_to_server(StaticHost *h) return; } - if (!avahi_address_parse (h->ip, AVAHI_PROTO_UNSPEC, &a)) { - avahi_log_error("Static host name %s: avahi_address_parse failed", h->host); - return; - } + if (avahi_s_entry_group_is_empty(h->group)) { + AvahiProtocol p; + int err; + const AvahiServerConfig *config; + config = avahi_server_get_config(avahi_server); + + p = (h->address.proto == AVAHI_PROTO_INET && config->publish_a_on_ipv6) || + (h->address.proto == AVAHI_PROTO_INET6 && config->publish_aaaa_on_ipv4) ? AVAHI_PROTO_UNSPEC : h->address.proto; + + if ((err = avahi_server_add_address(avahi_server, h->group, AVAHI_IF_UNSPEC, p, 0, h->host, &h->address)) < 0) { + avahi_log_error ("Static host name %s: avahi_server_add_address failure: %s", h->host, avahi_strerror(err)); + return; + } - config = avahi_server_get_config(avahi_server); - - p = (a.proto == AVAHI_PROTO_INET && config->publish_a_on_ipv6) || - (a.proto == AVAHI_PROTO_INET6 && config->publish_aaaa_on_ipv4) ? AVAHI_PROTO_UNSPEC : a.proto; - - if ((err = avahi_server_add_address(avahi_server, h->group, AVAHI_IF_UNSPEC, p, 0, h->host, &a)) < 0) { - avahi_log_error ("Static host name %s: avahi_server_add_address failure: %s", h->host, avahi_strerror(err)); - return; + avahi_s_entry_group_commit (h->group); } - - avahi_s_entry_group_commit (h->group); } static void remove_static_host_from_server(StaticHost *h) @@ -147,36 +158,36 @@ static void remove_static_host_from_server(StaticHost *h) void static_hosts_add_to_server(void) { StaticHost *h; - for (h = hosts; h; h = h->hosts_next) { + for (h = hosts; h; h = h->hosts_next) add_static_host_to_server(h); - } } void static_hosts_remove_from_server(void) { StaticHost *h; - for (h = hosts; h; h = h->hosts_next) { + for (h = hosts; h; h = h->hosts_next) remove_static_host_from_server(h); - } } void static_hosts_load(int in_chroot) { FILE *f; unsigned int line = 0; - const char *filename = (in_chroot ? "/hosts" : AVAHI_CONFIG_DIR "/hosts"); + StaticHost *h, *next; + const char *filename = in_chroot ? "/hosts" : AVAHI_CONFIG_DIR "/hosts"; - if (!(f = fopen(filename, "r"))) - { + if (!(f = fopen(filename, "r"))) { if (errno != ENOENT) avahi_log_error ("Failed to open static hosts file: %s", strerror (errno)); return; } + current_iteration++; + while (!feof(f)) { unsigned int len; char ln[256], *s; char *host, *ip; - StaticHost *h; + AvahiAddress a; if (!fgets(ln, sizeof (ln), f)) break; @@ -209,7 +220,7 @@ void static_hosts_load(int in_chroot) { avahi_log_error("%s:%d: Error, unexpected end of line!", filename, line); avahi_free(host); avahi_free(ip); - break; + goto fail; } /* Skip over the host */ @@ -223,14 +234,42 @@ void static_hosts_load(int in_chroot) { avahi_log_error ("%s:%d: Junk on the end of the line!", filename, line); avahi_free(host); avahi_free(ip); - break; + goto fail; } - h = static_host_new(); - h->host = host; - h->ip = ip; + if (!avahi_address_parse(ip, AVAHI_PROTO_UNSPEC, &a)) { + avahi_log_error("Static host name %s: failed to parse address %s", host, ip); + avahi_free(host); + avahi_free(ip); + goto fail; + } + + avahi_free(ip); + + if ((h = static_host_find(host, &a))) + avahi_free(host); + else { + h = static_host_new(); + h->host = host; + h->address = a; + + avahi_log_info("Loading new static hostname %s.", h->host); + } + + h->iteration = current_iteration; + } + + for (h = hosts; h; h = next) { + next = h->hosts_next; + + if (h->iteration != current_iteration) { + avahi_log_info("Static hostname %s vanished, removing.", h->host); + static_host_free(h); + } } +fail: + fclose(f); } |