/*
- * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <regex.h>
#include <sys/time.h>
-#include <dirent.h>
#include <sys/socket.h>
#include <netinet/udp.h>
#include <net/if.h>
#include <osl.h>
+#include <stdbool.h>
#include "server.cmdline.h"
#include "para.h"
#include "fd.h"
#include "sched.h"
#include "close_on_fork.h"
-#include "chunk_queue.h"
/**
* Time window during which ICMP Destination/Port Unreachable messages are
/** Describes one entry in the list of targets for the udp sender. */
struct udp_target {
- /** The hostname (DNS name or IPv4/v6 address string). */
- char host[MAX_HOSTLEN];
- /** The UDP port. */
- int port;
/** Track time (seconds) of last ICMP Port Unreachable error */
time_t last_unreachable;
- /** Common sender client data */
- struct sender_client *sc;
/** The opaque structure returned by vss_add_fec_client(). */
struct fec_client *fc;
/** The FEC parameters for this target. */
static void udp_close_target(struct sender_client *sc)
{
- if (sc->cq != NULL) {
- del_close_on_fork_list(sc->fd);
- cq_destroy(sc->cq);
- free(sc->name);
- sc->name = NULL;
- sc->cq = NULL;
+ const char *buf;
+ size_t len = vss_get_fec_eof_packet(&buf);
- }
+ /*
+ * Ignore the return value of wirte() since we are closing the target
+ * anyway. The sole purpose of the "do_nothing" statement is to silence
+ * gcc.
+ */
+ if (write(sc->fd, buf, len))
+ do_nothing;
}
-static void udp_delete_target(struct udp_target *ut, const char *msg)
+static void udp_delete_target(struct sender_client *sc, const char *msg)
{
+ struct udp_target *ut = sc->private_data;
- PARA_NOTICE_LOG("deleting %s#%d (%s) from list\n", ut->host,
- ut->port, msg);
- udp_close_target(ut->sc);
+ PARA_NOTICE_LOG("deleting %s (%s) from list\n", sc->name, msg);
+ udp_close_target(sc);
+ close(sc->fd);
+ del_close_on_fork_list(sc->fd);
vss_del_fec_client(ut->fc);
- list_del(&ut->sc->node);
- free(ut->sc);
+ list_del(&sc->node);
+ free(sc->name);
+ free(sc);
free(ut);
}
if (getpeername(sc->fd, (struct sockaddr *)&ss, &sslen) < 0)
goto err;
+ assert(ss.ss_family == AF_INET || ss.ss_family == AF_INET6);
/* RFC 3493, 5.2: -1 means 'use kernel default' */
if (ttl < 0 || ttl > 255)
if (setsockopt(sc->fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl)) < 0)
break;
return 0;
- default:
- PARA_ERROR_LOG("address family %d not supported", ss.ss_family);
- return -E_ADDRESS_LOOKUP;
}
err:
return -ERRNO_TO_PARA_ERROR(errno);
}
-/** The maximal size of the per-target chunk queue. */
-#define UDP_CQ_BYTES 40000
-
static void udp_init_session(struct sender_client *sc)
{
- if (sc->cq == NULL) {
- add_close_on_fork_list(sc->fd);
- sc->cq = cq_new(UDP_CQ_BYTES);
- sc->name = para_strdup(remote_name(sc->fd));
- PARA_NOTICE_LOG("sending to udp %s\n", sc->name);
- }
+ PARA_NOTICE_LOG("sending to udp %s\n", sc->name);
}
static void udp_shutdown_targets(void)
{
struct sender_client *sc, *tmp;
- const char *buf;
- size_t len = vss_get_fec_eof_packet(&buf);
-
list_for_each_entry_safe(sc, tmp, &targets, node)
- if (sc->cq != NULL) {
- /* ignore return value, closing the target anyway. */
- (void)write(sc->fd, buf, len);
- udp_close_target(sc);
- }
+ udp_close_target(sc);
+}
+
+static int udp_resolve_target(const char *url, struct sender_command_data *scd)
+{
+ const char *result;
+ int ret, port;
+
+ ret = parse_fec_url(url, scd);
+ if (ret)
+ return ret;
+ port = scd->port > 0 ? scd->port : conf.udp_default_port_arg;
+
+ ret = para_connect_simple(IPPROTO_UDP, scd->host, port);
+ if (ret < 0)
+ return ret;
+
+ result = remote_name(ret);
+ close(ret);
+
+ if (!parse_url(result, scd->host, sizeof(scd->host), &scd->port))
+ return -E_ADDRESS_LOOKUP;
+ return 1;
}
static int udp_com_on(__a_unused struct sender_command_data *scd)
return 1;
}
-static int udp_com_delete(struct sender_command_data *scd)
+static struct sender_client *udp_lookup_target(struct sender_command_data *scd)
{
struct sender_client *sc, *tmp;
+ char host[MAX_HOSTLEN];
+ int32_t port;
list_for_each_entry_safe(sc, tmp, &targets, node) {
- struct udp_target *ut = sc->private_data;
+ parse_url(sc->name, host, sizeof(host), &port);
/* Unspecified port means wildcard port match */
- if (scd->port > 0 && scd->port != ut->port)
+ if (scd->port > 0 && scd->port != port)
continue;
- if (strcmp(ut->host, scd->host))
+ if (strcmp(host, scd->host))
continue;
- udp_delete_target(ut, "com_delete");
+ return sc;
}
- return 1;
+ return NULL;
+}
+
+static int udp_com_delete(struct sender_command_data *scd)
+{
+ struct sender_client *sc = udp_lookup_target(scd);
+
+ if (sc) {
+ udp_delete_target(sc, "com_delete");
+ return 1;
+ }
+ PARA_NOTICE_LOG("not deleting non-existing target '%s'\n", scd->host);
+ return -E_TARGET_NOT_FOUND;
}
/** Initialize UDP session and set maximum payload size. */
}
/** Check and clear socket error if any. */
-static int udp_check_socket_state(struct udp_target *ut)
+static int udp_check_socket_state(struct sender_client *sc)
{
+ struct udp_target *ut = sc->private_data;
int ret;
socklen_t errlen = sizeof(ret);
- if (getsockopt(ut->sc->fd, SOL_SOCKET, SO_ERROR, &ret, &errlen) < 0) {
+ if (getsockopt(sc->fd, SOL_SOCKET, SO_ERROR, &ret, &errlen) < 0) {
PARA_ERROR_LOG("SO_ERROR failed: %s\n", strerror(ret));
return 0;
} else if (ret == 0) {
* unreachable_time < dist <= 2 * unreachable_time
* No errors are allowed during this time window.
*/
- PARA_NOTICE_LOG("Evicting %s#%d after %d seconds "
+ PARA_NOTICE_LOG("Evicting %s after %d seconds "
"of connection errors.\n",
- ut->host, ut->port, (int)dist);
+ sc->name, (int)dist);
}
}
return -ERRNO_TO_PARA_ERROR(ret);
static int udp_send_fec(struct sender_client *sc, char *buf, size_t len)
{
- struct udp_target *ut = sc->private_data;
int ret;
if (sender_status == SENDER_OFF)
return 0;
- if (len == 0 && !cq_peek(ut->sc->cq))
+ if (len == 0)
return 0;
- ret = udp_check_socket_state(ut);
- if (ret < 0)
- goto fail;
- ret = send_queued_chunks(sc->fd, sc->cq);
+ ret = udp_check_socket_state(sc);
if (ret < 0)
goto fail;
- if (!ret) { /* still data left in the queue */
- ret = cq_force_enqueue(sc->cq, buf, len);
- assert(ret >= 0);
- return 0;
- }
ret = write_nonblock(sc->fd, buf, len);
if (ret == -ERRNO_TO_PARA_ERROR(ECONNREFUSED)) {
/*
}
if (ret < 0)
goto fail;
- if (ret != len) {
- ret = cq_force_enqueue(sc->cq, buf + ret, len - ret);
- assert(ret >= 0);
- }
return 1;
fail:
- udp_delete_target(ut, para_strerror(-ret));
+ udp_delete_target(sc, para_strerror(-ret));
return ret;
}
-static void udp_add_target(struct sender_command_data *scd)
+static int udp_com_add(struct sender_command_data *scd)
{
- int ret, port = scd->port > 0 ? scd->port : conf.udp_default_port_arg;
- struct udp_target *ut = para_calloc(sizeof(*ut));
-
- strncpy(ut->host, scd->host, sizeof(ut->host));
- ut->port = scd->port > 0 ? scd->port : conf.udp_default_port_arg;
+ int ret;
+ struct udp_target *ut;
+ struct sender_client *sc = udp_lookup_target(scd);
+ if (sc) {
+ PARA_NOTICE_LOG("target %s already exists - not adding it\n",
+ sc->name);
+ return -E_TARGET_EXISTS;
+ }
+ ut = para_calloc(sizeof(*ut));
+ sc = para_calloc(sizeof(*sc));
ut->fcp.slices_per_group = scd->slices_per_group;
ut->fcp.data_slices_per_group = scd->data_slices_per_group;
- ut->fcp.max_slice_bytes = scd->max_slice_bytes;
ut->fcp.init_fec = udp_init_fec;
ut->fcp.send_fec = udp_send_fec;
+ ut->fcp.need_periodic_header = true;
- ut->sc = para_calloc(sizeof(*ut->sc));
- ut->sc->private_data = ut;
- ut->sc->fd = -1;
- ret = para_connect_simple(IPPROTO_UDP, scd->host, port);
+ sc->private_data = ut;
+ sc->fd = -1;
+ ret = para_connect_simple(IPPROTO_UDP, scd->host, scd->port);
if (ret < 0)
goto err;
- ut->sc->fd = ret;
+ sc->fd = ret;
- ret = mcast_sender_setup(ut->sc);
+ ret = mcast_sender_setup(sc);
if (ret < 0)
goto err;
- ret = mark_fd_nonblocking(ut->sc->fd);
+ ret = mark_fd_nonblocking(sc->fd);
if (ret < 0)
goto err;
- PARA_INFO_LOG("adding to target list (%s#%d)\n", ut->host, ut->port);
- ut->fc = vss_add_fec_client(ut->sc, &ut->fcp);
- para_list_add(&ut->sc->node, &targets);
- return;
+ sc->name = para_strdup(remote_name(sc->fd));
+ PARA_INFO_LOG("adding to target list (%s)\n", sc->name);
+ ut->fc = vss_add_fec_client(sc, &ut->fcp);
+ para_list_add(&sc->node, &targets);
+ add_close_on_fork_list(sc->fd);
+ return 1;
err:
- if (ut->sc->fd >= 0)
- close(ut->sc->fd);
- PARA_NOTICE_LOG("failed to set up %s#%d (%s)- not adding it\n",
- scd->host, port, para_strerror(-ret));
- free(ut->sc);
+ if (sc->fd >= 0)
+ close(sc->fd);
+ PARA_NOTICE_LOG("failed to set up %s:%d (%s)- not adding it\n",
+ scd->host, scd->port, para_strerror(-ret));
+ free(sc);
free(ut);
-}
-
-static int udp_com_add(struct sender_command_data *scd)
-{
- udp_add_target(scd);
- return 1;
+ return ret;
}
static char *udp_info(void)
list_for_each_entry(sc, &targets, node) {
struct udp_target *ut = sc->private_data;
- bool is_v6 = strchr(ut->host, ':') != NULL;
- char *tmp = make_message("%s%s%s%s:%d/%u:%u:%u ", tgts ? : "",
- is_v6 ? "[" : "", ut->host,
- is_v6 ? "]" : "", ut->port,
- ut->fcp.max_slice_bytes,
+ char *tmp = make_message("%s%s/%u:%u ",
+ tgts ? : "", sc->name,
ut->fcp.data_slices_per_group,
ut->fcp.slices_per_group
);
INIT_LIST_HEAD(&targets);
for (i = 0; i < conf.udp_target_given; i++) {
- if (parse_fec_url(conf.udp_target_arg[i], &scd) < 0) {
- PARA_CRIT_LOG("syntax error for udp target option "
- "#%d, ignoring\n", i);
- continue;
- }
- udp_add_target(&scd);
+ if (udp_resolve_target(conf.udp_target_arg[i], &scd) < 0)
+ PARA_CRIT_LOG("not adding requested target '%s'\n",
+ conf.udp_target_arg[i]);
+ else
+ udp_com_add(&scd);
}
}
{
return make_message(
"usage: {on|off}\n"
- "usage: {add|delete} host[:port][/packet_size:k:n]\n"
+ "usage: {add|delete} ip_address[:port][/[packet_size:]k:n]\n"
+ " - k is the number of data slices per FEC group\n"
+ " - n is the total number of slices in a FEC group\n"
+ " - packet_size reduces the slice size below path MTU\n\n"
"examples: add 224.0.1.38:1500 (IPv4 multicast)\n"
- " add 224.0.1.38:1500/1400:14:16\n"
- " (likewise, using 1400 byte packets, with 14\n"
- " data slices per 16 slice FEC group)\n"
+ " add 224.0.1.38:8080/14:16 (explicit FEC)\n"
" add 10.10.1.42 (using default port)\n"
" add [FF05::42]:1500 (IPv6 multicast)\n"
" add [::1] (IPv6 localhost/default port)\n"
" delete myhost.net (host with port wildcard)\n"
+ " delete 10.1.2.3:456 (IPv4 with explicit port)\n"
" delete [badc0de::1] (IPv6 with port wildcard)\n"
);
}
s->pre_select = NULL;
s->post_select = NULL;
s->shutdown_clients = udp_shutdown_targets;
+ s->resolve_target = udp_resolve_target;
s->client_cmds[SENDER_ON] = udp_com_on;
s->client_cmds[SENDER_OFF] = udp_com_off;
s->client_cmds[SENDER_DENY] = NULL;
projects / paraslash.git / blobdiff