/*
- * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2013 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <regex.h>
#include <sys/types.h>
-#include <dirent.h>
#include "para.h"
#include "error.h"
#include "list.h"
#include "sched.h"
#include "ggo.h"
+#include "buffer_tree.h"
#include "recv.h"
#include "string.h"
#include "net.h"
#include "dccp_recv.cmdline.h"
-/** the size of the output buffer */
-#define DCCP_BUFSIZE 40960
-
-/**
- * data specific to the dccp receiver
- *
- * \sa receiver receiver_node
- */
-struct private_dccp_recv_data {
- /** the file descriptor for the dccp socket */
- int fd;
-};
-
-
static void dccp_recv_close(struct receiver_node *rn)
{
-
- struct private_dccp_recv_data *pdd = rn->private_data;
-
- if (pdd && pdd->fd > 0)
- close(pdd->fd);
- free(rn->buf);
- rn->buf = NULL;
- free(rn->private_data);
- rn->private_data = NULL;
+ if (rn->fd > 0)
+ close(rn->fd);
+ btr_pool_free(rn->btrp);
}
-
static int dccp_recv_open(struct receiver_node *rn)
{
- struct private_dccp_recv_data *pdd;
struct dccp_recv_args_info *conf = rn->conf;
- int fd, ret = makesock(AF_UNSPEC, IPPROTO_DCCP, 0, conf->host_arg,
- conf->port_arg);
+ struct flowopts *fo = NULL;
+ uint8_t *ccids = NULL;
+ int fd, ret, i;
- if (ret < 0)
- return ret;
- fd = ret;
+ /* Copy CCID preference list (u8 array required) */
+ if (conf->ccid_given) {
+ ccids = para_malloc(conf->ccid_given);
+ fo = flowopt_new();
+
+ for (i = 0; i < conf->ccid_given; i++)
+ ccids[i] = conf->ccid_arg[i];
+
+ OPT_ADD(fo, SOL_DCCP, DCCP_SOCKOPT_CCID, ccids, i);
+ }
+
+ fd = makesock(IPPROTO_DCCP, 0, conf->host_arg, conf->port_arg, fo);
+ free(ccids);
+ if (fd < 0)
+ return fd;
/*
* Disable unused CCIDs: the receiver does not send any application
* data to the server. By shutting down this unused path we reduce
ret = mark_fd_nonblocking(fd);
if (ret < 0)
goto err;
- rn->buf = para_calloc(DCCP_BUFSIZE);
- rn->private_data = pdd = para_calloc(sizeof(struct private_dccp_recv_data));
- pdd->fd = fd;
+ rn->btrp = btr_pool_new("dccp_recv", 320 * 1024);
+ rn->fd = fd;
return 1;
err:
close(fd);
return ret;
}
-static void dccp_shutdown(void)
+/**
+ * Check whether the host supports the requested 'ccid' arguments.
+ * \param conf DCCP receiver arguments.
+ * \return True if all CCIDs requested in \a conf are supported.
+ */
+static bool dccp_recv_ccid_support_check(struct dccp_recv_args_info *conf)
{
- ; /* nothing to do */
+ uint8_t *ccids;
+ int i, j, nccids;
+
+ nccids = dccp_available_ccids(&ccids);
+ if (nccids <= 0)
+ return false;
+
+ for (i = 0; i < conf->ccid_given; i++) {
+ for (j = 0; j < nccids && ccids[j] != conf->ccid_arg[i]; j++)
+ ;
+ if (j == nccids) {
+ PARA_ERROR_LOG("'CCID-%d' not supported on this host.\n",
+ conf->ccid_arg[i]);
+ return false;
+ }
+ }
+ return true;
}
static void *dccp_recv_parse_config(int argc, char **argv)
{
- struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
+ struct dccp_recv_args_info *tmp = para_calloc(sizeof(*tmp));
- if (!dccp_recv_cmdline_parser(argc, argv, tmp))
- return tmp;
- free(tmp);
- return NULL;
+ dccp_recv_cmdline_parser(argc, argv, tmp);
+ if (!dccp_recv_ccid_support_check(tmp))
+ exit(EXIT_FAILURE);
+ return tmp;
}
static void dccp_recv_pre_select(struct sched *s, struct task *t)
{
struct receiver_node *rn = container_of(t, struct receiver_node, task);
- struct private_dccp_recv_data *pdd = rn->private_data;
t->error = 0;
- para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
+ if (generic_recv_pre_select(s, t) <= 0)
+ return;
+ para_fd_set(rn->fd, &s->rfds, &s->max_fileno);
}
-static void dccp_recv_post_select(struct sched *s, struct task *t)
+static int dccp_recv_post_select(struct sched *s, struct task *t)
{
struct receiver_node *rn = container_of(t, struct receiver_node, task);
- struct private_dccp_recv_data *pdd = rn->private_data;
+ struct btr_node *btrn = rn->btrn;
+ struct iovec iov[2];
+ int ret, iovcnt;
+ size_t num_bytes;
- if (rn->output_error && *rn->output_error < 0) {
- t->error = *rn->output_error;
- return;
- }
- if (!FD_ISSET(pdd->fd, &s->rfds))
- return; /* nothing to do */
- if (rn->loaded >= DCCP_BUFSIZE) {
- t->error = -E_DCCP_OVERRUN;
- return;
- }
- t->error = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
- DCCP_BUFSIZE - rn->loaded);
- if (t->error > 0) {
- rn->loaded += t->error;
- return;
+ ret = task_get_notification(t);
+ if (ret < 0)
+ goto out;
+ ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
+ if (ret <= 0)
+ goto out;
+ iovcnt = btr_pool_get_buffers(rn->btrp, iov);
+ ret = -E_DCCP_OVERRUN;
+ if (iovcnt == 0)
+ goto out;
+ ret = readv_nonblock(rn->fd, iov, iovcnt, &s->rfds, &num_bytes);
+ if (num_bytes == 0)
+ goto out;
+ if (num_bytes <= iov[0].iov_len) /* only the first buffer was filled */
+ btr_add_output_pool(rn->btrp, num_bytes, btrn);
+ else { /* both buffers contain data */
+ btr_add_output_pool(rn->btrp, iov[0].iov_len, btrn);
+ btr_add_output_pool(rn->btrp, num_bytes - iov[0].iov_len, btrn);
}
- if (!t->error)
- t->error = -E_RECV_EOF;
+out:
+ if (ret < 0)
+ btr_remove_node(&rn->btrn);
+ return ret;
+}
+
+static void dccp_recv_free_config(void *conf)
+{
+ dccp_recv_cmdline_parser_free(conf);
+ free(conf);
}
/**
struct dccp_recv_args_info dummy;
dccp_recv_cmdline_parser_init(&dummy);
- r->shutdown = dccp_shutdown;
r->open = dccp_recv_open;
r->close = dccp_recv_close;
r->pre_select = dccp_recv_pre_select;
r->post_select = dccp_recv_post_select;
r->parse_config = dccp_recv_parse_config;
- r->help = (struct ggo_help) {
- .short_help = dccp_recv_args_info_help,
- .detailed_help = dccp_recv_args_info_detailed_help
- };
+ r->free_config = dccp_recv_free_config;
+ r->help = (struct ggo_help)DEFINE_GGO_HELP(dccp_recv);
dccp_recv_cmdline_parser_free(&dummy);
}
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