-/*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file dccp_recv.c paraslash's dccp receiver */
* (C) 2005 Ian McDonald <imcdnzl@gmail.com>
*/
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <regex.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+#include <sys/un.h>
+#include <netdb.h>
+#include <lopsub.h>
+
+#include "recv_cmd.lsg.h"
#include "para.h"
#include "error.h"
-#include "dccp.h"
#include "list.h"
#include "sched.h"
+#include "buffer_tree.h"
#include "recv.h"
#include "string.h"
#include "net.h"
#include "fd.h"
-#include "dccp_recv.cmdline.h"
-
-/* needed by getaddrinfo */
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.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)
{
+ if (rn->fd > 0)
+ close(rn->fd);
+ btr_pool_free(rn->btrp);
+}
- struct private_dccp_recv_data *pdd = rn->private_data;
+/* Check whether the host supports the requested 'ccid' arguments. */
+static int dccp_recv_ccid_support_check(const struct lls_parse_result *lpr)
+{
+ uint8_t *ccids;
+ int i, j, ret, nccids;
+ unsigned given = RECV_CMD_OPT_GIVEN(DCCP, CCID, lpr);
- if (pdd && pdd->fd > 0)
- close(pdd->fd);
- free(rn->buf);
- rn->buf = NULL;
- free(rn->private_data);
- rn->private_data = NULL;
+ ret = dccp_available_ccids(&ccids);
+ if (ret < 0)
+ return ret;
+ nccids = ret;
+ for (i = 0; i < given; i++) {
+ uint32_t val = lls_uint32_val(i,
+ RECV_CMD_OPT_RESULT(DCCP, CCID, lpr));
+ for (j = 0; j < nccids && ccids[j] != val; j++)
+ ;
+ if (j == nccids) {
+ PARA_ERROR_LOG("'CCID-%u' not supported on this host\n",
+ val);
+ return -ERRNO_TO_PARA_ERROR(EINVAL);
+ }
+ }
+ return 1;
}
-
static int dccp_recv_open(struct receiver_node *rn)
{
- struct private_dccp_recv_data *pdd;
- struct dccp_recv_args_info *conf = rn->conf;
- int ret;
- struct addrinfo *ai;
- char *tmp;
-
- rn->buf = para_calloc(DCCP_BUFSIZE);
- rn->private_data = para_calloc(sizeof(struct private_dccp_recv_data));
- pdd = rn->private_data;
- ret = dccp_get_socket();
+ struct lls_parse_result *lpr = rn->lpr;
+ struct flowopts *fo = NULL;
+ uint8_t *ccids = NULL;
+ int fd, ret, i;
+ const struct lls_opt_result *r_c = RECV_CMD_OPT_RESULT(DCCP, CCID, lpr);
+ const char *host = RECV_CMD_OPT_STRING_VAL(DCCP, HOST, lpr);
+ uint32_t port = RECV_CMD_OPT_UINT32_VAL(DCCP, PORT, lpr);
+ unsigned given;
+
+ ret = dccp_recv_ccid_support_check(lpr);
if (ret < 0)
- goto err_out;
- pdd->fd = ret;
+ return ret;
+ /* Copy CCID preference list (u8 array required) */
+ given = lls_opt_given(r_c);
+ if (given) {
+ ccids = para_malloc(given);
+ fo = flowopt_new();
+ for (i = 0; i < given; i++)
+ ccids[i] = lls_int32_val(i, r_c);
+ OPT_ADD(fo, SOL_DCCP, DCCP_SOCKOPT_CCID, ccids, i);
+ }
- tmp = make_message("%d", conf->port_arg);
- ret = getaddrinfo(conf->host_arg, tmp, NULL, &ai);
- free(tmp);
- if (ret) {
- ret = -E_ADDR_INFO;
- goto err_out;
+ fd = makesock(IPPROTO_DCCP, 0, host, port, fo);
+ flowopt_cleanup(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
+ * internal processing costs, as the unused CCIDs (in the kernel) are
+ * then bypassed.
+ */
+ if (shutdown(fd, SHUT_WR) < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ goto err;
}
- ret = dccp_set_socket(pdd->fd);
+ ret = mark_fd_nonblocking(fd);
if (ret < 0)
- goto err_out;
- PARA_NOTICE_LOG("connecting to %s:%d\n", conf->host_arg, conf->port_arg);
- ret = connect(pdd->fd, ai->ai_addr, ai->ai_addrlen);
- freeaddrinfo(ai);
- if (ret < 0) {
- ret = -E_DCCP_CONNECT;
- goto err_out;
- }
- mark_fd_nonblock(pdd->fd);
+ goto err;
+ rn->btrp = btr_pool_new("dccp_recv", 320 * 1024);
+ rn->fd = fd;
return 1;
-err_out:
- dccp_recv_close(rn);
+err:
+ close(fd);
return ret;
}
-static void dccp_shutdown(void)
-{
- ; /* nothing to do */
-}
-
-static void *dccp_recv_parse_config(int argc, char **argv)
-{
- struct dccp_recv_args_info *tmp = para_calloc(sizeof(struct dccp_recv_args_info));
-
- if (!dccp_recv_cmdline_parser(argc, argv, tmp))
- return tmp;
- free(tmp);
- return NULL;
-}
-
-static void dccp_recv_pre_select(struct sched *s, struct task *t)
+static void dccp_recv_pre_select(struct sched *s, void *context)
{
- struct receiver_node *rn = t->private_data;
- struct private_dccp_recv_data *pdd = rn->private_data;
+ struct receiver_node *rn = context;
- t->ret = 1;
- para_fd_set(pdd->fd, &s->rfds, &s->max_fileno);
+ if (generic_recv_pre_select(s, rn) <= 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, void *context)
{
- struct receiver_node *rn = t->private_data;
- struct private_dccp_recv_data *pdd = rn->private_data;
+ struct receiver_node *rn = context;
+ struct btr_node *btrn = rn->btrn;
+ struct iovec iov[2];
+ int ret, iovcnt;
+ size_t num_bytes;
- t->ret = -E_DCCP_RECV_EOF;
- if (rn->output_eof && *rn->output_eof)
+ ret = task_get_notification(rn->task);
+ if (ret < 0)
goto out;
- t->ret = 1;
- if (!s->select_ret || !FD_ISSET(pdd->fd, &s->rfds))
- goto out; /* nothing to do */
- t->ret = -E_DCCP_OVERRUN;
- if (rn->loaded >= DCCP_BUFSIZE)
+ ret = btr_node_status(btrn, 0, BTR_NT_ROOT);
+ if (ret <= 0)
goto out;
- t->ret = recv_bin_buffer(pdd->fd, rn->buf + rn->loaded,
- DCCP_BUFSIZE - rn->loaded);
- if (t->ret <= 0) {
- if (!t->ret)
- t->ret = -E_DCCP_RECV_EOF;
+ 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);
}
- rn->loaded += t->ret;
- return;
out:
- if (t->ret < 0)
- rn->eof = 1;
+ if (ret < 0)
+ btr_remove_node(&rn->btrn);
+ return ret;
}
-/**
- * the init function of the dccp receiver
- *
- * \param r pointer to the receiver struct to initialize
- *
- * Initialize all function pointers of \a r
- */
-void dccp_recv_init(struct receiver *r)
-{
- 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;
-}
+const struct receiver lsg_recv_cmd_com_dccp_user_data = {
+ .open = dccp_recv_open,
+ .close = dccp_recv_close,
+ .pre_select = dccp_recv_pre_select,
+ .post_select = dccp_recv_post_select,
+};
projects / paraslash.git / blobdiff