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flow.c
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flow.c
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/*
* Copyright 2016 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "flow.h"
#include "common.h"
#include "interval.h"
#include "lib.h"
#include "logging.h"
#include "numlist.h"
void epoll_add_or_die(int epollfd, int fd, uint32_t events, struct callbacks *cb)
{
struct epoll_event ev;
struct flow *flow;
flow = calloc(1, sizeof(struct flow));
flow->fd = fd;
ev.events = events;
ev.data.ptr = flow;
epoll_ctl_or_die(epollfd, EPOLL_CTL_ADD, fd, &ev, cb);
}
#ifndef SO_MAX_PACING_RATE
#define SO_MAX_PACING_RATE 47
#endif
struct flow *addflow(int tid, int epfd, int fd, int flow_id, uint32_t events,
struct options *opts, struct callbacks *cb)
{
struct epoll_event ev;
struct flow *flow;
if (opts->debug)
set_debug(fd, 1, cb);
if (opts->max_pacing_rate) {
uint32_t m = opts->max_pacing_rate;
setsockopt(fd, SOL_SOCKET, SO_MAX_PACING_RATE, &m, sizeof(m));
}
set_nonblocking(fd, cb);
if (opts->reuseaddr)
set_reuseaddr(fd, 1, cb);
flow = calloc(1, sizeof(struct flow));
flow->fd = fd;
flow->id = flow_id;
flow->latency = numlist_create(cb);
ev.events = EPOLLRDHUP | events;
ev.data.ptr = flow;
epoll_ctl_or_die(epfd, EPOLL_CTL_ADD, fd, &ev, cb);
NP_LOG_INFO(cb, "tid=%d, flow_id=%d", tid, flow->id);
return flow;
}
void delflow(int tid, int epfd, struct flow *flow, struct callbacks *cb)
{
interval_destroy(flow->itv);
epoll_del_or_err(epfd, flow->fd, cb);
do_close(flow->fd);
NP_LOG_INFO(cb, "tid=%d, flow_id=%d", tid, flow->id);
free(flow);
}
struct flow *addflow_udp(int tid, int epfd, int fd, int flow_id, uint32_t events,
struct options *opts, struct callbacks *cb)
{
struct epoll_event ev;
struct flow *flow;
if (opts->debug)
set_debug(fd, 1, cb);
set_nonblocking(fd, cb);
if (opts->reuseaddr)
set_reuseaddr(fd, 1, cb);
flow = calloc(1, sizeof(struct flow));
flow->fd = fd;
flow->id = flow_id;
flow->latency = numlist_create(cb);
ev.events = events;
ev.data.ptr = flow;
epoll_ctl_or_die(epfd, EPOLL_CTL_ADD, fd, &ev, cb);
NP_LOG_INFO(cb, "tid=%d, flow_id=%d", tid, flow->id);
return flow;
}