214 lines
6.6 KiB
C
214 lines
6.6 KiB
C
/*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* clatd_microbenchmark.c - micro-benchmark for clatd tun send path
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*
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* Run with:
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*
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* adb push {$ANDROID_PRODUCT_OUT,}/data/nativetest/clatd_microbenchmark/clatd_microbenchmark
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* adb shell /data/nativetest/clatd_microbenchmark/clatd_microbenchmark
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*
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/udp.h>
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#include <arpa/inet.h>
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#include <linux/if.h>
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#include <linux/if_tun.h>
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#include "checksum.h"
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#include "tun.h"
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#define DEVICENAME "clat4"
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#define PORT 51339
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#define PAYLOADSIZE (1280 - sizeof(struct iphdr) - sizeof(struct udphdr))
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#define NUMPACKETS 1000000
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#define SEC_TO_NANOSEC (1000 * 1000 * 1000)
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void init_sockaddr_in(struct sockaddr_in *sin, const char *addr) {
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sin->sin_family = AF_INET;
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sin->sin_port = 0;
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sin->sin_addr.s_addr = inet_addr(addr);
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}
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void die(const char *str) {
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perror(str);
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exit(1);
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}
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int setup_tun() {
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int fd = tun_open();
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if (fd == -1) die("tun_open");
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char dev[IFNAMSIZ] = DEVICENAME;
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int ret = tun_alloc(dev, fd);
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if (ret == -1) die("tun_alloc");
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struct ifreq ifr = {
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.ifr_name = DEVICENAME,
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};
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int s = socket(AF_INET, SOCK_DGRAM, 0);
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init_sockaddr_in((struct sockaddr_in *) &ifr.ifr_addr, "192.0.0.4");
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if (ioctl(s, SIOCSIFADDR, &ifr) < 0) die("SIOCSIFADDR");
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init_sockaddr_in((struct sockaddr_in *) &ifr.ifr_addr, "255.255.255.248");
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if (ioctl(s, SIOCSIFNETMASK, &ifr) < 0) die("SIOCSIFNETMASK");
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if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) die("SIOCGIFFLAGS");
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ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
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if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) die("SIOCSIFFLAGS");
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return fd;
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}
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int send_packet(int fd, uint8_t payload[], int len, uint32_t payload_checksum) {
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struct tun_pi tun = { 0, htons(ETH_P_IP) };
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struct udphdr udp = {
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.source = htons(1234),
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.dest = htons(PORT),
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.len = htons(len + sizeof(udp)),
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.check = 0,
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};
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struct iphdr ip = {
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.version = 4,
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.ihl = 5,
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.tot_len = htons(len + sizeof(ip) + sizeof(udp)),
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.frag_off = htons(IP_DF),
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.ttl = 55,
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.protocol = IPPROTO_UDP,
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.saddr = htonl(0xc0000006), // 192.0.0.6
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.daddr = htonl(0xc0000004), // 192.0.0.4
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};
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clat_packet out = {
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{ &tun, sizeof(tun) }, // tun header
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{ &ip, sizeof(ip) }, // IP header
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{ NULL, 0 }, // Fragment header
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{ &udp, sizeof(udp) }, // Transport header
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{ NULL, 0 }, // ICMP error IP header
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{ NULL, 0 }, // ICMP error fragment header
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{ NULL, 0 }, // ICMP error transport header
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{ payload, len }, // Payload
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};
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ip.check = ip_checksum(&ip, sizeof(ip));
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uint32_t sum;
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sum = ipv4_pseudo_header_checksum(&ip, ntohs(udp.len));
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sum = ip_checksum_add(sum, &udp, sizeof(udp));
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sum += payload_checksum;
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udp.check = ip_checksum_finish(sum);
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return send_tun(fd, out, sizeof(out) / sizeof(out[0]));
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}
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double timedelta(const struct timespec tv1, const struct timespec tv2) {
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struct timespec end = tv2;
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if (end.tv_nsec < tv1.tv_nsec) {
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end.tv_sec -= 1;
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end.tv_nsec += SEC_TO_NANOSEC;
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}
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double seconds = (end.tv_sec - tv1.tv_sec);
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seconds += (((double) (end.tv_nsec - tv1.tv_nsec)) / SEC_TO_NANOSEC);
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return seconds;
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}
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void benchmark(const char *name, int fd, int s, int num, int do_read,
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uint8_t payload[], int len, uint32_t payload_sum) {
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int i;
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char buf[4096];
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struct timespec tv1, tv2;
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int write_err = 0, read_err = 0;
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clock_gettime(CLOCK_MONOTONIC, &tv1);
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for (i = 0; i < num; i++) {
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if (send_packet(fd, payload, len, payload_sum) == -1) write_err++;
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if (do_read && recvfrom(s, buf, sizeof(buf), 0, NULL, NULL) == -1) {
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read_err++;
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if (errno == ETIMEDOUT) {
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printf("Timed out after %d packets!\n", i);
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break;
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}
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}
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}
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clock_gettime(CLOCK_MONOTONIC, &tv2);
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double seconds = timedelta(tv1, tv2);
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int pps = (int) (i / seconds);
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double mbps = (i * PAYLOADSIZE / 1000000 * 8 / seconds);
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printf("%s: %d packets in %.2fs (%d pps, %.2f Mbps), ", name, i, seconds, pps, mbps);
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printf("read err %d (%.2f%%), write err %d (%.2f%%)\n",
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read_err, (float) read_err / i * 100,
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write_err, (float) write_err / i * 100);
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}
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int open_socket() {
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int sock = socket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, IPPROTO_UDP);
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int on = 1;
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if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) die("SO_REUSEADDR");
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struct timeval tv = { 1, 0 };
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if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) die("SO_RCVTIMEO");
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struct sockaddr_in addr = {
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.sin_family = AF_INET,
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.sin_port = ntohs(PORT),
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.sin_addr = { INADDR_ANY }
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};
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if (bind(sock, (struct sockaddr *) &addr, sizeof(addr)) == -1) die ("bind");
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return sock;
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}
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int main() {
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int fd = setup_tun();
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int sock = open_socket();
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int i;
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uint8_t payload[PAYLOADSIZE];
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for (i = 0; i < (int) sizeof(payload); i++) {
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payload[i] = (uint8_t) i;
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}
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uint32_t payload_sum = ip_checksum_add(0, payload, sizeof(payload));
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// Check things are working.
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char buf[4096];
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if (send_packet(fd, payload, sizeof(payload), payload_sum) == -1) die("send_packet");
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if (recvfrom(sock, buf, sizeof(buf), 0, NULL, NULL) == -1) die("recvfrom");
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benchmark("Blocking", fd, sock, NUMPACKETS, 1, payload, sizeof(payload), payload_sum);
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close(fd);
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fd = setup_tun();
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set_nonblocking(fd);
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benchmark("No read", fd, sock, NUMPACKETS, 0, payload, sizeof(payload), payload_sum);
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close(fd);
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fd = setup_tun();
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set_nonblocking(fd);
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benchmark("Nonblocking", fd, sock, NUMPACKETS, 1, payload, sizeof(payload), payload_sum);
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close(fd);
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return 0;
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}
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