| /* |
| * Copyright 2014 The Android Open Source Project |
| * |
| * 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. |
| * |
| * clatd_microbenchmark.c - micro-benchmark for clatd tun send path |
| * |
| * Run with: |
| * |
| * adb push {$ANDROID_PRODUCT_OUT,}/data/nativetest/clatd_microbenchmark/clatd_microbenchmark |
| * adb shell /data/nativetest/clatd_microbenchmark/clatd_microbenchmark |
| * |
| */ |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <sys/ioctl.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/uio.h> |
| #include <netinet/in.h> |
| #include <netinet/ip.h> |
| #include <netinet/ip6.h> |
| #include <netinet/udp.h> |
| #include <arpa/inet.h> |
| #include <linux/if.h> |
| #include <linux/if_tun.h> |
| |
| #include "checksum.h" |
| #include "tun.h" |
| |
| #define DEVICENAME "clat4" |
| |
| #define PORT 51339 |
| #define PAYLOADSIZE (1280 - sizeof(struct iphdr) - sizeof(struct udphdr)) |
| #define NUMPACKETS 1000000 |
| #define SEC_TO_NANOSEC (1000 * 1000 * 1000) |
| |
| void init_sockaddr_in(struct sockaddr_in *sin, const char *addr) { |
| sin->sin_family = AF_INET; |
| sin->sin_port = 0; |
| sin->sin_addr.s_addr = inet_addr(addr); |
| } |
| |
| void die(const char *str) { |
| perror(str); |
| exit(1); |
| } |
| |
| int setup_tun() { |
| int fd = tun_open(); |
| if (fd == -1) die("tun_open"); |
| |
| char dev[IFNAMSIZ] = DEVICENAME; |
| int ret = tun_alloc(dev, fd); |
| if (ret == -1) die("tun_alloc"); |
| struct ifreq ifr = { |
| .ifr_name = DEVICENAME, |
| }; |
| |
| int s = socket(AF_INET, SOCK_DGRAM, 0); |
| init_sockaddr_in((struct sockaddr_in *) &ifr.ifr_addr, "192.0.0.4"); |
| if (ioctl(s, SIOCSIFADDR, &ifr) < 0) die("SIOCSIFADDR"); |
| init_sockaddr_in((struct sockaddr_in *) &ifr.ifr_addr, "255.255.255.248"); |
| if (ioctl(s, SIOCSIFNETMASK, &ifr) < 0) die("SIOCSIFNETMASK"); |
| if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) die("SIOCGIFFLAGS"); |
| ifr.ifr_flags |= (IFF_UP | IFF_RUNNING); |
| if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) die("SIOCSIFFLAGS"); |
| return fd; |
| } |
| |
| int send_packet(int fd, uint8_t payload[], int len, uint32_t payload_checksum) { |
| struct tun_pi tun = { 0, htons(ETH_P_IP) }; |
| struct udphdr udp = { |
| .source = htons(1234), |
| .dest = htons(PORT), |
| .len = htons(len + sizeof(udp)), |
| .check = 0, |
| }; |
| struct iphdr ip = { |
| .version = 4, |
| .ihl = 5, |
| .tot_len = htons(len + sizeof(ip) + sizeof(udp)), |
| .frag_off = htons(IP_DF), |
| .ttl = 55, |
| .protocol = IPPROTO_UDP, |
| .saddr = htonl(0xc0000006), // 192.0.0.6 |
| .daddr = htonl(0xc0000004), // 192.0.0.4 |
| }; |
| clat_packet out = { |
| { &tun, sizeof(tun) }, // tun header |
| { &ip, sizeof(ip) }, // IP header |
| { NULL, 0 }, // Fragment header |
| { &udp, sizeof(udp) }, // Transport header |
| { NULL, 0 }, // ICMP error IP header |
| { NULL, 0 }, // ICMP error fragment header |
| { NULL, 0 }, // ICMP error transport header |
| { payload, len }, // Payload |
| }; |
| |
| ip.check = ip_checksum(&ip, sizeof(ip)); |
| |
| uint32_t sum; |
| sum = ipv4_pseudo_header_checksum(&ip, ntohs(udp.len)); |
| sum = ip_checksum_add(sum, &udp, sizeof(udp)); |
| sum += payload_checksum; |
| udp.check = ip_checksum_finish(sum); |
| |
| return send_tun(fd, out, sizeof(out) / sizeof(out[0])); |
| } |
| |
| double timedelta(const struct timespec tv1, const struct timespec tv2) { |
| struct timespec end = tv2; |
| if (end.tv_nsec < tv1.tv_nsec) { |
| end.tv_sec -= 1; |
| end.tv_nsec += SEC_TO_NANOSEC; |
| } |
| double seconds = (end.tv_sec - tv1.tv_sec); |
| seconds += (((double) (end.tv_nsec - tv1.tv_nsec)) / SEC_TO_NANOSEC); |
| return seconds; |
| } |
| |
| void benchmark(const char *name, int fd, int s, int num, int do_read, |
| uint8_t payload[], int len, uint32_t payload_sum) { |
| int i; |
| char buf[4096]; |
| struct timespec tv1, tv2; |
| int write_err = 0, read_err = 0; |
| clock_gettime(CLOCK_MONOTONIC, &tv1); |
| for (i = 0; i < num; i++) { |
| if (send_packet(fd, payload, len, payload_sum) == -1) write_err++; |
| if (do_read && recvfrom(s, buf, sizeof(buf), 0, NULL, NULL) == -1) { |
| read_err++; |
| if (errno == ETIMEDOUT) { |
| printf("Timed out after %d packets!\n", i); |
| break; |
| } |
| } |
| } |
| clock_gettime(CLOCK_MONOTONIC, &tv2); |
| double seconds = timedelta(tv1, tv2); |
| int pps = (int) (i / seconds); |
| double mbps = (i * PAYLOADSIZE / 1000000 * 8 / seconds); |
| printf("%s: %d packets in %.2fs (%d pps, %.2f Mbps), ", name, i, seconds, pps, mbps); |
| printf("read err %d (%.2f%%), write err %d (%.2f%%)\n", |
| read_err, (float) read_err / i * 100, |
| write_err, (float) write_err / i * 100); |
| } |
| |
| int open_socket() { |
| int sock = socket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, IPPROTO_UDP); |
| |
| int on = 1; |
| if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) die("SO_REUSEADDR"); |
| |
| struct timeval tv = { 1, 0 }; |
| if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) == -1) die("SO_RCVTIMEO"); |
| |
| struct sockaddr_in addr = { |
| .sin_family = AF_INET, |
| .sin_port = ntohs(PORT), |
| .sin_addr = { INADDR_ANY } |
| }; |
| if (bind(sock, (struct sockaddr *) &addr, sizeof(addr)) == -1) die ("bind"); |
| |
| return sock; |
| } |
| |
| int main() { |
| int fd = setup_tun(); |
| int sock = open_socket(); |
| |
| int i; |
| uint8_t payload[PAYLOADSIZE]; |
| for (i = 0; i < (int) sizeof(payload); i++) { |
| payload[i] = (uint8_t) i; |
| } |
| uint32_t payload_sum = ip_checksum_add(0, payload, sizeof(payload)); |
| |
| // Check things are working. |
| char buf[4096]; |
| if (send_packet(fd, payload, sizeof(payload), payload_sum) == -1) die("send_packet"); |
| if (recvfrom(sock, buf, sizeof(buf), 0, NULL, NULL) == -1) die("recvfrom"); |
| |
| benchmark("Blocking", fd, sock, NUMPACKETS, 1, payload, sizeof(payload), payload_sum); |
| close(fd); |
| |
| fd = setup_tun(); |
| set_nonblocking(fd); |
| benchmark("No read", fd, sock, NUMPACKETS, 0, payload, sizeof(payload), payload_sum); |
| close(fd); |
| |
| fd = setup_tun(); |
| set_nonblocking(fd); |
| benchmark("Nonblocking", fd, sock, NUMPACKETS, 1, payload, sizeof(payload), payload_sum); |
| close(fd); |
| |
| return 0; |
| } |