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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include <arpa/inet.h>
#include <assert.h>
#include <netinet/in.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#ifdef __wasi__
#include <wasi_socket_ext.h>
#endif
static pthread_mutex_t lock = { 0 };
static pthread_cond_t cond = { 0 };
static bool server_create_failed = false;
static bool server_is_ready = false;
void *
run_as_server(void *arg)
{
int sock = -1, on = 1;
struct sockaddr_in addr = { 0 };
int addrlen = 0;
int new_sock = -1;
char *buf[] = {
"The stars shine down", "It brings us light", "Light comes down",
"To make us paths", "It watches us", "And mourns for us",
};
struct iovec iov[] = {
{ .iov_base = buf[0], .iov_len = strlen(buf[0]) + 1 },
{ .iov_base = buf[1], .iov_len = strlen(buf[1]) + 1 },
{ .iov_base = buf[2], .iov_len = strlen(buf[2]) + 1 },
{ .iov_base = buf[3], .iov_len = strlen(buf[3]) + 1 },
{ .iov_base = buf[4], .iov_len = strlen(buf[4]) + 1 },
{ .iov_base = buf[5], .iov_len = strlen(buf[5]) + 1 },
};
struct msghdr msg = { .msg_iov = iov, .msg_iovlen = 6 };
ssize_t send_len = 0;
pthread_mutex_lock(&lock);
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
server_create_failed = true;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
perror("Create a socket failed");
return NULL;
}
#ifndef __wasi__
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))) {
server_create_failed = true;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
perror("Setsockopt failed");
goto fail1;
}
#endif
/* 0.0.0.0:1234 */
addr.sin_family = AF_INET;
addr.sin_port = htons(1234);
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addrlen = sizeof(addr);
if (bind(sock, (struct sockaddr *)&addr, addrlen) < 0) {
server_create_failed = true;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
perror("Bind failed");
goto fail1;
}
if (listen(sock, 0) < 0) {
server_create_failed = true;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
perror("Listen failed");
goto fail1;
}
server_is_ready = true;
pthread_cond_signal(&cond);
pthread_mutex_unlock(&lock);
printf("Server is online ... \n");
new_sock = accept(sock, (struct sockaddr *)&addr, (socklen_t *)&addrlen);
if (new_sock < 0) {
perror("Accept failed");
goto fail1;
}
printf("Start sending. \n");
send_len = sendmsg(new_sock, &msg, 0);
if (send_len < 0) {
perror("Sendmsg failed");
goto fail2;
}
printf("Send %ld bytes successfully!\n", send_len);
fail2:
close(new_sock);
fail1:
shutdown(sock, SHUT_RD);
close(sock);
return NULL;
}
void *
run_as_client(void *arg)
{
int sock = -1;
struct sockaddr_in addr = { 0 };
/* buf of server is 106 bytes */
char buf[110] = { 0 };
struct iovec iov = { .iov_base = buf, .iov_len = sizeof(buf) };
struct msghdr msg = { .msg_iov = &iov, .msg_iovlen = 1 };
ssize_t recv_len = 0;
pthread_mutex_lock(&lock);
while (!server_create_failed && !server_is_ready) {
pthread_cond_wait(&cond, &lock);
}
pthread_mutex_unlock(&lock);
if (server_create_failed) {
return NULL;
}
printf("Client is running...\n");
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
perror("Create a socket failed");
return NULL;
}
/* 127.0.0.1:1234 */
addr.sin_family = AF_INET;
addr.sin_port = htons(1234);
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("Connect failed");
goto fail;
}
printf("Start receiving. \n");
recv_len = recvmsg(sock, &msg, 0);
if (recv_len < 0) {
perror("Recvmsg failed");
goto fail;
}
printf("Receive %ld bytes successlly!\n", recv_len);
assert(recv_len == 106);
printf("Data:\n");
char *s = msg.msg_iov->iov_base;
while (strlen(s) > 0) {
printf(" %s\n", s);
s += strlen(s) + 1;
}
fail:
shutdown(sock, SHUT_RD);
close(sock);
return NULL;
}
int
main(int argc, char *argv[])
{
pthread_t cs[2] = { 0 };
uint8_t i = 0;
int ret = EXIT_SUCCESS;
if (pthread_mutex_init(&lock, NULL)) {
perror("Initialize mutex failed");
ret = EXIT_FAILURE;
goto RETURN;
}
if (pthread_cond_init(&cond, NULL)) {
perror("Initialize condition failed");
ret = EXIT_FAILURE;
goto DESTROY_MUTEX;
}
if (pthread_create(&cs[0], NULL, run_as_server, NULL)) {
perror("Create a server thread failed");
ret = EXIT_FAILURE;
goto DESTROY_COND;
}
if (pthread_create(&cs[1], NULL, run_as_client, NULL)) {
perror("Create a client thread failed");
ret = EXIT_FAILURE;
goto DESTROY_COND;
}
for (i = 0; i < 2; i++) {
pthread_join(cs[i], NULL);
}
DESTROY_COND:
pthread_cond_destroy(&cond);
DESTROY_MUTEX:
pthread_mutex_destroy(&lock);
RETURN:
return ret;
}
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