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/*
* Simple test case showing using send and recv through io_uring
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <pthread.h>
#include "liburing.h"
static char str[] = "This is a test of send and recv over io_uring!";
#define MAX_MSG 128
#define PORT 10200
#define HOST "127.0.0.1"
#if 0
# define io_uring_prep_send io_uring_prep_write
# define io_uring_prep_recv io_uring_prep_read
#endif
static int recv_prep(struct io_uring *ring, struct iovec *iov)
{
struct sockaddr_in saddr;
struct io_uring_sqe *sqe;
int sockfd, ret;
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
saddr.sin_port = htons(PORT);
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0) {
perror("socket");
return 1;
}
ret = bind(sockfd, (struct sockaddr *)&saddr, sizeof(saddr));
if (ret < 0) {
perror("bind");
goto err;
}
sqe = io_uring_get_sqe(ring);
io_uring_prep_recv(sqe, sockfd, iov->iov_base, iov->iov_len, 0);
sqe->user_data = 2;
ret = io_uring_submit(ring);
if (ret <= 0) {
fprintf(stderr, "submit failed: %d\n", ret);
goto err;
}
return 0;
err:
close(sockfd);
return 1;
}
static int do_recv(struct io_uring *ring, struct iovec *iov)
{
struct io_uring_cqe *cqe;
io_uring_wait_cqe(ring, &cqe);
if (cqe->res < 0) {
fprintf(stderr, "failed cqe: %d\n", cqe->res);
goto err;
}
if (cqe->res -1 != strlen(str)) {
fprintf(stderr, "got wrong length: %d/%d\n", cqe->res,
(int) strlen(str) + 1);
goto err;
}
if (strcmp(str, iov->iov_base)) {
fprintf(stderr, "string mismatch\n");
goto err;
}
return 0;
err:
return 1;
}
static void *recv_fn(void *data)
{
pthread_mutex_t *mutex = data;
char buf[MAX_MSG + 1];
struct iovec iov = {
.iov_base = buf,
.iov_len = sizeof(buf) - 1,
};
struct io_uring ring;
int ret;
io_uring_queue_init(1, &ring, 0);
recv_prep(&ring, &iov);
pthread_mutex_unlock(mutex);
ret = do_recv(&ring, &iov);
io_uring_queue_exit(&ring);
return (void *)(intptr_t)ret;
}
static int do_send(void)
{
struct sockaddr_in saddr;
struct iovec iov = {
.iov_base = str,
.iov_len = sizeof(str),
};
struct io_uring ring;
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
int sockfd, ret;
ret = io_uring_queue_init(1, &ring, 0);
if (ret) {
fprintf(stderr, "queue init fail: %d\n", ret);
return 1;
}
memset(&saddr, 0, sizeof(saddr));
saddr.sin_family = AF_INET;
saddr.sin_port = htons(PORT);
inet_pton(AF_INET, HOST, &saddr.sin_addr);
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0) {
perror("socket");
return 1;
}
ret = connect(sockfd, &saddr, sizeof(saddr));
if (ret < 0) {
perror("connect");
return 1;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_send(sqe, sockfd, iov.iov_base, iov.iov_len, 0);
sqe->user_data = 1;
ret = io_uring_submit(&ring);
if (ret <= 0) {
fprintf(stderr, "submit failed: %d\n", ret);
goto err;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (cqe->res != iov.iov_len) {
fprintf(stderr, "failed cqe: %d\n", cqe->res);
goto err;
}
close(sockfd);
return 0;
err:
close(sockfd);
return 1;
}
int main(int argc, char *argv[])
{
pthread_mutexattr_t attr;
pthread_t recv_thread;
pthread_mutex_t mutex;
int ret;
void *retval;
pthread_mutexattr_init(&attr);
pthread_mutexattr_setpshared(&attr, 1);
pthread_mutex_init(&mutex, &attr);
pthread_mutex_lock(&mutex);
ret = pthread_create(&recv_thread, NULL, recv_fn, &mutex);
if (ret) {
fprintf(stderr, "Thread create failed: %d\n", ret);
return 1;
}
pthread_mutex_lock(&mutex);
do_send();
pthread_join(recv_thread, &retval);
ret = (int)(intptr_t)retval;
return ret;
}
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