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/* SPDX-License-Identifier: MIT */
/*
* Check that recv on an empty socket will bubble back -EAGAIN if
* MSG_DONTWAIT is set, regardless of whether or not O_NONBLOCK is set
* on the socket itself.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "liburing.h"
#include "helpers.h"
static int test(int o_nonblock, int msg_dontwait)
{
int p_fd[2], ret, flags, recv_s0, val;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct sockaddr_in addr;
struct io_uring ring;
char recv_buff[128];
recv_s0 = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);
val = 1;
ret = setsockopt(recv_s0, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val));
assert(ret != -1);
ret = setsockopt(recv_s0, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
assert(ret != -1);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
ret = t_bind_ephemeral_port(recv_s0, &addr);
assert(!ret);
ret = listen(recv_s0, 128);
assert(ret != -1);
p_fd[1] = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);
val = 1;
ret = setsockopt(p_fd[1], IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
assert(ret != -1);
t_set_nonblock(p_fd[1]);
ret = connect(p_fd[1], (struct sockaddr *) &addr, sizeof(addr));
assert(ret == -1);
p_fd[0] = accept(recv_s0, NULL, NULL);
assert(p_fd[0] != -1);
if (o_nonblock)
t_set_nonblock(p_fd[0]);
while (1) {
int32_t code;
socklen_t code_len = sizeof(code);
ret = getsockopt(p_fd[1], SOL_SOCKET, SO_ERROR, &code, &code_len);
assert(ret != -1);
if (!code)
break;
}
ret = io_uring_queue_init(32, &ring, 0);
assert(ret >= 0);
flags = msg_dontwait ? MSG_DONTWAIT : 0;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_recv(sqe, p_fd[0], recv_buff, sizeof(recv_buff), flags);
sqe->user_data = 1;
io_uring_submit(&ring);
ret = io_uring_peek_cqe(&ring, &cqe);
if (ret) {
if (ret != -EAGAIN) {
fprintf(stderr, "bad peek: %d\n", ret);
goto err;
}
if (msg_dontwait) {
fprintf(stderr, "Got -EAGAIN without MSG_DONTWAIT\n");
goto err;
}
} else {
if (!msg_dontwait) {
fprintf(stderr, "Unexpected completion\n");
goto err;
}
}
io_uring_queue_exit(&ring);
close(p_fd[0]);
close(p_fd[1]);
close(recv_s0);
return T_EXIT_PASS;
err:
io_uring_queue_exit(&ring);
close(p_fd[0]);
close(p_fd[1]);
close(recv_s0);
return T_EXIT_FAIL;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = test(0, 0);
if (ret) {
fprintf(stderr, "test 0 0 failed\n");
return T_EXIT_FAIL;
}
ret = test(0, 1);
if (ret) {
fprintf(stderr, "test 0 1 failed\n");
return T_EXIT_FAIL;
}
ret = test(1, 0);
if (ret) {
fprintf(stderr, "test 1 0 failed\n");
return T_EXIT_FAIL;
}
ret = test(1, 1);
if (ret) {
fprintf(stderr, "test 1 1 failed\n");
return T_EXIT_FAIL;
}
return T_EXIT_PASS;
}
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