0b90fd5adf
As both C and C++ standards require applications running under an OS to
return 'int', adapt that for Zephyr to align with those standard. This also
eliminates errors when building with clang when not using -ffreestanding,
and reduces the need for compiler flags to silence warnings for both clang
and gcc.
Most of these changes were automated using coccinelle with the following
script:
@@
@@
- void
+ int
main(...) {
...
- return;
+ return 0;
...
}
Approximately 40 files had to be edited by hand as coccinelle was unable to
fix them.
Signed-off-by: Keith Packard <keithp@keithp.com>
103 lines
1.9 KiB
C
103 lines
1.9 KiB
C
/*
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* Copyright (c) 2017 Linaro Limited
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#ifndef __ZEPHYR__
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#else
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#include <zephyr/net/socket.h>
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#include <zephyr/kernel.h>
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#endif
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#define BIND_PORT 4242
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int main(void)
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{
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int serv;
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struct sockaddr_in bind_addr;
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static int counter;
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serv = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (serv < 0) {
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printf("error: socket: %d\n", errno);
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exit(1);
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}
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bind_addr.sin_family = AF_INET;
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bind_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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bind_addr.sin_port = htons(BIND_PORT);
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if (bind(serv, (struct sockaddr *)&bind_addr, sizeof(bind_addr)) < 0) {
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printf("error: bind: %d\n", errno);
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exit(1);
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}
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if (listen(serv, 5) < 0) {
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printf("error: listen: %d\n", errno);
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exit(1);
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}
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printf("Single-threaded TCP echo server waits for a connection on "
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"port %d...\n", BIND_PORT);
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while (1) {
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struct sockaddr_in client_addr;
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socklen_t client_addr_len = sizeof(client_addr);
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char addr_str[32];
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int client = accept(serv, (struct sockaddr *)&client_addr,
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&client_addr_len);
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if (client < 0) {
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printf("error: accept: %d\n", errno);
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continue;
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}
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inet_ntop(client_addr.sin_family, &client_addr.sin_addr,
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addr_str, sizeof(addr_str));
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printf("Connection #%d from %s\n", counter++, addr_str);
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while (1) {
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char buf[128], *p;
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int len = recv(client, buf, sizeof(buf), 0);
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int out_len;
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if (len <= 0) {
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if (len < 0) {
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printf("error: recv: %d\n", errno);
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}
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break;
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}
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p = buf;
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do {
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out_len = send(client, p, len, 0);
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if (out_len < 0) {
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printf("error: send: %d\n", errno);
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goto error;
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}
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p += out_len;
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len -= out_len;
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} while (len);
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}
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error:
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close(client);
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printf("Connection from %s closed\n", addr_str);
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}
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return 0;
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}
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