133 lines
3.3 KiB
C++
133 lines
3.3 KiB
C++
/*
|
|
* \brief Minimal HTTP server lwIP demonstration
|
|
* \author lwIP Team
|
|
* \author Stefan Kalkowski
|
|
* \author Martin Stein
|
|
* \date 2009-10-23
|
|
*
|
|
* This small example shows how to use the LwIP in Genode directly.
|
|
* If you simply want to use LwIP's socket API, you might use
|
|
* Genode's libc together with its LwIP backend, especially useful
|
|
* when porting legacy code.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2009-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/attached_rom_dataspace.h>
|
|
#include <base/log.h>
|
|
#include <libc/component.h>
|
|
#include <nic/packet_allocator.h>
|
|
#include <util/string.h>
|
|
|
|
/* Libc includes */
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
|
|
using namespace Genode;
|
|
|
|
const static char http_html_hdr[] =
|
|
"HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"; /* HTTP response header */
|
|
|
|
const static char http_index_html[] =
|
|
"<html><head><title>Congrats!</title></head><body><h1>Welcome to our lwIP HTTP server!</h1><p>This is a small test page.</body></html>"; /* HTML page */
|
|
|
|
|
|
/**
|
|
* Handle a single client's request.
|
|
*
|
|
* \param conn socket connected to the client
|
|
*/
|
|
void http_server_serve(int conn)
|
|
{
|
|
char buf[1024];
|
|
ssize_t buflen;
|
|
|
|
/* Read the data from the port, blocking if nothing yet there.
|
|
We assume the request (the part we care about) is in one packet */
|
|
buflen = recv(conn, buf, 1024, 0);
|
|
Genode::log("Packet received!");
|
|
|
|
/* Ignore all receive errors */
|
|
if (buflen > 0) {
|
|
|
|
/* Is this an HTTP GET command? (only check the first 5 chars, since
|
|
there are other formats for GET, and we're keeping it very simple)*/
|
|
if (buflen >= 5 &&
|
|
buf[0] == 'G' &&
|
|
buf[1] == 'E' &&
|
|
buf[2] == 'T' &&
|
|
buf[3] == ' ' &&
|
|
buf[4] == '/' ) {
|
|
|
|
Genode::log("Will send response");
|
|
|
|
/* Send http header */
|
|
send(conn, http_html_hdr, Genode::strlen(http_html_hdr), 0);
|
|
|
|
/* Send our HTML page */
|
|
send(conn, http_index_html, Genode::strlen(http_index_html), 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void test(Libc::Env &env)
|
|
{
|
|
Attached_rom_dataspace config(env, "config");
|
|
uint16_t const port = config.xml().attribute_value("port", (uint16_t)80);
|
|
|
|
Genode::log("Create new socket ...");
|
|
int s;
|
|
if((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
error("no socket available!");
|
|
env.parent().exit(-1);
|
|
}
|
|
|
|
Genode::log("Now, I will bind ...");
|
|
struct sockaddr_in in_addr;
|
|
in_addr.sin_family = AF_INET;
|
|
in_addr.sin_port = htons(port);
|
|
in_addr.sin_addr.s_addr = INADDR_ANY;
|
|
if (bind(s, (struct sockaddr*)&in_addr, sizeof(in_addr))) {
|
|
Genode::error("bind failed!");
|
|
env.parent().exit(-1);
|
|
}
|
|
|
|
Genode::log("Now, I will listen ...");
|
|
if (listen(s, 5)) {
|
|
Genode::error("listen failed!");
|
|
env.parent().exit(-1);
|
|
}
|
|
|
|
Genode::log("Start the server loop ...");
|
|
while (true) {
|
|
struct sockaddr addr;
|
|
socklen_t len = sizeof(addr);
|
|
int client = accept(s, &addr, &len);
|
|
if(client < 0) {
|
|
Genode::warning("invalid socket from accept!");
|
|
continue;
|
|
}
|
|
http_server_serve(client);
|
|
close(client);
|
|
}
|
|
env.parent().exit(0);
|
|
}
|
|
|
|
|
|
void Libc::Component::construct(Libc::Env &env) { with_libc([&] () { test(env); }); }
|