131 lines
3.1 KiB
C++
131 lines
3.1 KiB
C++
/*
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* \brief Minimal HTTP server lwIP demonstration
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* \author lwIP Team
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* \author Stefan Kalkowski
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* \date 2009-10-23
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*
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* This small example shows how to use the LwIP in Genode directly.
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* If you simply want to use LwIP's socket API, you might use
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* Genode's libc together with its LwIP backend, especially useful
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* when porting legacy code.
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*/
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/*
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* Copyright (C) 2009-2012 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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#include <base/thread.h>
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#include <util/string.h>
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#include <nic/packet_allocator.h>
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/* LwIP includes */
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extern "C" {
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#include <lwip/sockets.h>
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#include <lwip/api.h>
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}
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#include <lwip/genode.h>
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const static char http_html_hdr[] =
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"HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"; /* HTTP response header */
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const static char http_index_html[] =
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"<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 */
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/**
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* Handle a single client's request.
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*
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* \param conn socket connected to the client
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*/
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void http_server_serve(int conn) {
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char buf[1024];
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ssize_t buflen;
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/* Read the data from the port, blocking if nothing yet there.
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We assume the request (the part we care about) is in one packet */
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buflen = lwip_recv(conn, buf, 1024, 0);
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PLOG("Packet received!");
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/* Ignore all receive errors */
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if (buflen > 0) {
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/* Is this an HTTP GET command? (only check the first 5 chars, since
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there are other formats for GET, and we're keeping it very simple)*/
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if (buflen >= 5 &&
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buf[0] == 'G' &&
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buf[1] == 'E' &&
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buf[2] == 'T' &&
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buf[3] == ' ' &&
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buf[4] == '/' ) {
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PLOG("Will send response");
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/* Send http header */
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lwip_send(conn, http_html_hdr, Genode::strlen(http_html_hdr), 0);
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/* Send our HTML page */
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lwip_send(conn, http_index_html, Genode::strlen(http_index_html), 0);
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}
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}
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}
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int main()
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{
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enum { BUF_SIZE = Nic::Packet_allocator::DEFAULT_PACKET_SIZE * 128 };
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int s;
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lwip_tcpip_init();
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/* Initialize network stack */
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if (lwip_nic_init(inet_addr("10.0.2.55"), inet_addr("255.255.255.0"),
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inet_addr("10.0.2.1"), BUF_SIZE, BUF_SIZE)) {
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PERR("We got no IP address!");
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return -1;
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}
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PLOG("Create new socket ...");
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if((s = lwip_socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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PERR("No socket available!");
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return -1;
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}
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PLOG("Now, I will bind ...");
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struct sockaddr_in in_addr;
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in_addr.sin_family = AF_INET;
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in_addr.sin_port = htons(80);
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in_addr.sin_addr.s_addr = INADDR_ANY;
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if(lwip_bind(s, (struct sockaddr*)&in_addr, sizeof(in_addr))) {
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PERR("bind failed!");
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return -1;
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}
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PLOG("Now, I will listen ...");
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if(lwip_listen(s, 5)) {
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PERR("listen failed!");
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return -1;
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}
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PLOG("Start the server loop ...");
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while(true) {
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struct sockaddr addr;
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socklen_t len = sizeof(addr);
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int client = lwip_accept(s, &addr, &len);
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if(client < 0) {
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PWRN("Invalid socket from accept!");
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continue;
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}
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http_server_serve(client);
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lwip_close(client);
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}
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return 0;
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}
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