Daniele Lacamera
Free (GPLv2) TCP/IP stack developed by TASS Belgium
Fork of
PicoTCP
by 
Daniele Lacamera
Diff: modules/pico_simple_http.c
- Revision:
- 1:cfe8984a32b4
- Parent:
- 0:d7f2341ab245
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/pico_simple_http.c Fri May 17 12:09:59 2013 +0000
@@ -0,0 +1,128 @@
+/*********************************************************************
+PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
+See LICENSE and COPYING for usage.
+
+Author: Andrei Carp <andrei.carp@tass.be>
+*********************************************************************/
+
+#include "pico_config.h"
+#include "pico_socket.h"
+#include "pico_tcp.h"
+#include "pico_ipv4.h"
+#include "pico_simple_http.h"
+
+/* The HTTP Server cannot be available without TCP support */
+#if (defined PICO_SUPPORT_HTTP) && (defined PICO_SUPPORT_IPV4) && (defined PICO_SUPPORT_TCP)
+
+#define HTTP_LISTEN_PORT 80u
+#define HTTP_BACKLOG 5u
+#define HTTP_HEADER_SIZE 256u
+
+#define HTTP_SUCCESS 0
+#define HTTP_ERROR -1
+
+static struct pico_socket * httpServer = NULL;
+static char httpResponse[] =
+"HTTP/1.0 200 OK\r\n\
+Content-Type: text/html\r\n\
+\r\n\
+<html><head>\r\n\
+<title>picoTCP Simple Http server</title>\r\n\
+</head>\r\n\
+<body>\r\n\
+<h1>Hello world from picoTCP !!</h1>\r\n\
+</body>\r\n";
+
+static void httpEventCbk(uint16_t ev, struct pico_socket *self)
+{
+ static struct pico_socket * client = NULL;
+ uint32_t peer;
+ uint16_t port;
+ int r;
+ char buffer[HTTP_HEADER_SIZE];
+
+ switch(ev)
+ {
+ case PICO_SOCK_EV_CONN :
+ if(!client)
+ client = pico_socket_accept(self, &peer, &port);
+ break;
+
+ case PICO_SOCK_EV_RD:
+ // do not check http integrity, just mark that the http header has arrived
+ // prepare to send the response
+ r = pico_socket_recvfrom(self, buffer, HTTP_HEADER_SIZE, &peer, &port);
+ if(r>0 && memcmp(buffer,"GET",3u) == 0u)
+ { // it is an http header asking for data, return data and close
+ pico_socket_write(self,httpResponse,sizeof(httpResponse));
+ pico_socket_close(self);
+ }
+ else
+ {
+ // kill the connection, invalid header
+ pico_socket_close(self);
+ }
+ break;
+
+ case PICO_SOCK_EV_ERR:
+ case PICO_SOCK_EV_CLOSE:
+ // free the used socket
+ client = NULL;
+ break;
+
+ default :
+ break;
+ }
+}
+
+int pico_startHttpServer(struct pico_ip4 * address)
+{
+
+ uint16_t localHttpPort = short_be(HTTP_LISTEN_PORT);
+
+ if(!pico_is_port_free(localHttpPort,PICO_PROTO_TCP, address, &pico_proto_ipv4))
+ {
+ pico_err = PICO_ERR_EADDRINUSE;
+ return HTTP_ERROR;
+ }
+
+ httpServer = pico_socket_open(PICO_PROTO_IPV4, PICO_PROTO_TCP, httpEventCbk);
+
+ if(!httpServer)
+ {
+ pico_err = PICO_ERR_ENOMEM;
+ return HTTP_ERROR;
+ }
+
+ // both functions set the pico_err themselves.
+ if(pico_socket_bind(httpServer,address,&localHttpPort))
+ return HTTP_ERROR;
+
+ if(pico_socket_listen(httpServer,HTTP_BACKLOG))
+ return HTTP_ERROR;
+
+ return HTTP_SUCCESS;
+}
+
+int pico_stopHttpServer(void)
+{
+ if(!httpServer)
+ {
+ pico_err = PICO_ERR_EINVAL;
+ return HTTP_ERROR;
+ }
+
+ if(pico_socket_close(httpServer))
+ {
+ // no need to set the error here, function already set it
+ httpServer = NULL;
+ return HTTP_ERROR;
+ }
+
+ httpServer = NULL;
+ return HTTP_SUCCESS;
+}
+
+#endif
+
+