Daniele Lacamera
CDC/ECM driver for mbed, based on USBDevice by mbed-official. Uses PicoTCP to access Ethernet USB device. License: GPLv2
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Daniele Lacamera
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pico_simple_http.c
00001 /********************************************************************* 00002 PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved. 00003 See LICENSE and COPYING for usage. 00004 00005 Author: Andrei Carp <andrei.carp@tass.be> 00006 *********************************************************************/ 00007 00008 #include "pico_config.h" 00009 #include "pico_socket.h" 00010 #include "pico_tcp.h" 00011 #include "pico_ipv4.h" 00012 #include "pico_simple_http.h" 00013 00014 /* The HTTP Server cannot be available without TCP support */ 00015 #if (defined PICO_SUPPORT_HTTP) && (defined PICO_SUPPORT_IPV4) && (defined PICO_SUPPORT_TCP) 00016 00017 #define HTTP_LISTEN_PORT 80u 00018 #define HTTP_BACKLOG 5u 00019 #define HTTP_HEADER_SIZE 256u 00020 00021 #define HTTP_SUCCESS 0 00022 #define HTTP_ERROR -1 00023 00024 static struct pico_socket * httpServer = NULL; 00025 static char httpResponse[] = 00026 "HTTP/1.0 200 OK\r\n\ 00027 Content-Type: text/html\r\n\ 00028 \r\n\ 00029 <html><head>\r\n\ 00030 <title>picoTCP Simple Http server</title>\r\n\ 00031 </head>\r\n\ 00032 <body>\r\n\ 00033 <h1>Hello world from picoTCP !!</h1>\r\n\ 00034 </body>\r\n"; 00035 00036 static void httpEventCbk(uint16_t ev, struct pico_socket *self) 00037 { 00038 static struct pico_socket * client = NULL; 00039 uint32_t peer; 00040 uint16_t port; 00041 int r; 00042 char buffer[HTTP_HEADER_SIZE]; 00043 00044 switch(ev) 00045 { 00046 case PICO_SOCK_EV_CONN : 00047 if(!client) 00048 client = pico_socket_accept(self, &peer, &port); 00049 break; 00050 00051 case PICO_SOCK_EV_RD: 00052 // do not check http integrity, just mark that the http header has arrived 00053 // prepare to send the response 00054 r = pico_socket_recvfrom(self, buffer, HTTP_HEADER_SIZE, &peer, &port); 00055 if(r>0 && memcmp(buffer,"GET",3u) == 0u) 00056 { // it is an http header asking for data, return data and close 00057 pico_socket_write(self,httpResponse,sizeof(httpResponse)); 00058 pico_socket_close(self); 00059 } 00060 else 00061 { 00062 // kill the connection, invalid header 00063 pico_socket_close(self); 00064 } 00065 break; 00066 00067 case PICO_SOCK_EV_ERR: 00068 case PICO_SOCK_EV_CLOSE: 00069 // free the used socket 00070 client = NULL; 00071 break; 00072 00073 default : 00074 break; 00075 } 00076 } 00077 00078 int pico_startHttpServer(struct pico_ip4 * address) 00079 { 00080 00081 uint16_t localHttpPort = short_be(HTTP_LISTEN_PORT); 00082 00083 if(!pico_is_port_free(localHttpPort,PICO_PROTO_TCP, address, &pico_proto_ipv4)) 00084 { 00085 pico_err = PICO_ERR_EADDRINUSE; 00086 return HTTP_ERROR; 00087 } 00088 00089 httpServer = pico_socket_open(PICO_PROTO_IPV4, PICO_PROTO_TCP, httpEventCbk); 00090 00091 if(!httpServer) 00092 { 00093 pico_err = PICO_ERR_ENOMEM; 00094 return HTTP_ERROR; 00095 } 00096 00097 // both functions set the pico_err themselves. 00098 if(pico_socket_bind(httpServer,address,&localHttpPort)) 00099 return HTTP_ERROR; 00100 00101 if(pico_socket_listen(httpServer,HTTP_BACKLOG)) 00102 return HTTP_ERROR; 00103 00104 return HTTP_SUCCESS; 00105 } 00106 00107 int pico_stopHttpServer(void) 00108 { 00109 if(!httpServer) 00110 { 00111 pico_err = PICO_ERR_EINVAL; 00112 return HTTP_ERROR; 00113 } 00114 00115 if(pico_socket_close(httpServer)) 00116 { 00117 // no need to set the error here, function already set it 00118 httpServer = NULL; 00119 return HTTP_ERROR; 00120 } 00121 00122 httpServer = NULL; 00123 return HTTP_SUCCESS; 00124 } 00125 00126 #endif 00127 00128
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