Ilya I
Example program with HTTPServer and sensor data streaming over TCPSockets, using Donatien Garnier's Net APIs and services code on top of LWIP. Files StreamServer.h and .cpp encapsulate streaming over TCPSockets. Broadcast is done by sendToAll(), and all incoming data is echoed back to the client. Echo code can be replaced with some remote control of the streaming interface. See main() that shows how to periodically send some data to all subscribed clients. To subscribe, a client should open a socket at <mbed_ip> port 123. I used few lines in TCL code to set up a quick sink for the data. HTTP files are served on port 80 concurrently to the streaming.
if/lwip/lwipNetTcpSocket.cpp@1:3ee499525aa5, 2010-06-14 (annotated)
- Committer:
- iva2k
- Date:
- Mon Jun 14 03:24:33 2010 +0000
- Revision:
- 1:3ee499525aa5
- Parent:
- 0:e614f7875b60
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| iva2k | 0:e614f7875b60 | 1 | |
| iva2k | 0:e614f7875b60 | 2 | /* |
| iva2k | 0:e614f7875b60 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| iva2k | 0:e614f7875b60 | 4 | |
| iva2k | 0:e614f7875b60 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| iva2k | 0:e614f7875b60 | 6 | of this software and associated documentation files (the "Software"), to deal |
| iva2k | 0:e614f7875b60 | 7 | in the Software without restriction, including without limitation the rights |
| iva2k | 0:e614f7875b60 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| iva2k | 0:e614f7875b60 | 9 | copies of the Software, and to permit persons to whom the Software is |
| iva2k | 0:e614f7875b60 | 10 | furnished to do so, subject to the following conditions: |
| iva2k | 0:e614f7875b60 | 11 | |
| iva2k | 0:e614f7875b60 | 12 | The above copyright notice and this permission notice shall be included in |
| iva2k | 0:e614f7875b60 | 13 | all copies or substantial portions of the Software. |
| iva2k | 0:e614f7875b60 | 14 | |
| iva2k | 0:e614f7875b60 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| iva2k | 0:e614f7875b60 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| iva2k | 0:e614f7875b60 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| iva2k | 0:e614f7875b60 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| iva2k | 0:e614f7875b60 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| iva2k | 0:e614f7875b60 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| iva2k | 0:e614f7875b60 | 21 | THE SOFTWARE. |
| iva2k | 0:e614f7875b60 | 22 | */ |
| iva2k | 0:e614f7875b60 | 23 | |
| iva2k | 0:e614f7875b60 | 24 | #include "lwipNetTcpSocket.h" |
| iva2k | 0:e614f7875b60 | 25 | #include "lwip/tcp.h" |
| iva2k | 0:e614f7875b60 | 26 | |
| iva2k | 0:e614f7875b60 | 27 | //#define __DEBUG |
| iva2k | 0:e614f7875b60 | 28 | #include "dbg/dbg.h" |
| iva2k | 0:e614f7875b60 | 29 | |
| iva2k | 0:e614f7875b60 | 30 | #include "netCfg.h" |
| iva2k | 0:e614f7875b60 | 31 | #if NET_LWIP_STACK |
| iva2k | 0:e614f7875b60 | 32 | |
| iva2k | 0:e614f7875b60 | 33 | LwipNetTcpSocket::LwipNetTcpSocket(tcp_pcb* pPcb /*= NULL*/) : m_pPcb(pPcb), m_lpInNetTcpSocket(), //Passes a pcb if already created (by an accept req for instance), in that case transfers ownership |
| iva2k | 0:e614f7875b60 | 34 | m_pReadPbuf(NULL) |
| iva2k | 0:e614f7875b60 | 35 | { |
| iva2k | 1:3ee499525aa5 | 36 | DBG("New NetTcpSocket %p\r\n", (void*)this); |
| iva2k | 0:e614f7875b60 | 37 | if(!m_pPcb) |
| iva2k | 0:e614f7875b60 | 38 | m_pPcb = tcp_new(); |
| iva2k | 0:e614f7875b60 | 39 | if(m_pPcb) |
| iva2k | 0:e614f7875b60 | 40 | { |
| iva2k | 0:e614f7875b60 | 41 | //Setup callbacks |
| iva2k | 0:e614f7875b60 | 42 | tcp_arg( (tcp_pcb*) m_pPcb, (void*) this ); //this will be passed to each static callback |
| iva2k | 0:e614f7875b60 | 43 | |
| iva2k | 0:e614f7875b60 | 44 | tcp_recv( (tcp_pcb*) m_pPcb, LwipNetTcpSocket::sRecvCb ); |
| iva2k | 0:e614f7875b60 | 45 | tcp_sent((tcp_pcb*) m_pPcb, LwipNetTcpSocket::sSentCb ); |
| iva2k | 0:e614f7875b60 | 46 | tcp_err( (tcp_pcb*) m_pPcb, LwipNetTcpSocket::sErrCb ); |
| iva2k | 0:e614f7875b60 | 47 | //Connected callback is defined in connect() |
| iva2k | 0:e614f7875b60 | 48 | //Accept callback is defined in listen() |
| iva2k | 1:3ee499525aa5 | 49 | DBG("NetTcpSocket created.\r\n"); |
| iva2k | 0:e614f7875b60 | 50 | } |
| iva2k | 0:e614f7875b60 | 51 | } |
| iva2k | 0:e614f7875b60 | 52 | |
| iva2k | 0:e614f7875b60 | 53 | LwipNetTcpSocket::~LwipNetTcpSocket() |
| iva2k | 0:e614f7875b60 | 54 | { |
| iva2k | 0:e614f7875b60 | 55 | /* if(m_pPcb) |
| iva2k | 0:e614f7875b60 | 56 | tcp_close( (tcp_pcb*) m_pPcb); //Disconnect & free pcb*/ |
| iva2k | 0:e614f7875b60 | 57 | close(); |
| iva2k | 0:e614f7875b60 | 58 | } |
| iva2k | 0:e614f7875b60 | 59 | |
| iva2k | 0:e614f7875b60 | 60 | NetTcpSocketErr LwipNetTcpSocket::bind(const Host& me) |
| iva2k | 0:e614f7875b60 | 61 | { |
| iva2k | 0:e614f7875b60 | 62 | if(!m_pPcb) |
| iva2k | 0:e614f7875b60 | 63 | return NETTCPSOCKET_MEM; //NetTcpSocket was not properly initialised, should destroy it & retry |
| iva2k | 0:e614f7875b60 | 64 | |
| iva2k | 0:e614f7875b60 | 65 | err_t err = tcp_bind( (tcp_pcb*) m_pPcb, IP_ADDR_ANY, me.getPort()); //IP_ADDR_ANY : Bind the connection to all local addresses |
| iva2k | 0:e614f7875b60 | 66 | if(err) |
| iva2k | 0:e614f7875b60 | 67 | return NETTCPSOCKET_INUSE; |
| iva2k | 0:e614f7875b60 | 68 | |
| iva2k | 0:e614f7875b60 | 69 | return NETTCPSOCKET_OK; |
| iva2k | 0:e614f7875b60 | 70 | } |
| iva2k | 0:e614f7875b60 | 71 | |
| iva2k | 0:e614f7875b60 | 72 | NetTcpSocketErr LwipNetTcpSocket::listen() |
| iva2k | 0:e614f7875b60 | 73 | { |
| iva2k | 0:e614f7875b60 | 74 | if(!m_pPcb) |
| iva2k | 0:e614f7875b60 | 75 | return NETTCPSOCKET_MEM; //NetTcpSocket was not properly initialised, should destroy it & retry |
| iva2k | 0:e614f7875b60 | 76 | /* |
| iva2k | 0:e614f7875b60 | 77 | From doc/rawapi.txt : |
| iva2k | 0:e614f7875b60 | 78 | |
| iva2k | 0:e614f7875b60 | 79 | The tcp_listen() function returns a new connection identifier, and |
| iva2k | 0:e614f7875b60 | 80 | the one passed as an argument to the function will be |
| iva2k | 0:e614f7875b60 | 81 | deallocated. The reason for this behavior is that less memory is |
| iva2k | 0:e614f7875b60 | 82 | needed for a connection that is listening, so tcp_listen() will |
| iva2k | 0:e614f7875b60 | 83 | reclaim the memory needed for the original connection and allocate a |
| iva2k | 0:e614f7875b60 | 84 | new smaller memory block for the listening connection. |
| iva2k | 0:e614f7875b60 | 85 | */ |
| iva2k | 0:e614f7875b60 | 86 | |
| iva2k | 0:e614f7875b60 | 87 | // tcp_pcb* pNewPcb = tcp_listen(m_pPcb); |
| iva2k | 0:e614f7875b60 | 88 | tcp_pcb* pNewPcb = tcp_listen_with_backlog((tcp_pcb*)m_pPcb, 5); |
| iva2k | 0:e614f7875b60 | 89 | if( !pNewPcb ) //Not enough memory to create the listening pcb |
| iva2k | 0:e614f7875b60 | 90 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 91 | |
| iva2k | 0:e614f7875b60 | 92 | m_pPcb = pNewPcb; |
| iva2k | 0:e614f7875b60 | 93 | |
| iva2k | 0:e614f7875b60 | 94 | tcp_accept( (tcp_pcb*) m_pPcb, LwipNetTcpSocket::sAcceptCb ); |
| iva2k | 0:e614f7875b60 | 95 | |
| iva2k | 0:e614f7875b60 | 96 | return NETTCPSOCKET_OK; |
| iva2k | 0:e614f7875b60 | 97 | } |
| iva2k | 0:e614f7875b60 | 98 | |
| iva2k | 0:e614f7875b60 | 99 | NetTcpSocketErr LwipNetTcpSocket::connect(const Host& host) |
| iva2k | 0:e614f7875b60 | 100 | { |
| iva2k | 0:e614f7875b60 | 101 | if(!m_pPcb) |
| iva2k | 0:e614f7875b60 | 102 | return NETTCPSOCKET_MEM; //NetTcpSocket was not properly initialised, should destroy it & retry |
| iva2k | 0:e614f7875b60 | 103 | |
| iva2k | 0:e614f7875b60 | 104 | ip_addr_t ip = host.getIp().getStruct(); |
| iva2k | 0:e614f7875b60 | 105 | err_t err = tcp_connect( (tcp_pcb*) m_pPcb, &ip, host.getPort(), LwipNetTcpSocket::sConnectedCb ); |
| iva2k | 0:e614f7875b60 | 106 | |
| iva2k | 0:e614f7875b60 | 107 | if(!err) |
| iva2k | 0:e614f7875b60 | 108 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 109 | |
| iva2k | 0:e614f7875b60 | 110 | return NETTCPSOCKET_OK; |
| iva2k | 0:e614f7875b60 | 111 | } |
| iva2k | 0:e614f7875b60 | 112 | |
| iva2k | 0:e614f7875b60 | 113 | NetTcpSocketErr LwipNetTcpSocket::accept(Host* pClient, NetTcpSocket** ppNewNetTcpSocket) |
| iva2k | 0:e614f7875b60 | 114 | { |
| iva2k | 0:e614f7875b60 | 115 | if( !m_pPcb ) //Pcb doesn't exist (anymore) |
| iva2k | 0:e614f7875b60 | 116 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 117 | //Dequeue a connection |
| iva2k | 0:e614f7875b60 | 118 | //if( m_lpInPcb.empty() ) |
| iva2k | 0:e614f7875b60 | 119 | if( m_lpInNetTcpSocket.empty() ) |
| iva2k | 0:e614f7875b60 | 120 | return NETTCPSOCKET_EMPTY; |
| iva2k | 0:e614f7875b60 | 121 | |
| iva2k | 0:e614f7875b60 | 122 | tcp_accepted( ((tcp_pcb*) m_pPcb) ); //Should fire proper events //WARN: m_pPcb is the GOOD param here (and not pInPcb) |
| iva2k | 0:e614f7875b60 | 123 | |
| iva2k | 0:e614f7875b60 | 124 | /* tcp_pcb* pInPcb = m_lpInPcb.front(); |
| iva2k | 0:e614f7875b60 | 125 | m_lpInPcb.pop();*/ |
| iva2k | 0:e614f7875b60 | 126 | |
| iva2k | 0:e614f7875b60 | 127 | if( (m_lpInNetTcpSocket.front()) == NULL ) |
| iva2k | 0:e614f7875b60 | 128 | { |
| iva2k | 0:e614f7875b60 | 129 | m_lpInNetTcpSocket.pop(); |
| iva2k | 0:e614f7875b60 | 130 | return NETTCPSOCKET_RST; |
| iva2k | 0:e614f7875b60 | 131 | } |
| iva2k | 0:e614f7875b60 | 132 | |
| iva2k | 0:e614f7875b60 | 133 | if( (m_lpInNetTcpSocket.front())->m_closed ) |
| iva2k | 0:e614f7875b60 | 134 | { |
| iva2k | 0:e614f7875b60 | 135 | Net::releaseTcpSocket(m_lpInNetTcpSocket.front()); |
| iva2k | 0:e614f7875b60 | 136 | m_lpInNetTcpSocket.pop(); |
| iva2k | 0:e614f7875b60 | 137 | return NETTCPSOCKET_RST; |
| iva2k | 0:e614f7875b60 | 138 | } |
| iva2k | 0:e614f7875b60 | 139 | |
| iva2k | 0:e614f7875b60 | 140 | ip_addr_t* ip = (ip_addr_t*) &( (m_lpInNetTcpSocket.front()->m_pPcb)->remote_ip); |
| iva2k | 0:e614f7875b60 | 141 | |
| iva2k | 0:e614f7875b60 | 142 | *ppNewNetTcpSocket = m_lpInNetTcpSocket.front(); |
| iva2k | 0:e614f7875b60 | 143 | *pClient = Host( |
| iva2k | 0:e614f7875b60 | 144 | IpAddr( |
| iva2k | 0:e614f7875b60 | 145 | ip |
| iva2k | 0:e614f7875b60 | 146 | ), |
| iva2k | 0:e614f7875b60 | 147 | m_lpInNetTcpSocket.front()->m_pPcb->remote_port |
| iva2k | 0:e614f7875b60 | 148 | ); |
| iva2k | 0:e614f7875b60 | 149 | m_lpInNetTcpSocket.pop(); |
| iva2k | 0:e614f7875b60 | 150 | // *pClient = Host( IpAddr(pInPcb->remote_ip), pInPcb->remote_port ); |
| iva2k | 0:e614f7875b60 | 151 | |
| iva2k | 0:e614f7875b60 | 152 | //Return a new socket |
| iva2k | 0:e614f7875b60 | 153 | // *ppNewNetTcpSocket = (NetTcpSocket*) new LwipNetTcpSocket(pInPcb); |
| iva2k | 0:e614f7875b60 | 154 | |
| iva2k | 0:e614f7875b60 | 155 | //tcp_accepted( ((tcp_pcb*) m_pPcb) ); //Should fire proper events //WARN: m_pPcb is the GOOD param here (and not pInPcb) |
| iva2k | 0:e614f7875b60 | 156 | |
| iva2k | 0:e614f7875b60 | 157 | /* if(*ppNewNetTcpSocket == NULL) |
| iva2k | 0:e614f7875b60 | 158 | { |
| iva2k | 1:3ee499525aa5 | 159 | DBG("Not enough mem, socket dropped in LwipNetTcpSocket::accept.\r\n"); |
| iva2k | 0:e614f7875b60 | 160 | tcp_abort(pInPcb); |
| iva2k | 0:e614f7875b60 | 161 | }*/ |
| iva2k | 0:e614f7875b60 | 162 | |
| iva2k | 0:e614f7875b60 | 163 | return NETTCPSOCKET_OK; |
| iva2k | 0:e614f7875b60 | 164 | } |
| iva2k | 0:e614f7875b60 | 165 | |
| iva2k | 0:e614f7875b60 | 166 | #define MAX(a,b) ((a>b)?a:b) |
| iva2k | 0:e614f7875b60 | 167 | #define MIN(a,b) ((a<b)?a:b) |
| iva2k | 0:e614f7875b60 | 168 | |
| iva2k | 0:e614f7875b60 | 169 | int /*if < 0 : NetTcpSocketErr*/ LwipNetTcpSocket::send(const char* buf, int len) |
| iva2k | 0:e614f7875b60 | 170 | { |
| iva2k | 0:e614f7875b60 | 171 | if( !m_pPcb ) //Pcb doesn't exist (anymore) |
| iva2k | 0:e614f7875b60 | 172 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 173 | int outLen = MIN( len, tcp_sndbuf( (tcp_pcb*) m_pPcb) ); |
| iva2k | 0:e614f7875b60 | 174 | //tcp_sndbuf() returns the number of bytes available in the output queue, so never go above it |
| iva2k | 0:e614f7875b60 | 175 | err_t err = tcp_write( (tcp_pcb*) m_pPcb, (void*) buf, outLen, TCP_WRITE_FLAG_COPY ); |
| iva2k | 0:e614f7875b60 | 176 | //Flags are TCP_WRITE_FLAG_COPY & TCP_WRITE_FLAG_MORE (see tcp_out.c) : |
| iva2k | 0:e614f7875b60 | 177 | //If TCP_WRITE_FLAG_MORE is not set ask client to push buffered data to app |
| iva2k | 0:e614f7875b60 | 178 | if(err) |
| iva2k | 0:e614f7875b60 | 179 | { |
| iva2k | 0:e614f7875b60 | 180 | switch( err ) |
| iva2k | 0:e614f7875b60 | 181 | { |
| iva2k | 0:e614f7875b60 | 182 | case ERR_CONN: |
| iva2k | 0:e614f7875b60 | 183 | return (int) NETTCPSOCKET_SETUP; //Not connected properly |
| iva2k | 0:e614f7875b60 | 184 | case ERR_ARG: |
| iva2k | 0:e614f7875b60 | 185 | return (int) NETTCPSOCKET_SETUP; //Wrong args ! (like buf pointing to NULL) |
| iva2k | 0:e614f7875b60 | 186 | case ERR_MEM: |
| iva2k | 0:e614f7875b60 | 187 | default: |
| iva2k | 0:e614f7875b60 | 188 | return (int) NETTCPSOCKET_MEM; //Not enough memory |
| iva2k | 0:e614f7875b60 | 189 | } |
| iva2k | 0:e614f7875b60 | 190 | } |
| iva2k | 0:e614f7875b60 | 191 | return outLen; |
| iva2k | 0:e614f7875b60 | 192 | } |
| iva2k | 0:e614f7875b60 | 193 | |
| iva2k | 0:e614f7875b60 | 194 | int /*if < 0 : NetTcpSocketErr*/ LwipNetTcpSocket::recv(char* buf, int len) |
| iva2k | 0:e614f7875b60 | 195 | { |
| iva2k | 0:e614f7875b60 | 196 | if( !m_pPcb ) //Pcb doesn't exist (anymore) |
| iva2k | 0:e614f7875b60 | 197 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 198 | int inLen = 0; |
| iva2k | 0:e614f7875b60 | 199 | int cpyLen = 0; |
| iva2k | 0:e614f7875b60 | 200 | |
| iva2k | 0:e614f7875b60 | 201 | static int rmgLen = 0; |
| iva2k | 0:e614f7875b60 | 202 | //Contains the remaining len in this pbuf |
| iva2k | 0:e614f7875b60 | 203 | |
| iva2k | 0:e614f7875b60 | 204 | if( !m_pReadPbuf ) |
| iva2k | 0:e614f7875b60 | 205 | { |
| iva2k | 0:e614f7875b60 | 206 | rmgLen = 0; |
| iva2k | 0:e614f7875b60 | 207 | return 0; |
| iva2k | 0:e614f7875b60 | 208 | } |
| iva2k | 0:e614f7875b60 | 209 | |
| iva2k | 0:e614f7875b60 | 210 | if ( !rmgLen ) //We did not know m_pReadPbuf->len last time we called this fn |
| iva2k | 0:e614f7875b60 | 211 | { |
| iva2k | 0:e614f7875b60 | 212 | rmgLen = m_pReadPbuf->len; |
| iva2k | 0:e614f7875b60 | 213 | } |
| iva2k | 0:e614f7875b60 | 214 | |
| iva2k | 0:e614f7875b60 | 215 | while ( inLen < len ) |
| iva2k | 0:e614f7875b60 | 216 | { |
| iva2k | 0:e614f7875b60 | 217 | cpyLen = MIN( (len - inLen), rmgLen ); //Remaining len to copy, remaining len in THIS pbuf |
| iva2k | 0:e614f7875b60 | 218 | memcpy((void*)buf, (void*)((char*)(m_pReadPbuf->payload) + (m_pReadPbuf->len - rmgLen)), cpyLen); |
| iva2k | 0:e614f7875b60 | 219 | inLen += cpyLen; |
| iva2k | 0:e614f7875b60 | 220 | buf += cpyLen; |
| iva2k | 0:e614f7875b60 | 221 | |
| iva2k | 0:e614f7875b60 | 222 | rmgLen = rmgLen - cpyLen; //Update rmgLen |
| iva2k | 0:e614f7875b60 | 223 | |
| iva2k | 0:e614f7875b60 | 224 | if( rmgLen > 0 ) |
| iva2k | 0:e614f7875b60 | 225 | { |
| iva2k | 0:e614f7875b60 | 226 | //We did not read this pbuf completely, so let's save it's pos & return |
| iva2k | 0:e614f7875b60 | 227 | break; |
| iva2k | 0:e614f7875b60 | 228 | } |
| iva2k | 0:e614f7875b60 | 229 | |
| iva2k | 0:e614f7875b60 | 230 | if(m_pReadPbuf->next) |
| iva2k | 0:e614f7875b60 | 231 | { |
| iva2k | 0:e614f7875b60 | 232 | pbuf* pNextPBuf = m_pReadPbuf->next; |
| iva2k | 0:e614f7875b60 | 233 | m_pReadPbuf->next = NULL; //So that it is not freed as well |
| iva2k | 0:e614f7875b60 | 234 | //We get the reference to pNextPBuf from m_pReadPbuf |
| iva2k | 0:e614f7875b60 | 235 | pbuf_free((pbuf*)m_pReadPbuf); |
| iva2k | 0:e614f7875b60 | 236 | m_pReadPbuf = pNextPBuf; |
| iva2k | 0:e614f7875b60 | 237 | rmgLen = m_pReadPbuf->len; |
| iva2k | 0:e614f7875b60 | 238 | } |
| iva2k | 0:e614f7875b60 | 239 | else |
| iva2k | 0:e614f7875b60 | 240 | { |
| iva2k | 0:e614f7875b60 | 241 | pbuf_free((pbuf*)m_pReadPbuf); |
| iva2k | 0:e614f7875b60 | 242 | m_pReadPbuf = NULL; |
| iva2k | 0:e614f7875b60 | 243 | rmgLen = 0; |
| iva2k | 0:e614f7875b60 | 244 | break; //No more data to read |
| iva2k | 0:e614f7875b60 | 245 | } |
| iva2k | 0:e614f7875b60 | 246 | |
| iva2k | 0:e614f7875b60 | 247 | } |
| iva2k | 0:e614f7875b60 | 248 | |
| iva2k | 0:e614f7875b60 | 249 | //tcp_recved(m_pPcb, inLen); //Acknowledge the reception |
| iva2k | 0:e614f7875b60 | 250 | |
| iva2k | 0:e614f7875b60 | 251 | return inLen; |
| iva2k | 0:e614f7875b60 | 252 | } |
| iva2k | 0:e614f7875b60 | 253 | |
| iva2k | 0:e614f7875b60 | 254 | NetTcpSocketErr LwipNetTcpSocket::close() |
| iva2k | 0:e614f7875b60 | 255 | { |
| iva2k | 1:3ee499525aa5 | 256 | //DBG("Closing...\r\n"); |
| iva2k | 0:e614f7875b60 | 257 | |
| iva2k | 0:e614f7875b60 | 258 | if(m_closed) |
| iva2k | 0:e614f7875b60 | 259 | return NETTCPSOCKET_OK; //Already being closed |
| iva2k | 0:e614f7875b60 | 260 | m_closed = true; |
| iva2k | 0:e614f7875b60 | 261 | |
| iva2k | 0:e614f7875b60 | 262 | if( !m_pPcb ) //Pcb doesn't exist (anymore) |
| iva2k | 0:e614f7875b60 | 263 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 264 | |
| iva2k | 0:e614f7875b60 | 265 | //Cleanup incoming data |
| iva2k | 0:e614f7875b60 | 266 | cleanUp(); |
| iva2k | 0:e614f7875b60 | 267 | |
| iva2k | 0:e614f7875b60 | 268 | if( !!tcp_close( (tcp_pcb*) m_pPcb) ) |
| iva2k | 0:e614f7875b60 | 269 | { |
| iva2k | 1:3ee499525aa5 | 270 | DBG("could not close properly, abort.\r\n"); |
| iva2k | 0:e614f7875b60 | 271 | tcp_abort( (tcp_pcb*) m_pPcb); |
| iva2k | 0:e614f7875b60 | 272 | m_pPcb = NULL; |
| iva2k | 0:e614f7875b60 | 273 | return NETTCPSOCKET_MEM; |
| iva2k | 0:e614f7875b60 | 274 | } |
| iva2k | 0:e614f7875b60 | 275 | |
| iva2k | 1:3ee499525aa5 | 276 | DBG("connection closed successfully.\r\n"); |
| iva2k | 0:e614f7875b60 | 277 | |
| iva2k | 0:e614f7875b60 | 278 | m_pPcb = NULL; |
| iva2k | 0:e614f7875b60 | 279 | return NETTCPSOCKET_OK; |
| iva2k | 0:e614f7875b60 | 280 | } |
| iva2k | 0:e614f7875b60 | 281 | |
| iva2k | 0:e614f7875b60 | 282 | NetTcpSocketErr LwipNetTcpSocket::poll() |
| iva2k | 0:e614f7875b60 | 283 | { |
| iva2k | 0:e614f7875b60 | 284 | NetTcpSocket::flushEvents(); |
| iva2k | 0:e614f7875b60 | 285 | return NETTCPSOCKET_OK; |
| iva2k | 0:e614f7875b60 | 286 | } |
| iva2k | 0:e614f7875b60 | 287 | |
| iva2k | 0:e614f7875b60 | 288 | // Callbacks events |
| iva2k | 0:e614f7875b60 | 289 | |
| iva2k | 0:e614f7875b60 | 290 | err_t LwipNetTcpSocket::acceptCb(struct tcp_pcb *newpcb, err_t err) |
| iva2k | 0:e614f7875b60 | 291 | { |
| iva2k | 0:e614f7875b60 | 292 | if(err) |
| iva2k | 0:e614f7875b60 | 293 | { |
| iva2k | 1:3ee499525aa5 | 294 | DBG("Error %d in LwipNetTcpSocket::acceptCb.\r\n", err); |
| iva2k | 0:e614f7875b60 | 295 | return err; |
| iva2k | 0:e614f7875b60 | 296 | } |
| iva2k | 0:e614f7875b60 | 297 | //FIXME: MEM Errs |
| iva2k | 0:e614f7875b60 | 298 | //m_lpInPcb.push(newpcb); //Add connection to the queue |
| iva2k | 0:e614f7875b60 | 299 | LwipNetTcpSocket* pNewNetTcpSocket = new LwipNetTcpSocket(newpcb); |
| iva2k | 0:e614f7875b60 | 300 | |
| iva2k | 0:e614f7875b60 | 301 | if(pNewNetTcpSocket == NULL) |
| iva2k | 0:e614f7875b60 | 302 | { |
| iva2k | 1:3ee499525aa5 | 303 | DBG("Not enough mem, socket dropped in LwipNetTcpSocket::acceptCb.\r\n"); |
| iva2k | 0:e614f7875b60 | 304 | tcp_abort(newpcb); |
| iva2k | 0:e614f7875b60 | 305 | return ERR_ABRT; |
| iva2k | 0:e614f7875b60 | 306 | } |
| iva2k | 0:e614f7875b60 | 307 | |
| iva2k | 0:e614f7875b60 | 308 | pNewNetTcpSocket->m_refs++; |
| iva2k | 0:e614f7875b60 | 309 | m_lpInNetTcpSocket.push( pNewNetTcpSocket ); |
| iva2k | 0:e614f7875b60 | 310 | |
| iva2k | 0:e614f7875b60 | 311 | // tcp_accepted(newpcb); |
| iva2k | 0:e614f7875b60 | 312 | // tcp_accepted( m_pPcb ); //Should fire proper events //WARN: m_pPcb is the GOOD param here (and not pInPcb) |
| iva2k | 0:e614f7875b60 | 313 | queueEvent(NETTCPSOCKET_ACCEPT); |
| iva2k | 0:e614f7875b60 | 314 | return ERR_OK; |
| iva2k | 0:e614f7875b60 | 315 | } |
| iva2k | 0:e614f7875b60 | 316 | |
| iva2k | 0:e614f7875b60 | 317 | err_t LwipNetTcpSocket::connectedCb(struct tcp_pcb *tpcb, err_t err) |
| iva2k | 0:e614f7875b60 | 318 | { |
| iva2k | 0:e614f7875b60 | 319 | queueEvent(NETTCPSOCKET_CONNECTED); |
| iva2k | 0:e614f7875b60 | 320 | return ERR_OK; |
| iva2k | 0:e614f7875b60 | 321 | } |
| iva2k | 0:e614f7875b60 | 322 | |
| iva2k | 0:e614f7875b60 | 323 | void LwipNetTcpSocket::errCb(err_t err) |
| iva2k | 0:e614f7875b60 | 324 | { |
| iva2k | 1:3ee499525aa5 | 325 | DBG("NetTcpSocket %p - Error %d in LwipNetTcpSocket::errCb.\r\n", (void*)this, err); |
| iva2k | 0:e614f7875b60 | 326 | //WARN: At this point, m_pPcb has been freed by lwIP |
| iva2k | 0:e614f7875b60 | 327 | m_pPcb = NULL; |
| iva2k | 0:e614f7875b60 | 328 | //These errors are fatal, discard all events queued before so that the errors are handled first |
| iva2k | 0:e614f7875b60 | 329 | discardEvents(); |
| iva2k | 0:e614f7875b60 | 330 | m_closed = true; |
| iva2k | 0:e614f7875b60 | 331 | cleanUp(); |
| iva2k | 0:e614f7875b60 | 332 | if( err == ERR_ABRT) |
| iva2k | 0:e614f7875b60 | 333 | queueEvent(NETTCPSOCKET_CONABRT); |
| iva2k | 0:e614f7875b60 | 334 | else //if( err == ERR_RST) |
| iva2k | 0:e614f7875b60 | 335 | queueEvent(NETTCPSOCKET_CONRST); |
| iva2k | 0:e614f7875b60 | 336 | } |
| iva2k | 0:e614f7875b60 | 337 | |
| iva2k | 0:e614f7875b60 | 338 | err_t LwipNetTcpSocket::sentCb(tcp_pcb* tpcb, u16_t len) |
| iva2k | 0:e614f7875b60 | 339 | { |
| iva2k | 1:3ee499525aa5 | 340 | // DBG("%d bytes ACKed by host.\r\n", len); |
| iva2k | 0:e614f7875b60 | 341 | queueEvent(NETTCPSOCKET_WRITEABLE); |
| iva2k | 0:e614f7875b60 | 342 | return ERR_OK; |
| iva2k | 0:e614f7875b60 | 343 | } |
| iva2k | 0:e614f7875b60 | 344 | |
| iva2k | 0:e614f7875b60 | 345 | err_t LwipNetTcpSocket::recvCb(tcp_pcb* tpcb, pbuf *p, err_t err) |
| iva2k | 0:e614f7875b60 | 346 | { |
| iva2k | 0:e614f7875b60 | 347 | //Store pbuf ptr |
| iva2k | 1:3ee499525aa5 | 348 | // DBG("Receive CB with err = %d & len = %d.\r\n", err, p->tot_len); |
| iva2k | 0:e614f7875b60 | 349 | // tcp_recved( (tcp_pcb*) m_pPcb, p->tot_len); //Acknowledge the reception |
| iva2k | 0:e614f7875b60 | 350 | |
| iva2k | 0:e614f7875b60 | 351 | if(err) |
| iva2k | 0:e614f7875b60 | 352 | { |
| iva2k | 0:e614f7875b60 | 353 | queueEvent(NETTCPSOCKET_ERROR); |
| iva2k | 0:e614f7875b60 | 354 | return ERR_OK; //FIXME: More robust error handling there |
| iva2k | 0:e614f7875b60 | 355 | } |
| iva2k | 0:e614f7875b60 | 356 | else if(!p) |
| iva2k | 0:e614f7875b60 | 357 | { |
| iva2k | 1:3ee499525aa5 | 358 | DBG("NetTcpSocket %p - Connection closed by remote host (LwipNetTcpSocket::recvCb).\r\n", (void*)this); |
| iva2k | 0:e614f7875b60 | 359 | //Buf is NULL, that means that the connection has been closed by remote host |
| iva2k | 0:e614f7875b60 | 360 | |
| iva2k | 0:e614f7875b60 | 361 | //FIX: 27/05/2010: We do not want to deallocate the socket while some data might still be readable |
| iva2k | 0:e614f7875b60 | 362 | //REMOVED: close(); |
| iva2k | 0:e614f7875b60 | 363 | |
| iva2k | 0:e614f7875b60 | 364 | //However we do not want to close the socket yet |
| iva2k | 0:e614f7875b60 | 365 | |
| iva2k | 0:e614f7875b60 | 366 | queueEvent(NETTCPSOCKET_DISCONNECTED); |
| iva2k | 0:e614f7875b60 | 367 | return ERR_OK; |
| iva2k | 0:e614f7875b60 | 368 | } |
| iva2k | 0:e614f7875b60 | 369 | |
| iva2k | 0:e614f7875b60 | 370 | //We asserted that p is a valid pointer |
| iva2k | 0:e614f7875b60 | 371 | |
| iva2k | 0:e614f7875b60 | 372 | //New data processing |
| iva2k | 0:e614f7875b60 | 373 | tcp_recved( tpcb, p->tot_len); //Acknowledge the reception |
| iva2k | 0:e614f7875b60 | 374 | if(!m_pReadPbuf) |
| iva2k | 0:e614f7875b60 | 375 | { |
| iva2k | 0:e614f7875b60 | 376 | m_pReadPbuf = p; |
| iva2k | 0:e614f7875b60 | 377 | queueEvent(NETTCPSOCKET_READABLE); |
| iva2k | 0:e614f7875b60 | 378 | } |
| iva2k | 0:e614f7875b60 | 379 | else |
| iva2k | 0:e614f7875b60 | 380 | { |
| iva2k | 0:e614f7875b60 | 381 | pbuf_cat((pbuf*)m_pReadPbuf, p); //m_pReadPbuf is not empty, tail p to it and drop our ref |
| iva2k | 0:e614f7875b60 | 382 | //No need to queue an event in that case since the read buf has not been processed yet |
| iva2k | 0:e614f7875b60 | 383 | } |
| iva2k | 0:e614f7875b60 | 384 | return ERR_OK; |
| iva2k | 0:e614f7875b60 | 385 | } |
| iva2k | 0:e614f7875b60 | 386 | |
| iva2k | 0:e614f7875b60 | 387 | |
| iva2k | 0:e614f7875b60 | 388 | void LwipNetTcpSocket::cleanUp() //Flush input buffer |
| iva2k | 0:e614f7875b60 | 389 | { |
| iva2k | 0:e614f7875b60 | 390 | //Ensure that further error won't be followed to this inst (which can be destroyed) |
| iva2k | 0:e614f7875b60 | 391 | if( m_pPcb ) |
| iva2k | 0:e614f7875b60 | 392 | { |
| iva2k | 0:e614f7875b60 | 393 | tcp_arg( (tcp_pcb*) m_pPcb, (void*) NULL ); |
| iva2k | 0:e614f7875b60 | 394 | tcp_recv( (tcp_pcb*) m_pPcb, NULL ); |
| iva2k | 0:e614f7875b60 | 395 | tcp_sent((tcp_pcb*) m_pPcb, NULL ); |
| iva2k | 0:e614f7875b60 | 396 | tcp_err( (tcp_pcb*) m_pPcb, NULL ); |
| iva2k | 0:e614f7875b60 | 397 | } |
| iva2k | 0:e614f7875b60 | 398 | |
| iva2k | 0:e614f7875b60 | 399 | if( m_pReadPbuf ) |
| iva2k | 0:e614f7875b60 | 400 | { |
| iva2k | 1:3ee499525aa5 | 401 | DBG("Deallocating unread data.\r\n"); |
| iva2k | 0:e614f7875b60 | 402 | pbuf_free((pbuf*)m_pReadPbuf); //Free all unread data |
| iva2k | 0:e614f7875b60 | 403 | m_pReadPbuf = NULL; |
| iva2k | 0:e614f7875b60 | 404 | recv(NULL,0); //Update recv ptr position |
| iva2k | 0:e614f7875b60 | 405 | } |
| iva2k | 0:e614f7875b60 | 406 | } |
| iva2k | 0:e614f7875b60 | 407 | |
| iva2k | 0:e614f7875b60 | 408 | // Static callbacks from LwIp |
| iva2k | 0:e614f7875b60 | 409 | |
| iva2k | 0:e614f7875b60 | 410 | err_t LwipNetTcpSocket::sAcceptCb(void *arg, struct tcp_pcb *newpcb, err_t err) |
| iva2k | 0:e614f7875b60 | 411 | { |
| iva2k | 0:e614f7875b60 | 412 | LwipNetTcpSocket* pMe = (LwipNetTcpSocket*) arg; |
| iva2k | 0:e614f7875b60 | 413 | return pMe->acceptCb( newpcb, err ); |
| iva2k | 0:e614f7875b60 | 414 | } |
| iva2k | 0:e614f7875b60 | 415 | |
| iva2k | 0:e614f7875b60 | 416 | err_t LwipNetTcpSocket::sConnectedCb(void *arg, struct tcp_pcb *tpcb, err_t err) |
| iva2k | 0:e614f7875b60 | 417 | { |
| iva2k | 0:e614f7875b60 | 418 | LwipNetTcpSocket* pMe = (LwipNetTcpSocket*) arg; |
| iva2k | 0:e614f7875b60 | 419 | return pMe->connectedCb( tpcb, err ); |
| iva2k | 0:e614f7875b60 | 420 | } |
| iva2k | 0:e614f7875b60 | 421 | |
| iva2k | 0:e614f7875b60 | 422 | void LwipNetTcpSocket::sErrCb(void *arg, err_t err) |
| iva2k | 0:e614f7875b60 | 423 | { |
| iva2k | 0:e614f7875b60 | 424 | if( !arg ) |
| iva2k | 0:e614f7875b60 | 425 | { |
| iva2k | 1:3ee499525aa5 | 426 | DBG("NetTcpSocket - Error %d in LwipNetTcpSocket::sErrCb.\r\n", err); |
| iva2k | 0:e614f7875b60 | 427 | return; //The socket has been destroyed, discard error |
| iva2k | 0:e614f7875b60 | 428 | } |
| iva2k | 0:e614f7875b60 | 429 | LwipNetTcpSocket* pMe = (LwipNetTcpSocket*) arg; |
| iva2k | 0:e614f7875b60 | 430 | return pMe->errCb( err ); |
| iva2k | 0:e614f7875b60 | 431 | } |
| iva2k | 0:e614f7875b60 | 432 | |
| iva2k | 0:e614f7875b60 | 433 | err_t LwipNetTcpSocket::sSentCb(void *arg, struct tcp_pcb *tpcb, u16_t len) |
| iva2k | 0:e614f7875b60 | 434 | { |
| iva2k | 0:e614f7875b60 | 435 | LwipNetTcpSocket* pMe = (LwipNetTcpSocket*) arg; |
| iva2k | 0:e614f7875b60 | 436 | return pMe->sentCb( tpcb, len ); |
| iva2k | 0:e614f7875b60 | 437 | } |
| iva2k | 0:e614f7875b60 | 438 | |
| iva2k | 0:e614f7875b60 | 439 | err_t LwipNetTcpSocket::sRecvCb(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err) |
| iva2k | 0:e614f7875b60 | 440 | { |
| iva2k | 0:e614f7875b60 | 441 | if( tpcb->flags & TF_RXCLOSED ) |
| iva2k | 0:e614f7875b60 | 442 | { |
| iva2k | 0:e614f7875b60 | 443 | //The Pcb is in a closing state |
| iva2k | 0:e614f7875b60 | 444 | //Discard that data here since we might have destroyed the corresponding socket object |
| iva2k | 0:e614f7875b60 | 445 | tcp_recved( tpcb, p->tot_len); |
| iva2k | 0:e614f7875b60 | 446 | pbuf_free( p ); |
| iva2k | 0:e614f7875b60 | 447 | return ERR_OK; |
| iva2k | 0:e614f7875b60 | 448 | } |
| iva2k | 0:e614f7875b60 | 449 | LwipNetTcpSocket* pMe = (LwipNetTcpSocket*) arg; |
| iva2k | 0:e614f7875b60 | 450 | return pMe->recvCb( tpcb, p, err ); |
| iva2k | 0:e614f7875b60 | 451 | } |
| iva2k | 0:e614f7875b60 | 452 | |
| iva2k | 0:e614f7875b60 | 453 | #endif |