Henrik Ekblad
2fd948fc66
Upgraded RF24 to latest version which supports SoftSPI. Added DigitalIO and UTFT libraries to support the new example. Fix problem reported in RelayWithButtonActuator example.
384 lines
10 KiB
C++
384 lines
10 KiB
C++
/*
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UIPUdp.cpp - Arduino implementation of a uIP wrapper class.
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Copyright (c) 2013 Norbert Truchsess <norbert.truchsess@t-online.de>
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All rights reserved.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "UIPEthernet.h"
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#include "UIPUdp.h"
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#include "Dns.h"
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#ifdef UIPETHERNET_DEBUG_UDP
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#include "HardwareSerial.h"
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#endif
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extern "C" {
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#include "utility/uip-conf.h"
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#include "utility/uip.h"
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#include "utility/uip_arp.h"
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}
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#if UIP_UDP
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#define UIP_ARPHDRSIZE 42
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#define UDPBUF ((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])
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// Constructor
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UIPUDP::UIPUDP() :
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_uip_udp_conn(NULL)
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{
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memset(&appdata,0,sizeof(appdata));
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}
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// initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
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uint8_t
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UIPUDP::begin(uint16_t port)
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{
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if (!_uip_udp_conn)
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{
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_uip_udp_conn = uip_udp_new(NULL, 0);
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}
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if (_uip_udp_conn)
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{
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uip_udp_bind(_uip_udp_conn,htons(port));
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_uip_udp_conn->appstate = &appdata;
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return 1;
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}
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return 0;
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}
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// Finish with the UDP socket
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void
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UIPUDP::stop()
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{
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if (_uip_udp_conn)
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{
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uip_udp_remove(_uip_udp_conn);
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_uip_udp_conn->appstate = NULL;
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_uip_udp_conn=NULL;
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Enc28J60Network::freeBlock(appdata.packet_in);
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Enc28J60Network::freeBlock(appdata.packet_next);
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Enc28J60Network::freeBlock(appdata.packet_out);
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memset(&appdata,0,sizeof(appdata));
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}
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}
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// Sending UDP packets
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// Start building up a packet to send to the remote host specific in ip and port
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// Returns 1 if successful, 0 if there was a problem with the supplied IP address or port
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int
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UIPUDP::beginPacket(IPAddress ip, uint16_t port)
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{
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UIPEthernetClass::tick();
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if (ip && port)
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{
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uip_ipaddr_t ripaddr;
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uip_ip_addr(&ripaddr, ip);
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.print(F("udp beginPacket, "));
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#endif
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if (_uip_udp_conn)
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{
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_uip_udp_conn->rport = htons(port);
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uip_ipaddr_copy(_uip_udp_conn->ripaddr, &ripaddr);
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}
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else
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{
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_uip_udp_conn = uip_udp_new(&ripaddr,htons(port));
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if (_uip_udp_conn)
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{
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.print(F("new connection, "));
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#endif
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_uip_udp_conn->appstate = &appdata;
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}
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else
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{
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.println(F("failed to allocate new connection"));
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#endif
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return 0;
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}
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}
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.print(F("rip: "));
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Serial.print(ip);
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Serial.print(F(", port: "));
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Serial.println(port);
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#endif
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}
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if (_uip_udp_conn)
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{
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if (appdata.packet_out == NOBLOCK)
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{
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appdata.packet_out = Enc28J60Network::allocBlock(UIP_UDP_MAXPACKETSIZE);
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appdata.out_pos = UIP_UDP_PHYH_LEN;
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if (appdata.packet_out != NOBLOCK)
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return 1;
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#ifdef UIPETHERNET_DEBUG_UDP
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else
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Serial.println(F("failed to allocate memory for packet"));
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#endif
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}
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#ifdef UIPETHERNET_DEBUG_UDP
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else
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Serial.println(F("previous packet on that connection not sent yet"));
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#endif
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}
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return 0;
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}
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// Start building up a packet to send to the remote host specific in host and port
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// Returns 1 if successful, 0 if there was a problem resolving the hostname or port
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int
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UIPUDP::beginPacket(const char *host, uint16_t port)
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{
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// Look up the host first
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int ret = 0;
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DNSClient dns;
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IPAddress remote_addr;
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dns.begin(UIPEthernet.dnsServerIP());
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ret = dns.getHostByName(host, remote_addr);
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if (ret == 1) {
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return beginPacket(remote_addr, port);
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} else {
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return ret;
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}
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}
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// Finish off this packet and send it
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// Returns 1 if the packet was sent successfully, 0 if there was an error
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int
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UIPUDP::endPacket()
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{
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if (_uip_udp_conn && appdata.packet_out != NOBLOCK)
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{
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appdata.send = true;
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Enc28J60Network::resizeBlock(appdata.packet_out,0,appdata.out_pos);
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uip_udp_periodic_conn(_uip_udp_conn);
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if (uip_len > 0)
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{
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_send(&appdata);
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return 1;
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}
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}
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return 0;
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}
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// Write a single byte into the packet
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size_t
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UIPUDP::write(uint8_t c)
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{
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return write(&c,1);
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}
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// Write size bytes from buffer into the packet
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size_t
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UIPUDP::write(const uint8_t *buffer, size_t size)
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{
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if (appdata.packet_out != NOBLOCK)
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{
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size_t ret = Enc28J60Network::writePacket(appdata.packet_out,appdata.out_pos,(uint8_t*)buffer,size);
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appdata.out_pos += ret;
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return ret;
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}
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return 0;
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}
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// Start processing the next available incoming packet
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// Returns the size of the packet in bytes, or 0 if no packets are available
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int
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UIPUDP::parsePacket()
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{
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UIPEthernetClass::tick();
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#ifdef UIPETHERNET_DEBUG_UDP
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if (appdata.packet_in != NOBLOCK)
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{
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Serial.print(F("udp parsePacket freeing previous packet: "));
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Serial.println(appdata.packet_in);
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}
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#endif
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Enc28J60Network::freeBlock(appdata.packet_in);
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appdata.packet_in = appdata.packet_next;
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appdata.packet_next = NOBLOCK;
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#ifdef UIPETHERNET_DEBUG_UDP
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if (appdata.packet_in != NOBLOCK)
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{
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Serial.print(F("udp parsePacket received packet: "));
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Serial.print(appdata.packet_in);
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}
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#endif
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int size = Enc28J60Network::blockSize(appdata.packet_in);
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#ifdef UIPETHERNET_DEBUG_UDP
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if (appdata.packet_in != NOBLOCK)
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{
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Serial.print(F(", size: "));
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Serial.println(size);
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}
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#endif
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return size;
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}
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// Number of bytes remaining in the current packet
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int
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UIPUDP::available()
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{
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UIPEthernetClass::tick();
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return Enc28J60Network::blockSize(appdata.packet_in);
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}
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// Read a single byte from the current packet
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int
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UIPUDP::read()
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{
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unsigned char c;
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if (read(&c,1) > 0)
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{
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return c;
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}
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return -1;
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}
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// Read up to len bytes from the current packet and place them into buffer
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// Returns the number of bytes read, or 0 if none are available
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int
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UIPUDP::read(unsigned char* buffer, size_t len)
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{
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UIPEthernetClass::tick();
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if (appdata.packet_in != NOBLOCK)
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{
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memaddress read = Enc28J60Network::readPacket(appdata.packet_in,0,buffer,len);
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if (read == Enc28J60Network::blockSize(appdata.packet_in))
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{
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Enc28J60Network::freeBlock(appdata.packet_in);
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appdata.packet_in = NOBLOCK;
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}
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else
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Enc28J60Network::resizeBlock(appdata.packet_in,read);
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return read;
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}
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return 0;
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}
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// Return the next byte from the current packet without moving on to the next byte
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int
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UIPUDP::peek()
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{
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UIPEthernetClass::tick();
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if (appdata.packet_in != NOBLOCK)
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{
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unsigned char c;
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if (Enc28J60Network::readPacket(appdata.packet_in,0,&c,1) == 1)
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return c;
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}
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return -1;
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}
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// Finish reading the current packet
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void
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UIPUDP::flush()
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{
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UIPEthernetClass::tick();
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Enc28J60Network::freeBlock(appdata.packet_in);
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appdata.packet_in = NOBLOCK;
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}
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// Return the IP address of the host who sent the current incoming packet
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IPAddress
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UIPUDP::remoteIP()
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{
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return _uip_udp_conn ? ip_addr_uip(_uip_udp_conn->ripaddr) : IPAddress();
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}
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// Return the port of the host who sent the current incoming packet
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uint16_t
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UIPUDP::remotePort()
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{
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return _uip_udp_conn ? ntohs(_uip_udp_conn->rport) : 0;
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}
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// uIP callback function
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void
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uipudp_appcall(void) {
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if (uip_udp_userdata_t *data = (uip_udp_userdata_t *)(uip_udp_conn->appstate))
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{
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if (uip_newdata())
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{
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if (data->packet_next == NOBLOCK)
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{
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uip_udp_conn->rport = UDPBUF->srcport;
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uip_ipaddr_copy(uip_udp_conn->ripaddr,UDPBUF->srcipaddr);
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data->packet_next = Enc28J60Network::allocBlock(ntohs(UDPBUF->udplen)-UIP_UDPH_LEN);
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//if we are unable to allocate memory the packet is dropped. udp doesn't guarantee packet delivery
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if (data->packet_next != NOBLOCK)
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{
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//discard Linklevel and IP and udp-header and any trailing bytes:
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Enc28J60Network::copyPacket(data->packet_next,0,UIPEthernetClass::in_packet,UIP_UDP_PHYH_LEN,Enc28J60Network::blockSize(data->packet_next));
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.print(F("udp, uip_newdata received packet: "));
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Serial.print(data->packet_next);
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Serial.print(F(", size: "));
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Serial.println(Enc28J60Network::blockSize(data->packet_next));
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#endif
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}
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}
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}
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if (uip_poll() && data->send)
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{
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//set uip_slen (uip private) by calling uip_udp_send
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.print(F("udp, uip_poll preparing packet to send: "));
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Serial.print(data->packet_out);
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Serial.print(F(", size: "));
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Serial.println(Enc28J60Network::blockSize(data->packet_out));
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#endif
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UIPEthernetClass::uip_packet = data->packet_out;
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UIPEthernetClass::uip_hdrlen = UIP_UDP_PHYH_LEN;
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uip_udp_send(data->out_pos - (UIP_UDP_PHYH_LEN));
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}
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}
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}
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void
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UIPUDP::_send(uip_udp_userdata_t *data) {
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uip_arp_out(); //add arp
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if (uip_len == UIP_ARPHDRSIZE)
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{
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UIPEthernetClass::uip_packet = NOBLOCK;
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UIPEthernetClass::packetstate &= ~UIPETHERNET_SENDPACKET;
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.println(F("udp, uip_poll results in ARP-packet"));
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#endif
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}
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else
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//arp found ethaddr for ip (otherwise packet is replaced by arp-request)
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{
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data->send = false;
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data->packet_out = NOBLOCK;
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UIPEthernetClass::packetstate |= UIPETHERNET_SENDPACKET;
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#ifdef UIPETHERNET_DEBUG_UDP
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Serial.print(F("udp, uip_packet to send: "));
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Serial.println(UIPEthernetClass::uip_packet);
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#endif
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}
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UIPEthernetClass::network_send();
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}
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#endif
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