mbed OS5
Fork of UIPEthernet by
UIPEthernet.cpp
- Committer:
- hudakz
- Date:
- 2017-06-30
- Revision:
- 8:4acb22344932
- Parent:
- 4:d774541a34da
File content as of revision 8:4acb22344932:
/* UIPEthernet.cpp - Arduino implementation of a UIP wrapper class. Copyright (c) 2013 Norbert Truchsess <norbert.truchsess@t-online.de> All rights reserved. Modified (ported to mbed) by Zoltan Hudak <hudakz@inbox.com> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "mbed.h" #include "UIPEthernet.h" #include "utility/Enc28J60Network.h" #include "UIPUdp.h" extern "C" { #include "utility/uip-conf.h" #include "utility/uip.h" #include "utility/uip_arp.h" #include "utility/uip_timer.h" #include "utility/millis.h" } #define ETH_HDR ((struct uip_eth_hdr*) &uip_buf[0]) memhandle UIPEthernet::in_packet(NOBLOCK); memhandle UIPEthernet::uip_packet(NOBLOCK); uint8_t UIPEthernet::uip_hdrlen(0); uint8_t UIPEthernet::packetstate(0); IPAddress UIPEthernet::_dnsServerAddress; DhcpClass* UIPEthernet::_dhcp(NULL); unsigned long UIPEthernet::periodic_timer; /** * @brief * @note * @param * @retval */ void enc28J60_mempool_block_move_callback(memaddress dest, memaddress src, memaddress len) { //as ENC28J60 DMA is unable to copy single bytes: if (len == 1) { uIPEthernet.network.writeByte(dest, uIPEthernet.network.readByte(src)); } else { // calculate address of last byte len += src - 1; /* 1. Appropriately program the EDMAST, EDMAND and EDMADST register pairs. The EDMAST registers should point to the first byte to copy from, the EDMAND registers should point to the last byte to copy and the EDMADST registers should point to the first byte in the destination range. The destination range will always be linear, never wrapping at any values except from 8191 to 0 (the 8-Kbyte memory boundary). Extreme care should be taken when programming the start and end pointers to prevent a never ending DMA operation which would overwrite the entire 8-Kbyte buffer. */ uIPEthernet.network.writeRegPair(EDMASTL, src); uIPEthernet.network.writeRegPair(EDMADSTL, dest); if ((src <= RXSTOP_INIT) && (len > RXSTOP_INIT)) len -= (RXSTOP_INIT - RXSTART_INIT); uIPEthernet.network.writeRegPair(EDMANDL, len); /* 2. If an interrupt at the end of the copy process is desired, set EIE.DMAIE and EIE.INTIE and clear EIR.DMAIF. 3. Verify that ECON1.CSUMEN is clear. */ uIPEthernet.network.writeOp(ENC28J60_BIT_FIELD_CLR, ECON1, ECON1_CSUMEN); /* 4. Start the DMA copy by setting ECON1.DMAST. */ uIPEthernet.network.writeOp(ENC28J60_BIT_FIELD_SET, ECON1, ECON1_DMAST); // wait until runnig DMA is completed while (uIPEthernet.network.readOp(ENC28J60_READ_CTRL_REG, ECON1) & ECON1_DMAST); } } /* * Because UIP isn't encapsulated within a class we have to use global * variables, so we can only have one TCP/IP stack per program. */ UIPEthernet::UIPEthernet(PinName mosi, PinName miso, PinName sck, PinName cs) : network(mosi, miso, sck, cs) { millis_start(); } #if UIP_UDP /** * @brief * @note * @param * @retval */ int UIPEthernet::begin(const uint8_t* mac) { static DhcpClass s_dhcp; _dhcp = &s_dhcp; // Initialise the basic info init(mac); // Now try to get our config info from a DHCP server int ret = _dhcp->beginWithDHCP((uint8_t*)mac); if (ret == 1) { // We've successfully found a DHCP server and got our configuration info, so set things // accordingly configure(_dhcp->getLocalIp(), _dhcp->getDnsServerIp(), _dhcp->getGatewayIp(), _dhcp->getSubnetMask()); } return ret; } #endif /** * @brief * @note * @param * @retval */ void UIPEthernet::begin(const uint8_t* mac, IPAddress ip) { IPAddress dns = ip; dns[3] = 1; begin(mac, ip, dns); } /** * @brief * @note * @param * @retval */ void UIPEthernet::begin(const uint8_t* mac, IPAddress ip, IPAddress dns) { IPAddress gateway = ip; gateway[3] = 1; begin(mac, ip, dns, gateway); } /** * @brief * @note * @param * @retval */ void UIPEthernet::begin(const uint8_t* mac, IPAddress ip, IPAddress dns, IPAddress gateway) { IPAddress subnet(255, 255, 255, 0); begin(mac, ip, dns, gateway, subnet); } /** * @brief * @note * @param * @retval */ void UIPEthernet::begin(const uint8_t* mac, IPAddress ip, IPAddress dns, IPAddress gateway, IPAddress subnet) { init(mac); configure(ip, dns, gateway, subnet); } /** * @brief * @note * @param * @retval */ int UIPEthernet::maintain(void) { tick(); int rc = DHCP_CHECK_NONE; #if UIP_UDP if (_dhcp != NULL) { //we have a pointer to dhcp, use it rc = _dhcp->checkLease(); switch (rc) { case DHCP_CHECK_NONE: //nothing done break; case DHCP_CHECK_RENEW_OK: case DHCP_CHECK_REBIND_OK: //we might have got a new IP. configure(_dhcp->getLocalIp(), _dhcp->getDnsServerIp(), _dhcp->getGatewayIp(), _dhcp->getSubnetMask()); break; default: //this is actually an error, it will retry though break; } } return rc; #endif } /** * @brief * @note * @param * @retval */ IPAddress UIPEthernet::localIP(void) { uip_ipaddr_t a; uip_gethostaddr(a); return ip_addr_uip(a); } /** * @brief * @note * @param * @retval */ IPAddress UIPEthernet::subnetMask(void) { uip_ipaddr_t a; uip_getnetmask(a); return ip_addr_uip(a); } /** * @brief * @note * @param * @retval */ IPAddress UIPEthernet::gatewayIP(void) { uip_ipaddr_t a; uip_getdraddr(a); return ip_addr_uip(a); } /** * @brief * @note * @param * @retval */ IPAddress UIPEthernet::dnsServerIP(void) { return _dnsServerAddress; } /** * @brief * @note * @param * @retval */ void UIPEthernet::tick(void) { if (in_packet == NOBLOCK) { in_packet = network.receivePacket(); #ifdef UIPETHERNET_DEBUG if (in_packet != NOBLOCK) { printf("--------------\r\nreceivePacket: %d\r\n", in_packet); } #endif } if (in_packet != NOBLOCK) { packetstate = UIPETHERNET_FREEPACKET; uip_len = network.blockSize(in_packet); if (uip_len > 0) { network.readPacket(in_packet, 0, (uint8_t*)uip_buf, UIP_BUFSIZE); if (ETH_HDR->type == HTONS(UIP_ETHTYPE_IP)) { uip_packet = in_packet; //required for upper_layer_checksum of in_packet! #ifdef UIPETHERNET_DEBUG printf("readPacket type IP, uip_len: %d\r\n", uip_len); #endif uip_arp_ipin(); uip_input(); if (uip_len > 0) { uip_arp_out(); network_send(); } } else if (ETH_HDR->type == HTONS(UIP_ETHTYPE_ARP)) { #ifdef UIPETHERNET_DEBUG printf("readPacket type ARP, uip_len: %d\r\n", uip_len); #endif uip_arp_arpin(); if (uip_len > 0) { network_send(); } } } if (in_packet != NOBLOCK && (packetstate & UIPETHERNET_FREEPACKET)) { #ifdef UIPETHERNET_DEBUG printf("freeing packet: %d\r\n", in_packet); #endif network.freePacket(); in_packet = NOBLOCK; } } unsigned long now = millis(); bool periodic = (long)(now - periodic_timer) >= 0; for (int i = 0; i < UIP_CONNS; i++) { uip_conn = &uip_conns[i]; if (periodic) { uip_process(UIP_TIMER); } else { if ((long)(now - ((uip_userdata_t*)uip_conn->appstate)->timer) >= 0) uip_process(UIP_POLL_REQUEST); else continue; } // If the above function invocation resulted in data that // should be sent out on the Enc28J60Network, the global variable // uip_len is set to a value > 0. if (uip_len > 0) { uip_arp_out(); network_send(); } } if (periodic) { periodic_timer = now + UIP_PERIODIC_TIMER; #if UIP_UDP for (int i = 0; i < UIP_UDP_CONNS; i++) { uip_udp_periodic(i); // If the above function invocation resulted in data that // should be sent out on the Enc28J60Network, the global variable // uip_len is set to a value > 0. if (uip_len > 0) { UIPUDP::_send((uip_udp_userdata_t *) (uip_udp_conns[i].appstate)); } } #endif // UIP_UDP } } /** * @brief * @note * @param * @retval */ bool UIPEthernet::network_send(void) { if (packetstate & UIPETHERNET_SENDPACKET) { #ifdef UIPETHERNET_DEBUG printf("Enc28J60Network_send uip_packet: %d, hdrlen: %d\r\n", uip_packet, uip_hdrlen); #endif uIPEthernet.network.writePacket(uip_packet, 0, uip_buf, uip_hdrlen); packetstate &= ~UIPETHERNET_SENDPACKET; goto sendandfree; } uip_packet = Enc28J60Network::allocBlock(uip_len); if (uip_packet != NOBLOCK) { #ifdef UIPETHERNET_DEBUG printf("Enc28J60Network_send uip_buf (uip_len): %d, packet: %d\r\n", uip_len, uip_packet); #endif uIPEthernet.network.writePacket(uip_packet, 0, uip_buf, uip_len); goto sendandfree; } return false; sendandfree: network.sendPacket(uip_packet); Enc28J60Network::freeBlock(uip_packet); uip_packet = NOBLOCK; return true; } /** * @brief * @note * @param * @retval */ void UIPEthernet::init(const uint8_t* mac) { periodic_timer = millis() + UIP_PERIODIC_TIMER; network.init((uint8_t*)mac); uip_seteth_addr(mac); uip_init(); uip_arp_init(); } /** * @brief * @note * @param * @retval */ void UIPEthernet::configure(IPAddress ip, IPAddress dns, IPAddress gateway, IPAddress subnet) { uip_ipaddr_t ipaddr; uip_ip_addr(ipaddr, ip); uip_sethostaddr(ipaddr); uip_ip_addr(ipaddr, gateway); uip_setdraddr(ipaddr); uip_ip_addr(ipaddr, subnet); uip_setnetmask(ipaddr); _dnsServerAddress = dns; } /** * @brief * @note * @param * @retval */ uint16_t UIPEthernet::chksum(uint16_t sum, const uint8_t* data, uint16_t len) { uint16_t t; const uint8_t* dataptr; const uint8_t* last_byte; dataptr = data; last_byte = data + len - 1; while (dataptr < last_byte) { /* At least two more bytes */ t = (dataptr[0] << 8) + dataptr[1]; sum += t; if (sum < t) { sum++; /* carry */ } dataptr += 2; } if (dataptr == last_byte) { t = (dataptr[0] << 8) + 0; sum += t; if (sum < t) { sum++; /* carry */ } } /* Return sum in host byte order. */ return sum; } /** * @brief * @note * @param * @retval */ uint16_t UIPEthernet::ipchksum(void) { uint16_t sum; sum = chksum(0, &uip_buf[UIP_LLH_LEN], UIP_IPH_LEN); return(sum == 0) ? 0xffff : htons(sum); } uint16_t #if UIP_UDP UIPEthernet::upper_layer_chksum(uint8_t proto) #else uip_tcpchksum (void) #endif { uint16_t upper_layer_len; uint16_t sum; #if UIP_CONF_IPV6 upper_layer_len = (((u16_t) (BUF->len[0]) << 8) + BUF->len[1]); #else /* UIP_CONF_IPV6 */ upper_layer_len = (((u16_t) (BUF->len[0]) << 8) + BUF->len[1]) - UIP_IPH_LEN; #endif /* UIP_CONF_IPV6 */ /* First sum pseudoheader. */ /* IP protocol and length fields. This addition cannot carry. */ #if UIP_UDP sum = upper_layer_len + proto; #else sum = upper_layer_len + UIP_PROTO_TCP; #endif /* Sum IP source and destination addresses. */ sum = UIPEthernet::chksum(sum, (u8_t*) &BUF->srcipaddr[0], 2 * sizeof(uip_ipaddr_t)); uint8_t upper_layer_memlen; #if UIP_UDP switch (proto) { // case UIP_PROTO_ICMP: // case UIP_PROTO_ICMP6: // upper_layer_memlen = upper_layer_len; // break; case UIP_PROTO_UDP: upper_layer_memlen = UIP_UDPH_LEN; break; default: // case UIP_PROTO_TCP: #endif upper_layer_memlen = (BUF->tcpoffset >> 4) << 2; #if UIP_UDP break; } #endif sum = UIPEthernet::chksum(sum, &uip_buf[UIP_IPH_LEN + UIP_LLH_LEN], upper_layer_memlen); #ifdef UIPETHERNET_DEBUG_CHKSUM printf("chksum uip_buf[%d-%d]: %d\r\n", UIP_IPH_LEN + UIP_LLH_LEN, UIP_IPH_LEN + UIP_LLH_LEN + upper_layer_memlen, htons(sum)); #endif if (upper_layer_memlen < upper_layer_len) { sum = network.chksum ( sum, UIPEthernet::uip_packet, UIP_IPH_LEN + UIP_LLH_LEN + upper_layer_memlen, upper_layer_len - upper_layer_memlen ); #ifdef UIPETHERNET_DEBUG_CHKSUM printf("chksum uip_packet(%d)[%d-%d]: %d\r\n", uip_packet, UIP_IPH_LEN + UIP_LLH_LEN + upper_layer_memlen, UIP_IPH_LEN + UIP_LLH_LEN + upper_layer_len, htons(sum)); #endif } return(sum == 0) ? 0xffff : htons(sum); } /** * @brief * @note * @param * @retval */ uint16_t uip_ipchksum(void) { return uIPEthernet.ipchksum(); } #if UIP_UDP /** * @brief * @note * @param * @retval */ uint16_t uip_tcpchksum(void) { uint16_t sum = uIPEthernet.upper_layer_chksum(UIP_PROTO_TCP); return sum; } /** * @brief * @note * @param * @retval */ uint16_t uip_udpchksum(void) { uint16_t sum = uIPEthernet.upper_layer_chksum(UIP_PROTO_UDP); return sum; } #endif