W5500-Ethernet-Interface Makers / W5500Interface

This is the Interface library for WIZnet W5500 chip which forked of EthernetInterfaceW5500, WIZnetInterface and WIZ550ioInterface. This library has simple name as "W5500Interface". and can be used for Wiz550io users also.

Dependents:   EvrythngApi Websocket_Ethernet_HelloWorld_W5500 Websocket_Ethernet_W5500 CurrentWeatherData_W5500 ... more

Information

It has EthernetInterface class like official EthernetInterface , but uses Wiznet chip driver codes.

So this library can use only the WIZnet W5500 or WIZ550io users.

This library has referred to many project such as WIZ550ioInterface, WiflyInterface and WIZnet Library.

Thanks all.

DHCPClient/DHCPClient.cpp@11:5499fa2d8898, 2015-04-28 (annotated)

Committer:
embeddist
Date:
Tue Apr 28 13:52:23 2015 +0000
Revision:
11:5499fa2d8898
Parent:
0:e11e8793c3ce 
Remove the setting of tx/rx buffer in SWReset

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bongjun 0:e11e8793c3ce 1 // DHCPClient.cpp 2013/4/10
Bongjun 0:e11e8793c3ce 2 #include "mbed.h"
Bongjun 0:e11e8793c3ce 3 #include "mbed_debug.h"
Bongjun 0:e11e8793c3ce 4 #include "UDPSocket.h"
Bongjun 0:e11e8793c3ce 5 #include "DHCPClient.h"
Bongjun 0:e11e8793c3ce 6
Bongjun 0:e11e8793c3ce 7 #define DBG_DHCP 0
Bongjun 0:e11e8793c3ce 8
Bongjun 0:e11e8793c3ce 9 #if DBG_DHCP
Bongjun 0:e11e8793c3ce 10 #define DBG(...) do{debug("[%s:%d]", __PRETTY_FUNCTION__,__LINE__);debug(__VA_ARGS__);} while(0);
Bongjun 0:e11e8793c3ce 11 #define DBG_HEX(A,B) do{debug("[%s:%d]\r\n", __PRETTY_FUNCTION__,__LINE__);debug_hex(A,B);} while(0);
Bongjun 0:e11e8793c3ce 12 #else
Bongjun 0:e11e8793c3ce 13 #define DBG(...) while(0);
Bongjun 0:e11e8793c3ce 14 #define DBG_HEX(A,B) while(0);
Bongjun 0:e11e8793c3ce 15 #endif
Bongjun 0:e11e8793c3ce 16
Bongjun 0:e11e8793c3ce 17 int DHCPClient::discover()
Bongjun 0:e11e8793c3ce 18 {
Bongjun 0:e11e8793c3ce 19 m_pos = 0;
Bongjun 0:e11e8793c3ce 20 const uint8_t header[] = {0x01,0x01,0x06,0x00};
Bongjun 0:e11e8793c3ce 21 add_buf((uint8_t*)header, sizeof(header));
Bongjun 0:e11e8793c3ce 22 uint32_t x = time(NULL) + rand();
Bongjun 0:e11e8793c3ce 23 xid[0] = x>>24; xid[1] = x>>16; xid[2] = x>>8; xid[3] = x;
Bongjun 0:e11e8793c3ce 24 add_buf(xid, 4);
Bongjun 0:e11e8793c3ce 25 fill_buf(20, 0x00);
Bongjun 0:e11e8793c3ce 26 add_buf(chaddr, 6);
Bongjun 0:e11e8793c3ce 27 fill_buf(10+192, 0x00);
Bongjun 0:e11e8793c3ce 28 const uint8_t options[] = {0x63,0x82,0x53,0x63, // magic cookie
Bongjun 0:e11e8793c3ce 29 53,1,DHCPDISCOVER, // DHCP option 53: DHCP Discover
Bongjun 0:e11e8793c3ce 30 55,4,1,3,15,6,
Bongjun 0:e11e8793c3ce 31 255};
Bongjun 0:e11e8793c3ce 32 add_buf((uint8_t*)options, sizeof(options));
Bongjun 0:e11e8793c3ce 33 return m_pos;
Bongjun 0:e11e8793c3ce 34 }
Bongjun 0:e11e8793c3ce 35
Bongjun 0:e11e8793c3ce 36 int DHCPClient::request()
Bongjun 0:e11e8793c3ce 37 {
Bongjun 0:e11e8793c3ce 38 m_pos = 0;
Bongjun 0:e11e8793c3ce 39 const uint8_t header[] = {0x01,0x01,0x06,0x00};
Bongjun 0:e11e8793c3ce 40 add_buf((uint8_t*)header, sizeof(header));
Bongjun 0:e11e8793c3ce 41 add_buf(xid, 4);
Bongjun 0:e11e8793c3ce 42 fill_buf(12, 0x00);
Bongjun 0:e11e8793c3ce 43 add_buf(siaddr, 4);
Bongjun 0:e11e8793c3ce 44 fill_buf(4, 0x00); // giaddr
Bongjun 0:e11e8793c3ce 45 add_buf(chaddr, 6);
Bongjun 0:e11e8793c3ce 46 fill_buf(10+192, 0x00);
Bongjun 0:e11e8793c3ce 47 const uint8_t options[] = {0x63,0x82,0x53,0x63, // magic cookie
Bongjun 0:e11e8793c3ce 48 53,1,DHCPREQUEST, // DHCP option 53: DHCP Request
Bongjun 0:e11e8793c3ce 49 55,4,1,3,15,6, // DHCP option 55:
Bongjun 0:e11e8793c3ce 50 };
Bongjun 0:e11e8793c3ce 51 add_buf((uint8_t*)options, sizeof(options));
Bongjun 0:e11e8793c3ce 52 add_option(50, yiaddr, 4);
Bongjun 0:e11e8793c3ce 53 add_option(54, siaddr, 4);
Bongjun 0:e11e8793c3ce 54 add_option(255);
Bongjun 0:e11e8793c3ce 55 return m_pos;
Bongjun 0:e11e8793c3ce 56 }
Bongjun 0:e11e8793c3ce 57
Bongjun 0:e11e8793c3ce 58 int DHCPClient::offer(uint8_t buf[], int size) {
Bongjun 0:e11e8793c3ce 59 memcpy(yiaddr, buf+DHCP_OFFSET_YIADDR, 4);
Bongjun 0:e11e8793c3ce 60 memcpy(siaddr, buf+DHCP_OFFSET_SIADDR, 4);
Bongjun 0:e11e8793c3ce 61 uint8_t *p;
Bongjun 0:e11e8793c3ce 62 int msg_type = -1;
Bongjun 0:e11e8793c3ce 63 p = buf + DHCP_OFFSET_OPTIONS;
Bongjun 0:e11e8793c3ce 64 while(*p != 255 && p < (buf+size)) {
Bongjun 0:e11e8793c3ce 65 uint8_t code = *p++;
Bongjun 0:e11e8793c3ce 66 if (code == 0) { // Pad Option
Bongjun 0:e11e8793c3ce 67 continue;
Bongjun 0:e11e8793c3ce 68 }
Bongjun 0:e11e8793c3ce 69 int len = *p++;
Bongjun 0:e11e8793c3ce 70
Bongjun 0:e11e8793c3ce 71 DBG("DHCP option: %d\r\n", code);
Bongjun 0:e11e8793c3ce 72 DBG_HEX(p, len);
Bongjun 0:e11e8793c3ce 73
Bongjun 0:e11e8793c3ce 74 switch(code) {
Bongjun 0:e11e8793c3ce 75 case 53:
Bongjun 0:e11e8793c3ce 76 msg_type = *p;
Bongjun 0:e11e8793c3ce 77 break;
Bongjun 0:e11e8793c3ce 78 case 1:
Bongjun 0:e11e8793c3ce 79 memcpy(netmask, p, 4); // Subnet mask address
Bongjun 0:e11e8793c3ce 80 break;
Bongjun 0:e11e8793c3ce 81 case 3:
Bongjun 0:e11e8793c3ce 82 memcpy(gateway, p, 4); // Gateway IP address
Bongjun 0:e11e8793c3ce 83 break;
Bongjun 0:e11e8793c3ce 84 case 6: // DNS server
Bongjun 0:e11e8793c3ce 85 memcpy(dnsaddr, p, 4);
Bongjun 0:e11e8793c3ce 86 break;
Bongjun 0:e11e8793c3ce 87 case 51: // IP lease time
Bongjun 0:e11e8793c3ce 88 break;
Bongjun 0:e11e8793c3ce 89 case 54: // DHCP server
Bongjun 0:e11e8793c3ce 90 memcpy(siaddr, p, 4);
Bongjun 0:e11e8793c3ce 91 break;
Bongjun 0:e11e8793c3ce 92 }
Bongjun 0:e11e8793c3ce 93 p += len;
Bongjun 0:e11e8793c3ce 94 }
Bongjun 0:e11e8793c3ce 95 return msg_type;
Bongjun 0:e11e8793c3ce 96 }
Bongjun 0:e11e8793c3ce 97
Bongjun 0:e11e8793c3ce 98 bool DHCPClient::verify(uint8_t buf[], int len) {
Bongjun 0:e11e8793c3ce 99 if (len < DHCP_OFFSET_OPTIONS) {
Bongjun 0:e11e8793c3ce 100 return false;
Bongjun 0:e11e8793c3ce 101 }
Bongjun 0:e11e8793c3ce 102 if (buf[DHCP_OFFSET_OP] != 0x02) {
Bongjun 0:e11e8793c3ce 103 return false;
Bongjun 0:e11e8793c3ce 104 }
Bongjun 0:e11e8793c3ce 105 if (memcmp(buf+DHCP_OFFSET_XID, xid, 4) != 0) {
Bongjun 0:e11e8793c3ce 106 return false;
Bongjun 0:e11e8793c3ce 107 }
Bongjun 0:e11e8793c3ce 108 return true;
Bongjun 0:e11e8793c3ce 109 }
Bongjun 0:e11e8793c3ce 110
Bongjun 0:e11e8793c3ce 111 void DHCPClient::callback()
Bongjun 0:e11e8793c3ce 112 {
Bongjun 0:e11e8793c3ce 113 Endpoint host;
Bongjun 0:e11e8793c3ce 114 int recv_len = m_udp->receiveFrom(host, (char*)m_buf, sizeof(m_buf));
Bongjun 0:e11e8793c3ce 115 if (recv_len < 0) {
Bongjun 0:e11e8793c3ce 116 return;
Bongjun 0:e11e8793c3ce 117 }
Bongjun 0:e11e8793c3ce 118 if (!verify(m_buf, recv_len)) {
Bongjun 0:e11e8793c3ce 119 return;
Bongjun 0:e11e8793c3ce 120 }
Bongjun 0:e11e8793c3ce 121 int r = offer(m_buf, recv_len);
Bongjun 0:e11e8793c3ce 122 if (r == DHCPOFFER) {
Bongjun 0:e11e8793c3ce 123 int send_size = request();
Bongjun 0:e11e8793c3ce 124 m_udp->sendTo(m_server, (char*)m_buf, send_size);
Bongjun 0:e11e8793c3ce 125 } else if (r == DHCPACK) {
Bongjun 0:e11e8793c3ce 126 exit_flag = true;
Bongjun 0:e11e8793c3ce 127 }
Bongjun 0:e11e8793c3ce 128 }
Bongjun 0:e11e8793c3ce 129
Bongjun 0:e11e8793c3ce 130 void DHCPClient::add_buf(uint8_t c)
Bongjun 0:e11e8793c3ce 131 {
Bongjun 0:e11e8793c3ce 132 m_buf[m_pos++] = c;
Bongjun 0:e11e8793c3ce 133 }
Bongjun 0:e11e8793c3ce 134
Bongjun 0:e11e8793c3ce 135 void DHCPClient::add_buf(uint8_t* buf, int len)
Bongjun 0:e11e8793c3ce 136 {
Bongjun 0:e11e8793c3ce 137 for(int i = 0; i < len; i++) {
Bongjun 0:e11e8793c3ce 138 add_buf(buf[i]);
Bongjun 0:e11e8793c3ce 139 }
Bongjun 0:e11e8793c3ce 140 }
Bongjun 0:e11e8793c3ce 141
Bongjun 0:e11e8793c3ce 142 void DHCPClient::fill_buf(int len, uint8_t data)
Bongjun 0:e11e8793c3ce 143 {
Bongjun 0:e11e8793c3ce 144 while(len-- > 0) {
Bongjun 0:e11e8793c3ce 145 add_buf(data);
Bongjun 0:e11e8793c3ce 146 }
Bongjun 0:e11e8793c3ce 147 }
Bongjun 0:e11e8793c3ce 148
Bongjun 0:e11e8793c3ce 149 void DHCPClient::add_option(uint8_t code, uint8_t* buf, int len)
Bongjun 0:e11e8793c3ce 150 {
Bongjun 0:e11e8793c3ce 151 add_buf(code);
Bongjun 0:e11e8793c3ce 152 if (len > 0) {
Bongjun 0:e11e8793c3ce 153 add_buf((uint8_t)len);
Bongjun 0:e11e8793c3ce 154 add_buf(buf, len);
Bongjun 0:e11e8793c3ce 155 }
Bongjun 0:e11e8793c3ce 156 }
Bongjun 0:e11e8793c3ce 157
Bongjun 0:e11e8793c3ce 158 int DHCPClient::setup(int timeout_ms)
Bongjun 0:e11e8793c3ce 159 {
Bongjun 0:e11e8793c3ce 160 eth = WIZnet_Chip::getInstance();
Bongjun 0:e11e8793c3ce 161 if (eth == NULL) {
Bongjun 0:e11e8793c3ce 162 return -1;
Bongjun 0:e11e8793c3ce 163 }
Bongjun 0:e11e8793c3ce 164 eth->reg_rd_mac(SHAR, chaddr);
Bongjun 0:e11e8793c3ce 165 int interval_ms = 5*1000; // 5000msec
Bongjun 0:e11e8793c3ce 166 if (timeout_ms < interval_ms) {
Bongjun 0:e11e8793c3ce 167 interval_ms = timeout_ms;
Bongjun 0:e11e8793c3ce 168 }
Bongjun 0:e11e8793c3ce 169 m_udp = new UDPSocket;
Bongjun 0:e11e8793c3ce 170 m_udp->init();
Bongjun 0:e11e8793c3ce 171 m_udp->set_blocking(false);
Bongjun 0:e11e8793c3ce 172 eth->reg_wr<uint32_t>(SIPR, 0x00000000); // local ip "0.0.0.0"
Bongjun 0:e11e8793c3ce 173 m_udp->bind(68); // local port
Bongjun 0:e11e8793c3ce 174 m_server.set_address("255.255.255.255", 67); // DHCP broadcast
Bongjun 0:e11e8793c3ce 175 exit_flag = false;
Bongjun 0:e11e8793c3ce 176 int err = 0;
Bongjun 0:e11e8793c3ce 177 int seq = 0;
Bongjun 0:e11e8793c3ce 178 int send_size;
Bongjun 0:e11e8793c3ce 179 while(!exit_flag) {
Bongjun 0:e11e8793c3ce 180 switch(seq) {
Bongjun 0:e11e8793c3ce 181 case 0:
Bongjun 0:e11e8793c3ce 182 m_retry = 0;
Bongjun 0:e11e8793c3ce 183 seq++;
Bongjun 0:e11e8793c3ce 184 break;
Bongjun 0:e11e8793c3ce 185 case 1:
Bongjun 0:e11e8793c3ce 186 send_size = discover();
Bongjun 0:e11e8793c3ce 187 m_udp->sendTo(m_server, (char*)m_buf, send_size);
Bongjun 0:e11e8793c3ce 188 m_interval.reset();
Bongjun 0:e11e8793c3ce 189 m_interval.start();
Bongjun 0:e11e8793c3ce 190 seq++;
Bongjun 0:e11e8793c3ce 191 break;
Bongjun 0:e11e8793c3ce 192 case 2:
Bongjun 0:e11e8793c3ce 193 callback();
Bongjun 0:e11e8793c3ce 194 if (m_interval.read_ms() > interval_ms) {
Bongjun 0:e11e8793c3ce 195 DBG("m_retry: %d\n", m_retry);
Bongjun 0:e11e8793c3ce 196 if (++m_retry >= (timeout_ms/interval_ms)) {
Bongjun 0:e11e8793c3ce 197 err = -1;
Bongjun 0:e11e8793c3ce 198 exit_flag = true;
Bongjun 0:e11e8793c3ce 199 }
Bongjun 0:e11e8793c3ce 200 seq--;
Bongjun 0:e11e8793c3ce 201 }
Bongjun 0:e11e8793c3ce 202 break;
Bongjun 0:e11e8793c3ce 203 }
Bongjun 0:e11e8793c3ce 204 }
Bongjun 0:e11e8793c3ce 205 DBG("m_retry: %d, m_interval: %d\n", m_retry, m_interval.read_ms());
Bongjun 0:e11e8793c3ce 206 delete m_udp;
Bongjun 0:e11e8793c3ce 207 return err;
Bongjun 0:e11e8793c3ce 208 }
Bongjun 0:e11e8793c3ce 209
Bongjun 0:e11e8793c3ce 210 DHCPClient::DHCPClient() {
Bongjun 0:e11e8793c3ce 211 }