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353 |
rhoads |
/*--------------------------------------------------------------------
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* TITLE: Plasma TCP/IP Protocol Stack
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* AUTHOR: Steve Rhoads (rhoadss@yahoo.com)
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* DATE CREATED: 4/22/06
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* FILENAME: tcpip.c
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* PROJECT: Plasma CPU core
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* COPYRIGHT: Software placed into the public domain by the author.
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* Software 'as is' without warranty. Author liable for nothing.
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* DESCRIPTION:
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* Plasma TCP/IP Protocol Stack
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*
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* Possible call stack when receiving a packet:
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* IPMainThread()
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* IPProcessEthernetPacket()
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* IPProcessTCPPacket()
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* TCPSendPacket()
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* IPSendPacket()
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* IPChecksum()
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* IPSendFrame()
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* FrameInsert()
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*--------------------------------------------------------------------*/
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#ifdef WIN32
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#define _LIBC
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#endif
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#include "rtos.h"
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#define IPPRINTF
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#include "tcpip.h"
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//ETHER FIELD OFFSET LENGTH VALUE
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#define ETHERNET_DEST 0 //6
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#define ETHERNET_SOURCE 6 //6
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#define ETHERNET_FRAME_TYPE 12 //2 IP=0x0800; ARP=0x0806
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//ARP FIELD OFFSET LENGTH VALUE
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#define ARP_HARD_TYPE 14 //2 0x0001
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#define ARP_PROT_TYPE 16 //2 0x0800
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#define ARP_HARD_SIZE 18 //1 0x06
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#define ARP_PROT_SIZE 19 //1 0x04
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#define ARP_OP 20 //2 ARP=1;ARPreply=2
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#define ARP_ETHERNET_SENDER 22 //6
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#define ARP_IP_SENDER 28 //4
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#define ARP_ETHERNET_TARGET 32 //6
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#define ARP_IP_TARGET 38 //4
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#define ARP_PAD 42 //18 0
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//IP FIELD OFFSET LENGTH VALUE
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#define IP_VERSION_LENGTH 14 //1 0x45
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#define IP_TYPE_OF_SERVICE 15 //1 0x00
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#define IP_LENGTH 16 //2
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#define IP_ID16 18 //2
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#define IP_FRAG_OFFSET 20 //2
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#define IP_TIME_TO_LIVE 22 //1 0x80
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#define IP_PROTOCOL 23 //1 TCP=0x06;PING=0x01;UDP=0x11
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#define IP_CHECKSUM 24 //2
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#define IP_SOURCE 26 //4
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#define IP_DEST 30 //4
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//PSEUDO FIELD OFFSET LENGTH VALUE
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#define PSEUDO_IP_SOURCE 0 //4
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#define PSEUDO_IP_DEST 4 //4
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#define PSEUDO_ZERO 8 //1 0
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#define PSEUDO_IP_PROTOCOL 9 //1
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#define PSEUDO_LENGTH 10 //2
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//UDP FIELD OFFSET LENGTH VALUE
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#define UDP_SOURCE_PORT 34 //2
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#define UDP_DEST_PORT 36 //2
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#define UDP_LENGTH 38 //2
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#define UDP_CHECKSUM 40 //2
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#define UDP_DATA 42
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//DHCP FIELD OFFSET LENGTH VALUE
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#define DHCP_OPCODE 42 //1 REQUEST=1;REPLY=2
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#define DHCP_HW_TYPE 43 //1 1
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#define DHCP_HW_LEN 44 //1 6
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#define DHCP_HOP_COUNT 45 //1 0
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#define DHCP_TRANS_ID 46 //4
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#define DHCP_NUM_SEC 50 //2 0
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#define DHCP_UNUSED 52 //2
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#define DHCP_CLIENT_IP 54 //4
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#define DHCP_YOUR_IP 58 //4
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#define DHCP_SERVER_IP 62 //4
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#define DHCP_GATEWAY_IP 66 //4
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#define DHCP_CLIENT_ETHERNET 70 //16
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#define DHCP_SERVER_NAME 86 //64
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#define DHCP_BOOT_FILENAME 150 //128
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#define DHCP_MAGIC_COOKIE 278 //4 0x63825363
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#define DHCP_OPTIONS 282 //N
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#define DHCP_MESSAGE_TYPE 53 //1 type
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#define DHCP_DISCOVER 1
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#define DHCP_OFFER 2
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#define DHCP_REQUEST 3
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#define DHCP_ACK 5
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#define DHCP_REQUEST_IP 50 //4 ip
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#define DHCP_REQUEST_SERV_IP 54 //4 ip
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#define DHCP_CLIENT_ID 61 //7 1 ethernet
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#define DHCP_HOST_NAME 12 //6 plasma
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#define DHCP_PARAMS 55 //4 1=subnet; 15=domain_name; 3=router; 6=dns
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#define DHCP_PARAM_SUBNET 1
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#define DHCP_PARAM_ROUTER 3
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#define DHCP_PARAM_DNS 6
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#define DHCP_END_OPTION 0xff
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//DHCP FIELD OFFSET LENGTH VALUE
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#define DNS_ID 0 //2
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#define DNS_FLAGS 2 //2
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#define DNS_NUM_QUESTIONS 4 //2 1
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#define DNS_NUM_ANSWERS_RR 6 //2 0/1
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#define DNS_NUM_AUTHORITY_RR 8 //2 0
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#define DNS_NUM_ADDITIONAL_RR 10 //2 0
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#define DNS_QUESTIONS 12 //2
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#define DNS_FLAGS_RESPONSE 0x8000
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#define DNS_FLAGS_RECURSIVE 0x0100
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#define DNS_FLAGS_ERROR 0x0003
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#define DNS_FLAGS_OK 0x0000
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#define DNS_QUERY_TYPE_IP 1
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#define DNS_QUERY_CLASS 1
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#define DNS_PORT 53
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//TCP FIELD OFFSET LENGTH VALUE
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#define TCP_SOURCE_PORT 34 //2
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#define TCP_DEST_PORT 36 //2
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#define TCP_SEQ 38 //4
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#define TCP_ACK 42 //4
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#define TCP_HEADER_LENGTH 46 //1 0x50
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#define TCP_FLAGS 47 //1 SYNC=0x2;ACK=0x10;FIN=0x1
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#define TCP_WINDOW_SIZE 48 //2
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#define TCP_CHECKSUM 50 //2
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#define TCP_URGENT_POINTER 52 //2
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#define TCP_DATA 54 //length-N
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#define TCP_FLAGS_FIN 1
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#define TCP_FLAGS_SYN 2
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#define TCP_FLAGS_RST 4
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#define TCP_FLAGS_PSH 8
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#define TCP_FLAGS_ACK 16
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//PING FIELD OFFSET LENGTH VALUE
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#define PING_TYPE 34 //1 SEND=8;REPLY=0
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#define PING_CODE 35 //1 0
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#define PING_CHECKSUM 36 //2
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#define PING_ID 38 //2
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#define PING_SEQUENCE 40 //2
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#define PING_DATA 44
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static void IPClose2(IPSocket *Socket);
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static uint8 ethernetAddressGateway[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
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#ifndef WIN32
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static uint8 ethernetAddressPlasma[] = {0x00, 0x10, 0xdd, 0xce, 0x15, 0xd4};
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#else
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static uint8 ethernetAddressPlasma[] = {0x00, 0x10, 0xdd, 0xce, 0x15, 0xd5};
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#endif
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static uint8 ipAddressPlasma[] = {0x9d, 0xfe, 0x28, 10}; //changed by DHCP
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static uint8 ipAddressGateway[] = {0xff, 0xff, 0xff, 0xff}; //changed by DHCP
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static uint32 ipAddressDns; //changed by DHCP
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static OS_Mutex_t *IPMutex;
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static int FrameFreeCount;
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static IPFrame *FrameFreeHead;
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static IPFrame *FrameSendHead;
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static IPFrame *FrameSendTail;
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static IPFrame *FrameResendHead;
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static IPFrame *FrameResendTail;
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static IPSocket *SocketHead;
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static uint32 Seconds;
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static int DhcpRetrySeconds;
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static IPFuncPtr FrameSendFunc;
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static OS_MQueue_t *IPMQueue;
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static OS_Thread_t *IPThread;
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int IPVerbose=1;
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static const unsigned char dhcpDiscover[] = {
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, //dest
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0x00, 0x10, 0xdd, 0xce, 0x15, 0xd4, //src
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0x08, 0x00,
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0x45, 0x00, 0x01, 0x48, 0x2e, 0xf5, 0x00, 0x00, //ip
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0x80, 0x11, 0x0a, 0xb1, 0x00, 0x00, 0x00, 0x00,
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0xff, 0xff, 0xff, 0xff,
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0x00, 0x44, 0x00, 0x43, 0x01, 0x34, 0x45, 0x66, //udp
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0x01, 0x01, 0x06, 0x00, 0x69, 0x26, 0xb5, 0x52 //dhcp
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};
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static unsigned char dhcpOptions[] = {
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0x63, 0x82, 0x53, 0x63, //cookie
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0x35, 0x01, 0x01, //DHCP Discover
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0x3d, 0x07, 0x01, 0x00, 0x10, 0xdd, 0xce, 0x15, 0xd4, //Client identifier
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#ifndef WIN32
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0x0c, 0x06, 'p', 'l', 'a', 's', 'm', 'a', //Host name
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#else
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0x0c, 0x06, 'p', 'l', 'a', 's', 'm', 'b', //Host name
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#endif
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0x37, 0x03, DHCP_PARAM_SUBNET, DHCP_PARAM_ROUTER, DHCP_PARAM_DNS, //Parameters
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DHCP_END_OPTION
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};
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//Get a free frame; can be called from an ISR
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IPFrame *IPFrameGet(int freeCount)
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{
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IPFrame *frame=NULL;
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uint32 state;
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state = OS_CriticalBegin();
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if(FrameFreeCount > freeCount)
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{
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frame = FrameFreeHead;
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if(FrameFreeHead)
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{
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FrameFreeHead = FrameFreeHead->next;
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--FrameFreeCount;
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}
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}
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OS_CriticalEnd(state);
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if(frame)
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{
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assert(frame->state == 0);
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frame->state = 1;
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}
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return frame;
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}
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static void FrameFree(IPFrame *frame)
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{
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uint32 state;
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assert(frame->state == 1);
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frame->state = 0;
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state = OS_CriticalBegin();
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frame->next = FrameFreeHead;
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FrameFreeHead = frame;
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++FrameFreeCount;
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OS_CriticalEnd(state);
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}
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| 246 |
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static void FrameInsert(IPFrame **head, IPFrame **tail, IPFrame *frame)
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{
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assert(frame->state == 1);
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frame->state = 2;
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OS_MutexPend(IPMutex);
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frame->prev = NULL;
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frame->next = *head;
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if(*head)
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(*head)->prev = frame;
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*head = frame;
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if(*tail == NULL)
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*tail = frame;
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OS_MutexPost(IPMutex);
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}
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| 262 |
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static void FrameRemove(IPFrame **head, IPFrame **tail, IPFrame *frame)
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{
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assert(frame->state == 2);
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frame->state = 1;
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if(frame->prev)
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frame->prev->next = frame->next;
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else
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*head = frame->next;
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if(frame->next)
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frame->next->prev = frame->prev;
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else
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*tail = frame->prev;
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frame->prev = NULL;
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frame->next = NULL;
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}
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| 278 |
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| 279 |
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static int IPChecksum(int checksum, const unsigned char *data, int length)
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| 280 |
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{
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| 281 |
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int i;
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| 282 |
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checksum = ~checksum & 0xffff;
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for(i = 0; i < length-1; i += 2)
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{
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checksum += (data[i] << 8) | data[i+1];
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}
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| 287 |
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if(i < length)
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checksum += data[i] << 8;
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while(checksum >> 16)
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checksum = (checksum & 0xffff) + (checksum >> 16);
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checksum = ~checksum & 0xffff;
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return checksum;
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| 293 |
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}
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| 294 |
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| 295 |
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| 296 |
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static int EthernetVerifyChecksums(const unsigned char *packet, int length)
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| 297 |
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{
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| 298 |
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int checksum, length2;
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| 299 |
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unsigned char pseudo[12];
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| 300 |
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| 301 |
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//Calculate checksums
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if(packet[ETHERNET_FRAME_TYPE+1] == 0x00) //IP
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{
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checksum = IPChecksum(0xffff, packet+IP_VERSION_LENGTH, 20);
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if(checksum)
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return -1;
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if(packet[IP_PROTOCOL] == 0x01) //PING
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{
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| 309 |
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checksum = IPChecksum(0xffff, packet+PING_TYPE, length-PING_TYPE);
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}
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| 311 |
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else if(packet[IP_PROTOCOL] == 0x11) //UDP
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{
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| 313 |
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if(packet[UDP_CHECKSUM] == 0 && packet[UDP_CHECKSUM+1] == 0)
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| 314 |
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return 0;
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memcpy(pseudo+PSEUDO_IP_SOURCE, packet+IP_SOURCE, 4);
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memcpy(pseudo+PSEUDO_IP_DEST, packet+IP_DEST, 4);
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| 317 |
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pseudo[PSEUDO_ZERO] = 0;
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| 318 |
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pseudo[PSEUDO_IP_PROTOCOL] = packet[IP_PROTOCOL];
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| 319 |
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memcpy(pseudo+PSEUDO_LENGTH, packet+UDP_LENGTH, 2);
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| 320 |
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checksum = IPChecksum(0xffff, pseudo, 12);
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| 321 |
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length2 = (packet[UDP_LENGTH] << 8) + packet[UDP_LENGTH+1];
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| 322 |
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checksum = IPChecksum(checksum, packet+UDP_SOURCE_PORT, length);
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| 323 |
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}
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|
|
else if(packet[IP_PROTOCOL] == 0x06) //TCP
|
| 325 |
|
|
{
|
| 326 |
|
|
memcpy(pseudo+PSEUDO_IP_SOURCE, packet+IP_SOURCE, 4);
|
| 327 |
|
|
memcpy(pseudo+PSEUDO_IP_DEST, packet+IP_DEST, 4);
|
| 328 |
|
|
pseudo[PSEUDO_ZERO] = 0;
|
| 329 |
|
|
pseudo[PSEUDO_IP_PROTOCOL] = packet[IP_PROTOCOL];
|
| 330 |
|
|
length = (packet[IP_LENGTH] << 8) + packet[IP_LENGTH+1];
|
| 331 |
|
|
length2 = length - 20;
|
| 332 |
|
|
pseudo[PSEUDO_LENGTH] = (unsigned char)(length2 >> 8);
|
| 333 |
|
|
pseudo[PSEUDO_LENGTH+1] = (unsigned char)length2;
|
| 334 |
|
|
checksum = IPChecksum(0xffff, pseudo, 12);
|
| 335 |
|
|
checksum = IPChecksum(checksum, packet+TCP_SOURCE_PORT, length2);
|
| 336 |
|
|
}
|
| 337 |
|
|
if(checksum)
|
| 338 |
|
|
return -1;
|
| 339 |
|
|
}
|
| 340 |
|
|
return 0;
|
| 341 |
|
|
}
|
| 342 |
|
|
|
| 343 |
|
|
|
| 344 |
|
|
static void IPFrameReschedule(IPFrame *frame)
|
| 345 |
|
|
{
|
| 346 |
|
|
int length;
|
| 347 |
|
|
length = frame->length - TCP_DATA;
|
| 348 |
|
|
if(frame->packet[TCP_FLAGS] & (TCP_FLAGS_FIN | TCP_FLAGS_SYN))
|
| 349 |
|
|
++length;
|
| 350 |
|
|
if(frame->socket == NULL || frame->socket->state == IP_UDP || length == 0 ||
|
| 351 |
|
|
frame->socket->state == IP_PING || ++frame->retryCnt > 4)
|
| 352 |
|
|
{
|
| 353 |
|
|
FrameFree(frame); //can't be ACK'ed
|
| 354 |
|
|
}
|
| 355 |
|
|
#ifdef WIN32
|
| 356 |
|
|
else if(FrameFreeCount < FRAME_COUNT_SYNC)
|
| 357 |
|
|
{
|
| 358 |
|
|
FrameFree(frame); //can't be ACK'ed
|
| 359 |
|
|
}
|
| 360 |
|
|
#endif
|
| 361 |
|
|
else
|
| 362 |
|
|
{
|
| 363 |
|
|
//Put on resend list until TCP ACK'ed
|
| 364 |
|
|
frame->timeout = (short)(RETRANSMIT_TIME * frame->retryCnt);
|
| 365 |
|
|
FrameInsert(&FrameResendHead, &FrameResendTail, frame);
|
| 366 |
|
|
}
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
|
| 370 |
|
|
static void IPSendFrame(IPFrame *frame)
|
| 371 |
|
|
{
|
| 372 |
|
|
uint32 message[4];
|
| 373 |
|
|
|
| 374 |
|
|
if(FrameSendFunc)
|
| 375 |
|
|
{
|
| 376 |
|
|
//Single threaded
|
| 377 |
|
|
FrameSendFunc(frame->packet, frame->length);
|
| 378 |
|
|
IPFrameReschedule(frame);
|
| 379 |
|
|
}
|
| 380 |
|
|
else
|
| 381 |
|
|
{
|
| 382 |
|
|
//Add Packet to send queue
|
| 383 |
|
|
FrameInsert(&FrameSendHead, &FrameSendTail, frame);
|
| 384 |
|
|
|
| 385 |
|
|
//Wakeup sender thread
|
| 386 |
|
|
message[0] = 2;
|
| 387 |
|
|
OS_MQueueSend(IPMQueue, message);
|
| 388 |
|
|
}
|
| 389 |
|
|
}
|
| 390 |
|
|
|
| 391 |
|
|
|
| 392 |
|
|
static void IPSendPacket(IPSocket *socket, IPFrame *frame, int length)
|
| 393 |
|
|
{
|
| 394 |
|
|
int checksum, length2=length;
|
| 395 |
|
|
unsigned char pseudo[12], *packet=frame->packet;
|
| 396 |
|
|
|
| 397 |
|
|
frame->length = (uint16)length;
|
| 398 |
|
|
|
| 399 |
|
|
//Calculate checksums
|
| 400 |
|
|
if(packet[ETHERNET_FRAME_TYPE+1] == 0x00) //IP
|
| 401 |
|
|
{
|
| 402 |
|
|
length2 = length - IP_VERSION_LENGTH;
|
| 403 |
|
|
packet[IP_LENGTH] = (uint8)(length2 >> 8);
|
| 404 |
|
|
packet[IP_LENGTH+1] = (uint8)length2;
|
| 405 |
|
|
memset(packet+IP_CHECKSUM, 0, 2);
|
| 406 |
|
|
checksum = IPChecksum(0xffff, packet+IP_VERSION_LENGTH, 20);
|
| 407 |
|
|
packet[IP_CHECKSUM] = (unsigned char)(checksum >> 8);
|
| 408 |
|
|
packet[IP_CHECKSUM+1] = (unsigned char)checksum;
|
| 409 |
|
|
if(packet[IP_PROTOCOL] == 0x01) //ICMP & PING
|
| 410 |
|
|
{
|
| 411 |
|
|
memset(packet+PING_CHECKSUM, 0, 2);
|
| 412 |
|
|
checksum = IPChecksum(0xffff, packet+PING_TYPE, length-PING_TYPE);
|
| 413 |
|
|
packet[PING_CHECKSUM] = (unsigned char)(checksum >> 8);
|
| 414 |
|
|
packet[PING_CHECKSUM+1] = (unsigned char)checksum;
|
| 415 |
|
|
}
|
| 416 |
|
|
else if(packet[IP_PROTOCOL] == 0x11) //UDP
|
| 417 |
|
|
{
|
| 418 |
|
|
length2 = length - UDP_SOURCE_PORT;
|
| 419 |
|
|
packet[UDP_LENGTH] = (uint8)(length2 >> 8);
|
| 420 |
|
|
packet[UDP_LENGTH+1] = (uint8)length2;
|
| 421 |
|
|
memcpy(pseudo+PSEUDO_IP_SOURCE, packet+IP_SOURCE, 4);
|
| 422 |
|
|
memcpy(pseudo+PSEUDO_IP_DEST, packet+IP_DEST, 4);
|
| 423 |
|
|
pseudo[PSEUDO_ZERO] = 0;
|
| 424 |
|
|
pseudo[PSEUDO_IP_PROTOCOL] = packet[IP_PROTOCOL];
|
| 425 |
|
|
memcpy(pseudo+PSEUDO_LENGTH, packet+UDP_LENGTH, 2);
|
| 426 |
|
|
checksum = IPChecksum(0xffff, pseudo, 12);
|
| 427 |
|
|
memset(packet+UDP_CHECKSUM, 0, 2);
|
| 428 |
|
|
length2 = (packet[UDP_LENGTH] << 8) + packet[UDP_LENGTH+1];
|
| 429 |
|
|
checksum = IPChecksum(checksum, packet+UDP_SOURCE_PORT, length2);
|
| 430 |
|
|
packet[UDP_CHECKSUM] = (unsigned char)(checksum >> 8);
|
| 431 |
|
|
packet[UDP_CHECKSUM+1] = (unsigned char)checksum;
|
| 432 |
|
|
}
|
| 433 |
|
|
else if(packet[IP_PROTOCOL] == 0x06) //TCP
|
| 434 |
|
|
{
|
| 435 |
|
|
memcpy(pseudo+PSEUDO_IP_SOURCE, packet+IP_SOURCE, 4);
|
| 436 |
|
|
memcpy(pseudo+PSEUDO_IP_DEST, packet+IP_DEST, 4);
|
| 437 |
|
|
pseudo[PSEUDO_ZERO] = 0;
|
| 438 |
|
|
pseudo[PSEUDO_IP_PROTOCOL] = packet[IP_PROTOCOL];
|
| 439 |
|
|
length2 = (packet[IP_LENGTH] << 8) + packet[IP_LENGTH+1];
|
| 440 |
|
|
length2 = length2 - 20;
|
| 441 |
|
|
pseudo[PSEUDO_LENGTH] = (unsigned char)(length2 >> 8);
|
| 442 |
|
|
pseudo[PSEUDO_LENGTH+1] = (unsigned char)length2;
|
| 443 |
|
|
checksum = IPChecksum(0xffff, pseudo, 12);
|
| 444 |
|
|
memset(packet+TCP_CHECKSUM, 0, 2);
|
| 445 |
|
|
checksum = IPChecksum(checksum, packet+TCP_SOURCE_PORT, length2);
|
| 446 |
|
|
packet[TCP_CHECKSUM] = (unsigned char)(checksum >> 8);
|
| 447 |
|
|
packet[TCP_CHECKSUM+1] = (unsigned char)checksum;
|
| 448 |
|
|
}
|
| 449 |
|
|
}
|
| 450 |
|
|
|
| 451 |
|
|
length2 = length - TCP_DATA;
|
| 452 |
|
|
if(socket && (packet[TCP_FLAGS] & (TCP_FLAGS_FIN | TCP_FLAGS_SYN)))
|
| 453 |
|
|
length2 = 1;
|
| 454 |
|
|
frame->socket = socket;
|
| 455 |
|
|
frame->timeout = 0;
|
| 456 |
|
|
frame->retryCnt = 0;
|
| 457 |
|
|
if(socket)
|
| 458 |
|
|
frame->seqEnd = socket->seq + length2;
|
| 459 |
|
|
IPSendFrame(frame);
|
| 460 |
|
|
}
|
| 461 |
|
|
|
| 462 |
|
|
|
| 463 |
|
|
static void TCPSendPacket(IPSocket *socket, IPFrame *frame, int length)
|
| 464 |
|
|
{
|
| 465 |
|
|
uint8 *packet = frame->packet;
|
| 466 |
|
|
int flags, count;
|
| 467 |
|
|
|
| 468 |
|
|
flags = packet[TCP_FLAGS];
|
| 469 |
|
|
memcpy(packet, socket->headerSend, TCP_SEQ);
|
| 470 |
|
|
packet[TCP_FLAGS] = (uint8)flags;
|
| 471 |
|
|
if(flags & TCP_FLAGS_SYN)
|
| 472 |
|
|
packet[TCP_HEADER_LENGTH] = 0x60; //set maximum segment size
|
| 473 |
|
|
else
|
| 474 |
|
|
packet[TCP_HEADER_LENGTH] = 0x50;
|
| 475 |
|
|
packet[TCP_SEQ] = (uint8)(socket->seq >> 24);
|
| 476 |
|
|
packet[TCP_SEQ+1] = (uint8)(socket->seq >> 16);
|
| 477 |
|
|
packet[TCP_SEQ+2] = (uint8)(socket->seq >> 8);
|
| 478 |
|
|
packet[TCP_SEQ+3] = (uint8)socket->seq;
|
| 479 |
|
|
packet[TCP_ACK] = (uint8)(socket->ack >> 24);
|
| 480 |
|
|
packet[TCP_ACK+1] = (uint8)(socket->ack >> 16);
|
| 481 |
|
|
packet[TCP_ACK+2] = (uint8)(socket->ack >> 8);
|
| 482 |
|
|
packet[TCP_ACK+3] = (uint8)socket->ack;
|
| 483 |
|
|
count = RECEIVE_WINDOW - (socket->ack - socket->ackProcessed);
|
| 484 |
|
|
if(count < 0)
|
| 485 |
|
|
count = 0;
|
| 486 |
|
|
packet[TCP_WINDOW_SIZE] = (uint8)(count >> 8);
|
| 487 |
|
|
packet[TCP_WINDOW_SIZE+1] = (uint8)count;
|
| 488 |
|
|
packet[TCP_URGENT_POINTER] = 0;
|
| 489 |
|
|
packet[TCP_URGENT_POINTER+1] = 0;
|
| 490 |
|
|
IPSendPacket(socket, frame, length);
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
|
| 494 |
|
|
static void EthernetCreateResponse(unsigned char *packetOut,
|
| 495 |
|
|
const unsigned char *packet,
|
| 496 |
|
|
int length)
|
| 497 |
|
|
{
|
| 498 |
|
|
//Swap destination and source fields
|
| 499 |
|
|
memcpy(packetOut, packet, length);
|
| 500 |
|
|
memcpy(packetOut+ETHERNET_DEST, packet+ETHERNET_SOURCE, 6);
|
| 501 |
|
|
memcpy(packetOut+ETHERNET_SOURCE, packet+ETHERNET_DEST, 6);
|
| 502 |
|
|
if(packet[ETHERNET_FRAME_TYPE+1] == 0x00) //IP
|
| 503 |
|
|
{
|
| 504 |
|
|
memcpy(packetOut+IP_SOURCE, packet+IP_DEST, 4);
|
| 505 |
|
|
memcpy(packetOut+IP_DEST, packet+IP_SOURCE, 4);
|
| 506 |
|
|
if(packet[IP_PROTOCOL] == 0x06 || packet[IP_PROTOCOL] == 0x11) //TCP/UDP
|
| 507 |
|
|
{
|
| 508 |
|
|
memcpy(packetOut+TCP_SOURCE_PORT, packet+TCP_DEST_PORT, 2);
|
| 509 |
|
|
memcpy(packetOut+TCP_DEST_PORT, packet+TCP_SOURCE_PORT, 2);
|
| 510 |
|
|
}
|
| 511 |
|
|
}
|
| 512 |
|
|
}
|
| 513 |
|
|
|
| 514 |
|
|
|
| 515 |
|
|
static void IPDhcp(const unsigned char *packet, int length, int state)
|
| 516 |
|
|
{
|
| 517 |
|
|
uint8 *packetOut, *ptr;
|
| 518 |
|
|
const uint8 *ptr2;
|
| 519 |
|
|
IPFrame *frame;
|
| 520 |
|
|
static int request=0;
|
| 521 |
|
|
|
| 522 |
|
|
if(state == 1)
|
| 523 |
|
|
{
|
| 524 |
|
|
//Create DHCP Discover
|
| 525 |
|
|
frame = IPFrameGet(0);
|
| 526 |
|
|
if(frame == NULL)
|
| 527 |
|
|
return;
|
| 528 |
|
|
packetOut = frame->packet;
|
| 529 |
|
|
memset(packetOut, 0, 512);
|
| 530 |
|
|
memcpy(packetOut, dhcpDiscover, sizeof(dhcpDiscover));
|
| 531 |
|
|
memcpy(packetOut+ETHERNET_SOURCE, ethernetAddressPlasma, 6);
|
| 532 |
|
|
memcpy(packetOut+DHCP_CLIENT_ETHERNET, ethernetAddressPlasma, 6);
|
| 533 |
|
|
memcpy(packetOut+DHCP_MAGIC_COOKIE, dhcpOptions, sizeof(dhcpOptions));
|
| 534 |
|
|
memcpy(packetOut+DHCP_MAGIC_COOKIE+10, ethernetAddressPlasma, 6);
|
| 535 |
|
|
IPSendPacket(NULL, frame, 400);
|
| 536 |
|
|
request = DHCP_DISCOVER;
|
| 537 |
|
|
DhcpRetrySeconds = 2;
|
| 538 |
|
|
}
|
| 539 |
|
|
else if(state == 2 && memcmp(packet+DHCP_CLIENT_ETHERNET, ethernetAddressPlasma, 6) == 0)
|
| 540 |
|
|
{
|
| 541 |
|
|
if(packet[DHCP_MAGIC_COOKIE+6] == DHCP_OFFER && request == DHCP_DISCOVER)
|
| 542 |
|
|
{
|
| 543 |
|
|
//Process DHCP Offer and send DHCP Request
|
| 544 |
|
|
frame = IPFrameGet(0);
|
| 545 |
|
|
if(frame == NULL)
|
| 546 |
|
|
return;
|
| 547 |
|
|
packetOut = frame->packet;
|
| 548 |
|
|
memset(packetOut, 0, 512);
|
| 549 |
|
|
memcpy(packetOut, dhcpDiscover, sizeof(dhcpDiscover));
|
| 550 |
|
|
memcpy(packetOut+ETHERNET_SOURCE, ethernetAddressPlasma, 6);
|
| 551 |
|
|
memcpy(packetOut+DHCP_CLIENT_ETHERNET, ethernetAddressPlasma, 6);
|
| 552 |
|
|
memcpy(packetOut+DHCP_MAGIC_COOKIE, dhcpOptions, sizeof(dhcpOptions));
|
| 553 |
|
|
memcpy(packetOut+DHCP_MAGIC_COOKIE+10, ethernetAddressPlasma, 6);
|
| 554 |
|
|
request = DHCP_REQUEST;
|
| 555 |
|
|
packetOut[DHCP_MAGIC_COOKIE+6] = DHCP_REQUEST;
|
| 556 |
|
|
ptr = packetOut+DHCP_MAGIC_COOKIE+sizeof(dhcpOptions)-1;
|
| 557 |
|
|
ptr[0] = DHCP_REQUEST_IP;
|
| 558 |
|
|
ptr[1] = 4;
|
| 559 |
|
|
memcpy(ptr+2, packet+DHCP_YOUR_IP, 4);
|
| 560 |
|
|
ptr[6] = DHCP_REQUEST_SERV_IP;
|
| 561 |
|
|
ptr[7] = 4;
|
| 562 |
|
|
memcpy(ptr+8, packet+DHCP_SERVER_IP, 4);
|
| 563 |
|
|
ptr[12] = DHCP_END_OPTION;
|
| 564 |
|
|
IPSendPacket(NULL, frame, 400);
|
| 565 |
|
|
}
|
| 566 |
|
|
else if(packet[DHCP_MAGIC_COOKIE+6] == DHCP_ACK && request == DHCP_REQUEST)
|
| 567 |
|
|
{
|
| 568 |
|
|
//Process DHCP Ack
|
| 569 |
|
|
request = 0;
|
| 570 |
|
|
DhcpRetrySeconds = 3600*4;
|
| 571 |
|
|
memcpy(ipAddressPlasma, packet+DHCP_YOUR_IP, 4);
|
| 572 |
|
|
printf("IP=%d.%d.%d.%d ", ipAddressPlasma[0], ipAddressPlasma[1],
|
| 573 |
|
|
ipAddressPlasma[2], ipAddressPlasma[3]);
|
| 574 |
|
|
memcpy(ipAddressGateway, packet+DHCP_GATEWAY_IP, 4);
|
| 575 |
|
|
if(ipAddressGateway[0] == 0 && ipAddressGateway[1] == 0 &&
|
| 576 |
|
|
ipAddressGateway[2] == 0 && ipAddressGateway[3] == 0)
|
| 577 |
|
|
memcpy(ipAddressGateway, packet+DHCP_SERVER_IP, 4);
|
| 578 |
|
|
printf("GW=%d.%d.%d.%d ", ipAddressGateway[0], ipAddressGateway[1],
|
| 579 |
|
|
ipAddressGateway[2], ipAddressGateway[3]);
|
| 580 |
|
|
memcpy(ethernetAddressGateway, packet+ETHERNET_SOURCE, 6);
|
| 581 |
|
|
ptr2 = packet+DHCP_MAGIC_COOKIE+4;
|
| 582 |
|
|
while(ptr2[0] != DHCP_END_OPTION && (int)(ptr2 - packet) < length)
|
| 583 |
|
|
{
|
| 584 |
|
|
if(ptr2[0] == DHCP_PARAM_DNS)
|
| 585 |
|
|
{
|
| 586 |
|
|
ipAddressDns = (ptr2[2] << 24) | (ptr2[3] << 16) | (ptr2[4] << 8) | ptr2[5];
|
| 587 |
|
|
printf("DNS=%d.%d.%d.%d ", ptr2[2], ptr2[3], ptr2[4], ptr2[5]);
|
| 588 |
|
|
}
|
| 589 |
|
|
ptr2 += ptr2[1] + 2;
|
| 590 |
|
|
}
|
| 591 |
|
|
|
| 592 |
|
|
//Check if DHCP reply came from gateway
|
| 593 |
|
|
if(memcmp(packet+IP_SOURCE, ipAddressGateway, 4))
|
| 594 |
|
|
{
|
| 595 |
|
|
//Send ARP to gateway
|
| 596 |
|
|
frame = IPFrameGet(0);
|
| 597 |
|
|
if(frame == NULL)
|
| 598 |
|
|
return;
|
| 599 |
|
|
packetOut = frame->packet;
|
| 600 |
|
|
memset(packetOut, 0, 512);
|
| 601 |
|
|
memset(packetOut+ETHERNET_DEST, 0xff, 6);
|
| 602 |
|
|
memcpy(packetOut+ETHERNET_SOURCE, ethernetAddressPlasma, 6);
|
| 603 |
|
|
packetOut[ETHERNET_FRAME_TYPE] = 0x08;
|
| 604 |
|
|
packetOut[ETHERNET_FRAME_TYPE+1] = 0x06;
|
| 605 |
|
|
packetOut[ARP_HARD_TYPE+1] = 0x01;
|
| 606 |
|
|
packetOut[ARP_PROT_TYPE] = 0x08;
|
| 607 |
|
|
packetOut[ARP_HARD_SIZE] = 0x06;
|
| 608 |
|
|
packetOut[ARP_PROT_SIZE] = 0x04;
|
| 609 |
|
|
packetOut[ARP_OP+1] = 1;
|
| 610 |
|
|
memcpy(packetOut+ARP_ETHERNET_SENDER, ethernetAddressPlasma, 6);
|
| 611 |
|
|
memcpy(packetOut+ARP_IP_SENDER, ipAddressPlasma, 4);
|
| 612 |
|
|
memcpy(packetOut+ARP_IP_TARGET, ipAddressGateway, 4);
|
| 613 |
|
|
IPSendPacket(NULL, frame, 60);
|
| 614 |
|
|
}
|
| 615 |
|
|
}
|
| 616 |
|
|
}
|
| 617 |
|
|
}
|
| 618 |
|
|
|
| 619 |
|
|
|
| 620 |
|
|
uint32 IPAddressSelf(void)
|
| 621 |
|
|
{
|
| 622 |
|
|
return (ipAddressPlasma[0] << 24) | (ipAddressPlasma[1] << 16) |
|
| 623 |
|
|
(ipAddressPlasma[2] << 8) | ipAddressPlasma[3];
|
| 624 |
|
|
}
|
| 625 |
|
|
|
| 626 |
|
|
|
| 627 |
|
|
static int IPProcessTCPPacket(IPFrame *frameIn)
|
| 628 |
|
|
{
|
| 629 |
|
|
uint32 seq, ack;
|
| 630 |
|
|
int length, ip_length, bytes, rc=0, notify=0;
|
| 631 |
|
|
IPSocket *socket, *socketNew;
|
| 632 |
|
|
IPFrame *frameOut, *frame2, *framePrev;
|
| 633 |
|
|
uint8 *packet, *packetOut;
|
| 634 |
|
|
|
| 635 |
|
|
packet = frameIn->packet;
|
| 636 |
|
|
length = frameIn->length;
|
| 637 |
|
|
|
| 638 |
|
|
ip_length = (packet[IP_LENGTH] << 8) | packet[IP_LENGTH+1];
|
| 639 |
|
|
seq = (packet[TCP_SEQ] << 24) | (packet[TCP_SEQ+1] << 16) |
|
| 640 |
|
|
(packet[TCP_SEQ+2] << 8) | packet[TCP_SEQ+3];
|
| 641 |
|
|
ack = (packet[TCP_ACK] << 24) | (packet[TCP_ACK+1] << 16) |
|
| 642 |
|
|
(packet[TCP_ACK+2] << 8) | packet[TCP_ACK+3];
|
| 643 |
|
|
|
| 644 |
|
|
//Check if start of connection
|
| 645 |
|
|
if((packet[TCP_FLAGS] & (TCP_FLAGS_SYN | TCP_FLAGS_ACK)) == TCP_FLAGS_SYN)
|
| 646 |
|
|
{
|
| 647 |
|
|
if(IPVerbose)
|
| 648 |
|
|
printf("S");
|
| 649 |
|
|
//Check if duplicate SYN
|
| 650 |
|
|
for(socket = SocketHead; socket; socket = socket->next)
|
| 651 |
|
|
{
|
| 652 |
|
|
if(socket->state != IP_LISTEN &&
|
| 653 |
|
|
packet[IP_PROTOCOL] == socket->headerRcv[IP_PROTOCOL] &&
|
| 654 |
|
|
memcmp(packet+IP_SOURCE, socket->headerRcv+IP_SOURCE, 8) == 0 &&
|
| 655 |
|
|
memcmp(packet+TCP_SOURCE_PORT, socket->headerRcv+TCP_SOURCE_PORT, 4) == 0)
|
| 656 |
|
|
{
|
| 657 |
|
|
if(IPVerbose)
|
| 658 |
|
|
printf("s");
|
| 659 |
|
|
return 0;
|
| 660 |
|
|
}
|
| 661 |
|
|
}
|
| 662 |
|
|
|
| 663 |
|
|
//Find an open port
|
| 664 |
|
|
for(socket = SocketHead; socket; socket = socket->next)
|
| 665 |
|
|
{
|
| 666 |
|
|
if(socket->state == IP_LISTEN &&
|
| 667 |
|
|
packet[IP_PROTOCOL] == socket->headerRcv[IP_PROTOCOL] &&
|
| 668 |
|
|
memcmp(packet+TCP_DEST_PORT, socket->headerRcv+TCP_DEST_PORT, 2) == 0)
|
| 669 |
|
|
{
|
| 670 |
|
|
//Create a new socket
|
| 671 |
|
|
frameOut = IPFrameGet(FRAME_COUNT_SYNC);
|
| 672 |
|
|
if(frameOut == NULL)
|
| 673 |
|
|
return 0;
|
| 674 |
|
|
socketNew = (IPSocket*)malloc(sizeof(IPSocket));
|
| 675 |
|
|
if(socketNew == NULL)
|
| 676 |
|
|
return 0;
|
| 677 |
|
|
memcpy(socketNew, socket, sizeof(IPSocket));
|
| 678 |
|
|
socketNew->state = IP_TCP;
|
| 679 |
|
|
socketNew->timeout = SOCKET_TIMEOUT;
|
| 680 |
|
|
socketNew->ack = seq;
|
| 681 |
|
|
socketNew->ackProcessed = seq + 1;
|
| 682 |
|
|
socketNew->seq = socketNew->ack + 0x12345678;
|
| 683 |
|
|
socketNew->seqReceived = socketNew->seq;
|
| 684 |
|
|
socketNew->seqWindow = (packet[TCP_WINDOW_SIZE] << 8) | packet[TCP_WINDOW_SIZE+1];
|
| 685 |
|
|
|
| 686 |
|
|
//Send ACK
|
| 687 |
|
|
packetOut = frameOut->packet;
|
| 688 |
|
|
EthernetCreateResponse(packetOut, packet, length);
|
| 689 |
|
|
memcpy(socketNew->headerRcv, packet, TCP_SEQ);
|
| 690 |
|
|
memcpy(socketNew->headerSend, packetOut, TCP_SEQ);
|
| 691 |
|
|
packetOut[TCP_FLAGS] = TCP_FLAGS_SYN | TCP_FLAGS_ACK;
|
| 692 |
|
|
++socketNew->ack;
|
| 693 |
|
|
packetOut[TCP_DATA] = 2; //maximum segment size = 536
|
| 694 |
|
|
packetOut[TCP_DATA+1] = 4;
|
| 695 |
|
|
packetOut[TCP_DATA+2] = 2;
|
| 696 |
|
|
packetOut[TCP_DATA+3] = 24;
|
| 697 |
|
|
TCPSendPacket(socketNew, frameOut, TCP_DATA+4);
|
| 698 |
|
|
++socketNew->seq;
|
| 699 |
|
|
|
| 700 |
|
|
//Add socket to linked list
|
| 701 |
|
|
OS_MutexPend(IPMutex);
|
| 702 |
|
|
socketNew->next = SocketHead;
|
| 703 |
|
|
socketNew->prev = NULL;
|
| 704 |
|
|
if(SocketHead)
|
| 705 |
|
|
SocketHead->prev = socketNew;
|
| 706 |
|
|
SocketHead = socketNew;
|
| 707 |
|
|
OS_MutexPost(IPMutex);
|
| 708 |
|
|
if(socketNew->funcPtr)
|
| 709 |
|
|
OS_Job(socketNew->funcPtr, socketNew, 0, 0);
|
| 710 |
|
|
return 0;
|
| 711 |
|
|
}
|
| 712 |
|
|
}
|
| 713 |
|
|
|
| 714 |
|
|
//Send reset
|
| 715 |
|
|
frameOut = IPFrameGet(0);
|
| 716 |
|
|
if(frameOut == NULL)
|
| 717 |
|
|
return 0;
|
| 718 |
|
|
packetOut = frameOut->packet;
|
| 719 |
|
|
EthernetCreateResponse(packetOut, packet, TCP_DATA);
|
| 720 |
|
|
memset(packetOut+TCP_SEQ, 0, 4);
|
| 721 |
|
|
++seq;
|
| 722 |
|
|
packetOut[TCP_ACK] = (uint8)(seq >> 24);
|
| 723 |
|
|
packetOut[TCP_ACK+1] = (uint8)(seq >> 16);
|
| 724 |
|
|
packetOut[TCP_ACK+2] = (uint8)(seq >> 8);
|
| 725 |
|
|
packetOut[TCP_ACK+3] = (uint8)seq;
|
| 726 |
|
|
packetOut[TCP_HEADER_LENGTH] = 0x50;
|
| 727 |
|
|
packetOut[TCP_FLAGS] = TCP_FLAGS_RST;
|
| 728 |
|
|
IPSendPacket(NULL, frameOut, TCP_DATA);
|
| 729 |
|
|
return 0;
|
| 730 |
|
|
}
|
| 731 |
|
|
|
| 732 |
|
|
//Find an open socket
|
| 733 |
|
|
for(socket = SocketHead; socket; socket = socket->next)
|
| 734 |
|
|
{
|
| 735 |
|
|
if(packet[IP_PROTOCOL] == socket->headerRcv[IP_PROTOCOL] &&
|
| 736 |
|
|
memcmp(packet+IP_SOURCE, socket->headerRcv+IP_SOURCE, 8) == 0 &&
|
| 737 |
|
|
memcmp(packet+TCP_SOURCE_PORT, socket->headerRcv+TCP_SOURCE_PORT, 4) == 0)
|
| 738 |
|
|
{
|
| 739 |
|
|
break;
|
| 740 |
|
|
}
|
| 741 |
|
|
}
|
| 742 |
|
|
if(socket == NULL)
|
| 743 |
|
|
{
|
| 744 |
|
|
return 0;
|
| 745 |
|
|
}
|
| 746 |
|
|
|
| 747 |
|
|
//Determine window
|
| 748 |
|
|
socket->seqWindow = (packet[TCP_WINDOW_SIZE] << 8) | packet[TCP_WINDOW_SIZE+1];
|
| 749 |
|
|
bytes = ip_length - (TCP_DATA - IP_VERSION_LENGTH);
|
| 750 |
|
|
|
| 751 |
|
|
//Check if packets can be removed from retransmition list
|
| 752 |
|
|
if(packet[TCP_FLAGS] & TCP_FLAGS_ACK)
|
| 753 |
|
|
{
|
| 754 |
|
|
if(ack != socket->seqReceived)
|
| 755 |
|
|
{
|
| 756 |
|
|
OS_MutexPend(IPMutex);
|
| 757 |
|
|
for(frame2 = FrameResendHead; frame2; )
|
| 758 |
|
|
{
|
| 759 |
|
|
framePrev = frame2;
|
| 760 |
|
|
frame2 = frame2->next;
|
| 761 |
|
|
if(framePrev->socket == socket && (int)(ack - framePrev->seqEnd) >= 0)
|
| 762 |
|
|
{
|
| 763 |
|
|
//Remove packet from retransmition queue
|
| 764 |
|
|
if(socket->timeout)
|
| 765 |
|
|
socket->timeout = socket->timeoutReset;
|
| 766 |
|
|
FrameRemove(&FrameResendHead, &FrameResendTail, framePrev);
|
| 767 |
|
|
FrameFree(framePrev);
|
| 768 |
|
|
}
|
| 769 |
|
|
}
|
| 770 |
|
|
OS_MutexPost(IPMutex);
|
| 771 |
|
|
socket->seqReceived = ack;
|
| 772 |
|
|
socket->resentDone = 0;
|
| 773 |
|
|
}
|
| 774 |
|
|
else if(ack == socket->seqReceived && bytes == 0 &&
|
| 775 |
|
|
(packet[TCP_FLAGS] & (TCP_FLAGS_RST | TCP_FLAGS_FIN)) == 0 &&
|
| 776 |
|
|
socket->resentDone == 0)
|
| 777 |
|
|
{
|
| 778 |
|
|
//Detected that packet was lost, resend all
|
| 779 |
|
|
if(IPVerbose)
|
| 780 |
|
|
printf("A");
|
| 781 |
|
|
OS_MutexPend(IPMutex);
|
| 782 |
|
|
for(frame2 = FrameResendHead; frame2; )
|
| 783 |
|
|
{
|
| 784 |
|
|
framePrev = frame2;
|
| 785 |
|
|
frame2 = frame2->next;
|
| 786 |
|
|
if(framePrev->socket == socket)
|
| 787 |
|
|
{
|
| 788 |
|
|
//Remove packet from retransmition queue
|
| 789 |
|
|
FrameRemove(&FrameResendHead, &FrameResendTail, framePrev);
|
| 790 |
|
|
IPSendFrame(framePrev);
|
| 791 |
|
|
}
|
| 792 |
|
|
}
|
| 793 |
|
|
OS_MutexPost(IPMutex);
|
| 794 |
|
|
socket->resentDone = 1;
|
| 795 |
|
|
}
|
| 796 |
|
|
}
|
| 797 |
|
|
|
| 798 |
|
|
//Check if SYN/ACK
|
| 799 |
|
|
if((packet[TCP_FLAGS] & (TCP_FLAGS_SYN | TCP_FLAGS_ACK)) ==
|
| 800 |
|
|
(TCP_FLAGS_SYN | TCP_FLAGS_ACK))
|
| 801 |
|
|
{
|
| 802 |
|
|
//Ack SYN/ACK
|
| 803 |
|
|
socket->ack = seq + 1;
|
| 804 |
|
|
socket->ackProcessed = seq + 1;
|
| 805 |
|
|
frameOut = IPFrameGet(FRAME_COUNT_SEND);
|
| 806 |
|
|
if(frameOut)
|
| 807 |
|
|
{
|
| 808 |
|
|
frameOut->packet[TCP_FLAGS] = TCP_FLAGS_ACK;
|
| 809 |
|
|
TCPSendPacket(socket, frameOut, TCP_DATA);
|
| 810 |
|
|
}
|
| 811 |
|
|
if(socket->funcPtr)
|
| 812 |
|
|
OS_Job(socket->funcPtr, socket, 0, 0);
|
| 813 |
|
|
return 0;
|
| 814 |
|
|
}
|
| 815 |
|
|
if(packet[TCP_HEADER_LENGTH] != 0x50)
|
| 816 |
|
|
{
|
| 817 |
|
|
if(IPVerbose)
|
| 818 |
|
|
printf("length error\n");
|
| 819 |
|
|
return 0;
|
| 820 |
|
|
}
|
| 821 |
|
|
|
| 822 |
|
|
//Check if RST flag set
|
| 823 |
|
|
if(packet[TCP_FLAGS] & TCP_FLAGS_RST)
|
| 824 |
|
|
{
|
| 825 |
|
|
notify = 1;
|
| 826 |
|
|
if(socket->state == IP_FIN_SERVER)
|
| 827 |
|
|
IPClose2(socket);
|
| 828 |
|
|
else if(socket->state == IP_TCP)
|
| 829 |
|
|
socket->state = IP_FIN_CLIENT;
|
| 830 |
|
|
}
|
| 831 |
|
|
//Copy packet into socket
|
| 832 |
|
|
else if(socket->ack == seq && bytes > 0)
|
| 833 |
|
|
{
|
| 834 |
|
|
//Insert packet into socket linked list
|
| 835 |
|
|
notify = 1;
|
| 836 |
|
|
if(socket->timeout)
|
| 837 |
|
|
socket->timeout = socket->timeoutReset;
|
| 838 |
|
|
if(IPVerbose)
|
| 839 |
|
|
printf("D");
|
| 840 |
|
|
if(frameIn->length > ip_length + IP_VERSION_LENGTH)
|
| 841 |
|
|
frameIn->length = (uint16)(ip_length + IP_VERSION_LENGTH);
|
| 842 |
|
|
FrameInsert(&socket->frameReadHead, &socket->frameReadTail, frameIn);
|
| 843 |
|
|
socket->ack += bytes;
|
| 844 |
|
|
|
| 845 |
|
|
//Ack data
|
| 846 |
|
|
frameOut = IPFrameGet(FRAME_COUNT_SEND);
|
| 847 |
|
|
if(frameOut)
|
| 848 |
|
|
{
|
| 849 |
|
|
frameOut->packet[TCP_FLAGS] = TCP_FLAGS_ACK;
|
| 850 |
|
|
TCPSendPacket(socket, frameOut, TCP_DATA);
|
| 851 |
|
|
}
|
| 852 |
|
|
|
| 853 |
|
|
//Using frame
|
| 854 |
|
|
rc = 1;
|
| 855 |
|
|
}
|
| 856 |
|
|
else if(bytes)
|
| 857 |
|
|
{
|
| 858 |
|
|
//Ack with current offset since data missing
|
| 859 |
|
|
frameOut = IPFrameGet(FRAME_COUNT_SEND);
|
| 860 |
|
|
if(frameOut)
|
| 861 |
|
|
{
|
| 862 |
|
|
frameOut->packet[TCP_FLAGS] = TCP_FLAGS_ACK;
|
| 863 |
|
|
TCPSendPacket(socket, frameOut, TCP_DATA);
|
| 864 |
|
|
}
|
| 865 |
|
|
}
|
| 866 |
|
|
|
| 867 |
|
|
//Check if FIN flag set
|
| 868 |
|
|
if(packet[TCP_FLAGS] & TCP_FLAGS_FIN && socket->ack >= seq)
|
| 869 |
|
|
{
|
| 870 |
|
|
notify = 1;
|
| 871 |
|
|
socket->timeout = SOCKET_TIMEOUT;
|
| 872 |
|
|
if(IPVerbose)
|
| 873 |
|
|
printf("F");
|
| 874 |
|
|
frameOut = IPFrameGet(0);
|
| 875 |
|
|
if(frameOut == NULL)
|
| 876 |
|
|
return 0;
|
| 877 |
|
|
packetOut = frameOut->packet;
|
| 878 |
|
|
packetOut[TCP_FLAGS] = TCP_FLAGS_ACK;
|
| 879 |
|
|
++socket->ack;
|
| 880 |
|
|
TCPSendPacket(socket, frameOut, TCP_DATA);
|
| 881 |
|
|
if(socket->state == IP_FIN_SERVER)
|
| 882 |
|
|
IPClose2(socket);
|
| 883 |
|
|
else if(socket->state == IP_TCP)
|
| 884 |
|
|
socket->state = IP_FIN_CLIENT;
|
| 885 |
|
|
}
|
| 886 |
|
|
|
| 887 |
|
|
//Notify application
|
| 888 |
|
|
if(socket->funcPtr && notify)
|
| 889 |
|
|
OS_Job(socket->funcPtr, socket, 0, 0);
|
| 890 |
|
|
return rc;
|
| 891 |
|
|
}
|
| 892 |
|
|
|
| 893 |
|
|
|
| 894 |
|
|
int IPProcessEthernetPacket(IPFrame *frameIn, int length)
|
| 895 |
|
|
{
|
| 896 |
|
|
int ip_length, rc;
|
| 897 |
|
|
IPSocket *socket;
|
| 898 |
|
|
IPFrame *frameOut;
|
| 899 |
|
|
uint8 *packet, *packetOut;
|
| 900 |
|
|
|
| 901 |
|
|
packet = frameIn->packet;
|
| 902 |
|
|
frameIn->length = (uint16)length;
|
| 903 |
|
|
|
| 904 |
|
|
if(packet[ETHERNET_FRAME_TYPE] != 0x08 || frameIn->length > PACKET_SIZE)
|
| 905 |
|
|
return 0; //wrong ethernet type, packet not used
|
| 906 |
|
|
|
| 907 |
|
|
//ARP?
|
| 908 |
|
|
if(packet[ETHERNET_FRAME_TYPE+1] == 0x06)
|
| 909 |
|
|
{
|
| 910 |
|
|
//Check if ARP reply
|
| 911 |
|
|
if(memcmp(packet+ETHERNET_DEST, ethernetAddressPlasma, 6) == 0 &&
|
| 912 |
|
|
packet[ARP_OP+1] == 2 && memcmp(packet+ARP_IP_SENDER, ipAddressGateway, 4) == 0)
|
| 913 |
|
|
{
|
| 914 |
|
|
//Found MAC address for gateway
|
| 915 |
|
|
memcpy(ethernetAddressGateway, packet+ARP_ETHERNET_SENDER, 6);
|
| 916 |
|
|
return 0;
|
| 917 |
|
|
}
|
| 918 |
|
|
|
| 919 |
|
|
//Check if ARP request
|
| 920 |
|
|
if(packet[ARP_OP] != 0 || packet[ARP_OP+1] != 1 ||
|
| 921 |
|
|
memcmp(packet+ARP_IP_TARGET, ipAddressPlasma, 4))
|
| 922 |
|
|
return 0;
|
| 923 |
|
|
//Create ARP response
|
| 924 |
|
|
frameOut = IPFrameGet(0);
|
| 925 |
|
|
if(frameOut == NULL)
|
| 926 |
|
|
return 0;
|
| 927 |
|
|
packetOut = frameOut->packet;
|
| 928 |
|
|
memcpy(packetOut, packet, frameIn->length);
|
| 929 |
|
|
memcpy(packetOut+ETHERNET_DEST, packet+ETHERNET_SOURCE, 6);
|
| 930 |
|
|
memcpy(packetOut+ETHERNET_SOURCE, ethernetAddressPlasma, 6);
|
| 931 |
|
|
packetOut[ARP_OP+1] = 2; //ARP reply
|
| 932 |
|
|
memcpy(packetOut+ARP_ETHERNET_SENDER, ethernetAddressPlasma, 6);
|
| 933 |
|
|
memcpy(packetOut+ARP_IP_SENDER, packet+ARP_IP_TARGET, 4);
|
| 934 |
|
|
memcpy(packetOut+ARP_ETHERNET_TARGET, packet+ARP_ETHERNET_SENDER, 6);
|
| 935 |
|
|
memcpy(packetOut+ARP_IP_TARGET, packet+ARP_IP_SENDER, 4);
|
| 936 |
|
|
IPSendPacket(NULL, frameOut, frameIn->length);
|
| 937 |
|
|
return 0;
|
| 938 |
|
|
}
|
| 939 |
|
|
|
| 940 |
|
|
//Check if proper type of packet
|
| 941 |
|
|
ip_length = (packet[IP_LENGTH] << 8) | packet[IP_LENGTH+1];
|
| 942 |
|
|
if(frameIn->length < UDP_DATA || ip_length > frameIn->length - IP_VERSION_LENGTH)
|
| 943 |
|
|
return 0;
|
| 944 |
|
|
if(packet[ETHERNET_FRAME_TYPE+1] != 0x00 ||
|
| 945 |
|
|
packet[IP_VERSION_LENGTH] != 0x45)
|
| 946 |
|
|
return 0;
|
| 947 |
|
|
|
| 948 |
|
|
//Check if DHCP reply
|
| 949 |
|
|
if(packet[IP_PROTOCOL] == 0x11 &&
|
| 950 |
|
|
packet[UDP_SOURCE_PORT] == 0 && packet[UDP_SOURCE_PORT+1] == 67 &&
|
| 951 |
|
|
packet[UDP_DEST_PORT] == 0 && packet[UDP_DEST_PORT+1] == 68)
|
| 952 |
|
|
{
|
| 953 |
|
|
IPDhcp(packet, frameIn->length, 2); //DHCP reply
|
| 954 |
|
|
return 0;
|
| 955 |
|
|
}
|
| 956 |
|
|
|
| 957 |
|
|
//Check if correct destination address
|
| 958 |
|
|
if(memcmp(packet+ETHERNET_DEST, ethernetAddressPlasma, 6) ||
|
| 959 |
|
|
memcmp(packet+IP_DEST, ipAddressPlasma, 4))
|
| 960 |
|
|
return 0;
|
| 961 |
|
|
rc = EthernetVerifyChecksums(packet, frameIn->length);
|
| 962 |
|
|
//if(rc)
|
| 963 |
|
|
//{
|
| 964 |
|
|
// printf("C ");
|
| 965 |
|
|
// return;
|
| 966 |
|
|
//}
|
| 967 |
|
|
|
| 968 |
|
|
//PING request?
|
| 969 |
|
|
if(packet[IP_PROTOCOL] == 1)
|
| 970 |
|
|
{
|
| 971 |
|
|
if(packet[PING_TYPE] == 0) //PING reply
|
| 972 |
|
|
{
|
| 973 |
|
|
for(socket = SocketHead; socket; socket = socket->next)
|
| 974 |
|
|
{
|
| 975 |
|
|
if(socket->state == IP_PING &&
|
| 976 |
|
|
memcmp(packet+IP_SOURCE, socket->headerSend+IP_DEST, 4) == 0)
|
| 977 |
|
|
{
|
| 978 |
|
|
OS_Job(socket->funcPtr, socket, 0, 0);
|
| 979 |
|
|
return 0;
|
| 980 |
|
|
}
|
| 981 |
|
|
}
|
| 982 |
|
|
}
|
| 983 |
|
|
if(packet[PING_TYPE] != 8)
|
| 984 |
|
|
return 0;
|
| 985 |
|
|
frameOut = IPFrameGet(FRAME_COUNT_SEND);
|
| 986 |
|
|
if(frameOut == NULL)
|
| 987 |
|
|
return 0;
|
| 988 |
|
|
packetOut = frameOut->packet;
|
| 989 |
|
|
EthernetCreateResponse(packetOut, packet, frameIn->length);
|
| 990 |
|
|
frameOut->packet[PING_TYPE] = 0; //PING reply
|
| 991 |
|
|
IPSendPacket(NULL, frameOut, frameIn->length);
|
| 992 |
|
|
return 0;
|
| 993 |
|
|
}
|
| 994 |
|
|
|
| 995 |
|
|
//TCP packet?
|
| 996 |
|
|
if(packet[IP_PROTOCOL] == 0x06)
|
| 997 |
|
|
{
|
| 998 |
|
|
return IPProcessTCPPacket(frameIn);
|
| 999 |
|
|
}
|
| 1000 |
|
|
|
| 1001 |
|
|
//UDP packet?
|
| 1002 |
|
|
if(packet[IP_PROTOCOL] == 0x11)
|
| 1003 |
|
|
{
|
| 1004 |
|
|
//Find open socket
|
| 1005 |
|
|
for(socket = SocketHead; socket; socket = socket->next)
|
| 1006 |
|
|
{
|
| 1007 |
|
|
if(packet[IP_PROTOCOL] == socket->headerRcv[IP_PROTOCOL] &&
|
| 1008 |
|
|
memcmp(packet+IP_SOURCE, socket->headerRcv+IP_SOURCE, 8) == 0 &&
|
| 1009 |
|
|
memcmp(packet+UDP_SOURCE_PORT, socket->headerRcv+UDP_SOURCE_PORT, 2) == 0)
|
| 1010 |
|
|
{
|
| 1011 |
|
|
break;
|
| 1012 |
|
|
}
|
| 1013 |
|
|
}
|
| 1014 |
|
|
|
| 1015 |
|
|
if(socket == NULL)
|
| 1016 |
|
|
{
|
| 1017 |
|
|
//Find listening socket
|
| 1018 |
|
|
for(socket = SocketHead; socket; socket = socket->next)
|
| 1019 |
|
|
{
|
| 1020 |
|
|
if(packet[IP_PROTOCOL] == socket->headerRcv[IP_PROTOCOL] &&
|
| 1021 |
|
|
memcmp(packet+UDP_DEST_PORT, socket->headerRcv+UDP_DEST_PORT, 2) == 0)
|
| 1022 |
|
|
{
|
| 1023 |
|
|
EthernetCreateResponse(socket->headerSend, packet, UDP_DATA);
|
| 1024 |
|
|
break;
|
| 1025 |
|
|
}
|
| 1026 |
|
|
}
|
| 1027 |
|
|
}
|
| 1028 |
|
|
|
| 1029 |
|
|
if(socket)
|
| 1030 |
|
|
{
|
| 1031 |
|
|
if(IPVerbose)
|
| 1032 |
|
|
printf("U");
|
| 1033 |
|
|
FrameInsert(&socket->frameReadHead, &socket->frameReadTail, frameIn);
|
| 1034 |
|
|
OS_Job(socket->funcPtr, socket, 0, 0);
|
| 1035 |
|
|
return 1;
|
| 1036 |
|
|
}
|
| 1037 |
|
|
}
|
| 1038 |
|
|
return 0;
|
| 1039 |
|
|
}
|
| 1040 |
|
|
|
| 1041 |
|
|
|
| 1042 |
|
|
#ifndef WIN32
|
| 1043 |
|
|
static void IPMainThread(void *arg)
|
| 1044 |
|
|
{
|
| 1045 |
|
|
uint32 message[4];
|
| 1046 |
|
|
int rc;
|
| 1047 |
|
|
IPFrame *frame, *frameOut=NULL;
|
| 1048 |
|
|
uint32 ticks, ticksLast;
|
| 1049 |
|
|
(void)arg;
|
| 1050 |
|
|
|
| 1051 |
|
|
ticksLast = OS_ThreadTime();
|
| 1052 |
|
|
memset(message, 0, sizeof(message));
|
| 1053 |
|
|
|
| 1054 |
|
|
for(;;)
|
| 1055 |
|
|
{
|
| 1056 |
|
|
Led(0);
|
| 1057 |
|
|
rc = OS_MQueueGet(IPMQueue, message, 10);
|
| 1058 |
|
|
if(rc == 0)
|
| 1059 |
|
|
{
|
| 1060 |
|
|
frame = (IPFrame*)message[1];
|
| 1061 |
|
|
if(message[0] == 0) //frame received
|
| 1062 |
|
|
{
|
| 1063 |
|
|
Led(1);
|
| 1064 |
|
|
frame->length = (uint16)message[2];
|
| 1065 |
|
|
rc = IPProcessEthernetPacket(frame, frame->length);
|
| 1066 |
|
|
if(rc == 0)
|
| 1067 |
|
|
FrameFree(frame);
|
| 1068 |
|
|
}
|
| 1069 |
|
|
else if(message[0] == 1) //frame sent
|
| 1070 |
|
|
{
|
| 1071 |
|
|
Led(2);
|
| 1072 |
|
|
assert(frame == frameOut);
|
| 1073 |
|
|
IPFrameReschedule(frame);
|
| 1074 |
|
|
frameOut = NULL;
|
| 1075 |
|
|
}
|
| 1076 |
|
|
else if(message[0] == 2) //frame ready to send
|
| 1077 |
|
|
{
|
| 1078 |
|
|
}
|
| 1079 |
|
|
}
|
| 1080 |
|
|
|
| 1081 |
|
|
if(frameOut == NULL)
|
| 1082 |
|
|
{
|
| 1083 |
|
|
OS_MutexPend(IPMutex);
|
| 1084 |
|
|
frameOut = FrameSendTail;
|
| 1085 |
|
|
if(frameOut)
|
| 1086 |
|
|
FrameRemove(&FrameSendHead, &FrameSendTail, frameOut);
|
| 1087 |
|
|
OS_MutexPost(IPMutex);
|
| 1088 |
|
|
if(frameOut)
|
| 1089 |
|
|
{
|
| 1090 |
|
|
Led(4);
|
| 1091 |
|
|
UartPacketSend(frameOut->packet, frameOut->length);
|
| 1092 |
|
|
}
|
| 1093 |
|
|
}
|
| 1094 |
|
|
|
| 1095 |
|
|
ticks = OS_ThreadTime();
|
| 1096 |
|
|
if(ticks - ticksLast > 100)
|
| 1097 |
|
|
{
|
| 1098 |
|
|
IPTick();
|
| 1099 |
|
|
ticksLast = ticks;
|
| 1100 |
|
|
}
|
| 1101 |
|
|
}
|
| 1102 |
|
|
}
|
| 1103 |
|
|
#endif
|
| 1104 |
|
|
|
| 1105 |
|
|
|
| 1106 |
|
|
uint8 *MyPacketGet(void)
|
| 1107 |
|
|
{
|
| 1108 |
|
|
return (uint8*)IPFrameGet(FRAME_COUNT_RCV);
|
| 1109 |
|
|
}
|
| 1110 |
|
|
|
| 1111 |
|
|
|
| 1112 |
|
|
//Set FrameSendFunction only if single threaded
|
| 1113 |
|
|
void IPInit(IPFuncPtr frameSendFunction, uint8 macAddress[6], char name[6])
|
| 1114 |
|
|
{
|
| 1115 |
|
|
int i;
|
| 1116 |
|
|
IPFrame *frame;
|
| 1117 |
|
|
|
| 1118 |
|
|
if(macAddress)
|
| 1119 |
|
|
memcpy(ethernetAddressPlasma, macAddress, 6);
|
| 1120 |
|
|
if(name)
|
| 1121 |
|
|
memcpy(dhcpOptions+18, name, 6);
|
| 1122 |
|
|
FrameSendFunc = frameSendFunction;
|
| 1123 |
|
|
IPMutex = OS_MutexCreate("IPSem");
|
| 1124 |
|
|
IPMQueue = OS_MQueueCreate("IPMQ", FRAME_COUNT*2, 32);
|
| 1125 |
|
|
for(i = 0; i < FRAME_COUNT; ++i)
|
| 1126 |
|
|
{
|
| 1127 |
|
|
frame = (IPFrame*)malloc(sizeof(IPFrame));
|
| 1128 |
|
|
memset(frame, 0, sizeof(IPFrame));
|
| 1129 |
|
|
frame->next = FrameFreeHead;
|
| 1130 |
|
|
frame->prev = NULL;
|
| 1131 |
|
|
FrameFreeHead = frame;
|
| 1132 |
|
|
}
|
| 1133 |
|
|
FrameFreeCount = FRAME_COUNT;
|
| 1134 |
|
|
#ifndef WIN32
|
| 1135 |
|
|
UartPacketConfig(MyPacketGet, PACKET_SIZE, IPMQueue);
|
| 1136 |
|
|
if(frameSendFunction == NULL)
|
| 1137 |
|
|
IPThread = OS_ThreadCreate("TCP/IP", IPMainThread, NULL, 240, 6000);
|
| 1138 |
|
|
#endif
|
| 1139 |
|
|
IPDhcp(NULL, 360, 1); //Send DHCP request
|
| 1140 |
|
|
}
|
| 1141 |
|
|
|
| 1142 |
|
|
|
| 1143 |
|
|
//To open a socket for listen set ipAddress to 0
|
| 1144 |
|
|
IPSocket *IPOpen(IPMode_e mode, uint32 ipAddress, uint32 port, IPFuncPtr funcPtr)
|
| 1145 |
|
|
{
|
| 1146 |
|
|
IPSocket *socket;
|
| 1147 |
|
|
uint8 *ptrSend, *ptrRcv;
|
| 1148 |
|
|
IPFrame *frame;
|
| 1149 |
|
|
static int portSource=0x1007;
|
| 1150 |
|
|
|
| 1151 |
|
|
socket = (IPSocket*)malloc(sizeof(IPSocket));
|
| 1152 |
|
|
if(socket == NULL)
|
| 1153 |
|
|
return socket;
|
| 1154 |
|
|
memset(socket, 0, sizeof(IPSocket));
|
| 1155 |
|
|
socket->prev = NULL;
|
| 1156 |
|
|
socket->state = IP_LISTEN;
|
| 1157 |
|
|
socket->timeout = 0;
|
| 1158 |
|
|
socket->timeoutReset = SOCKET_TIMEOUT;
|
| 1159 |
|
|
socket->frameReadHead = NULL;
|
| 1160 |
|
|
socket->frameReadTail = NULL;
|
| 1161 |
|
|
socket->readOffset = 0;
|
| 1162 |
|
|
socket->funcPtr = funcPtr;
|
| 1163 |
|
|
socket->userData = 0;
|
| 1164 |
|
|
socket->userFunc = NULL;
|
| 1165 |
|
|
socket->userPtr = NULL;
|
| 1166 |
|
|
socket->seqWindow = 2048;
|
| 1167 |
|
|
ptrSend = socket->headerSend;
|
| 1168 |
|
|
ptrRcv = socket->headerRcv;
|
| 1169 |
|
|
|
| 1170 |
|
|
if(ipAddress == 0)
|
| 1171 |
|
|
{
|
| 1172 |
|
|
//Setup listing port
|
| 1173 |
|
|
socket->headerRcv[TCP_DEST_PORT] = (uint8)(port >> 8);
|
| 1174 |
|
|
socket->headerRcv[TCP_DEST_PORT+1] = (uint8)port;
|
| 1175 |
|
|
}
|
| 1176 |
|
|
else
|
| 1177 |
|
|
{
|
| 1178 |
|
|
//Setup sending packet
|
| 1179 |
|
|
memset(ptrSend, 0, UDP_LENGTH);
|
| 1180 |
|
|
memset(ptrRcv, 0, UDP_LENGTH);
|
| 1181 |
|
|
|
| 1182 |
|
|
//Setup Ethernet
|
| 1183 |
|
|
if(ipAddress != IPAddressSelf())
|
| 1184 |
|
|
memcpy(ptrSend+ETHERNET_DEST, ethernetAddressGateway, 6);
|
| 1185 |
|
|
else
|
| 1186 |
|
|
memcpy(ptrSend+ETHERNET_DEST, ethernetAddressPlasma, 6);
|
| 1187 |
|
|
memcpy(ptrSend+ETHERNET_SOURCE, ethernetAddressPlasma, 6);
|
| 1188 |
|
|
ptrSend[ETHERNET_FRAME_TYPE] = 0x08;
|
| 1189 |
|
|
|
| 1190 |
|
|
//Setup IP
|
| 1191 |
|
|
ptrSend[IP_VERSION_LENGTH] = 0x45;
|
| 1192 |
|
|
ptrSend[IP_TIME_TO_LIVE] = 0x80;
|
| 1193 |
|
|
|
| 1194 |
|
|
//Setup IP addresses
|
| 1195 |
|
|
memcpy(ptrSend+IP_SOURCE, ipAddressPlasma, 4);
|
| 1196 |
|
|
ptrSend[IP_DEST] = (uint8)(ipAddress >> 24);
|
| 1197 |
|
|
ptrSend[IP_DEST+1] = (uint8)(ipAddress >> 16);
|
| 1198 |
|
|
ptrSend[IP_DEST+2] = (uint8)(ipAddress >> 8);
|
| 1199 |
|
|
ptrSend[IP_DEST+3] = (uint8)ipAddress;
|
| 1200 |
|
|
ptrRcv[IP_SOURCE] = (uint8)(ipAddress >> 24);
|
| 1201 |
|
|
ptrRcv[IP_SOURCE+1] = (uint8)(ipAddress >> 16);
|
| 1202 |
|
|
ptrRcv[IP_SOURCE+2] = (uint8)(ipAddress >> 8);
|
| 1203 |
|
|
ptrRcv[IP_SOURCE+3] = (uint8)ipAddress;
|
| 1204 |
|
|
memcpy(ptrRcv+IP_DEST, ipAddressPlasma, 4);
|
| 1205 |
|
|
|
| 1206 |
|
|
//Setup ports
|
| 1207 |
|
|
ptrSend[TCP_SOURCE_PORT] = (uint8)(portSource >> 8);
|
| 1208 |
|
|
ptrSend[TCP_SOURCE_PORT+1] = (uint8)portSource;
|
| 1209 |
|
|
ptrSend[TCP_DEST_PORT] = (uint8)(port >> 8);
|
| 1210 |
|
|
ptrSend[TCP_DEST_PORT+1] = (uint8)port;
|
| 1211 |
|
|
ptrRcv[TCP_SOURCE_PORT] = (uint8)(port >> 8);
|
| 1212 |
|
|
ptrRcv[TCP_SOURCE_PORT+1] = (uint8)port;
|
| 1213 |
|
|
ptrRcv[TCP_DEST_PORT] = (uint8)(portSource >> 8);
|
| 1214 |
|
|
ptrRcv[TCP_DEST_PORT+1] = (uint8)portSource;
|
| 1215 |
|
|
++portSource;
|
| 1216 |
|
|
}
|
| 1217 |
|
|
|
| 1218 |
|
|
if(mode == IP_MODE_TCP)
|
| 1219 |
|
|
{
|
| 1220 |
|
|
if(ipAddress)
|
| 1221 |
|
|
socket->state = IP_TCP;
|
| 1222 |
|
|
else
|
| 1223 |
|
|
socket->state = IP_LISTEN;
|
| 1224 |
|
|
ptrSend[IP_PROTOCOL] = 0x06; //TCP
|
| 1225 |
|
|
ptrRcv[IP_PROTOCOL] = 0x06;
|
| 1226 |
|
|
}
|
| 1227 |
|
|
else if(mode == IP_MODE_UDP)
|
| 1228 |
|
|
{
|
| 1229 |
|
|
socket->state = IP_UDP;
|
| 1230 |
|
|
ptrSend[IP_PROTOCOL] = 0x11; //UDP
|
| 1231 |
|
|
ptrRcv[IP_PROTOCOL] = 0x11;
|
| 1232 |
|
|
}
|
| 1233 |
|
|
else if(mode == IP_MODE_PING)
|
| 1234 |
|
|
{
|
| 1235 |
|
|
socket->state = IP_PING;
|
| 1236 |
|
|
ptrSend[IP_PROTOCOL] = 0x01; //PING
|
| 1237 |
|
|
memset(ptrSend+PING_TYPE, 0, 8);
|
| 1238 |
|
|
ptrSend[PING_TYPE] = 8; //SEND
|
| 1239 |
|
|
}
|
| 1240 |
|
|
|
| 1241 |
|
|
//Add socket to linked list
|
| 1242 |
|
|
OS_MutexPend(IPMutex);
|
| 1243 |
|
|
socket->next = SocketHead;
|
| 1244 |
|
|
socket->prev = NULL;
|
| 1245 |
|
|
if(SocketHead)
|
| 1246 |
|
|
SocketHead->prev = socket;
|
| 1247 |
|
|
SocketHead = socket;
|
| 1248 |
|
|
OS_MutexPost(IPMutex);
|
| 1249 |
|
|
|
| 1250 |
|
|
if(mode == IP_MODE_TCP && ipAddress)
|
| 1251 |
|
|
{
|
| 1252 |
|
|
//Send TCP SYN
|
| 1253 |
|
|
socket->seq = 0x01234567;
|
| 1254 |
|
|
frame = IPFrameGet(0);
|
| 1255 |
|
|
if(frame)
|
| 1256 |
|
|
{
|
| 1257 |
|
|
frame->packet[TCP_FLAGS] = TCP_FLAGS_SYN;
|
| 1258 |
|
|
frame->packet[TCP_DATA] = 2; //maximum segment size = 536
|
| 1259 |
|
|
frame->packet[TCP_DATA+1] = 4;
|
| 1260 |
|
|
frame->packet[TCP_DATA+2] = 2;
|
| 1261 |
|
|
frame->packet[TCP_DATA+3] = 24;
|
| 1262 |
|
|
TCPSendPacket(socket, frame, TCP_DATA+4);
|
| 1263 |
|
|
++socket->seq;
|
| 1264 |
|
|
}
|
| 1265 |
|
|
}
|
| 1266 |
|
|
return socket;
|
| 1267 |
|
|
}
|
| 1268 |
|
|
|
| 1269 |
|
|
|
| 1270 |
|
|
void IPWriteFlush(IPSocket *socket)
|
| 1271 |
|
|
{
|
| 1272 |
|
|
uint8 *packetOut;
|
| 1273 |
|
|
if(socket->frameSend && socket->state != IP_UDP &&
|
| 1274 |
|
|
socket->state != IP_PING)
|
| 1275 |
|
|
{
|
| 1276 |
|
|
packetOut = socket->frameSend->packet;
|
| 1277 |
|
|
packetOut[TCP_FLAGS] = TCP_FLAGS_ACK | TCP_FLAGS_PSH;
|
| 1278 |
|
|
TCPSendPacket(socket, socket->frameSend, TCP_DATA + socket->sendOffset);
|
| 1279 |
|
|
socket->seq += socket->sendOffset;
|
| 1280 |
|
|
socket->frameSend = NULL;
|
| 1281 |
|
|
socket->sendOffset = 0;
|
| 1282 |
|
|
}
|
| 1283 |
|
|
}
|
| 1284 |
|
|
|
| 1285 |
|
|
|
| 1286 |
|
|
uint32 IPWrite(IPSocket *socket, const uint8 *buf, uint32 length)
|
| 1287 |
|
|
{
|
| 1288 |
|
|
IPFrame *frameOut;
|
| 1289 |
|
|
uint8 *packetOut;
|
| 1290 |
|
|
uint32 bytes, count=0, tries=0;
|
| 1291 |
|
|
int offset;
|
| 1292 |
|
|
OS_Thread_t *self;
|
| 1293 |
|
|
|
| 1294 |
|
|
if(socket->timeout)
|
| 1295 |
|
|
socket->timeout = socket->timeoutReset;
|
| 1296 |
|
|
|
| 1297 |
361 |
rhoads |
#ifdef INCLUDE_FILESYS
|
| 1298 |
|
|
if(socket->fileOut) //override stdout
|
| 1299 |
|
|
return fwrite((char*)buf, 1, length, socket->fileOut);
|
| 1300 |
|
|
#endif
|
| 1301 |
|
|
|
| 1302 |
353 |
rhoads |
//printf("IPWrite(0x%x, %d)", Socket, Length);
|
| 1303 |
|
|
self = OS_ThreadSelf();
|
| 1304 |
|
|
while(length)
|
| 1305 |
|
|
{
|
| 1306 |
|
|
//Rate limit output
|
| 1307 |
|
|
if(socket->seq - socket->seqReceived >= SEND_WINDOW)
|
| 1308 |
|
|
{
|
| 1309 |
|
|
//printf("l(%d,%d,%d) ", socket->seq - socket->seqReceived, socket->seq, socket->seqReceived);
|
| 1310 |
|
|
if(self != IPThread && ++tries < 200)
|
| 1311 |
|
|
{
|
| 1312 |
|
|
OS_ThreadSleep(1);
|
| 1313 |
|
|
continue;
|
| 1314 |
|
|
}
|
| 1315 |
|
|
}
|
| 1316 |
|
|
tries = 0;
|
| 1317 |
|
|
while(socket->frameSend == NULL)
|
| 1318 |
|
|
{
|
| 1319 |
|
|
socket->frameSend = IPFrameGet(FRAME_COUNT_SEND);
|
| 1320 |
|
|
socket->sendOffset = 0;
|
| 1321 |
|
|
if(socket->frameSend == NULL)
|
| 1322 |
|
|
{
|
| 1323 |
|
|
//printf("L");
|
| 1324 |
|
|
if(self == IPThread || ++tries > 200)
|
| 1325 |
|
|
break;
|
| 1326 |
|
|
else
|
| 1327 |
|
|
OS_ThreadSleep(1);
|
| 1328 |
|
|
}
|
| 1329 |
|
|
}
|
| 1330 |
|
|
frameOut = socket->frameSend;
|
| 1331 |
|
|
offset = socket->sendOffset;
|
| 1332 |
|
|
if(frameOut == NULL)
|
| 1333 |
|
|
break;
|
| 1334 |
|
|
packetOut = frameOut->packet;
|
| 1335 |
|
|
|
| 1336 |
|
|
if(socket->state == IP_PING)
|
| 1337 |
|
|
{
|
| 1338 |
|
|
bytes = length;
|
| 1339 |
|
|
memcpy(packetOut, socket->headerSend, PING_DATA);
|
| 1340 |
|
|
memcpy(packetOut+PING_DATA, buf, bytes);
|
| 1341 |
|
|
IPSendPacket(socket, socket->frameSend, PING_DATA + bytes);
|
| 1342 |
|
|
socket->frameSend = NULL;
|
| 1343 |
|
|
}
|
| 1344 |
|
|
else if(socket->state != IP_UDP)
|
| 1345 |
|
|
{
|
| 1346 |
|
|
bytes = 512 - offset;
|
| 1347 |
|
|
if(bytes > length)
|
| 1348 |
|
|
bytes = length;
|
| 1349 |
|
|
socket->sendOffset += bytes;
|
| 1350 |
|
|
memcpy(packetOut+TCP_DATA+offset, buf, bytes);
|
| 1351 |
|
|
if(socket->sendOffset >= 512)
|
| 1352 |
|
|
IPWriteFlush(socket);
|
| 1353 |
|
|
//if(Socket->seq - Socket->seqReceived > Socket->seqWindow)
|
| 1354 |
|
|
//{
|
| 1355 |
|
|
// printf("W");
|
| 1356 |
|
|
// OS_ThreadSleep(10);
|
| 1357 |
|
|
//}
|
| 1358 |
|
|
}
|
| 1359 |
|
|
else //UDP
|
| 1360 |
|
|
{
|
| 1361 |
|
|
bytes = length;
|
| 1362 |
|
|
memcpy(packetOut+UDP_DATA+offset, buf, bytes);
|
| 1363 |
|
|
memcpy(packetOut, socket->headerSend, UDP_LENGTH);
|
| 1364 |
|
|
IPSendPacket(socket, socket->frameSend, UDP_DATA + bytes);
|
| 1365 |
|
|
socket->frameSend = NULL;
|
| 1366 |
|
|
}
|
| 1367 |
|
|
count += bytes;
|
| 1368 |
|
|
buf += bytes;
|
| 1369 |
|
|
length -= bytes;
|
| 1370 |
|
|
}
|
| 1371 |
|
|
return count;
|
| 1372 |
|
|
}
|
| 1373 |
|
|
|
| 1374 |
|
|
|
| 1375 |
|
|
uint32 IPRead(IPSocket *socket, uint8 *buf, uint32 length)
|
| 1376 |
|
|
{
|
| 1377 |
|
|
IPFrame *frame, *frame2;
|
| 1378 |
|
|
int count=0, bytes, offset;
|
| 1379 |
|
|
|
| 1380 |
361 |
rhoads |
#ifdef INCLUDE_FILESYS
|
| 1381 |
|
|
if(socket->fileIn) //override stdin
|
| 1382 |
|
|
{
|
| 1383 |
|
|
bytes = fread(buf, 1, 1, socket->fileIn);
|
| 1384 |
|
|
if(bytes == 0)
|
| 1385 |
|
|
{
|
| 1386 |
|
|
buf[0] = 0;
|
| 1387 |
|
|
fclose(socket->fileIn);
|
| 1388 |
|
|
socket->fileIn = NULL;
|
| 1389 |
|
|
bytes = 1;
|
| 1390 |
|
|
}
|
| 1391 |
|
|
return bytes;
|
| 1392 |
|
|
}
|
| 1393 |
|
|
#endif
|
| 1394 |
|
|
|
| 1395 |
353 |
rhoads |
if(socket->state == IP_UDP)
|
| 1396 |
|
|
offset = UDP_DATA;
|
| 1397 |
|
|
else
|
| 1398 |
|
|
offset = TCP_DATA;
|
| 1399 |
|
|
|
| 1400 |
|
|
OS_MutexPend(IPMutex);
|
| 1401 |
|
|
for(frame = socket->frameReadTail; length && frame; )
|
| 1402 |
|
|
{
|
| 1403 |
|
|
bytes = frame->length - offset - socket->readOffset;
|
| 1404 |
|
|
if(bytes > (int)length)
|
| 1405 |
|
|
bytes = length;
|
| 1406 |
|
|
memcpy(buf, frame->packet + offset + socket->readOffset, bytes);
|
| 1407 |
|
|
buf += bytes;
|
| 1408 |
|
|
socket->readOffset += bytes;
|
| 1409 |
|
|
length -= bytes;
|
| 1410 |
|
|
count += bytes;
|
| 1411 |
|
|
|
| 1412 |
|
|
//Check if done with packet
|
| 1413 |
|
|
frame2 = frame;
|
| 1414 |
|
|
frame = frame->prev;
|
| 1415 |
|
|
if(socket->readOffset == frame2->length - offset)
|
| 1416 |
|
|
{
|
| 1417 |
|
|
//Remove packet from socket linked list
|
| 1418 |
|
|
socket->readOffset = 0;
|
| 1419 |
|
|
FrameRemove(&socket->frameReadHead, &socket->frameReadTail, frame2);
|
| 1420 |
|
|
socket->ackProcessed += frame2->length - offset;
|
| 1421 |
|
|
if(socket->state == IP_TCP &&
|
| 1422 |
|
|
socket->ack - socket->ackProcessed > RECEIVE_WINDOW - 2048)
|
| 1423 |
|
|
{
|
| 1424 |
|
|
//Update receive window for flow control
|
| 1425 |
|
|
frame2->packet[TCP_FLAGS] = TCP_FLAGS_ACK;
|
| 1426 |
|
|
TCPSendPacket(socket, frame2, TCP_DATA);
|
| 1427 |
|
|
}
|
| 1428 |
|
|
else
|
| 1429 |
|
|
FrameFree(frame2);
|
| 1430 |
|
|
}
|
| 1431 |
|
|
}
|
| 1432 |
|
|
OS_MutexPost(IPMutex);
|
| 1433 |
|
|
return count;
|
| 1434 |
|
|
}
|
| 1435 |
|
|
|
| 1436 |
|
|
|
| 1437 |
|
|
static void IPClose2(IPSocket *socket)
|
| 1438 |
|
|
{
|
| 1439 |
|
|
IPFrame *frame, *framePrev;
|
| 1440 |
|
|
|
| 1441 |
|
|
OS_MutexPend(IPMutex);
|
| 1442 |
|
|
|
| 1443 |
|
|
//Mark packets as don't retransmit
|
| 1444 |
|
|
for(frame = FrameSendHead; frame; frame = frame->next)
|
| 1445 |
|
|
{
|
| 1446 |
|
|
if(frame->socket == socket)
|
| 1447 |
|
|
frame->socket = NULL;
|
| 1448 |
|
|
}
|
| 1449 |
|
|
|
| 1450 |
|
|
//Remove packets from retransmision list
|
| 1451 |
|
|
for(frame = FrameResendHead; frame; )
|
| 1452 |
|
|
{
|
| 1453 |
|
|
framePrev = frame;
|
| 1454 |
|
|
frame = frame->next;
|
| 1455 |
|
|
if(framePrev->socket == socket)
|
| 1456 |
|
|
{
|
| 1457 |
|
|
FrameRemove(&FrameResendHead, &FrameResendTail, framePrev);
|
| 1458 |
|
|
FrameFree(framePrev);
|
| 1459 |
|
|
}
|
| 1460 |
|
|
}
|
| 1461 |
|
|
|
| 1462 |
|
|
//Remove packets from socket read linked list
|
| 1463 |
|
|
for(frame = socket->frameReadHead; frame; )
|
| 1464 |
|
|
{
|
| 1465 |
|
|
framePrev = frame;
|
| 1466 |
|
|
frame = frame->next;
|
| 1467 |
|
|
FrameRemove(&socket->frameReadHead, &socket->frameReadTail, framePrev);
|
| 1468 |
|
|
FrameFree(framePrev);
|
| 1469 |
|
|
}
|
| 1470 |
|
|
|
| 1471 |
|
|
//Remove socket
|
| 1472 |
|
|
if(socket->state == IP_CLOSED || socket->state <= IP_UDP)
|
| 1473 |
|
|
{
|
| 1474 |
|
|
if(socket->prev == NULL)
|
| 1475 |
|
|
SocketHead = socket->next;
|
| 1476 |
|
|
else
|
| 1477 |
|
|
socket->prev->next = socket->next;
|
| 1478 |
|
|
if(socket->next)
|
| 1479 |
|
|
socket->next->prev = socket->prev;
|
| 1480 |
|
|
free(socket);
|
| 1481 |
|
|
}
|
| 1482 |
|
|
else
|
| 1483 |
|
|
{
|
| 1484 |
|
|
//Give application 10 seconds to stop using socket
|
| 1485 |
|
|
if(socket->state > IP_UDP)
|
| 1486 |
|
|
socket->state = IP_CLOSED;
|
| 1487 |
|
|
socket->timeout = 10;
|
| 1488 |
|
|
}
|
| 1489 |
|
|
OS_MutexPost(IPMutex);
|
| 1490 |
|
|
}
|
| 1491 |
|
|
|
| 1492 |
|
|
|
| 1493 |
|
|
void IPClose(IPSocket *socket)
|
| 1494 |
|
|
{
|
| 1495 |
|
|
IPFrame *frameOut;
|
| 1496 |
|
|
|
| 1497 |
|
|
IPWriteFlush(socket);
|
| 1498 |
|
|
if(socket->state <= IP_UDP)
|
| 1499 |
|
|
{
|
| 1500 |
|
|
IPClose2(socket);
|
| 1501 |
|
|
return;
|
| 1502 |
|
|
}
|
| 1503 |
|
|
frameOut = IPFrameGet(0);
|
| 1504 |
|
|
if(frameOut == NULL)
|
| 1505 |
|
|
return;
|
| 1506 |
|
|
frameOut->packet[TCP_FLAGS] = TCP_FLAGS_FIN | TCP_FLAGS_ACK;
|
| 1507 |
|
|
TCPSendPacket(socket, frameOut, TCP_DATA);
|
| 1508 |
|
|
++socket->seq;
|
| 1509 |
|
|
if(socket->state == IP_FIN_CLIENT)
|
| 1510 |
|
|
IPClose2(socket);
|
| 1511 |
|
|
else
|
| 1512 |
|
|
socket->state = IP_FIN_SERVER;
|
| 1513 |
|
|
}
|
| 1514 |
|
|
|
| 1515 |
|
|
|
| 1516 |
|
|
void IPPrintf(IPSocket *socket, char *message,
|
| 1517 |
|
|
int arg0, int arg1, int arg2, int arg3)
|
| 1518 |
|
|
{
|
| 1519 |
|
|
char buf[500];
|
| 1520 |
|
|
if(socket == NULL)
|
| 1521 |
|
|
{
|
| 1522 |
|
|
printf(message, arg0, arg1, arg2, arg3);
|
| 1523 |
|
|
return;
|
| 1524 |
|
|
}
|
| 1525 |
|
|
if(strcmp(message, "%s") == 0)
|
| 1526 |
|
|
IPWrite(socket, (uint8*)arg0, (int)strlen((char*)arg0));
|
| 1527 |
|
|
else
|
| 1528 |
|
|
{
|
| 1529 |
|
|
sprintf(buf, message, arg0, arg1, arg2, arg3, 0, 0, 0, 0);
|
| 1530 |
|
|
IPWrite(socket, (uint8*)buf, (int)strlen(buf));
|
| 1531 |
|
|
}
|
| 1532 |
|
|
if(socket->dontFlush == 0 || strstr(message, "\n"))
|
| 1533 |
|
|
IPWriteFlush(socket);
|
| 1534 |
|
|
}
|
| 1535 |
|
|
|
| 1536 |
|
|
|
| 1537 |
|
|
void IPTick(void)
|
| 1538 |
|
|
{
|
| 1539 |
|
|
IPFrame *frame, *frame2;
|
| 1540 |
|
|
IPSocket *socket, *socket2;
|
| 1541 |
|
|
unsigned long ticks;
|
| 1542 |
|
|
static unsigned long ticksPrev=0, ticksPrev2=0;
|
| 1543 |
|
|
|
| 1544 |
|
|
ticks = OS_ThreadTime();
|
| 1545 |
|
|
#ifdef WIN32
|
| 1546 |
|
|
ticks = ticksPrev + 100;
|
| 1547 |
|
|
#endif
|
| 1548 |
|
|
if(ticks - ticksPrev >= 95)
|
| 1549 |
|
|
{
|
| 1550 |
|
|
if(IPVerbose && (Seconds % 60) == 0)
|
| 1551 |
|
|
{
|
| 1552 |
|
|
if(FrameFreeCount >= FRAME_COUNT-1)
|
| 1553 |
|
|
printf("T");
|
| 1554 |
|
|
else
|
| 1555 |
|
|
printf("T(%d)", FrameFreeCount);
|
| 1556 |
|
|
}
|
| 1557 |
|
|
++Seconds;
|
| 1558 |
|
|
if(--DhcpRetrySeconds <= 0)
|
| 1559 |
|
|
IPDhcp(NULL, 400, 1); //DHCP request
|
| 1560 |
|
|
}
|
| 1561 |
|
|
|
| 1562 |
|
|
OS_MutexPend(IPMutex);
|
| 1563 |
|
|
|
| 1564 |
|
|
//Retransmit timeout packets
|
| 1565 |
|
|
for(frame = FrameResendHead; frame; )
|
| 1566 |
|
|
{
|
| 1567 |
|
|
frame2 = frame;
|
| 1568 |
|
|
frame = frame->next;
|
| 1569 |
|
|
frame2->timeout = (short)(frame2->timeout - (ticks - ticksPrev2));
|
| 1570 |
|
|
if(--frame2->timeout <= 0)
|
| 1571 |
|
|
{
|
| 1572 |
|
|
if(IPVerbose)
|
| 1573 |
|
|
printf("r");
|
| 1574 |
|
|
FrameRemove(&FrameResendHead, &FrameResendTail, frame2);
|
| 1575 |
|
|
IPSendFrame(frame2);
|
| 1576 |
|
|
}
|
| 1577 |
|
|
}
|
| 1578 |
|
|
|
| 1579 |
|
|
if(ticks - ticksPrev >= 95)
|
| 1580 |
|
|
{
|
| 1581 |
|
|
//Close timed out sockets
|
| 1582 |
|
|
for(socket = SocketHead; socket; )
|
| 1583 |
|
|
{
|
| 1584 |
|
|
socket2 = socket;
|
| 1585 |
|
|
socket = socket->next;
|
| 1586 |
|
|
if(socket2->timeout && --socket2->timeout == 0)
|
| 1587 |
|
|
{
|
| 1588 |
|
|
socket2->timeout = 10;
|
| 1589 |
|
|
if(IPVerbose && socket2->state != IP_CLOSED &&
|
| 1590 |
|
|
socket2->state != IP_FIN_SERVER)
|
| 1591 |
|
|
printf("t(%d,%d)", socket2->state, FrameFreeCount);
|
| 1592 |
|
|
if(socket2->state == IP_TCP)
|
| 1593 |
|
|
IPClose(socket2);
|
| 1594 |
|
|
else if(socket2->state == IP_FIN_CLIENT)
|
| 1595 |
|
|
IPClose(socket2);
|
| 1596 |
|
|
else
|
| 1597 |
|
|
IPClose2(socket2);
|
| 1598 |
|
|
}
|
| 1599 |
|
|
}
|
| 1600 |
|
|
ticksPrev = ticks;
|
| 1601 |
|
|
}
|
| 1602 |
|
|
OS_MutexPost(IPMutex);
|
| 1603 |
|
|
ticksPrev2 = ticks;
|
| 1604 |
|
|
}
|
| 1605 |
|
|
|
| 1606 |
|
|
|
| 1607 |
|
|
static void DnsCallback(IPSocket *socket)
|
| 1608 |
|
|
{
|
| 1609 |
|
|
uint8 buf[200], *ptr;
|
| 1610 |
|
|
uint32 ipAddress;
|
| 1611 |
|
|
int bytes;
|
| 1612 |
|
|
|
| 1613 |
|
|
memset(buf, 0, sizeof(buf));
|
| 1614 |
|
|
bytes = IPRead(socket, buf, sizeof(buf));
|
| 1615 |
|
|
if(buf[DNS_NUM_ANSWERS_RR+1])
|
| 1616 |
|
|
{
|
| 1617 |
|
|
for(ptr = buf + DNS_QUESTIONS; ptr + 14 <= buf + bytes; ++ptr)
|
| 1618 |
|
|
{
|
| 1619 |
|
|
if(ptr[0] == 0 && ptr[1] == 1 && ptr[2] == 0 && ptr[3] == 1 &&
|
| 1620 |
|
|
ptr[8] == 0 && ptr[9] == 4)
|
| 1621 |
|
|
{
|
| 1622 |
|
|
ipAddress = (ptr[10] << 24) | (ptr[11] << 16) | (ptr[12] << 8) | ptr[13];
|
| 1623 |
|
|
printf("ipAddress = %d.%d.%d.%d\n", ptr[10], ptr[11], ptr[12], ptr[13]);
|
| 1624 |
|
|
socket->userData = ipAddress;
|
| 1625 |
|
|
if(socket->userFunc)
|
| 1626 |
|
|
{
|
| 1627 |
|
|
socket->userFunc(socket, ipAddress, socket->userPtr);
|
| 1628 |
|
|
}
|
| 1629 |
|
|
break;
|
| 1630 |
|
|
}
|
| 1631 |
|
|
}
|
| 1632 |
|
|
}
|
| 1633 |
|
|
IPClose(socket);
|
| 1634 |
|
|
}
|
| 1635 |
|
|
|
| 1636 |
|
|
|
| 1637 |
|
|
void IPResolve(char *name, IPFuncPtr resolvedFunc, void *arg)
|
| 1638 |
|
|
{
|
| 1639 |
|
|
uint8 buf[200], *ptr;
|
| 1640 |
|
|
int length, i;
|
| 1641 |
|
|
IPSocket *socket;
|
| 1642 |
|
|
|
| 1643 |
|
|
socket = IPOpen(IP_MODE_UDP, ipAddressDns, DNS_PORT, DnsCallback);
|
| 1644 |
|
|
memset(buf, 0, sizeof(buf));
|
| 1645 |
|
|
buf[DNS_ID+1] = 1;
|
| 1646 |
|
|
buf[DNS_FLAGS] = 1;
|
| 1647 |
|
|
buf[DNS_NUM_QUESTIONS+1] = 1;
|
| 1648 |
|
|
|
| 1649 |
|
|
//Setup name
|
| 1650 |
|
|
ptr = buf + DNS_QUESTIONS;
|
| 1651 |
|
|
strncpy((char*)ptr+1, name, 100);
|
| 1652 |
|
|
ptr[0] = 1;
|
| 1653 |
|
|
while(ptr[0])
|
| 1654 |
|
|
{
|
| 1655 |
|
|
for(i = 0; i < 100; ++i)
|
| 1656 |
|
|
{
|
| 1657 |
|
|
if(ptr[i+1] == '.' || ptr[i+1] == 0)
|
| 1658 |
|
|
{
|
| 1659 |
|
|
ptr[0] = (uint8)i;
|
| 1660 |
|
|
ptr += i+1;
|
| 1661 |
|
|
break;
|
| 1662 |
|
|
}
|
| 1663 |
|
|
}
|
| 1664 |
|
|
}
|
| 1665 |
|
|
++ptr;
|
| 1666 |
|
|
ptr[1] = DNS_QUERY_TYPE_IP;
|
| 1667 |
|
|
ptr[3] = DNS_QUERY_CLASS;
|
| 1668 |
|
|
length = (int)(ptr - buf) + 4;
|
| 1669 |
|
|
if(length < 60)
|
| 1670 |
|
|
length = 60;
|
| 1671 |
|
|
|
| 1672 |
|
|
socket->userFunc = (IPFuncPtr)resolvedFunc;
|
| 1673 |
|
|
socket->userPtr = arg;
|
| 1674 |
|
|
socket->userData = 0;
|
| 1675 |
|
|
IPWrite(socket, buf, length);
|
| 1676 |
|
|
}
|
| 1677 |
|
|
|
