Uboot ARP Address resolution

Common/cmd_cache.c

int Do_getmac (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) {//usend d43d7e45371c 192.168.1.134 1234 1234 Hhaachar ET  Hsrc[6]={0xff, 0xFF, 0xFF, 0xFF, 0xFF, 0xff};char ethdst[6]={0xff, 0xFF, 0xFF, 0xFF, 0xFF, 0xff};_getmac (ARGV[2],ETHSRC); Getmacfromipaddress (ARGV[1],ETHDST,ARGV[3],ETHSRC);//printf ("%s mac  is%x%x%x%x\n", argv[1],eth[0],eth[1] , Eth[2],eth[3],eth[4],eth[5]); return 0;}  U_boot_cmd (Getmac, 6, 1, Do_getmac, "loadable FPGA image Support", "[Operation type] [device number] [image address] [image Size]\n ");

Common/tftp.c

int global_raw_reveive = 0;void getmacfromipaddress (const char*  remoteip, char* remoteeth,const char* ourip,char* Oureth) {/* and do the ARP request */ipaddr_t Remoteip;   ipaddr_t MyIP;   remoteip=  string_to_ip (REMOTEIP);  MyIP = String_to_ip (Ourip);  Arprequestsend (REMOTEIP,OURETH,MYIP); global_raw_reveive = 1;eth_rx (); global_raw_reveive = 0;//NetRxPacket = inpkt;// Netrxpacketlen = Len;//printbuffer ((unsigned char*) netrxpacket,netrxpacketlen);//_printarp ((unsigned char*) Netrxpacket,netrxpacketlen); return 1;/* waiting */}

Net/net.c

void arprequestsend (ipaddr_t remoteip,char* oureth,ipaddr_t ourip) {int I;volatile Uchar *PKT; arp_t *ARP;PKT = nettxpacket;pkt + = Netsetether (PKT, netbcastaddr, prot_arp); arp = (arp_t *) pkt;arp->ar_hrd = htons (ar P_ether); Arp->ar_pro = Htons (prot_ip); arp->ar_hln = 6;ARP->AR_PLN = 4;arp->ar_op = Htons (arpop_request);/* SOURCE ET addr */memcpy (&arp->ar_data[0], oureth, 6);/* source IP addr */netwriteip ((Uchar *) &arp->ar_data [6], Ourip); for (i = ten; i <; ++i) {/* dest ET addr = 0 */arp->ar_data[i] = 0;} NETWRITEIP ((Uchar *) &arp->ar_data[16], REMOTEIP);(void) Eth_send (Nettxpacket, (pkt-nettxpacket) + ARP_HDR_ SIZE);} 

Voidnetreceive (volatile uchar *inpkt, int len) {ethernet_t *et;ip_t*ip; arp_t*arp;ipaddr_t tmp;ipaddr_t Src_ip;intx;uchar *pkt; #if defined (CONFIG_CMD_CDP) int iscdp; #endifushort CTI = 0, Vlanid = Vlan_none, Myvlanid, Mynvlanid;debug ("Packet received.%d\n", Len); Netrxpacket = INPKT; Netrxpacketlen = Len;et = (ethernet_t *) inpkt;<span style= "color: #FF0000;" >if (global_raw_reveive) {//global_raw_reveive=0;printpacket ((ethernet_t *) netrxpacket,len); return;} </span>

Driver/net/cpsw.c

void Printbuffer (unsigned char* buffer, int len) {int i;for (i=0;i<len;i++) {printf ("%2.2x", buffer[i]); if ((i&15) ==15) printf ("\ n");} printf ("\ n");} #define PRINTHEX (A, b) printf (#b # # "=%x\n", a->b); void Printarp (arp_t * arp,int len) {//ushortar_hrd;/* Format of Hardware address*///ushortar_pro;/* Format of protocol address*///ucharar_hln;/* Length of hardware address*///Ucharar_ pln;/* Length of protocol address*///ushortar_op;/* operation*///ucharar_data[0];p rinthex (ARP,AR_HRD);p Rinthex (ARP, Ar_pro);p Rinthex (ARP,AR_HLN);p Rinthex (ARP,AR_PLN);p Rinthex (arp,ar_op);p rintf ("mac_src%x%x-%x%x\n",arp-> AR_DATA[0],ARP-&GT;AR_DATA[1],ARP-&GT;AR_DATA[2],ARP-&GT;AR_DATA[3],ARP-&GT;AR_DATA[4],ARP-&GT;AR_DATA[5]); printf ("Ip_src%x%x%x\n", arp->ar_data[6],arp->ar_data[7],arp->ar_data[8],arp->ar_data[9]);p rintf ( "Mac_dst%x%x%x%x%x\n", arp->ar_data[10],arp->ar_data[11],arp->ar_data[12],arp->ar_data[13],arp- &GT;AR_DATA[14],ARP-&GT;AR_DATA[15]);p rintf ("IP_DST%x%x%x%x\n ", arp->ar_data[16],arp->ar_data[17],arp->ar_data[18],arp->ar_data[19]);} int Printpacket (ethernet_t* eth,int len) {//typedef struct {//ucharet_dest[6];/* Destination node*///ucharet_src[6];/* Source node*///ushortet_protlen;/* Protocol or length*///ucharet_dsap;/* 802 dsap*///ucharet_ssap;/* 802 SSAP*///Uchar et_ctl;/* 802 control*///ucharet_snap1;/* snap*///ucharet_snap2;//ucharet_snap3;//ushortet_prot;/* 802 protocol*/// } ethernet_t;printbuffer ((unsigned char*) eth,len);p rintf ("\net_dest%.2x%.2x%.2x%.2x%.2x%.2x\n", eth->et_dest[0 ],ETH-&GT;ET_DEST[1],ETH-&GT;ET_DEST[2],ETH-&GT;ET_DEST[3],ETH-&GT;ET_DEST[4],ETH-&GT;ET_DEST[5]);p rintf ("et_ SRC%.2x%.2x%.2x%.2x%.2x%.2x\n ", eth->et_src[0],eth->et_src[1],eth->et_src[2],eth->et_src[3],eth- &GT;ET_SRC[4],ETH-&GT;ET_SRC[5]), if (Isnotvlan ()) {printf ("Et_protlen%x", Eth->et_protlen);p rintf ("Et_dsap%x\n ", Eth->et_dsap);p rintf (" Et_ssap%x\n ", Eth->et_ssap);p rintf (" Et_ctl%x\n ", etH-&GT;ET_CTL);p rintf ("Et_snap1%x\n", Eth->et_snap1);p rintf ("Et_snap2%x\n", ETH-&GT;ET_SNAP2);p rintf ("et_snap3 %x\n ", eth->et_snap3);p rintf (" Et_prot%x\n ", Eth->et_prot); switch (eth->et_protlen) {Case 0x608:printf (" Prot_arp ");p rintarp ((arp_t *) ((unsigned char*) eth+ether_hdr_size); Len-ether_hdr_size break;case (" 0x8:printf _ip ");p Rintip ((ip_t *) ((unsigned char*) eth+ether_hdr_size); Len-ether_hdr_size break;case (" 0x3680:printf RARP ");p rintarp ((arp_t *) ((unsigned char*) eth+ether_hdr_size); Len-ether_hdr_size break;case (" 0x81:printf VLAN "); break;} printf ("\ n"); return ether_hdr_size;} else{vlan_ethernet_t *veth = (vlan_ethernet_t *) eth;//ucharvet_dest[6];/* Destination node*///ucharvet_src[6];/* Source node*///ushortvet_vlan_type;/* prot_vlan*///ushortvet_tag;/* tag of vlan*///ushortvet_type;/* protocol type*/ printf ("Vet_vlan_type%x\n", Veth->vet_vlan_type);p rintf ("Vet_tag%x\n", Veth->vet_tag);p rintf ("Vet_type%x\n ", Veth->vet_type); return VLAN_ETHER_HDR_size;}} void Printip (ip_t* ip,int len) {//typedef struct {//ucharip_hl_v;/* header length and version*///ucharip_tos;/* type of service*///ushortip_len;/* Total length*///ushortip_id;/* identification*///ushortip_off;/* fragment offset field*// /ucharip_ttl;/* time to live*///ucharip_p;/* protocol*///ushortip_sum;/* checksum*///ipaddr_tip_src;/* Source IP addre  ss*///ipaddr_tip_dst;/* Destination IP address*///ushortudp_src;/* UDP source port*///ushortudp_dst;/* UDP Destination port*///ushortudp_len;/* Length of UDP packet*///ushortudp_xsum;/* checksum*///} ip_t;printf ("Ip_hl_v%x\n", Ip->ip _hl_v);p rintf ("Ip_tos%x\n", Ip->ip_tos);p rintf ("Ip_len%x\n", Ip->ip_len);p rintf ("ip_id%x\n", ip->ip_id); printf ("Ip_off%x\n", Ip->ip_off);p rintf ("Ip_ttl%x\n", Ip->ip_ttl);p rintf ("Ip_p%x\n", ip->ip_p);p rintf (" Ip_sum%x\n ", ip->ip_sum), if (17==ip->ip_p) {unsigned char* p1;printf (" udp\n ");p rintf (" Udp_src%x\n ", ip->udp _SRC);p rintf ("Udp_dst%x\n", IP-&GT;UDP_DST);p RinTF ("Udp_len%x\n", Ip->udp_len);p rintf ("Udp_xsum%x\n", ip->udp_xsum);p 1 = (unsigned char*) &ip->ip_src; printf ("Ip_src%d%d%d%d\n", p1[0],p1[1],p1[2],p1[3]);p 1 = (unsigned char*) &ip->ip_dst;printf ("Ip_dst%d%d%d%d") \ n ", p1[0],p1[1],p1[2],p1[3]);} else if (1==ip->ip_p) {printf ("icmp\n");}}

static int cpsw_send (struct eth_device *dev, volatile void *packet, int length) {struct Cpsw_priv*priv = dev->priv;void *buffer;int len;int status;int i;<span style= "color: #FF0000;" >unsigned char* p= (unsigned char*) packet;  ethernet_t *et = (ethernet_t *) p;ip_t *IP = (ip_t *) (p+ether_hdr_size);p rintf ("cpsw_send:length=%x\n", length);//00 0c 29 6a 4e//p[0]=0;//p[1]=0xc;//p[2]=0x29;//p[3]=0x6a;//p[4]=0x86;//p[5]=0x4e;printpacket (et,length);p rintf (" beging send ... \ n ");</span>

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Uboot ARP Address resolution