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25#include "qemu/osdep.h"
26#include "slirp.h"
27
28void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN])
29{
30 const uint32_t broadcast_addr =
31 ~slirp->vnetwork_mask.s_addr | slirp->vnetwork_addr.s_addr;
32 ArpTable *arptbl = &slirp->arp_table;
33 int i;
34
35 DEBUG_CALL("arp_table_add");
36 DEBUG_ARG("ip = 0x%x", ip_addr);
37 DEBUG_ARGS((dfd, " hw addr = %02x:%02x:%02x:%02x:%02x:%02x\n",
38 ethaddr[0], ethaddr[1], ethaddr[2],
39 ethaddr[3], ethaddr[4], ethaddr[5]));
40
41 if (ip_addr == 0 || ip_addr == 0xffffffff || ip_addr == broadcast_addr) {
42
43 return;
44 }
45
46
47 for (i = 0; i < ARP_TABLE_SIZE; i++) {
48 if (arptbl->table[i].ar_sip == ip_addr) {
49
50 memcpy(arptbl->table[i].ar_sha, ethaddr, ETH_ALEN);
51 return;
52 }
53 }
54
55
56 arptbl->table[arptbl->next_victim].ar_sip = ip_addr;
57 memcpy(arptbl->table[arptbl->next_victim].ar_sha, ethaddr, ETH_ALEN);
58 arptbl->next_victim = (arptbl->next_victim + 1) % ARP_TABLE_SIZE;
59}
60
61bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
62 uint8_t out_ethaddr[ETH_ALEN])
63{
64 const uint32_t broadcast_addr =
65 ~slirp->vnetwork_mask.s_addr | slirp->vnetwork_addr.s_addr;
66 ArpTable *arptbl = &slirp->arp_table;
67 int i;
68
69 DEBUG_CALL("arp_table_search");
70 DEBUG_ARG("ip = 0x%x", ip_addr);
71
72
73 if (ip_addr == 0xffffffff || ip_addr == broadcast_addr) {
74
75 memset(out_ethaddr, 0xff, ETH_ALEN);
76 return 1;
77 }
78
79 for (i = 0; i < ARP_TABLE_SIZE; i++) {
80 if (arptbl->table[i].ar_sip == ip_addr) {
81 memcpy(out_ethaddr, arptbl->table[i].ar_sha, ETH_ALEN);
82 DEBUG_ARGS((dfd, " found hw addr = %02x:%02x:%02x:%02x:%02x:%02x\n",
83 out_ethaddr[0], out_ethaddr[1], out_ethaddr[2],
84 out_ethaddr[3], out_ethaddr[4], out_ethaddr[5]));
85 return 1;
86 }
87 }
88
89 return 0;
90}
91