Removal MTU size limitation

[l2tpns.git] / arp.c

diff --git a/arp.c b/arp.c
index 122880a..0aae069 100644 (file)
--- a/arp.c
+++ b/arp.c
@@ -1,9 +1,13 @@
+// L2TPNS: arp
+
 #include <string.h>
 #include <unistd.h>
 #include <net/ethernet.h>
 #include <net/if_arp.h>
 #include <linux/if_packet.h>
+#include <netinet/ip6.h>
 
+#include "dhcp6.h"
 #include "l2tpns.h"
 
 /* Most of this code is based on keepalived:vrrp_arp.c */
@@ -14,17 +18,20 @@ struct arp_buf {
 
        /* Data bit - variably sized, so not present in |struct arphdr| */
        unsigned char ar_sha[ETH_ALEN]; /* Sender hardware address */
-       ipt ar_sip;                     /* Sender IP address. */
+       in_addr_t ar_sip;               /* Sender IP address. */
        unsigned char ar_tha[ETH_ALEN]; /* Target hardware address */
-       ipt ar_tip;                     /* Target ip */
+       in_addr_t ar_tip;               /* Target ip */
 } __attribute__((packed));
 
-void sendarp(int ifr_idx, const unsigned char* mac, ipt ip)
+void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip)
 {
        int fd;
        struct sockaddr_ll sll;
        struct arp_buf buf;
 
+       CSTAT(sendarp);
+       STAT(arp_sent);
+
        /* Ethernet */
        memset(buf.eth.ether_dhost, 0xFF, ETH_ALEN);
        memcpy(buf.eth.ether_shost, mac, ETH_ALEN);
@@ -42,15 +49,16 @@ void sendarp(int ifr_idx, const unsigned char* mac, ipt ip)
        memcpy(&buf.ar_sip, &ip, sizeof(ip));
        memcpy(buf.ar_tha, mac, ETH_ALEN);
        memcpy(&buf.ar_tip, &ip, sizeof(ip));
-       
+
        /* Now actually send the thing */
        fd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_RARP));
 
        memset(&sll, 0, sizeof(sll));
        sll.sll_family = AF_PACKET;
-       strncpy(sll.sll_addr, mac, sizeof(sll.sll_addr)); /* Null-pad */
+       memcpy(sll.sll_addr, mac, sizeof(sll.sll_addr) - 1);
        sll.sll_halen = ETH_ALEN;
        sll.sll_ifindex = ifr_idx;
 
        sendto(fd, &buf, sizeof(buf), 0, (struct sockaddr*)&sll, sizeof(sll));
+       close(fd);
 }