3 /*-
4  * SPDX-License-Identifier: BSD-2-Clause
56 	channel_t *chan;  in tap_init()  local
62 	if (fd == -1) {  in tap_init()
68 	if (ioctl(fd, TAPGIFNAME, &ifr) == -1) {  in tap_init()
69 		log_err("Could not get interface name: %m");  in tap_init()
74 	if (s == -1) {  in tap_init()
83 	if (ioctl(s, SIOCSIFLLADDR, &ifr) == -1) {  in tap_init()
88 	if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {  in tap_init()
96 		if (ioctl(s, SIOCSIFFLAGS, &ifr) == -1) {  in tap_init()
107 	chan = channel_alloc();  in tap_init()
108 	if (chan == NULL)  in tap_init()
111 	chan->send = tap_send;  in tap_init()
112 	chan->recv = tap_recv;  in tap_init()
113 	chan->mru = ETHER_HDR_LEN + ETHER_MAX_LEN;  in tap_init()
114 	memcpy(chan->raddr, ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);  in tap_init()
115 	memcpy(chan->laddr, ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);  in tap_init()
116 	chan->state = CHANNEL_OPEN;  in tap_init()
117 	if (!channel_open(chan, fd))  in tap_init()
122 	chan->pfh = pidfile_open(pidfile, 0600, NULL);  in tap_init()
123 	if (chan->pfh == NULL)  in tap_init()
125 	else if (pidfile_write(chan->pfh) < 0) {  in tap_init()
127 		pidfile_remove(chan->pfh);  in tap_init()
128 		chan->pfh = NULL;  in tap_init()
133 tap_send(channel_t *chan, packet_t *pkt)  in tap_send()  argument
138 	iov[0].iov_base = pkt->dst;  in tap_send()
140 	iov[1].iov_base = pkt->src;  in tap_send()
142 	iov[2].iov_base = pkt->type;  in tap_send()
144 	iov[3].iov_base = pkt->ptr;  in tap_send()
145 	iov[3].iov_len = pkt->len;  in tap_send()
148 	nw = writev(chan->fd, iov, __arraycount(iov));  in tap_send()
158 	if (pkt->len < ETHER_HDR_LEN)  in tap_recv()
161 	pkt->dst = pkt->ptr;  in tap_recv()
163 	pkt->src = pkt->ptr;  in tap_recv()
165 	pkt->type = pkt->ptr;  in tap_recv()