void ax25_transmit_buffer(ax25_cb *ax25, struct sk_buff *skb, int type)
{
struct sk_buff *skbn;
unsigned char *ptr;
int headroom;
if (ax25->ax25_dev == NULL) {
ax25_disconnect(ax25, ENETUNREACH);
return;
}
headroom = ax25_addr_size(ax25->digipeat);
if (skb_headroom(skb) < headroom) {
if ((skbn = skb_realloc_headroom(skb, headroom)) == NULL) {
printk(KERN_CRIT "AX.25: ax25_transmit_buffer - out of memory\n");
kfree_skb(skb);
return;
}
if (skb->sk != NULL)
skb_set_owner_w(skbn, skb->sk);
kfree_skb(skb);
skb = skbn;
}
ptr = skb_push(skb, headroom);
ax25_addr_build(ptr, &ax25->source_addr, &ax25->dest_addr, ax25->digipeat, type, ax25->modulus);
ax25_queue_xmit(skb, ax25->ax25_dev->dev);
}
struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src,
ax25_address *dest, ax25_digi *digi)
{
struct sk_buff *skbn;
unsigned char *bp;
int len;
len = digi->ndigi * AX25_ADDR_LEN;
if (skb_headroom(skb) < len) {
if ((skbn = skb_realloc_headroom(skb, len)) == NULL) {
printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
return NULL;
}
if (skb->sk != NULL)
skb_set_owner_w(skbn, skb->sk);
consume_skb(skb);
skb = skbn;
}
bp = skb_push(skb, len);
ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
return skb;
}