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; }