net/ipv4/ip_output.c

455 /* Note: skb->sk can be different from sk, in case of tunnels */
553 static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
555 	to->pkt_type = from->pkt_type;
556 	to->priority = from->priority;
557 	to->protocol = from->protocol;
558 	to->skb_iif = from->skb_iif;
560 	skb_dst_copy(to, from);
561 	to->dev = from->dev;
562 	to->mark = from->mark;
564 	skb_copy_hash(to, from);
567 	to->tc_index = from->tc_index;
569 	nf_copy(to, from);
570 	skb_ext_copy(to, from);
572 	to->ipvs_property = from->ipvs_property;
574 	skb_copy_secmark(to, from);
656 	state->ptr = hlen;		/* Where to start from */
663 static void ip_frag_ipcb(struct sk_buff *from, struct sk_buff *to,
667 	IPCB(to)->flags = IPCB(from)->flags;
676 		ip_options_fragment(from);
849 					 * coming from __ip_make_skb(),
934 ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb)
936 	struct msghdr *msg = from;
956 			    int getfrag(void *from, char *to, int offset,
958 			    void *from, int length, int transhdrlen,
1009 		struct msghdr *msg = from;
1166 			if (copy > 0 && getfrag(from, data + transhdrlen, offset, copy, fraggap, skb) < 0) {
1210 			if (getfrag(from, skb_put(skb, copy),
1217 			struct msghdr *msg = from;
1249 			if (getfrag(from,
1259 			err = skb_zerocopy_iter_dgram(skb, from, copy);
1334  *	ip_append_data() can make one large IP datagram from many pieces of
1345 		   int getfrag(void *from, char *to, int offset, int len,
1347 		   void *from, int length, int transhdrlen,
1367 				from, length, transhdrlen, flags);
1403 	/* move skb->data to ip header from ext header */
1462 	 * Steal rt from cork.dst to avoid a pair of atomic_inc/atomic_dec
1537 			    int getfrag(void *from, char *to, int offset,
1539 			    void *from, int length, int transhdrlen,
1560 			       from, length, transhdrlen, flags);
1570  *	Fetch data from kernel space and fill in checksum if needed.