bsd/netinet/tcp_output.c

77 #include <sys/mbuf.h>
130 extern struct mbuf *m_copypack();
218 static int tcp_ip_output(struct socket *, struct tcpcb *, struct mbuf *, int,
219     struct mbuf *, int, int, int32_t, boolean_t);
222 static struct mbuf* tcp_send_lroacks(struct tcpcb *tp, struct mbuf *m, struct tcphdr *th);
271 	register struct mbuf *m;
291 	struct mbuf *m_lastm = NULL;
292 	struct mbuf *m_head = NULL;
293 	struct mbuf *packetlist = NULL;
294 	struct mbuf *tp_inp_options = tp->t_inpcb->inp_depend4.inp4_options;
304 	struct mbuf *mnext = NULL;
1004 	 * always fit in a single mbuf, leaving room for a maximum
1302 	 * Grab a header mbuf, attaching a copy of data to
1329 		 * the necessary mbuf hdrs under 1 mbuf lock and
1330 		 * avoids rescanning the socket mbuf list if
1334 		 * of a single mbuf header's data area (no cluster attached)
1336 		 * the protocol headers fits into a single mbuf header's
1389 				 * determine whether the mbuf pointer and offset passed back by the 'last' call
1393 				 * we're re-transmitting a packet sent earlier), than we can't pass the mbuf pointer and
1395 				 * m_copym_with_hdrs to avoid rescanning from the beginning of the socket buffer mbuf list.
1396 				 * setting the mbuf pointer to NULL is sufficient to disable the hint mechanism.
1410 				 * m_copym_with_hdrs will always return the last mbuf pointer and the offset into it that
1801 		DTRACE_TCP5(send, struct mbuf *, m, struct inpcb *, tp->t_inpcb,
1807 		DTRACE_TCP5(send, struct mbuf *, m, struct inpcb *, tp->t_inpcb,
1830 				struct mbuf *tail, *next;
1981 tcp_ip_output(struct socket *so, struct tcpcb *tp, struct mbuf *pkt,
1982     int cnt, struct mbuf *opt, int flags, int sack_in_progress, int recwin,
2092 		struct mbuf *npkt = pkt->m_nextpkt;
2100 			 * single mbuf might result in multiple mbufs as part
2237 static struct mbuf*
2238 tcp_send_lroacks(struct tcpcb *tp, struct mbuf *m, struct tcphdr *th)
2240 	struct mbuf *mnext = NULL, *ack_chain = NULL, *tail = NULL;
2248 	struct mbuf *prev_ack_pkt = NULL;
2301 				printf("%s: failed to alloc mbuf.\n", __func__);