Function sbappendstream_locked

freebsd/kern/uipc_sockbuf.c:956–991

* This version of sbappend() should only be used when the caller absolutely * knows that there will never be more than one record in the socket buffer, * that is, a stream protocol (such as TCP). */

 * that is, a stream protocol (such as TCP).
 */
void
sbappendstream_locked(struct sockbuf *sb, struct mbuf *m, int flags)
{
	SOCKBUF_LOCK_ASSERT(sb);

	KASSERT(m->m_nextpkt == NULL,("sbappendstream 0"));

#ifdef KERN_TLS
	/*
	 * Decrypted TLS records are appended as records via
	 * sbappendrecord().  TCP passes encrypted TLS records to this
	 * function which must be scheduled for decryption.
	 */
	if (sb->sb_flags & SB_TLS_RX) {
		sbappend_ktls_rx(sb, m);
		return;
	}
#endif

	KASSERT(sb->sb_mb == sb->sb_lastrecord,("sbappendstream 1"));

	SBLASTMBUFCHK(sb);

#ifdef KERN_TLS
	if (sb->sb_tls_info != NULL)
		ktls_seq(sb, m);
#endif

	/* Remove all packet headers and mbuf tags to get a pure data chain. */
	m_demote(m, 1, flags & PRUS_NOTREADY ? M_NOTREADY : 0);

	sbcompress(sb, m, sb->sb_mbtail);

	sb->sb_lastrecord = sb->sb_mb;
	SBLASTRECORDCHK(sb);
}

/*
 * This version of sbappend() should only be used when the caller absolutely