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24b9bb5614
debugging TCP connections. This commit provides a mechanism to free those mbufs when the system is under memory pressure. Because this will result in lost debugging information, the behavior is controllable by a sysctl. The default setting is to free the mbufs. Reviewed by: gnn Approved by: re (gjb) Differential Revision: https://reviews.freebsd.org/D6931 Input from: novice_techie.com
42 lines
1.8 KiB
C
42 lines
1.8 KiB
C
/*-
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* Copyright (c) 2015
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* Jonathan Looney. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET_TCP_PCAP_H_
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#define _NETINET_TCP_PCAP_H_
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void tcp_pcap_init(void);
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void tcp_pcap_add(struct tcphdr *th, struct mbuf *m, struct mbufq *queue);
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void tcp_pcap_drain(struct mbufq *queue);
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void tcp_pcap_tcpcb_init(struct tcpcb *tp);
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void tcp_pcap_set_sock_max(struct mbufq *queue, int newval);
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int tcp_pcap_get_sock_max(struct mbufq *queue);
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extern int tcp_pcap_aggressive_free;
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#endif /* _NETINET_TCP_PCAP_H_ */
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