1897a4f168
to a non-wildcard address. As documented in ip(4), doing sendmsg(2) with IP_SENDSRCADDR on a socket that is bound to non-wildcard address is completely different to using this control message on a wildcard one. A fix is to add a bool to mark whether we did setsockopt(IP_RECVDSTADDR) on the socket, and use IP_SENDSRCADDR control message only if we did. While here, garbage collect absolutely useless udp_recv() function that establishes some structures on stack to never use them later.
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/*
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* Copyright (c) 2003
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* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
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* All rights reserved.
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*
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* Author: Harti Brandt <harti@freebsd.org>
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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 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 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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* $Begemot: bsnmp/snmpd/trans_udp.h,v 1.3 2004/08/06 08:47:16 brandt Exp $
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*
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* UDP transport
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*/
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struct udp_port {
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struct tport tport; /* must begin with this */
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uint8_t addr[4]; /* host byteorder */
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uint16_t port; /* host byteorder */
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struct port_input input; /* common input stuff */
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struct sockaddr_in ret; /* the return address */
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bool recvdstaddr; /* IP_RECVDSTADDR is on */
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struct in_addr dstaddr; /* address the request was sent to */
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};
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/* argument for open call */
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struct udp_open {
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uint8_t addr[4]; /* host byteorder */
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uint16_t port; /* host byteorder */
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};
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extern const struct transport_def udp_trans;
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