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8a96216847
IPv6 connectivity might start off (e.g. network not fully up when haproxy starts), so for features like resolvers, it would be nice to periodically recheck. With this change, instead of having the resolvers code rely on a variable indicating connectivity, it will now call a function that will check for how long a connectivity check hasn't been run, and will perform a new one if needed. The age was set to 30s which seems reasonable considering that the DNS will cache results anyway. There's no saving in spacing it more since the syscall is very check (just a connect() without any packet being emitted). The variables remain exported so that we could present them in show info or anywhere else. This way, "dns-accept-family auto" will now stay up to date. Warning though, it does perform some caching so even with a refreshed IPv6 connectivity, an older record may be returned anyway.
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* include/haproxy/sock_inet.h
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* This file contains declarations for AF_INET & AF_INET6 sockets.
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*
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* Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_SOCK_INET_H
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#define _HAPROXY_SOCK_INET_H
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <haproxy/api.h>
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extern int sock_inet6_v6only_default;
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extern int sock_inet_tcp_maxseg_default;
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extern int sock_inet6_tcp_maxseg_default;
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extern int sock_inet6_seems_reachable;
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extern uint last_inet6_check;
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#ifdef HA_HAVE_MPTCP
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extern int sock_inet_mptcp_maxseg_default;
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extern int sock_inet6_mptcp_maxseg_default;
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#else
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#define sock_inet_mptcp_maxseg_default -1
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#define sock_inet6_mptcp_maxseg_default -1
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#endif
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extern struct proto_fam proto_fam_inet4;
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extern struct proto_fam proto_fam_inet6;
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/* external types */
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struct receiver;
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int sock_inet4_addrcmp(const struct sockaddr_storage *a, const struct sockaddr_storage *b);
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int sock_inet6_addrcmp(const struct sockaddr_storage *a, const struct sockaddr_storage *b);
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void sock_inet_set_port(struct sockaddr_storage *addr, int port);
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int sock_inet_get_dst(int fd, struct sockaddr *sa, socklen_t salen, int dir);
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int sock_inet_is_foreign(int fd, sa_family_t family);
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int sock_inet4_make_foreign(int fd);
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int sock_inet6_make_foreign(int fd);
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int sock_inet_bind_receiver(struct receiver *rx, char **errmsg);
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int is_inet6_reachable(void);
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#endif /* _HAPROXY_SOCK_INET_H */
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