From fadeddfbb2aa38a980dd959b5ec1ffba7afd43cb Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 20:02:34 +0200 Subject: Adding upstream version 1.0.18. Signed-off-by: Daniel Baumann --- src/daemon/forward-linux.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 src/daemon/forward-linux.c (limited to 'src/daemon/forward-linux.c') diff --git a/src/daemon/forward-linux.c b/src/daemon/forward-linux.c new file mode 100644 index 0000000..6308445 --- /dev/null +++ b/src/daemon/forward-linux.c @@ -0,0 +1,59 @@ +/* -*- mode: c; c-file-style: "openbsd" -*- */ +/* + * Copyright (c) 2013 Vincent Bernat + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "lldpd.h" + +#include + +static int +ip_forwarding_enabled(int af) +{ + int fd, rc = -1; + const char *fname; + char status; + + if (af == LLDPD_AF_IPV4) + fname = PROCFS_SYS_NET "ipv4/ip_forward"; + else if (af == LLDPD_AF_IPV6) + fname = PROCFS_SYS_NET "ipv6/conf/all/forwarding"; + else + return -1; + + if ((fd = priv_open(fname)) < 0) return -1; + + if (read(fd, &status, 1) == 1) rc = (status == '1'); + + close(fd); + return rc; +} + +int +interfaces_routing_enabled(struct lldpd *cfg) +{ + (void)cfg; + int rc; + + rc = ip_forwarding_enabled(LLDPD_AF_IPV4); + /* + * Report being a router if IPv4 forwarding is enabled. + * In case of error also stop the execution right away. + * If IPv4 forwarding is disabled we'll check the IPv6 status. + */ + if (rc != 0) return rc; + + return ip_forwarding_enabled(LLDPD_AF_IPV6); +} -- cgit v1.2.3