682 lines
18 KiB
C
682 lines
18 KiB
C
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/*
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* Copyright (c) 1998 by the University of Southern California.
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation in source and binary forms for lawful
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* purposes and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that both
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* the copyright notice and this permission notice appear in supporting
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* documentation, and that any documentation, advertising materials,
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* and other materials related to such distribution and use acknowledge
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* that the software was developed by the University of Southern
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* California and/or Information Sciences Institute.
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* The name of the University of Southern California may not
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* be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THE UNIVERSITY OF SOUTHERN CALIFORNIA DOES NOT MAKE ANY REPRESENTATIONS
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* ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. THIS SOFTWARE IS
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* PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND
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* NON-INFRINGEMENT.
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*
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* IN NO EVENT SHALL USC, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,
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* TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH,
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* THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Other copyrights might apply to parts of this software and are so
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* noted when applicable.
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*/
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/*
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* Questions concerning this software should be directed to
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* Pavlin Ivanov Radoslavov (pavlin@catarina.usc.edu)
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*
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* $Id: config.c,v 1.3 1999/12/30 09:23:08 itojun Exp $
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*/
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/*
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* Part of this program has been derived from mrouted.
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE.mrouted".
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*
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* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
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* Leland Stanford Junior University.
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*
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* $FreeBSD$
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*/
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#include "defs.h"
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/*
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* Forward declarations.
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*/
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static char *next_word __P((char **));
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static int parse_phyint __P((char *s));
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static void add_phaddr __P((struct uvif *v, struct sockaddr_in6 *addr,
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struct in6_addr *mask));
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static mifi_t ifname2mifi __P((char *ifname));
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static int wordToOption __P((char *));
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static int parse_filter __P((char *s));
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#if 0 /* not used */
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static int parse_default_source_metric __P((char *));
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static int parse_default_source_preference __P((char *));
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#endif
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/*
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* Query the kernel to find network interfaces that are multicast-capable
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* and install them in the uvifs array.
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*/
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void
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config_vifs_from_kernel()
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{
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struct ifreq *ifrp, *ifend;
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register struct uvif *v;
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register vifi_t vifi;
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int n;
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struct sockaddr_in6 addr;
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struct in6_addr mask, prefix;
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short flags;
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int num_ifreq = 64;
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struct ifconf ifc;
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total_interfaces = 0; /* The total number of physical interfaces */
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ifc.ifc_len = num_ifreq * sizeof(struct ifreq);
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ifc.ifc_buf = calloc(ifc.ifc_len, sizeof(char));
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while (ifc.ifc_buf) {
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caddr_t newbuf;
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if (ioctl(udp_socket, SIOCGIFCONF, (char *)&ifc) < 0)
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log(LOG_ERR, errno, "ioctl SIOCGIFCONF");
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/*
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* If the buffer was large enough to hold all the addresses
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* then break out, otherwise increase the buffer size and
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* try again.
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*
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* The only way to know that we definitely had enough space
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* is to know that there was enough space for at least one
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* more struct ifreq. ???
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*/
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if ((num_ifreq * sizeof(struct ifreq)) >=
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ifc.ifc_len + sizeof(struct ifreq))
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break;
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num_ifreq *= 2;
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ifc.ifc_len = num_ifreq * sizeof(struct ifreq);
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newbuf = realloc(ifc.ifc_buf, ifc.ifc_len);
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if (newbuf == NULL)
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free(ifc.ifc_buf);
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ifc.ifc_buf = newbuf;
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}
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if (ifc.ifc_buf == NULL)
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log(LOG_ERR, 0, "config_vifs_from_kernel: ran out of memory");
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ifrp = (struct ifreq *)ifc.ifc_buf;
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ifend = (struct ifreq *)(ifc.ifc_buf + ifc.ifc_len);
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/*
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* Loop through all of the interfaces.
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*/
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for (; ifrp < ifend; ifrp = (struct ifreq *)((char *)ifrp + n)) {
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struct ifreq ifr;
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struct in6_ifreq ifr6;
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#ifdef HAVE_SA_LEN
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n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
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if (n < sizeof(*ifrp))
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n = sizeof(*ifrp);
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#else
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n = sizeof(*ifrp);
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#endif /* HAVE_SA_LEN */
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/*
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* Ignore any interface for an address family other than IPv6.
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*/
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if (ifrp->ifr_addr.sa_family != AF_INET6) {
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total_interfaces++; /* Eventually may have IPv6 address later */
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continue;
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}
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memcpy(&addr, &ifrp->ifr_addr, sizeof(struct sockaddr_in6));
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/*
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* Need a template to preserve address info that is
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* used below to locate the next entry. (Otherwise,
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* SIOCGIFFLAGS stomps over it because the requests
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* are returned in a union.)
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*/
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memcpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifr.ifr_name));
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memcpy(ifr6.ifr_name, ifrp->ifr_name, sizeof(ifr6.ifr_name));
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/*
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* Ignore loopback interfaces and interfaces that do not
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* support multicast.
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*/
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if (ioctl(udp_socket, SIOCGIFFLAGS, (char *)&ifr) < 0)
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log(LOG_ERR, errno, "ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
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flags = ifr.ifr_flags;
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if ((flags & (IFF_LOOPBACK | IFF_MULTICAST)) != IFF_MULTICAST)
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continue;
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/*
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* Get netmask of the address.
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*/
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ifr6.ifr_addr = *(struct sockaddr_in6 *)&ifrp->ifr_addr;
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if (ioctl(udp_socket, SIOCGIFNETMASK_IN6, (char *)&ifr6) < 0)
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log(LOG_ERR, errno, "ioctl SIOCGIFNETMASK_IN6 for %s",
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ifr6.ifr_name);
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memcpy(&mask, &ifr6.ifr_addr.sin6_addr, sizeof(mask));
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if (IN6_IS_ADDR_LINKLOCAL(&addr.sin6_addr)) {
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addr.sin6_scope_id = if_nametoindex(ifrp->ifr_name);
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#ifdef __KAME__
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/*
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* Hack for KAME kernel. Set sin6_scope_id field of a
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* link local address and clear the index embedded in
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* the address.
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*/
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/* clear interface index */
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addr.sin6_addr.s6_addr[2] = 0;
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addr.sin6_addr.s6_addr[3] = 0;
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#endif
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}
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/*
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* If the address is connected to the same subnet as one already
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* installed in the uvifs array, just add the address to the list
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* of addresses of the uvif.
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*/
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for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
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if (strcmp(v->uv_name, ifr.ifr_name) == 0) {
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add_phaddr(v, &addr, &mask);
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break;
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}
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}
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if (vifi != numvifs)
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continue;
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/*
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* If there is room in the uvifs array, install this interface.
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*/
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if (numvifs == MAXMIFS) {
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log(LOG_WARNING, 0, "too many ifs, ignoring %s", ifr.ifr_name);
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continue;
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}
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/*
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* Everyone below is a potential vif interface.
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* We don't care if it has wrong configuration or not configured
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* at all.
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*/
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total_interfaces++;
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v = &uvifs[numvifs];
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v->uv_flags = 0;
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v->uv_metric = DEFAULT_METRIC;
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v->uv_admetric = 0;
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#if 0
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v->uv_threshold = DEFAULT_THRESHOLD;
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#endif
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v->uv_rate_limit = DEFAULT_PHY_RATE_LIMIT;
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#if 0
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v->uv_rmt_addr = INADDR_ANY_N;
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#endif
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v->uv_dst_addr = allpim6routers_group;
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v->uv_prefix.sin6_addr = prefix;
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v->uv_subnetmask = mask;
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strncpy(v->uv_name, ifr.ifr_name, IFNAMSIZ);
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v->uv_ifindex = if_nametoindex(v->uv_name);
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v->uv_groups = (struct listaddr *)NULL;
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v->uv_dvmrp_neighbors = (struct listaddr *)NULL;
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NBRM_CLRALL(v->uv_nbrmap);
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v->uv_querier = (struct listaddr *)NULL;
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v->uv_prune_lifetime = 0;
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v->uv_acl = (struct vif_acl *)NULL;
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v->uv_leaf_timer = 0;
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v->uv_addrs = (struct phaddr *)NULL;
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v->uv_filter = (struct vif_filter *)NULL;
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v->uv_pim_hello_timer = 0;
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v->uv_gq_timer = 0;
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v->uv_pim_neighbors = (struct pim_nbr_entry *)NULL;
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v->uv_local_pref = default_source_preference;
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v->uv_local_metric = default_source_metric;
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add_phaddr(v, &addr, &mask);
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if (flags & IFF_POINTOPOINT)
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v->uv_flags |= (VIFF_REXMIT_PRUNES | VIFF_POINT_TO_POINT);
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log(LOG_INFO, 0,
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"installing %s as if #%u - rate=%d",
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v->uv_name, numvifs, v->uv_rate_limit);
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++numvifs;
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/*
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* If the interface is not yet up, set the vifs_down flag to
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* remind us to check again later.
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*/
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if (!(flags & IFF_UP)) {
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v->uv_flags |= VIFF_DOWN;
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vifs_down = TRUE;
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}
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}
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}
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static void
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add_phaddr(v, addr, mask)
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struct uvif *v;
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struct sockaddr_in6 *addr;
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struct in6_addr *mask;
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{
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struct phaddr *pa;
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int i;
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if ((pa = malloc(sizeof(*pa))) == NULL)
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log(LOG_ERR, 0, "add_phaddr: memory exhausted");
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memset(pa, 0, sizeof(*pa));
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pa->pa_addr = *addr;
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pa->pa_subnetmask = *mask;
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/*
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* install the prefix of the address derived from the address
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* and the mask.
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*/
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for (i = 0; i < sizeof(struct in6_addr); i++)
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pa->pa_prefix.sin6_addr.s6_addr[i] =
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addr->sin6_addr.s6_addr[i] & mask->s6_addr[i];
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pa->pa_prefix.sin6_scope_id = addr->sin6_scope_id;
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if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) {
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if (v->uv_linklocal) {
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log(LOG_WARNING, 0,
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"add_phaddr: found more than one link-local "
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"address on %s",
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v->uv_name);
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}
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v->uv_linklocal = pa; /* relace anyway */
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}
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/* link into chain */
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pa->pa_next = v->uv_addrs;
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v->uv_addrs = pa;
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}
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static mifi_t
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ifname2mifi(ifname)
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char *ifname;
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{
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mifi_t mifi;
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struct uvif *v;
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for (mifi = 0, v = uvifs; mifi < numvifs; ++mifi, ++v) {
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if (strcmp(v->uv_name, ifname) == 0)
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break;
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}
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return(mifi);
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}
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#define UNKNOWN -1
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#define EMPTY 1
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#define PHYINT 2
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#define DEFAULT_SOURCE_METRIC 3
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#define DEFAULT_SOURCE_PREFERENCE 4
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#define FILTER 5
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/*
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* function name: wordToOption
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* input: char *word, a pointer to the word
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* output: int; a number corresponding to the code of the word
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* operation: converts the result of the string comparisons into numerics.
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* comments: called by config_vifs_from_file()
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*/
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static int
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wordToOption(word)
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char *word;
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{
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if (EQUAL(word, ""))
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return EMPTY;
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if (EQUAL(word, "phyint"))
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return PHYINT;
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if (EQUAL(word, "default_source_metric"))
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return DEFAULT_SOURCE_METRIC;
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if (EQUAL(word, "default_source_preference"))
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return DEFAULT_SOURCE_PREFERENCE;
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if (EQUAL(word, "filter"))
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return FILTER;
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return UNKNOWN;
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}
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/*
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* function name: parse_phyint
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* input: char *s, pointing to the parsing point of the file
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* output: int (TRUE if the parsing was successful, o.w. FALSE)
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* operation: parses the physical interface file configurations, if any.
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* The general form is:
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* phyint <ifname> [disable]
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*/
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static int
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parse_phyint(s)
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char *s;
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{
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|
|
char *w, c, *ifname;
|
||
|
|
vifi_t vifi;
|
||
|
|
struct uvif *v;
|
||
|
|
u_int n;
|
||
|
|
|
||
|
|
if (EQUAL((w = next_word(&s)), "")) {
|
||
|
|
log(LOG_WARNING, 0, "Missing phyint in %s", configfilename);
|
||
|
|
return(FALSE);
|
||
|
|
} /* if empty */
|
||
|
|
ifname = w;
|
||
|
|
|
||
|
|
for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
|
||
|
|
if (vifi == numvifs) {
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"phyint %s in %s is not a configured interface",
|
||
|
|
ifname, configfilename);
|
||
|
|
return(FALSE);
|
||
|
|
} /* if vifi == numvifs */
|
||
|
|
|
||
|
|
if (strcmp(v->uv_name, ifname))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
while (!EQUAL((w = next_word(&s)), "")) {
|
||
|
|
if (EQUAL(w, "disable"))
|
||
|
|
v->uv_flags |= VIFF_DISABLED;
|
||
|
|
else if (EQUAL(w, "nolistener"))
|
||
|
|
v->uv_flags |= VIFF_NOLISTENER;
|
||
|
|
else if(EQUAL(w, "preference")) {
|
||
|
|
if(EQUAL((w = next_word(&s)), ""))
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Missing preference for phyint %s in %s",
|
||
|
|
ifname, configfilename);
|
||
|
|
else if (sscanf(w, "%u%c", &n, &c) != 1 ||
|
||
|
|
n < 1 || n > 255 )
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Invalid preference '%s' for phyint %s in %s",
|
||
|
|
w, ifname,
|
||
|
|
configfilename);
|
||
|
|
else {
|
||
|
|
IF_DEBUG(DEBUG_ASSERT)
|
||
|
|
log(LOG_DEBUG, 0,
|
||
|
|
"Config setting default local preference on %s to %d.",
|
||
|
|
ifname, n);
|
||
|
|
v->uv_local_pref = n;
|
||
|
|
}
|
||
|
|
|
||
|
|
} else if(EQUAL(w, "metric")) {
|
||
|
|
if(EQUAL((w = next_word(&s)), ""))
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Missing metric for phyint %s in %s",
|
||
|
|
ifname, configfilename);
|
||
|
|
else if (sscanf(w, "%u%c", &n, &c) != 1 ||
|
||
|
|
n < 1 || n > 1024 )
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Invalid metric '%s' for phyint %s in %s",
|
||
|
|
w, ifname,
|
||
|
|
configfilename);
|
||
|
|
else {
|
||
|
|
IF_DEBUG(DEBUG_ASSERT)
|
||
|
|
log(LOG_DEBUG, 0,
|
||
|
|
"Config setting default local metric on %s to %d.",
|
||
|
|
ifname, n);
|
||
|
|
v->uv_local_metric = n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} /* if not empty */
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
parse_filter(s)
|
||
|
|
char *s;
|
||
|
|
{
|
||
|
|
char *w, *groups, *p;
|
||
|
|
mifi_t mifi;
|
||
|
|
struct in6_addr grp1, grp2;
|
||
|
|
if_set filterset;
|
||
|
|
struct mrtfilter *filter;
|
||
|
|
int plen = 0, filtertype;
|
||
|
|
|
||
|
|
if (EQUAL((groups = next_word(&s)), "")) {
|
||
|
|
log(LOG_WARNING, 0, "Missing multicast group in %s",
|
||
|
|
configfilename);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Group address specification. Valid format are the followings.
|
||
|
|
* - Group1-Group2: specifies a numerical range of a scope.
|
||
|
|
* - GroupPrefix/Prefixlen: specifies a prefix of a scope. If the
|
||
|
|
* Prefixlen is omitted, it means the exact match.
|
||
|
|
*/
|
||
|
|
if ((p = strchr(groups, '-')) != NULL) { /* Group1-Group2 */
|
||
|
|
char *maddr1, *maddr2;
|
||
|
|
|
||
|
|
maddr1 = groups;
|
||
|
|
maddr2 = p + 1;
|
||
|
|
*p = '\0';
|
||
|
|
if (inet_pton(AF_INET6, maddr1, (void *)&grp1) != 1 ||
|
||
|
|
!IN6_IS_ADDR_MULTICAST(&grp1)) {
|
||
|
|
log(LOG_WARNING, 0, "invalid group address %s", maddr1);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
if (inet_pton(AF_INET6, maddr2, (void *)&grp2) != 1 ||
|
||
|
|
!IN6_IS_ADDR_MULTICAST(&grp2)) {
|
||
|
|
log(LOG_WARNING, 0, "invalid group address %s", maddr2);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
filtertype = FILTER_RANGE;
|
||
|
|
}
|
||
|
|
else if ((p = strchr(groups, '/')) != NULL) { /* GroupPrefix/Plen */
|
||
|
|
char *mprefix = groups;
|
||
|
|
int plen = atoi(p + 1);
|
||
|
|
*p = '\0';
|
||
|
|
if (inet_pton(AF_INET6, mprefix, (void *)&grp1) != 1 ||
|
||
|
|
!IN6_IS_ADDR_MULTICAST(&grp1)) {
|
||
|
|
log(LOG_WARNING, 0, "invalid group prefix %s", mprefix);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
if (plen < 0 || plen > 128) {
|
||
|
|
log(LOG_WARNING, 0, "invalid prefix length %s", p + 1);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
filtertype = FILTER_PREFIX;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (inet_pton(AF_INET6, groups, (void *)&grp1) != 1) {
|
||
|
|
log(LOG_WARNING, 0, "invalid group address %s", groups);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
plen = 128; /* exact match */
|
||
|
|
filtertype = FILTER_PREFIX;
|
||
|
|
}
|
||
|
|
|
||
|
|
IF_ZERO(&filterset);
|
||
|
|
while (!EQUAL((w = next_word(&s)), "")) {
|
||
|
|
if ((mifi = ifname2mifi(w)) == MAXMIFS) {
|
||
|
|
/* XXX: scope consideration?? */
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"phyint %s in %s is not a configured interface",
|
||
|
|
w, configfilename);
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
IF_SET(mifi, &filterset);
|
||
|
|
}
|
||
|
|
if (IF_ISEMPTY(&filterset)) {
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"filter set is empty. ignore it.");
|
||
|
|
return(FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
filter = add_filter(filtertype, &grp1, &grp2, plen);
|
||
|
|
IF_COPY(&filterset, &filter->ifset);
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
#if 0 /* not used */
|
||
|
|
/*
|
||
|
|
* function name: parse_default_source_metric
|
||
|
|
* input: char *s
|
||
|
|
* output: int
|
||
|
|
* operation: reads and assigns the default source metric, if no reliable
|
||
|
|
* unicast routing information available.
|
||
|
|
* General form:
|
||
|
|
* 'default_source_metric <number>'.
|
||
|
|
* default pref and metric statements should precede all phyint
|
||
|
|
* statements in the config file.
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
parse_default_source_metric(s)
|
||
|
|
char *s;
|
||
|
|
{
|
||
|
|
char *w;
|
||
|
|
u_int value;
|
||
|
|
vifi_t vifi;
|
||
|
|
struct uvif *v;
|
||
|
|
|
||
|
|
value = DEFAULT_LOCAL_METRIC;
|
||
|
|
if (EQUAL((w = next_word(&s)), "")) {
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Missing default source metric; set to default %u",
|
||
|
|
DEFAULT_LOCAL_METRIC);
|
||
|
|
} else if (sscanf(w, "%u", &value) != 1) {
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Invalid default source metric; set to default %u",
|
||
|
|
DEFAULT_LOCAL_METRIC);
|
||
|
|
value = DEFAULT_LOCAL_METRIC;
|
||
|
|
}
|
||
|
|
default_source_metric = value;
|
||
|
|
log(LOG_INFO, 0, "default_source_metric is %u", value);
|
||
|
|
|
||
|
|
for (vifi = 0, v = uvifs; vifi < MAXMIFS; ++vifi, ++v) {
|
||
|
|
v->uv_local_metric = default_source_metric;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* function name: parse_default_source_preference
|
||
|
|
* input: char *s
|
||
|
|
* output: int
|
||
|
|
* operation: reads and assigns the default source preference, if no reliable
|
||
|
|
* unicast routing information available.
|
||
|
|
* General form:
|
||
|
|
* 'default_source_preference <number>'.
|
||
|
|
* default pref and metric statements should precede all phyint
|
||
|
|
* statements in the config file.
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
parse_default_source_preference(s)
|
||
|
|
char *s;
|
||
|
|
{
|
||
|
|
char *w;
|
||
|
|
u_int value;
|
||
|
|
vifi_t vifi;
|
||
|
|
struct uvif *v;
|
||
|
|
|
||
|
|
value = DEFAULT_LOCAL_PREF;
|
||
|
|
if (EQUAL((w = next_word(&s)), "")) {
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Missing default source preference; set to default %u",
|
||
|
|
DEFAULT_LOCAL_PREF);
|
||
|
|
} else if (sscanf(w, "%u", &value) != 1) {
|
||
|
|
log(LOG_WARNING, 0,
|
||
|
|
"Invalid default source preference; set to default %u",
|
||
|
|
DEFAULT_LOCAL_PREF);
|
||
|
|
value = DEFAULT_LOCAL_PREF;
|
||
|
|
}
|
||
|
|
default_source_preference = value;
|
||
|
|
log(LOG_INFO, 0, "default_source_preference is %u", value);
|
||
|
|
|
||
|
|
for (vifi = 0, v = uvifs; vifi < MAXMIFS; ++vifi, ++v) {
|
||
|
|
v->uv_local_pref = default_source_preference;
|
||
|
|
}
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void
|
||
|
|
config_vifs_from_file()
|
||
|
|
{
|
||
|
|
FILE *f;
|
||
|
|
char linebuf[100];
|
||
|
|
char *w, *s;
|
||
|
|
struct ifconf ifc;
|
||
|
|
int option;
|
||
|
|
char ifbuf[BUFSIZ];
|
||
|
|
|
||
|
|
if ((f = fopen(configfilename, "r")) == NULL) {
|
||
|
|
if (errno != ENOENT) log(LOG_WARNING, errno, "can't open %s",
|
||
|
|
configfilename);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
ifc.ifc_buf = ifbuf;
|
||
|
|
ifc.ifc_len = sizeof(ifbuf);
|
||
|
|
if (ioctl(udp_socket, SIOCGIFCONF, (char *)&ifc) < 0)
|
||
|
|
log(LOG_ERR, errno, "ioctl SIOCGIFCONF");
|
||
|
|
|
||
|
|
while (fgets(linebuf, sizeof(linebuf), f) != NULL) {
|
||
|
|
s = linebuf;
|
||
|
|
w = next_word(&s);
|
||
|
|
option = wordToOption(w);
|
||
|
|
switch(option) {
|
||
|
|
case EMPTY:
|
||
|
|
continue;
|
||
|
|
break;
|
||
|
|
case PHYINT:
|
||
|
|
parse_phyint(s);
|
||
|
|
break;
|
||
|
|
case FILTER:
|
||
|
|
parse_filter(s);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
log(LOG_WARNING, 0, "unknown command '%s' in %s",
|
||
|
|
w, configfilename);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
fclose(f);
|
||
|
|
}
|
||
|
|
|
||
|
|
static char *
|
||
|
|
next_word(s)
|
||
|
|
char **s;
|
||
|
|
{
|
||
|
|
char *w;
|
||
|
|
|
||
|
|
w = *s;
|
||
|
|
while (*w == ' ' || *w == '\t')
|
||
|
|
w++;
|
||
|
|
|
||
|
|
*s = w;
|
||
|
|
for(;;) {
|
||
|
|
switch (**s) {
|
||
|
|
case ' ' :
|
||
|
|
case '\t' :
|
||
|
|
**s = '\0';
|
||
|
|
(*s)++;
|
||
|
|
return(w);
|
||
|
|
case '\n' :
|
||
|
|
case '#' :
|
||
|
|
**s = '\0';
|
||
|
|
return(w);
|
||
|
|
case '\0' :
|
||
|
|
return(w);
|
||
|
|
default :
|
||
|
|
if (isascii(**s) && isupper(**s))
|
||
|
|
**s = tolower(**s);
|
||
|
|
(*s)++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|