diff options
Diffstat (limited to 'usr.sbin/mrouted/config.c')
| -rw-r--r-- | usr.sbin/mrouted/config.c | 65 |
1 files changed, 46 insertions, 19 deletions
diff --git a/usr.sbin/mrouted/config.c b/usr.sbin/mrouted/config.c index 1147412..0b5ff7b 100644 --- a/usr.sbin/mrouted/config.c +++ b/usr.sbin/mrouted/config.c @@ -7,12 +7,18 @@ * Leland Stanford Junior University. * * - * $Id: config.c,v 3.8 1995/11/29 22:36:57 fenner Rel $ + * config.c,v 3.8.4.10 1998/01/06 01:57:41 fenner Exp */ #include "defs.h" +#ifndef lint +static char rcsid[] = "@(#) $Id: \ +config.c,v 3.8.4.10 1998/01/06 01:57:41 fenner Exp $"; +#endif + +struct ifconf ifc; /* * Query the kernel to find network interfaces that are multicast-capable @@ -21,28 +27,48 @@ void config_vifs_from_kernel() { - struct ifreq ifbuf[32]; struct ifreq *ifrp, *ifend; - struct ifconf ifc; register struct uvif *v; register vifi_t vifi; int n; u_int32 addr, mask, subnet; short flags; + int num_ifreq = 32; + + ifc.ifc_len = num_ifreq * sizeof(struct ifreq); + ifc.ifc_buf = malloc(ifc.ifc_len); + while (ifc.ifc_buf) { + if (ioctl(udp_socket, SIOCGIFCONF, (char *)&ifc) < 0) + log(LOG_ERR, errno, "ioctl SIOCGIFCONF"); + + /* + * If the buffer was large enough to hold all the addresses + * then break out, otherwise increase the buffer size and + * try again. + * + * The only way to know that we definitely had enough space + * is to know that there was enough space for at least one + * more struct ifreq. ??? + */ + if ((num_ifreq * sizeof(struct ifreq)) >= + ifc.ifc_len + sizeof(struct ifreq)) + break; - ifc.ifc_buf = (char *)ifbuf; - ifc.ifc_len = sizeof(ifbuf); - if (ioctl(udp_socket, SIOCGIFCONF, (char *)&ifc) < 0) - log(LOG_ERR, errno, "ioctl SIOCGIFCONF"); + num_ifreq *= 2; + ifc.ifc_len = num_ifreq * sizeof(struct ifreq); + ifc.ifc_buf = realloc(ifc.ifc_buf, ifc.ifc_len); + } + if (ifc.ifc_buf == NULL) + log(LOG_ERR, 0, "config_vifs_from_kernel: ran out of memory"); - ifrp = (struct ifreq *)ifbuf; - ifend = (struct ifreq *)((char *)ifbuf + ifc.ifc_len); + ifrp = (struct ifreq *)ifc.ifc_buf; + ifend = (struct ifreq *)(ifc.ifc_buf + ifc.ifc_len); /* * Loop through all of the interfaces. */ for (; ifrp < ifend; ifrp = (struct ifreq *)((char *)ifrp + n)) { struct ifreq ifr; -#if BSD >= 199006 +#ifdef HAVE_SA_LEN n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name); if (n < sizeof(*ifrp)) n = sizeof(*ifrp); @@ -97,6 +123,12 @@ config_vifs_from_kernel() * one already installed in the uvifs array. */ for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) { + if (strcmp(v->uv_name, ifr.ifr_name) == 0) { + log(LOG_DEBUG, 0, "skipping %s (%s on subnet %s) (alias for vif#%u?)", + v->uv_name, inet_fmt(addr, s1), + inet_fmts(subnet, mask, s2), vifi); + break; + } if ((addr & v->uv_subnetmask) == v->uv_subnet || (v->uv_subnet & mask) == subnet) { log(LOG_WARNING, 0, "ignoring %s, same subnet as %s", @@ -114,20 +146,15 @@ config_vifs_from_kernel() continue; } v = &uvifs[numvifs]; - v->uv_flags = 0; - v->uv_metric = DEFAULT_METRIC; - v->uv_rate_limit = DEFAULT_PHY_RATE_LIMIT; - v->uv_threshold = DEFAULT_THRESHOLD; + zero_vif(v, 0); v->uv_lcl_addr = addr; - v->uv_rmt_addr = 0; v->uv_subnet = subnet; v->uv_subnetmask = mask; v->uv_subnetbcast = subnet | ~mask; strncpy(v->uv_name, ifr.ifr_name, IFNAMSIZ); - v->uv_groups = NULL; - v->uv_neighbors = NULL; - v->uv_acl = NULL; - v->uv_addrs = NULL; + + if (flags & IFF_POINTOPOINT) + v->uv_flags |= VIFF_REXMIT_PRUNES; log(LOG_INFO,0,"installing %s (%s on subnet %s) as vif #%u - rate=%d", v->uv_name, inet_fmt(addr, s1), inet_fmts(subnet, mask, s2), |
