Date: Thu, 12 Aug 2004 17:03:21 +0400 From: Gleb Smirnoff <glebius@freebsd.org> To: current@freebsd.org Subject: Resolved: if_index in struct ifnet broken in recent CURRENT Message-ID: <20040812130321.GA23885@cell.sick.ru> In-Reply-To: <20040812075928.GA21205@cell.sick.ru> References: <20040812075053.GA21129@cell.sick.ru> <20040812075928.GA21205@cell.sick.ru>
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The problem was that kernel source tree from which I was building
module was newer than running kernel, and struct ifnet size has
changed recently...
On Thu, Aug 12, 2004 at 11:59:28AM +0400, Gleb Smirnoff wrote:
T> Hmm, some more information: actually if_index is broken
T> not only in in mbuf packet headers.
T>
T> This code with different addresses:
T>
T> bzero((caddr_t)&ro, sizeof(ro));
T> sin = (struct sockaddr_in *)&ro.ro_dst;
T> sin->sin_len = sizeof(*sin);
T> sin->sin_family = AF_INET;
T> sin->sin_addr = \\some address\\;
T> rtalloc_ign(&ro, RTF_CLONING);
T> if (ro.ro_rt != NULL) {
T> struct rtentry *rt = ro.ro_rt;
T>
T> printf("rt idx %d, name %s\n",
T> rt->rt_ifp->if_index,
T> rt->rt_ifp->if_xname);
T>
T> produces
T>
T> rt idx 0, name fxp0
T> rt idx 0, name lo0
T>
T> On Thu, Aug 12, 2004 at 11:50:53AM +0400, Gleb Smirnoff wrote:
T> T> I can see this at least in fxp driver: if I capture packets using
T> T> ng_ether(4), and check interface name like this
T> T>
T> T> printf("idx %d, name %s\n",
T> T> (*m)->m_pkthdr.rcvif->if_index,
T> T> (*m)->m_pkthdr.rcvif->if_xname);
T> T> I get on console:
T> T>
T> T> idx 0, name fxp0
T> T>
T> T> Really fxp's index is 1 (AFAIK if_index must be > 0), I have checked this
T> T> using if_nametoindex() from userland.
T>
T> --
T> Totus tuus, Glebius.
T> GLEBIUS-RIPN GLEB-RIPE
T> _______________________________________________
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--
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE
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