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117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
/* $NetBSD: uipc_syscalls_40.c,v 1.8 2014/11/26 09:53:53 ozaki-r Exp $ */
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/* written by Pavel Cahyna, 2006. Public domain. */
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls_40.c,v 1.8 2014/11/26 09:53:53 ozaki-r Exp $");
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/*
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* System call interface to the socket abstraction.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/msg.h>
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#include <sys/sysctl.h>
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#include <sys/syscallargs.h>
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#include <sys/errno.h>
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#include <net/if.h>
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#include <compat/sys/socket.h>
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#include <compat/sys/sockio.h>
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#ifdef COMPAT_OIFREQ
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/*
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* Return interface configuration
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* of system. List may be used
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* in later ioctl's (above) to get
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* other information.
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*/
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/*ARGSUSED*/
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int
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compat_ifconf(u_long cmd, void *data)
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{
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struct oifconf *ifc = data;
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struct ifnet *ifp;
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struct ifaddr *ifa;
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struct oifreq ifr, *ifrp = NULL;
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int space = 0, error = 0;
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const int sz = (int)sizeof(ifr);
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const bool docopy = ifc->ifc_req != NULL;
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if (docopy) {
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space = ifc->ifc_len;
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ifrp = ifc->ifc_req;
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}
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IFNET_FOREACH(ifp) {
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(void)strncpy(ifr.ifr_name, ifp->if_xname,
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sizeof(ifr.ifr_name));
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if (ifr.ifr_name[sizeof(ifr.ifr_name) - 1] != '\0')
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return ENAMETOOLONG;
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if (IFADDR_EMPTY(ifp)) {
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memset(&ifr.ifr_addr, 0, sizeof(ifr.ifr_addr));
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if (space >= sz) {
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error = copyout(&ifr, ifrp, sz);
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if (error != 0)
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return (error);
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ifrp++;
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}
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space -= sizeof(ifr);
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continue;
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}
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IFADDR_FOREACH(ifa, ifp) {
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struct sockaddr *sa = ifa->ifa_addr;
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#ifdef COMPAT_OSOCK
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if (cmd == OOSIOCGIFCONF) {
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struct osockaddr *osa =
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(struct osockaddr *)&ifr.ifr_addr;
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/*
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* If it does not fit, we don't bother with it
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*/
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if (sa->sa_len > sizeof(*osa))
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continue;
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memcpy(&ifr.ifr_addr, sa, sa->sa_len);
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osa->sa_family = sa->sa_family;
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if (space >= sz) {
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error = copyout(&ifr, ifrp, sz);
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ifrp++;
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}
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} else
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#endif
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if (sa->sa_len <= sizeof(*sa)) {
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memcpy(&ifr.ifr_addr, sa, sa->sa_len);
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if (space >= sz) {
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error = copyout(&ifr, ifrp, sz);
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ifrp++;
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}
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} else {
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space -= sa->sa_len - sizeof(*sa);
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if (space >= sz) {
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error = copyout(&ifr, ifrp,
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sizeof(ifr.ifr_name));
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if (error == 0) {
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error = copyout(sa,
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&ifrp->ifr_addr,
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sa->sa_len);
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}
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ifrp = (struct oifreq *)
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(sa->sa_len +
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(char *)&ifrp->ifr_addr);
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}
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}
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if (error != 0)
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return (error);
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space -= sz;
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}
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}
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if (docopy)
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ifc->ifc_len -= space;
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else
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ifc->ifc_len = -space;
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return (0);
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}
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#endif
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