Add a SIOCGIFCLONERS ioctl, which fetches a list of network
interface cloners from the kernel.
This commit is contained in:
thorpej
parent
2ebdfcd251
commit
9c881e00cb
44
sys/net/if.c
44
sys/net/if.c
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@ -1,4 +1,4 @@
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/* $NetBSD: if.c,v 1.66 2000/07/19 06:00:39 onoe Exp $ */
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/* $NetBSD: if.c,v 1.67 2000/07/20 18:40:27 thorpej Exp $ */
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/*-
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* Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
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@ -150,8 +150,10 @@ extern void nd6_setmtu __P((struct ifnet *));
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int if_rt_walktree __P((struct radix_node *, void *));
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struct if_clone *if_clone_lookup __P((const char *, int *));
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int if_clone_list __P((struct if_clonereq *));
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LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
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int if_cloners_count;
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/*
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* Network interface utility routines.
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@ -578,6 +580,7 @@ if_clone_attach(ifc)
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{
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LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
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if_cloners_count++;
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}
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/*
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@ -589,6 +592,42 @@ if_clone_detach(ifc)
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{
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LIST_REMOVE(ifc, ifc_list);
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if_cloners_count--;
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}
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/*
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* Provide list of interface cloners to userspace.
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*/
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int
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if_clone_list(ifcr)
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struct if_clonereq *ifcr;
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{
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char outbuf[IFNAMSIZ], *dst;
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struct if_clone *ifc;
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int count, error = 0;
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ifcr->ifcr_total = if_cloners_count;
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if ((dst = ifcr->ifcr_buffer) == NULL) {
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/* Just asking how many there are. */
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return (0);
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}
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if (ifcr->ifcr_count < 0)
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return (EINVAL);
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count = (if_cloners_count < ifcr->ifcr_count) ?
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if_cloners_count : ifcr->ifcr_count;
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for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
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ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
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strncpy(outbuf, ifc->ifc_name, IFNAMSIZ);
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outbuf[IFNAMSIZ - 1] = '\0'; /* sanity */
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error = copyout(outbuf, dst, IFNAMSIZ);
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if (error)
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break;
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}
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return (error);
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}
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/*
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@ -1032,6 +1071,9 @@ ifioctl(so, cmd, data, p)
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return ((cmd == SIOCIFCREATE) ?
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if_clone_create(ifr->ifr_name) :
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if_clone_destroy(ifr->ifr_name));
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case SIOCIFGCLONERS:
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return (if_clone_list((struct if_clonereq *)data));
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}
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ifp = ifunit(ifr->ifr_name);
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25
sys/net/if.h
25
sys/net/if.h
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@ -1,4 +1,4 @@
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/* $NetBSD: if.h,v 1.52 2000/07/04 19:09:17 thorpej Exp $ */
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/* $NetBSD: if.h,v 1.53 2000/07/20 18:40:27 thorpej Exp $ */
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/*-
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* Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
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@ -116,6 +116,13 @@ struct socket;
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struct ether_header;
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struct ifnet;
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/*
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* Length of interface external name, including terminating '\0'.
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* Note: this is the same size as a generic device's external name.
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*/
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#define IFNAMSIZ 16
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#define IF_NAMESIZE IFNAMSIZ
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/*
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* Structure describing a `cloning' interface.
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*/
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@ -131,6 +138,15 @@ struct if_clone {
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#define IF_CLONE_INITIALIZER(name, create, destroy) \
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{ { 0 }, name, sizeof(name) - 1, create, destroy }
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/*
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* Structure used to query names of interface cloners.
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*/
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struct if_clonereq {
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int ifcr_total; /* total cloners (out) */
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int ifcr_count; /* room for this many in user buffer */
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char *ifcr_buffer; /* buffer for cloner names */
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};
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/*
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* Structure defining statistics and other data kept regarding a network
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* interface.
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@ -199,13 +215,6 @@ struct if_data14 {
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*/
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TAILQ_HEAD(ifnet_head, ifnet); /* the actual queue head */
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/*
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* Length of interface external name, including terminating '\0'.
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* Note: this is the same size as a generic device's external name.
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*/
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#define IFNAMSIZ 16
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#define IF_NAMESIZE IFNAMSIZ
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struct ifnet { /* and the entries */
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void *if_softc; /* lower-level data for this if */
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TAILQ_ENTRY(ifnet) if_list; /* all struct ifnets are chained */
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@ -1,4 +1,4 @@
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/* $NetBSD: sockio.h,v 1.12 2000/07/02 00:20:49 thorpej Exp $ */
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/* $NetBSD: sockio.h,v 1.13 2000/07/20 18:40:26 thorpej Exp $ */
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/*-
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* Copyright (c) 1982, 1986, 1990, 1993, 1994
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@ -101,5 +101,6 @@
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parameters */
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#define SIOCIFCREATE _IOW('i', 122, struct ifreq) /* create clone if */
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#define SIOCIFDESTROY _IOW('i', 121, struct ifreq) /* destroy clone if */
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#define SIOCIFGCLONERS _IOWR('i', 120, struct if_clonereq) /* get cloners */
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#endif /* !_SYS_SOCKIO_H_ */
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