imported KAME-DHCPv6 snapshot at 20051201KAME_20051201

1 files changed, 156 insertions, 0 deletions

diff --git a/if.c b/if.c
new file mode 100644
index 0000000..cc7c656
--- /dev/null
+++ b/if.c
@@ -0,0 +1,156 @@
+/*	$KAME: if.c,v 1.6 2005/09/16 11:30:15 suz Exp $	*/
+
+/*
+ * Copyright (C) 2002 WIDE Project.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/queue.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#ifdef __KAME__
+#include <net/if_dl.h>
+#endif
+
+#include <syslog.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ifaddrs.h>
+#include <errno.h>
+
+#include <dhcp6.h>
+#include <config.h>
+#include <common.h>
+
+extern int errno;
+
+struct dhcp6_if *dhcp6_if;
+
+struct dhcp6_if *
+ifinit(ifname)
+	char *ifname;
+{
+	struct dhcp6_if *ifp;
+
+	if ((ifp = find_ifconfbyname(ifname)) != NULL) {
+		dprintf(LOG_NOTICE, FNAME, "duplicated interface: %s", ifname);
+		return (NULL);
+	}
+
+	if ((ifp = malloc(sizeof(*ifp))) == NULL) {
+		dprintf(LOG_ERR, FNAME, "malloc failed");
+		goto fail;
+	}
+	memset(ifp, 0, sizeof(*ifp));
+
+	TAILQ_INIT(&ifp->event_list);
+
+	if ((ifp->ifname = strdup(ifname)) == NULL) {
+		dprintf(LOG_ERR, FNAME, "failed to copy ifname");
+		goto fail;
+	}
+
+	if (ifreset(ifp))
+		goto fail;
+
+	TAILQ_INIT(&ifp->reqopt_list);
+	TAILQ_INIT(&ifp->iaconf_list);
+
+	ifp->authproto = DHCP6_AUTHPROTO_UNDEF;
+	ifp->authalgorithm = DHCP6_AUTHALG_UNDEF;
+	ifp->authrdm = DHCP6_AUTHRDM_UNDEF;
+
+	ifp->next = dhcp6_if;
+	dhcp6_if = ifp;
+	return (ifp);
+
+  fail:
+	if (ifp->ifname != NULL)
+		free(ifp->ifname);
+	free(ifp);
+	return (NULL);
+}
+
+int
+ifreset(ifp)
+	struct dhcp6_if *ifp;
+{
+	unsigned int ifid;
+	u_int32_t linkid;
+
+	if ((ifid = if_nametoindex(ifp->ifname)) == 0) {
+		dprintf(LOG_ERR, FNAME, "invalid interface(%s): %s",
+			ifp->ifname, strerror(errno));
+		return (-1);
+	}
+
+#ifdef HAVE_SCOPELIB
+	if (inet_zoneid(AF_INET6, 2, ifname, &linkid)) {
+		dprintf(LOG_ERR, FNAME, "failed to get link ID for %s",
+		    ifname);
+		return (-1);
+	}
+#else
+	linkid = ifid;		/* XXX: assume 1to1 mapping IFs and links */
+#endif
+
+	ifp->ifid = ifid;
+	ifp->linkid = linkid;
+
+	return (0);
+}
+
+struct dhcp6_if *
+find_ifconfbyname(ifname)
+	char *ifname;
+{
+	struct dhcp6_if *ifp;
+
+	for (ifp = dhcp6_if; ifp; ifp = ifp->next) {
+		if (strcmp(ifp->ifname, ifname) == 0)
+			return (ifp);
+	}
+
+	return (NULL);
+}
+
+struct dhcp6_if *
+find_ifconfbyid(id)
+	unsigned int id;
+{
+	struct dhcp6_if *ifp;
+
+	for (ifp = dhcp6_if; ifp; ifp = ifp->next) {
+		if (ifp->ifid == id)
+			return (ifp);
+	}
+
+	return (NULL);
+}