ipadm_ndpd.c revision ec3706caae60369bd59b4a7a2de365fc74637504
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * CDDL HEADER START
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * The contents of this file are subject to the terms of the
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Common Development and Distribution License (the "License").
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * You may not use this file except in compliance with the License.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * or http://www.opensolaris.org/os/licensing.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * See the License for the specific language governing permissions
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * and limitations under the License.
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6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * If applicable, add the following below this CDDL HEADER, with the
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * fields enclosed by brackets "[]" replaced with your own identifying
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * information: Portions Copyright [yyyy] [name of copyright owner]
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * CDDL HEADER END
ec3706caae60369bd59b4a7a2de365fc74637504Vasumathi Sundaram * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * This file contains the functions that are required for communicating
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * with in.ndpd while creating autoconfigured addresses.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailstatic ipadm_status_t i_ipadm_create_linklocal(ipadm_handle_t,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailstatic void i_ipadm_make_linklocal(struct sockaddr_in6 *,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail const struct in6_addr *);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailstatic ipadm_status_t i_ipadm_send_ndpd_cmd(const char *,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail const struct ipadm_addrobj_s *, int);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Sends message to in.ndpd asking not to do autoconf for the given interface,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * until IPADM_CREATE_ADDRS or IPADM_ENABLE_AUTOCONF is sent.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_disable_autoconf(const char *ifname)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail return (i_ipadm_send_ndpd_cmd(ifname, NULL, IPADM_DISABLE_AUTOCONF));
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Sends message to in.ndpd to enable autoconf for the given interface,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * until another IPADM_DISABLE_AUTOCONF is sent.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_enable_autoconf(const char *ifname)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail return (i_ipadm_send_ndpd_cmd(ifname, NULL, IPADM_ENABLE_AUTOCONF));
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_create_ipv6addrs(ipadm_handle_t iph, ipadm_addrobj_t addr,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Create the link local based on the given token. If the same intfid
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * was already used with a different address object, this step will
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail status = i_ipadm_create_linklocal(iph, addr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Request in.ndpd to start the autoconfiguration.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * If autoconfiguration was already started by another means (e.g.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * "ifconfig" ), in.ndpd will return EEXIST.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if (addr->ipadm_stateless || addr->ipadm_stateful) {
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail status = i_ipadm_send_ndpd_cmd(addr->ipadm_ifname, addr,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail /* Persist the intfid. */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail status = i_ipadm_addr_persist(iph, addr, B_FALSE, i_flags);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) i_ipadm_send_ndpd_cmd(addr->ipadm_ifname, addr,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_delete_ipv6addrs(ipadm_handle_t iph, ipadm_addrobj_t ipaddr)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Send a msg to in.ndpd to remove the autoconfigured addresses,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * and delete the link local that was created.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail status = i_ipadm_send_ndpd_cmd(ipaddr->ipadm_ifname, ipaddr,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail status = i_ipadm_delete_addr(iph, ipaddr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_create_linklocal(ipadm_handle_t iph, ipadm_addrobj_t addr)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail in6_addr_t ll_template = {0xfe, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
ec3706caae60369bd59b4a7a2de365fc74637504Vasumathi Sundaram * Create a logical interface if needed.
ec3706caae60369bd59b4a7a2de365fc74637504Vasumathi Sundaram status = i_ipadm_setlifnum_addrobj(iph, addr);
ec3706caae60369bd59b4a7a2de365fc74637504Vasumathi Sundaram (void) strlcpy(lifr.lifr_name, addr->ipadm_ifname, LIFNAMSIZ);
ec3706caae60369bd59b4a7a2de365fc74637504Vasumathi Sundaram i_ipadm_addrobj2lifname(addr, lifr.lifr_name, sizeof (lifr.lifr_name));
ec3706caae60369bd59b4a7a2de365fc74637504Vasumathi Sundaram sin6 = (struct sockaddr_in6 *)&lifr.lifr_addr;
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail /* Create the link-local address */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail bzero(&lifr.lifr_addr, sizeof (lifr.lifr_addr));
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) plen2mask(PREFIXLEN_LINKLOCAL, AF_INET6, &lifr.lifr_addr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if ((err = ioctl(iph->iph_sock6, SIOCSLIFNETMASK, (caddr_t)&lifr)) < 0)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * If we have to use the default interface id,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * we just need to set the prefix to the link-local prefix.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * SIOCSLIFPREFIX sets the address with the given prefix
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * and the default interface id.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail err = ioctl(iph->iph_sock6, SIOCSLIFPREFIX, (caddr_t)&lifr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail /* Make a linklocal address in sin6 and set it */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail i_ipadm_make_linklocal(sin6, &addr->ipadm_intfid.sin6_addr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail err = ioctl(iph->iph_sock6, SIOCSLIFADDR, (caddr_t)&lifr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if ((err = ioctl(iph->iph_sock6, SIOCGLIFFLAGS, (char *)&lifr)) < 0)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if ((err = ioctl(iph->iph_sock6, SIOCSLIFFLAGS, (char *)&lifr)) < 0)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail /* Remove the linklocal that was created. */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) ioctl(iph->iph_sock6, SIOCLIFREMOVEIF, (caddr_t)&lifr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail sin6 = (struct sockaddr_in6 *)&lifr.lifr_addr;
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) ioctl(iph->iph_sock6, SIOCSLIFFLAGS, (caddr_t)&lifr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) ioctl(iph->iph_sock6, SIOCSLIFADDR, (caddr_t)&lifr);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Make a linklocal address based on the given intfid and copy it into
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * the output parameter `sin6'.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_make_linklocal(struct sockaddr_in6 *sin6, const struct in6_addr *intfid)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail in6_addr_t ll_template = {0xfe, 0x80, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail for (i = 0; i < 4; i++) {
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail sin6->sin6_addr.s6_addr[i] | ll_template.s6_addr[i];
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Function that forms an ndpd msg and sends it to the in.ndpd daemon's loopback
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * listener socket.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbaili_ipadm_send_ndpd_cmd(const char *ifname, const struct ipadm_addrobj_s *addr,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (cmd == IPADM_CREATE_ADDRS || cmd == IPADM_DELETE_ADDRS)) {
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail /* Put the socket in non-blocking mode */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) fcntl(fd, F_SETFL, flags | O_NONBLOCK);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail /* Connect to in.ndpd */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) strlcpy(servaddr.sun_path, IPADM_UDS_PATH,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if (connect(fd, (struct sockaddr *)&servaddr, sizeof (servaddr)) == -1)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) strlcpy(msg.inm_ifname, ifname, sizeof (msg.inm_ifname));
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail msg.inm_intfidlen = addr->ipadm_intfidlen;
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail msg.inm_stateless = addr->ipadm_stateless;
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail (void) strlcpy(msg.inm_aobjname, addr->ipadm_aobjname,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if (ipadm_ndpd_write(fd, &msg, sizeof (msg)) < 0)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if (ipadm_ndpd_read(fd, &retval, sizeof (retval)) < 0)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail if (cmd == IPADM_CREATE_ADDRS && retval == EEXIST)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Attempt to read `buflen' worth of bytes from `fd' into the buffer pointed
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * to by `buf'.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailipadm_ndpd_read(int fd, void *buffer, size_t buflen)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail ssize_t nbytes = 0; /* total bytes processed */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail ssize_t prbytes; /* per-round bytes processed */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Wait for data to come in or for the timeout to fire.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Descriptor is ready; have at it.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail prbytes = read(fd, (caddr_t)buffer + nbytes, buflen - nbytes);
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Write `buflen' bytes from `buffer' to open file `fd'. Returns 0
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * if all requested bytes were written, or an error code if not.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailipadm_ndpd_write(int fd, const void *buffer, size_t buflen)
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail for (nwritten = 0; nwritten < buflen; nwritten += nbytes) {