From nobody Tue Apr 25 11:28:16 2023 X-Original-To: dev-commits-src-main@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4Q5KW43lkkz4745r; Tue, 25 Apr 2023 11:28:16 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Q5KW43ZQtz4CMJ; Tue, 25 Apr 2023 11:28:16 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1682422096; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Gs9l4m2Lowd9Y0CPxuvPI55VrO9/kw/wvTDHyx39U0Y=; b=n4gPy0+MLx5itjxNaNRuADzYJ7SzGfbJtrba24lQZc/4Lw75iy1j/1oxGBzZzRRmouUy+z F0j1Ak6wy4em5+joLy6DCsrnfOJFA+QaEkJfDUHqq1Y93YGqOFjhvyx1KFU1OT/KUPx6ai liaMrTgtj/AvfoP77XcN2CikBM8A+LAmDt3lMMBHlaa26ZKwvI8/iNpmzrlYIFpBf7Mddf i5thPr+MkOltjIOg69+glfow0wW/51m2USefR9QZgdElXMtOt5dAGjHKOT38nhY8hji2H3 yo8kHz253tzn18LxjeE3deR/0GDpAuXtJG2WoFolPiqt2oOuRVMD5FAQSOGPPQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1682422096; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Gs9l4m2Lowd9Y0CPxuvPI55VrO9/kw/wvTDHyx39U0Y=; b=ep/qJgEjC1efxOkq6WNoQNjaGqtxPIFcKQbfGgqhwKNmXnMKxvq/zarqy0RqvbQzLeS0vu MVUfXRkFUA9gerBVe+T7hpLhY7bzbu/hQPSpDYkUEOqlFvGKWa7rCxqaP77niSWMPfruw6 TkJzgxJECO56fW21/XpypcPadGZGPOhkiacGPr18Vn65A5nhrE/3/3z7fAYho7PGT6ZXa6 OhsYWdXPvoZ0FLrvwpZ/21gdO1wnu/7xOq4rujcC8Aigt3PM87w7rnVeewmBLGWpCAsI8R Emb9RbEbcc5jXhqy4QcQ79f+uZfcXJNJ7nceMGQ/2YAF3MRuZ1pCiJkgQbFSBQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1682422096; a=rsa-sha256; cv=none; b=BNJo+wDYjfNdOeIYr9SbLOBse9baNEpMVLt7hiALRx7/x2T/X2KuMggLlBGuKpZ1wWY89t ecD0g4fx8ut1TmtLlaUuWAEJ64zibSTQQZX2thjsz3tFJHzMdG68j+3xHjURaM2JnYtHv3 0iBZi0HBWZ1qmjR6IZ0TSXNTMHrp3EbagaxrXB0h+fRAQ1K9WB0pZSF1QqJV0zvYVwynQk 0qyOKmtaZbS5V7YnQzN0Glum2zSl+vV72/BXOfOfJnHZ7QTi33sjbMhWs4qlvO/EtfeSlz RJIPq9N1m24s1f4Ea0ZCQDLJAjKCwFprn6KBNSigkP6iL/MK6g0QYz2mKAhJwA== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4Q5KW42d0gz14yn; Tue, 25 Apr 2023 11:28:16 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 33PBSG2X029679; Tue, 25 Apr 2023 11:28:16 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 33PBSGTi029678; Tue, 25 Apr 2023 11:28:16 GMT (envelope-from git) Date: Tue, 25 Apr 2023 11:28:16 GMT Message-Id: <202304251128.33PBSGTi029678@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: "Alexander V. Chernikov" Subject: git: 6ad73dbf6504 - main - arp: convert arp(8) to netlink. List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-main@freebsd.org X-BeenThere: dev-commits-src-main@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: melifaro X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 6ad73dbf65048b0950a1ba6ff25607f6708c8954 Auto-Submitted: auto-generated X-ThisMailContainsUnwantedMimeParts: N The branch main has been updated by melifaro: URL: https://cgit.FreeBSD.org/src/commit/?id=6ad73dbf65048b0950a1ba6ff25607f6708c8954 commit 6ad73dbf65048b0950a1ba6ff25607f6708c8954 Author: Alexander V. Chernikov AuthorDate: 2023-04-25 11:24:42 +0000 Commit: Alexander V. Chernikov CommitDate: 2023-04-25 11:26:22 +0000 arp: convert arp(8) to netlink. The change is intended to be fully transparent to the users. Similarly to route(8) and netstat(8), arp can be build without netlink by defining WITHOUT_NETLINK in make.conf. Differential Revision: https://reviews.freebsd.org/D39720 --- usr.sbin/arp/Makefile | 11 ++ usr.sbin/arp/arp.c | 136 +++++++++----- usr.sbin/arp/arp.h | 21 +++ usr.sbin/arp/arp_netlink.c | 433 +++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 555 insertions(+), 46 deletions(-) diff --git a/usr.sbin/arp/Makefile b/usr.sbin/arp/Makefile index b6ff7a3e253c..17575181ceec 100644 --- a/usr.sbin/arp/Makefile +++ b/usr.sbin/arp/Makefile @@ -1,9 +1,20 @@ # @(#)Makefile 8.2 (Berkeley) 4/18/94 # $FreeBSD$ +.include + PROG= arp MAN= arp.4 arp.8 + +SRCS= arp.c + +.if ${MK_NETLINK_SUPPORT} != "no" +SRCS+= arp_netlink.c +.else +CFLAGS+=-DWITHOUT_NETLINK +.endif + LIBADD= xo WARNS?= 3 diff --git a/usr.sbin/arp/arp.c b/usr.sbin/arp/arp.c index e7c18b0f323f..5a6c58e99e78 100644 --- a/usr.sbin/arp/arp.c +++ b/usr.sbin/arp/arp.c @@ -74,6 +74,7 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include #include #include #include @@ -81,13 +82,12 @@ __FBSDID("$FreeBSD$"); #include #include #include +#include "arp.h" typedef void (action_fn)(struct sockaddr_dl *sdl, struct sockaddr_in *s_in, struct rt_msghdr *rtm); - -static int search(u_long addr, action_fn *action); -static action_fn print_entry; -static action_fn nuke_entry; +static void nuke_entries(uint32_t ifindex, struct in_addr addr); +static int print_entries(uint32_t ifindex, struct in_addr addr); static int delete(char *host); static void usage(void); @@ -97,17 +97,15 @@ static int file(char *name); static struct rt_msghdr *rtmsg(int cmd, struct sockaddr_in *dst, struct sockaddr_dl *sdl); static int get_ether_addr(in_addr_t ipaddr, struct ether_addr *hwaddr); -static struct sockaddr_in *getaddr(char *host); -static int valid_type(int type); +static int set_rtsock(struct sockaddr_in *dst, struct sockaddr_dl *sdl_m, + char *host); -static int nflag; /* no reverse dns lookups */ static char *rifname; -static time_t expire_time; -static int flags, doing_proxy; - struct if_nameindex *ifnameindex; +struct arp_opts opts = {}; + /* which function we're supposed to do */ #define F_GET 1 #define F_SET 2 @@ -124,7 +122,6 @@ main(int argc, char *argv[]) { int ch, func = 0; int rtn = 0; - int aflag = 0; /* do it for all entries */ argc = xo_parse_args(argc, argv); if (argc < 0) @@ -133,13 +130,13 @@ main(int argc, char *argv[]) while ((ch = getopt(argc, argv, "andfsSi:")) != -1) switch(ch) { case 'a': - aflag = 1; + opts.aflag = true; break; case 'd': SETFUNC(F_DELETE); break; case 'n': - nflag = 1; + opts.nflag = true; break; case 'S': SETFUNC(F_REPLACE); @@ -163,7 +160,7 @@ main(int argc, char *argv[]) if (!func) func = F_GET; if (rifname) { - if (func != F_GET && !(func == F_DELETE && aflag)) + if (func != F_GET && !(func == F_DELETE && opts.aflag)) xo_errx(1, "-i not applicable to this operation"); if (if_nametoindex(rifname) == 0) { if (errno == ENXIO) @@ -175,7 +172,7 @@ main(int argc, char *argv[]) } switch (func) { case F_GET: - if (aflag) { + if (opts.aflag) { if (argc != 0) usage(); @@ -183,7 +180,8 @@ main(int argc, char *argv[]) xo_open_container("arp"); xo_open_list("arp-cache"); - search(0, print_entry); + struct in_addr all_addrs = {}; + print_entries(0, all_addrs); xo_close_list("arp-cache"); xo_close_container("arp"); @@ -203,10 +201,11 @@ main(int argc, char *argv[]) rtn = set(argc, argv) ? 1 : 0; break; case F_DELETE: - if (aflag) { + if (opts.aflag) { if (argc != 0) usage(); - search(0, nuke_entry); + struct in_addr all_addrs = {}; + nuke_entries(0, all_addrs); } else { if (argc != 1) usage(); @@ -269,7 +268,7 @@ file(char *name) * the address of the host and returns a pointer to the * structure. */ -static struct sockaddr_in * +struct sockaddr_in * getaddr(char *host) { struct hostent *hp; @@ -290,10 +289,11 @@ getaddr(char *host) return (&reply); } +int valid_type(int type); /* * Returns true if the type is a valid one for ARP. */ -static int +int valid_type(int type) { @@ -318,10 +318,7 @@ valid_type(int type) static int set(int argc, char **argv) { - struct sockaddr_in *addr; struct sockaddr_in *dst; /* what are we looking for */ - struct sockaddr_dl *sdl; - struct rt_msghdr *rtm; struct ether_addr *ea; char *host = argv[0], *eaddr = argv[1]; struct sockaddr_dl sdl_m; @@ -336,21 +333,17 @@ set(int argc, char **argv) dst = getaddr(host); if (dst == NULL) return (1); - doing_proxy = flags = expire_time = 0; while (argc-- > 0) { if (strcmp(argv[0], "temp") == 0) { - struct timespec tp; int max_age; size_t len = sizeof(max_age); - clock_gettime(CLOCK_MONOTONIC, &tp); if (sysctlbyname("net.link.ether.inet.max_age", &max_age, &len, NULL, 0) != 0) xo_err(1, "sysctlbyname"); - expire_time = tp.tv_sec + max_age; + opts.expire_time = max_age; } else if (strcmp(argv[0], "pub") == 0) { - flags |= RTF_ANNOUNCE; - doing_proxy = 1; + opts.flags |= RTF_ANNOUNCE; if (argc && strcmp(argv[1], "only") == 0) { /* * Compatibility: in pre FreeBSD 8 times @@ -361,17 +354,17 @@ set(int argc, char **argv) argc--; argv++; } } else if (strcmp(argv[0], "blackhole") == 0) { - if (flags & RTF_REJECT) { + if (opts.flags & RTF_REJECT) { xo_errx(1, "Choose one of blackhole or reject, " "not both."); } - flags |= RTF_BLACKHOLE; + opts.flags |= RTF_BLACKHOLE; } else if (strcmp(argv[0], "reject") == 0) { - if (flags & RTF_BLACKHOLE) { + if (opts.flags & RTF_BLACKHOLE) { xo_errx(1, "Choose one of blackhole or reject, " "not both."); } - flags |= RTF_REJECT; + opts.flags |= RTF_REJECT; } else { xo_warnx("Invalid parameter '%s'", argv[0]); usage(); @@ -379,7 +372,7 @@ set(int argc, char **argv) argv++; } ea = (struct ether_addr *)LLADDR(&sdl_m); - if (doing_proxy && !strcmp(eaddr, "auto")) { + if ((opts.flags & RTF_ANNOUNCE) && !strcmp(eaddr, "auto")) { if (!get_ether_addr(dst->sin_addr.s_addr, ea)) { xo_warnx("no interface found for %s", inet_ntoa(dst->sin_addr)); @@ -397,6 +390,20 @@ set(int argc, char **argv) sdl_m.sdl_alen = ETHER_ADDR_LEN; } } +#ifndef WITHOUT_NETLINK + return (set_nl(0, dst, &sdl_m, host)); +#else + return (set_rtsock(dst, &sdl_m, host)); +#endif +} + +#ifdef WITHOUT_NETLINK +static int +set_rtsock(struct sockaddr_in *dst, struct sockaddr_dl *sdl_m, char *host) +{ + struct sockaddr_in *addr; + struct sockaddr_dl *sdl; + struct rt_msghdr *rtm; /* * In the case a proxy-arp entry is being added for @@ -420,10 +427,11 @@ set(int argc, char **argv) xo_warnx("cannot intuit interface index and type for %s", host); return (1); } - sdl_m.sdl_type = sdl->sdl_type; - sdl_m.sdl_index = sdl->sdl_index; - return (rtmsg(RTM_ADD, dst, &sdl_m) == NULL); + sdl_m->sdl_type = sdl->sdl_type; + sdl_m->sdl_index = sdl->sdl_index; + return (rtmsg(RTM_ADD, dst, sdl_m) == NULL); } +#endif /* * Display an individual arp entry @@ -442,7 +450,7 @@ get(char *host) xo_open_container("arp"); xo_open_list("arp-cache"); - found = search(addr->sin_addr.s_addr, print_entry); + found = print_entries(0, addr->sin_addr); if (found == 0) { xo_emit("{d:hostname/%s} ({d:ip-address/%s}) -- no entry", @@ -462,8 +470,9 @@ get(char *host) /* * Delete an arp entry */ +#ifdef WITHOUT_NETLINK static int -delete(char *host) +delete_rtsock(char *host) { struct sockaddr_in *addr, *dst; struct rt_msghdr *rtm; @@ -476,7 +485,7 @@ delete(char *host) /* * Perform a regular entry delete first. */ - flags &= ~RTF_ANNOUNCE; + opts.flags &= ~RTF_ANNOUNCE; for (;;) { /* try twice */ rtm = rtmsg(RTM_GET, dst, NULL); @@ -506,12 +515,12 @@ delete(char *host) * Regular entry delete failed, now check if there * is a proxy-arp entry to remove. */ - if (flags & RTF_ANNOUNCE) { + if (opts.flags & RTF_ANNOUNCE) { xo_warnx("delete: cannot locate %s", host); return (1); } - flags |= RTF_ANNOUNCE; + opts.flags |= RTF_ANNOUNCE; } rtm->rtm_flags |= RTF_LLDATA; if (rtmsg(RTM_DELETE, dst, NULL) != NULL) { @@ -520,6 +529,17 @@ delete(char *host) } return (1); } +#endif + +static int +delete(char *host) +{ +#ifdef WITHOUT_NETLINK + return (delete_rtsock(host)); +#else + return (delete_nl(0, host)); +#endif +} /* @@ -600,7 +620,7 @@ print_entry(struct sockaddr_dl *sdl, xo_open_instance("arp-cache"); - if (nflag == 0) + if (!opts.nflag) hp = gethostbyaddr((caddr_t)&(addr->sin_addr), sizeof addr->sin_addr, AF_INET); else @@ -610,7 +630,7 @@ print_entry(struct sockaddr_dl *sdl, else { host = "?"; if (h_errno == TRY_AGAIN) - nflag = 1; + opts.nflag = true; } xo_emit("{:hostname/%s} ({:ip-address/%s}) at ", host, inet_ntoa(addr->sin_addr)); @@ -640,6 +660,8 @@ print_entry(struct sockaddr_dl *sdl, xo_emit("{d:/ permanent}{en:permanent/true}"); else { static struct timespec tp; + time_t expire_time = 0; + if (tp.tv_sec == 0) clock_gettime(CLOCK_MONOTONIC, &tp); if ((expire_time = rtm->rtm_rmx.rmx_expire - tp.tv_sec) > 0) @@ -683,6 +705,17 @@ print_entry(struct sockaddr_dl *sdl, xo_close_instance("arp-cache"); } +static int +print_entries(uint32_t ifindex, struct in_addr addr) +{ +#ifndef WITHOUT_NETLINK + return (print_entries_nl(ifindex, addr)); +#else + return (search(addr.s_addr, print_entry)); +#endif +} + + /* * Nuke an arp entry */ @@ -699,6 +732,12 @@ nuke_entry(struct sockaddr_dl *sdl __unused, delete(ip); } +static void +nuke_entries(uint32_t ifindex, struct in_addr addr) +{ + search(addr.s_addr, nuke_entry); +} + static void usage(void) { @@ -745,7 +784,7 @@ rtmsg(int cmd, struct sockaddr_in *dst, struct sockaddr_dl *sdl) if (cmd == RTM_DELETE) goto doit; bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); - rtm->rtm_flags = flags; + rtm->rtm_flags = opts.flags; rtm->rtm_version = RTM_VERSION; switch (cmd) { @@ -753,7 +792,12 @@ rtmsg(int cmd, struct sockaddr_in *dst, struct sockaddr_dl *sdl) xo_errx(1, "internal wrong cmd"); case RTM_ADD: rtm->rtm_addrs |= RTA_GATEWAY; - rtm->rtm_rmx.rmx_expire = expire_time; + if (opts.expire_time != 0) { + struct timespec tp; + + clock_gettime(CLOCK_MONOTONIC, &tp); + rtm->rtm_rmx.rmx_expire = opts.expire_time + tp.tv_sec; + } rtm->rtm_inits = RTV_EXPIRE; rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); /* FALLTHROUGH */ diff --git a/usr.sbin/arp/arp.h b/usr.sbin/arp/arp.h new file mode 100644 index 000000000000..a7de3a1a3024 --- /dev/null +++ b/usr.sbin/arp/arp.h @@ -0,0 +1,21 @@ +#ifndef _USR_SBIN_ARP_ARP_H_ +#define _USR_SBIN_ARP_ARP_H_ + +int valid_type(int type); +struct sockaddr_in *getaddr(char *host); +int print_entries_nl(uint32_t ifindex, struct in_addr addr); + +struct arp_opts { + bool aflag; + bool nflag; + time_t expire_time; + int flags; +}; +extern struct arp_opts opts; + +int print_entries_nl(uint32_t ifindex, struct in_addr addr); +int delete_nl(uint32_t ifindex, char *host); +int set_nl(uint32_t ifindex, struct sockaddr_in *dst, struct sockaddr_dl *sdl, + char *host); + +#endif diff --git a/usr.sbin/arp/arp_netlink.c b/usr.sbin/arp/arp_netlink.c new file mode 100644 index 000000000000..a3481ff2d138 --- /dev/null +++ b/usr.sbin/arp/arp_netlink.c @@ -0,0 +1,433 @@ +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include "arp.h" + +#define RTF_ANNOUNCE RTF_PROTO2 + +static void +nl_init_socket(struct snl_state *ss) +{ + if (snl_init(ss, NETLINK_ROUTE)) + return; + + if (modfind("netlink") == -1 && errno == ENOENT) { + /* Try to load */ + if (kldload("netlink") == -1) + err(1, "netlink is not loaded and load attempt failed"); + if (snl_init(ss, NETLINK_ROUTE)) + return; + } + + err(1, "unable to open netlink socket"); +} + +static bool +get_link_info(struct snl_state *ss, uint32_t ifindex, + struct snl_parsed_link_simple *link) +{ + struct snl_writer nw; + + snl_init_writer(ss, &nw); + + struct nlmsghdr *hdr = snl_create_msg_request(&nw, RTM_GETLINK); + struct ifinfomsg *ifmsg = snl_reserve_msg_object(&nw, struct ifinfomsg); + if (ifmsg != NULL) + ifmsg->ifi_index = ifindex; + if (!snl_finalize_msg(&nw) || !snl_send_message(ss, hdr)) + return (false); + + hdr = snl_read_reply(ss, hdr->nlmsg_seq); + + if (hdr == NULL || hdr->nlmsg_type != RTM_NEWLINK) + return (false); + + if (!snl_parse_nlmsg(ss, hdr, &snl_rtm_link_parser_simple, link)) + return (false); + + return (true); +} + + + +static bool +has_l2(struct snl_state *ss, uint32_t ifindex) +{ + struct snl_parsed_link_simple link = {}; + + if (!get_link_info(ss, ifindex, &link)) + return (false); + + return (valid_type(link.ifi_type) != 0); +} + +static uint32_t +get_myfib() +{ + uint32_t fibnum = 0; + size_t len = sizeof(fibnum); + + sysctlbyname("net.my_fibnum", (void *)&fibnum, &len, NULL, 0); + + return (fibnum); +} + +static int +guess_ifindex(struct snl_state *ss, uint32_t fibnum, struct in_addr addr) +{ + struct snl_writer nw; + + snl_init_writer(ss, &nw); + + struct nlmsghdr *hdr = snl_create_msg_request(&nw, RTM_GETROUTE); + struct rtmsg *rtm = snl_reserve_msg_object(&nw, struct rtmsg); + rtm->rtm_family = AF_INET; + + struct sockaddr_in dst = { .sin_family = AF_INET, .sin_addr = addr }; + snl_add_msg_attr_ip(&nw, RTA_DST, (struct sockaddr *)&dst); + snl_add_msg_attr_u32(&nw, RTA_TABLE, fibnum); + + if (!snl_finalize_msg(&nw) || !snl_send_message(ss, hdr)) + return (0); + + hdr = snl_read_reply(ss, hdr->nlmsg_seq); + + if (hdr->nlmsg_type != NL_RTM_NEWROUTE) { + /* No route found, unable to guess ifindex */ + return (0); + } + + struct snl_parsed_route r = {}; + if (!snl_parse_nlmsg(ss, hdr, &snl_rtm_route_parser, &r)) + return (0); + + if (r.rta_multipath || (r.rta_rtflags & RTF_GATEWAY)) + return (0); + + /* Check if the interface is of supported type */ + if (has_l2(ss, r.rta_oif)) + return (r.rta_oif); + + /* Check the case when we matched the loopback route for P2P */ + snl_init_writer(ss, &nw); + hdr = snl_create_msg_request(&nw, RTM_GETNEXTHOP); + snl_reserve_msg_object(&nw, struct nhmsg); + + int off = snl_add_msg_attr_nested(&nw, NHA_FREEBSD); + snl_add_msg_attr_u32(&nw, NHAF_KID, r.rta_knh_id); + snl_add_msg_attr_u8(&nw, NHAF_FAMILY, AF_INET); + snl_add_msg_attr_u32(&nw, NHAF_TABLE, fibnum); + snl_end_attr_nested(&nw, off); + + if (!snl_finalize_msg(&nw) || !snl_send_message(ss, hdr)) + return (0); + + hdr = snl_read_reply(ss, hdr->nlmsg_seq); + + if (hdr->nlmsg_type != NL_RTM_NEWNEXTHOP) { + /* No nexthop found, unable to guess ifindex */ + return (0); + } + + struct snl_parsed_nhop nh = {}; + if (!snl_parse_nlmsg(ss, hdr, &snl_nhmsg_parser, &nh)) + return (0); + + return (nh.nhaf_aif); +} + +static uint32_t +fix_ifindex(struct snl_state *ss, uint32_t ifindex, struct in_addr addr) +{ + if (ifindex == 0) + ifindex = guess_ifindex(ss, get_myfib(), addr); + return (ifindex); +} + +static void +print_entry(struct snl_parsed_neigh *neigh, struct snl_parsed_link_simple *link) +{ + const char *host; + struct hostent *hp; + struct sockaddr_in *addr = (struct sockaddr_in *)neigh->nda_dst; + + xo_open_instance("arp-cache"); + + if (!opts.nflag) + hp = gethostbyaddr((caddr_t)&(addr->sin_addr), + sizeof(addr->sin_addr), AF_INET); + else + hp = 0; + if (hp) + host = hp->h_name; + else { + host = "?"; + if (h_errno == TRY_AGAIN) + opts.nflag = true; + } + xo_emit("{:hostname/%s} ({:ip-address/%s}) at ", host, + inet_ntoa(addr->sin_addr)); + if (neigh->nda_lladdr != NULL) { + struct sockaddr_dl sdl = { + .sdl_family = AF_LINK, + .sdl_type = link->ifi_type, + .sdl_len = sizeof(struct sockaddr_dl), + .sdl_alen = NLA_DATA_LEN(neigh->nda_lladdr), + }; + memcpy(sdl.sdl_data, NLA_DATA(neigh->nda_lladdr), sdl.sdl_alen); + + if ((sdl.sdl_type == IFT_ETHER || + sdl.sdl_type == IFT_L2VLAN || + sdl.sdl_type == IFT_BRIDGE) && + sdl.sdl_alen == ETHER_ADDR_LEN) + xo_emit("{:mac-address/%s}", + ether_ntoa((struct ether_addr *)LLADDR(&sdl))); + else { + + xo_emit("{:mac-address/%s}", link_ntoa(&sdl)); + } + } else + xo_emit("{d:/(incomplete)}{en:incomplete/true}"); + xo_emit(" on {:interface/%s}", link->ifla_ifname); + + if (neigh->ndaf_next_ts == 0) + xo_emit("{d:/ permanent}{en:permanent/true}"); + else { + time_t expire_time; + struct timeval now; + + gettimeofday(&now, 0); + if ((expire_time = neigh->ndaf_next_ts - now.tv_sec) > 0) + xo_emit(" expires in {:expires/%d} seconds", + (int)expire_time); + else + xo_emit("{d:/ expired}{en:expired/true}"); + } + + if (neigh->ndm_flags & NTF_PROXY) + xo_emit("{d:/ published}{en:published/true}"); + + switch(link->ifi_type) { + case IFT_ETHER: + xo_emit(" [{:type/ethernet}]"); + break; + case IFT_FDDI: + xo_emit(" [{:type/fddi}]"); + break; + case IFT_ATM: + xo_emit(" [{:type/atm}]"); + break; + case IFT_L2VLAN: + xo_emit(" [{:type/vlan}]"); + break; + case IFT_IEEE1394: + xo_emit(" [{:type/firewire}]"); + break; + case IFT_BRIDGE: + xo_emit(" [{:type/bridge}]"); + break; + case IFT_INFINIBAND: + xo_emit(" [{:type/infiniband}]"); + break; + default: + break; + } + + xo_emit("\n"); + + xo_close_instance("arp-cache"); +} + +int +print_entries_nl(uint32_t ifindex, struct in_addr addr) +{ + struct snl_state ss_req = {}, ss_cmd = {}; + struct snl_parsed_link_simple link = {}; + struct snl_writer nw; + + nl_init_socket(&ss_req); + snl_init_writer(&ss_req, &nw); + + struct nlmsghdr *hdr = snl_create_msg_request(&nw, RTM_GETNEIGH); + struct ndmsg *ndmsg = snl_reserve_msg_object(&nw, struct ndmsg); + if (ndmsg != NULL) { + ndmsg->ndm_family = AF_INET; + ndmsg->ndm_ifindex = ifindex; + } + + if (!snl_finalize_msg(&nw) || !snl_send_message(&ss_req, hdr)) { + snl_free(&ss_req); + return (0); + } + + uint32_t nlmsg_seq = hdr->nlmsg_seq; + struct snl_errmsg_data e = {}; + int count = 0; + nl_init_socket(&ss_cmd); + + while ((hdr = snl_read_reply_multi(&ss_req, nlmsg_seq, &e)) != NULL) { + struct snl_parsed_neigh neigh = {}; + + if (!snl_parse_nlmsg(&ss_req, hdr, &snl_rtm_neigh_parser, &neigh)) + continue; + + if (neigh.nda_ifindex != link.ifi_index) { + snl_clear_lb(&ss_cmd); + memset(&link, 0, sizeof(link)); + if (!get_link_info(&ss_cmd, neigh.nda_ifindex, &link)) + continue; + } + + print_entry(&neigh, &link); + count++; + snl_clear_lb(&ss_req); + } + + snl_free(&ss_req); + snl_free(&ss_cmd); + + return (count); +} + +int +delete_nl(uint32_t ifindex, char *host) +{ + struct snl_state ss = {}; + struct snl_writer nw; + struct sockaddr_in *dst; + + dst = getaddr(host); + if (dst == NULL) + return (1); + + nl_init_socket(&ss); + + ifindex = fix_ifindex(&ss, ifindex, dst->sin_addr); + if (ifindex == 0) { + xo_warnx("delete: cannot locate %s", host); + snl_free(&ss); + return (0); + } + + snl_init_writer(&ss, &nw); + struct nlmsghdr *hdr = snl_create_msg_request(&nw, RTM_DELNEIGH); + struct ndmsg *ndmsg = snl_reserve_msg_object(&nw, struct ndmsg); + if (ndmsg != NULL) { + ndmsg->ndm_family = AF_INET; + ndmsg->ndm_ifindex = ifindex; + } + snl_add_msg_attr_ip(&nw, NDA_DST, (struct sockaddr *)dst); + + if (!snl_finalize_msg(&nw) || !snl_send_message(&ss, hdr)) { + snl_free(&ss); + return (1); + } + + struct snl_errmsg_data e = {}; + snl_read_reply_code(&ss, hdr->nlmsg_seq, &e); + if (e.error != 0) { + if (e.error_str != NULL) + xo_warnx("delete %s: %s (%s)", host, strerror(e.error), e.error_str); + else + xo_warnx("delete %s: %s", host, strerror(e.error)); + } + snl_free(&ss); + + return (e.error != 0); +} + +int +set_nl(uint32_t ifindex, struct sockaddr_in *dst, struct sockaddr_dl *sdl, char *host) +{ + struct snl_state ss = {}; + struct snl_writer nw; + + nl_init_socket(&ss); + + ifindex = fix_ifindex(&ss, ifindex, dst->sin_addr); + if (ifindex == 0) { + xo_warnx("delete: cannot locate %s", host); + snl_free(&ss); + return (0); + } + + if (opts.expire_time != 0) + opts.flags &= ~RTF_STATIC; + printf("EXPIRE: %ld\n", opts.expire_time); + + snl_init_writer(&ss, &nw); + struct nlmsghdr *hdr = snl_create_msg_request(&nw, RTM_NEWNEIGH); + hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_REPLACE; + struct ndmsg *ndmsg = snl_reserve_msg_object(&nw, struct ndmsg); + if (ndmsg != NULL) { + uint8_t nl_flags = 0; + + ndmsg->ndm_family = AF_INET; + ndmsg->ndm_ifindex = ifindex; + ndmsg->ndm_state = (opts.flags & RTF_STATIC) ? NUD_PERMANENT : NUD_NONE; + + if (opts.flags & RTF_ANNOUNCE) + nl_flags |= NTF_PROXY; + if (opts.flags & RTF_STATIC) + nl_flags |= NTF_STICKY; + ndmsg->ndm_flags = nl_flags; + } + snl_add_msg_attr_ip(&nw, NDA_DST, (struct sockaddr *)dst); + snl_add_msg_attr(&nw, NDA_LLADDR, sdl->sdl_alen, LLADDR(sdl)); + + if (opts.expire_time != 0) { + struct timeval now; + + gettimeofday(&now, 0); + int off = snl_add_msg_attr_nested(&nw, NDA_FREEBSD); + snl_add_msg_attr_u32(&nw, NDAF_NEXT_STATE_TS, now.tv_sec + opts.expire_time); + snl_end_attr_nested(&nw, off); + } + + if (!snl_finalize_msg(&nw) || !snl_send_message(&ss, hdr)) { + snl_free(&ss); + return (1); + } + + struct snl_errmsg_data e = {}; + snl_read_reply_code(&ss, hdr->nlmsg_seq, &e); + if (e.error != 0) { + if (e.error_str != NULL) + xo_warnx("set: %s: %s (%s)", host, strerror(e.error), e.error_str); + else + xo_warnx("set %s: %s", host, strerror(e.error)); + } + snl_free(&ss); + + return (e.error != 0); +} +