fi
])
-AC_DEFUN(BIRD_CHECK_LINUX_VERSION,
-[AC_CACHE_CHECK([Linux kernel version], bird_cv_sys_linux_version, [
-AC_REQUIRE_CPP()dnl
-cat > conftest.$ac_ext <<EOF
-[#]line __oline__ "configure"
-#include "confdefs.h"
-#include <linux/version.h>
-VERSION: UTS_RELEASE
-EOF
-bird_cv_sys_linux_version=`eval "$ac_cpp conftest.$ac_ext" 2>&AC_FD_CC | sed '/^VERSION/!d;s/^VERSION: "//;s/".*//'`
-rm -rf conftest*
-if test -z "$bird_cv_sys_linux_version" ; then
- AC_MSG_RESULT([unknown])
- AC_MSG_ERROR([Cannot determine kernel version])
-fi
-])])
-
AC_DEFUN(BIRD_CHECK_GCC_OPTIONS,
[AC_CACHE_VAL(bird_cv_c_option_no_pointer_sign, [
cat >conftest.c <<EOF
sysdesc=sysconfig
else
case "$ip:$host_os" in
- ipv4:linux*) BIRD_CHECK_LINUX_VERSION
+ ipv6:linux*) sysdesc=linux-v6
default_iproutedir="/etc/iproute2"
- case $bird_cv_sys_linux_version in
- 1.*|2.0.*) sysdesc=linux-20 ;;
- *) sysdesc=linux-22 ;;
- esac
;;
- ipv6:linux*) BIRD_CHECK_LINUX_VERSION
+ ipv4:linux*) sysdesc=linux
default_iproutedir="/etc/iproute2"
- case $bird_cv_sys_linux_version in
- 1.*|2.0.*) AC_MSG_ERROR([This version of Linux doesn't support IPv6.]) ;;
- *) sysdesc=linux-v6 ;;
- esac
;;
ipv6:netbsd*) sysdesc=bsd-v6
CPPFLAGS="$CPPFLAGS -I/usr/pkg/include"
AC_SUBST(protocols)
case $sysdesc in
- */linux-22*|*/linux-v6*)
+ */linux*|*/linux-v6*)
AC_CHECK_HEADER(linux/rtnetlink.h,,[AC_MSG_ERROR([Appropriate version of Linux kernel headers not found.])],[
#include <asm/types.h>
#include <sys/socket.h>
#include "lib/string.h"
#include "filter/filter.h"
-
// static inline void put_as(byte *data, u32 as) { put_u32(data, as); }
// static inline u32 get_as(byte *data) { return get_u32(data); }
-krt-scan.h
-krt-iface.h
-sysio.h
-krt-set.h
krt-sock.c
-krt-sock.h
+krt-sys.h
+sysio.h
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Socket Route Syncer -- Dummy Include File
- *
- * (c) 2004 Ondrej Filip <feela@network.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_IFACE_H_
-#define _BIRD_KRT_IFACE_H_
-
-/*
- * We don't have split iface/scan/set parts. See krt-sock.h.
- */
-
-struct kif_params {
-};
-
-struct kif_status {
-};
-
-
-static inline void kif_sys_init(struct kif_proto *p UNUSED) { }
-static inline int kif_sys_reconfigure(struct kif_proto *p UNUSED, struct kif_config *n UNUSED, struct kif_config *o UNUSED) { return 1; }
-
-static inline void kif_sys_preconfig(struct config *c UNUSED) { }
-static inline void kif_sys_postconfig(struct kif_config *c UNUSED) { }
-static inline void kif_sys_init_config(struct kif_config *c UNUSED) { }
-static inline void kif_sys_copy_config(struct kif_config *d UNUSED, struct kif_config *s UNUSED) { }
-
-static inline void kif_sys_io_init(void) { }
-
-#endif
+++ /dev/null
-/*
- * BIRD -- *BSD Kernel Route Syncer -- Scanning
- *
- * (c) 2004 Ondrej Filip <feela@network.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SCAN_H_
-#define _BIRD_KRT_SCAN_H_
-
-struct krt_scan_params {
-};
-
-struct krt_scan_status {
-};
-
-
-static inline void krt_sys_init(struct krt_proto *p UNUSED) { }
-static inline int krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n UNUSED, struct krt_config *o UNUSED) { return 1; }
-
-static inline void krt_sys_preconfig(struct config *c UNUSED) { }
-static inline void krt_sys_postconfig(struct krt_config *c UNUSED) { }
-static inline void krt_sys_init_config(struct krt_config *c UNUSED) { }
-static inline void krt_sys_copy_config(struct krt_config *d UNUSED, struct krt_config *s UNUSED) { }
-
-
-
-
-#endif
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Socket Route Syncer -- Dummy Include File
- *
- * (c) 2004 Ondrej Filip <feela@network.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SET_H_
-#define _BIRD_KRT_SET_H_
-
-/*
- * We don't have split iface/scan/set parts. See krt-sock.h.
- */
-#include "lib/krt-sock.h"
-
-#endif
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Route Syncer -- Setting
- *
- * (c) 2004 Ondrej Filip <feela@network.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SOCK_H_
-#define _BIRD_KRT_SOCK_H_
-
-struct krt_params {
-};
-
-struct krt_status {
-};
-
-static inline int krt_set_params_same(struct krt_set_params *o UNUSED, struct krt_set_params *n UNUSED) { return 1; }
-static inline void krt_set_copy_params(struct krt_set_params *d UNUSED, struct krt_set_params *s UNUSED) { }
-
-void krt_read_msg(struct proto *p, struct ks_msg *msg, int scan);
-
-#endif
CONFIG_SELF_CONSCIOUS We're able to recognize whether route was installed by us
CONFIG_MULTIPLE_TABLES The kernel supports multiple routing tables
CONFIG_ALL_TABLES_AT_ONCE Kernel scanner wants to process all tables at once
-CONFIG_MC_PROPER_SRC Multicast packets have source address according to socket saddr field
-CONFIG_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()
-CONFIG_UNIX_IFACE Use Unix interface scanner
-CONFIG_UNIX_SET Use Unix route setting
-CONFIG_UNIX_DONTROUTE Use setsockopts DONTROUTE (undef for *BSD)
+CONFIG_MC_PROPER_SRC Multicast packets have source address according to socket saddr field
CONFIG_SKIP_MC_BIND Don't call bind on multicast socket (def for *BSD)
-CONFIG_LINUX_SCAN Use Linux /proc/net/route scanner
-
-CONFIG_ALL_MULTICAST krt-iface: All devices support multicasting (i.e., ignore IFF_MULTICAST)
-CONFIG_UNNUM_MULTICAST krt-iface: We support multicasts on unnumbered PtP devices
-
-CONFIG_LINUX_MC_MREQN Linux: Use struct mreqn for multicasting
-CONFIG_LINUX_MC_MREQ Linux: Use struct mreq
-CONFIG_LINUX_MC_MREQ_BIND Linux: Use struct mreq and SO_BINDTODEVICE
+CONFIG_UNIX_DONTROUTE Use setsockopts DONTROUTE (undef for *BSD)
+CONFIG_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()
#define CONFIG_AUTO_ROUTES
#define CONFIG_SELF_CONSCIOUS
-#undef CONFIG_MULTIPLE_TABLES
-
-#undef CONFIG_UNIX_IFACE
-#undef CONFIG_UNIX_SET
#define CONFIG_SKIP_MC_BIND
-#define CONFIG_ALL_MULTICAST
-#define CONFIG_UNNUM_MULTICAST
/*
Link: sysdep/unix
#define CONFIG_AUTO_ROUTES
#define CONFIG_SELF_CONSCIOUS
-#undef CONFIG_MULTIPLE_TABLES
-
-#undef CONFIG_UNIX_IFACE
-#undef CONFIG_UNIX_SET
-#undef CONFIG_UNIX_DONTROUTE
#define CONFIG_SKIP_MC_BIND
-#define CONFIG_ALL_MULTICAST
-#define CONFIG_UNNUM_MULTICAST
/*
Link: sysdep/unix
+++ /dev/null
-/*
- * Configuration for Linux 2.0 based systems
- *
- * (c) 1998--1999 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#undef CONFIG_AUTO_ROUTES
-#undef CONFIG_SELF_CONSCIOUS
-#undef CONFIG_MULTIPLE_TABLES
-
-#define CONFIG_UNIX_IFACE
-#define CONFIG_UNIX_SET
-#define CONFIG_UNIX_DONTROUTE
-#undef CONFIG_SKIP_MC_BIND
-#define CONFIG_LINUX_SCAN
-
-#define CONFIG_LINUX_MC_MREQ_BIND
-#define CONFIG_ALL_MULTICAST
-#define CONFIG_UNNUM_MULTICAST
-
-/*
-Link: sysdep/linux
-Link: sysdep/unix
- */
+++ /dev/null
-/*
- * Configuration for Linux 2.1/2.2 based systems without Netlink
- *
- * (c) 1998--1999 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#define CONFIG_AUTO_ROUTES
-#undef CONFIG_SELF_CONSCIOUS
-#undef CONFIG_MULTIPLE_TABLES
-
-#define CONFIG_UNIX_IFACE
-#define CONFIG_UNIX_SET
-#define CONFIG_UNIX_DONTROUTE
-#undef CONFIG_SKIP_MC_BIND
-#define CONFIG_LINUX_SCAN
-
-#define CONFIG_LINUX_MC_MREQN
-#define CONFIG_ALL_MULTICAST
-#define CONFIG_UNNUM_MULTICAST
-
-/*
-Link: sysdep/linux
-Link: sysdep/unix
- */
+++ /dev/null
-/*
- * Configuration for Linux 2.2 based systems
- *
- * (c) 1998--1999 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#define CONFIG_AUTO_ROUTES
-#define CONFIG_SELF_CONSCIOUS
-#define CONFIG_MULTIPLE_TABLES
-#define CONFIG_ALL_TABLES_AT_ONCE
-#define CONFIG_MC_PROPER_SRC
-
-#undef CONFIG_SKIP_MC_BIND
-
-#define CONFIG_LINUX_MC_MREQN
-#define CONFIG_UNIX_DONTROUTE
-
-#define CONFIG_RESTRICTED_PRIVILEGES
-
-/*
-Link: sysdep/linux/netlink
-Link: sysdep/linux
-Link: sysdep/unix
- */
/*
- * Configuration for Linux 2.2 based systems running IPv6
+ * Configuration for Linux based systems running IPv6
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
#define IPV6
#define CONFIG_AUTO_ROUTES
-#define CONFIG_ALL_MULTICAST
#define CONFIG_SELF_CONSCIOUS
-
-/*
- * Netlink supports multiple tables, but kernel IPv6 code doesn't, so we
- * treat it as a multiple table system with number of tables set to 1.
- */
#define CONFIG_MULTIPLE_TABLES
#define CONFIG_ALL_TABLES_AT_ONCE
#define CONFIG_RESTRICTED_PRIVILEGES
/*
-Link: sysdep/linux/netlink
Link: sysdep/linux
Link: sysdep/unix
*/
-#ifdef CONFIG_LINUX_SCAN
-krt-scan.c
-krt-scan.h
-#endif
+krt-sys.h
+netlink.c
+netlink.Y
sysio.h
syspriv.h
+++ /dev/null
-/*
- * BIRD -- Linux Routing Table Scanning
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#include <stdio.h>
-#include <ctype.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <net/route.h>
-
-#undef LOCAL_DEBUG
-
-#include "nest/bird.h"
-#include "nest/route.h"
-#include "nest/protocol.h"
-#include "nest/iface.h"
-#include "lib/timer.h"
-#include "lib/unix.h"
-#include "lib/krt.h"
-#include "lib/string.h"
-
-static int krt_scan_fd = -1;
-
-struct iface *
-krt_temp_iface(struct krt_proto *p, char *name)
-{
- struct iface *i;
-
- WALK_LIST(i, p->scan.temp_ifs)
- if (!strcmp(i->name, name))
- return i;
- i = mb_allocz(p->p.pool, sizeof(struct iface));
- strcpy(i->name, name);
- add_tail(&p->scan.temp_ifs, &i->n);
- return i;
-}
-
-static void
-krt_parse_entry(byte *ent, struct krt_proto *p)
-{
- u32 dest0, gw0, mask0;
- ip_addr dest, gw, mask;
- unsigned int flags;
- int masklen;
- net *net;
- byte *iface = ent;
- rte *e;
-
- if (sscanf(ent, "%*s\t%x\t%x\t%x\t%*d\t%*d\t%*d\t%x\t", &dest0, &gw0, &flags, &mask0) != 4)
- {
- log(L_ERR "krt read: unable to parse `%s'", ent);
- return;
- }
- while (*ent != '\t')
- ent++;
- *ent = 0;
-
- dest = ipa_from_u32(dest0);
- ipa_ntoh(dest);
- gw = ipa_from_u32(gw0);
- ipa_ntoh(gw);
- mask = ipa_from_u32(mask0);
- ipa_ntoh(mask);
- if ((masklen = ipa_mklen(mask)) < 0)
- {
- log(L_ERR "krt read: invalid netmask %08x", mask0);
- return;
- }
- DBG("Got %I/%d via %I flags %x\n", dest, masklen, gw, flags);
-
- if (!(flags & RTF_UP))
- {
- DBG("Down.\n");
- return;
- }
- if (flags & RTF_HOST)
- masklen = 32;
- if (flags & (RTF_DYNAMIC | RTF_MODIFIED)) /* Redirect route */
- {
- log(L_WARN "krt: Ignoring redirect to %I/%d via %I", dest, masklen, gw);
- return;
- }
-
- net = net_get(p->p.table, dest, masklen);
-
- rta a = {
- .proto = &p->p,
- .source = RTS_INHERIT,
- .scope = SCOPE_UNIVERSE,
- .cast = RTC_UNICAST
- };
-
- if (flags & RTF_GATEWAY)
- {
- neighbor *ng = neigh_find(&p->p, &gw, 0);
- if (ng && ng->scope)
- a.iface = ng->iface;
- else
- {
- log(L_WARN "Kernel told us to use non-neighbor %I for %I/%d", gw, net->n.prefix, net->n.pxlen);
- return;
- }
- a.dest = RTD_ROUTER;
- a.gw = gw;
- }
- else if (flags & RTF_REJECT)
- {
- a.dest = RTD_UNREACHABLE;
- a.gw = IPA_NONE;
- }
- else if (isalpha(iface[0]))
- {
- a.dest = RTD_DEVICE;
- a.gw = IPA_NONE;
- a.iface = krt_temp_iface(p, iface);
- }
- else
- {
- log(L_WARN "Kernel reporting unknown route type to %I/%d", net->n.prefix, net->n.pxlen);
- return;
- }
-
- e = rte_get_temp(&a);
- e->net = net;
- e->u.krt.src = KRT_SRC_UNKNOWN;
- krt_got_route(p, e);
-}
-
-void
-krt_scan_fire(struct krt_proto *p)
-{
- byte buf[32768];
- int l, seen_hdr;
-
- if (krt_scan_fd < 0)
- {
- krt_scan_fd = open("/proc/net/route", O_RDONLY);
- if (krt_scan_fd < 0)
- die("/proc/net/route: %m");
- }
- else if (lseek(krt_scan_fd, 0, SEEK_SET) < 0)
- {
- log(L_ERR "krt seek: %m");
- return;
- }
- seen_hdr = 0;
- while ((l = read(krt_scan_fd, buf, sizeof(buf))) > 0)
- {
- byte *z = buf;
- if (l & 127)
- {
- log(L_ERR "krt read: misaligned entry: l=%d", l);
- return;
- }
- while (l >= 128)
- {
- if (seen_hdr++)
- krt_parse_entry(z, p);
- z += 128;
- l -= 128;
- }
- }
- if (l < 0)
- {
- log(L_ERR "krt read: %m");
- return;
- }
- DBG("KRT scan done, seen %d lines\n", seen_hdr);
-}
-
-void
-krt_scan_construct(struct krt_config *c)
-{
-}
-
-void
-krt_scan_preconfig(struct config *c)
-{
-}
-
-void
-krt_scan_postconfig(struct krt_config *c)
-{
-}
-
-void
-krt_scan_start(struct krt_proto *x, int first)
-{
- init_list(&x->scan.temp_ifs);
-}
-
-void
-krt_scan_shutdown(struct krt_proto *x, int last)
-{
-}
+++ /dev/null
-/*
- * BIRD -- Linux Kernel Route Syncer -- Scanning
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SCAN_H_
-#define _BIRD_KRT_SCAN_H_
-
-struct krt_scan_params {
-};
-
-struct krt_scan_status {
- list temp_ifs; /* Temporary interfaces */
-};
-
-static inline int krt_scan_params_same(struct krt_scan_params *o, struct krt_scan_params *n) { return 1; }
-
-#endif
+++ /dev/null
-krt-iface.h
-krt-set.h
-krt-scan.h
-netlink.c
-netlink.Y
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Netlink Interface Syncer -- Dummy Include File
- *
- * (c) 1998--1999 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_IFACE_H_
-#define _BIRD_KRT_IFACE_H_
-
-/*
- * We don't have split iface/scan/set parts. See krt-scan.h.
- */
-
-struct kif_params {
-};
-
-struct kif_status {
-};
-
-
-static inline void kif_sys_init(struct kif_proto *p UNUSED) { }
-static inline int kif_sys_reconfigure(struct kif_proto *p UNUSED, struct kif_config *n UNUSED, struct kif_config *o UNUSED) { return 1; }
-
-static inline void kif_sys_preconfig(struct config *c UNUSED) { }
-static inline void kif_sys_postconfig(struct kif_config *c UNUSED) { }
-static inline void kif_sys_init_config(struct kif_config *c UNUSED) { }
-static inline void kif_sys_copy_config(struct kif_config *d UNUSED, struct kif_config *s UNUSED) { }
-
-static inline void kif_sys_io_init(void) { }
-
-#endif
+++ /dev/null
-/*
- * BIRD -- Linux Kernel Netlink Route Syncer -- Scanning
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SCAN_H_
-#define _BIRD_KRT_SCAN_H_
-
-/*
- * We don't have split iface/scan/set for Netlink. All options
- * and run-time parameters are declared here instead of splitting
- * to krt-set.h, krt-iface.h and this file.
- */
-
-#define NL_NUM_TABLES 256
-
-struct krt_params {
- int table_id; /* Kernel table ID we sync with */
-};
-
-struct krt_status {
-};
-
-
-static inline void krt_sys_init(struct krt_proto *p UNUSED) { }
-
-#endif
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Netlink Route Syncer -- Dummy Include File
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SET_H_
-#define _BIRD_KRT_SET_H_
-
-/*
- * We don't have split iface/scan/set parts. See krt-scan.h.
- */
-
-struct krt_set_params {
-};
-
-struct krt_set_status {
-};
-
-static inline void krt_set_construct(struct krt_config *c UNUSED) { };
-static inline void krt_set_start(struct krt_proto *p UNUSED, int first UNUSED) { };
-static inline void krt_set_shutdown(struct krt_proto *p UNUSED, int last UNUSED) { };
-static inline int krt_set_params_same(struct krt_set_params *o UNUSED, struct krt_set_params *n UNUSED) { return 1; }
-static inline void krt_set_copy_params(struct krt_set_params *d UNUSED, struct krt_set_params *s UNUSED) { }
-
-#endif
+++ /dev/null
-/*
- * BIRD -- Linux Netlink Configuration
- *
- * (c) 1999--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-CF_HDR
-
-CF_DECLS
-
-CF_KEYWORDS(ASYNC, KERNEL, TABLE, KRT_PREFSRC, KRT_REALM)
-
-CF_GRAMMAR
-
-CF_ADDTO(kern_proto, kern_proto nl_item ';')
-
-nl_item:
- KERNEL TABLE expr {
- if ($3 <= 0 || $3 >= NL_NUM_TABLES)
- cf_error("Kernel routing table number out of range");
- THIS_KRT->sys.table_id = $3;
- }
- ;
-
-CF_ADDTO(dynamic_attr, KRT_PREFSRC { $$ = f_new_dynamic_attr(EAF_TYPE_IP_ADDRESS, T_IP, EA_KRT_PREFSRC); })
-CF_ADDTO(dynamic_attr, KRT_REALM { $$ = f_new_dynamic_attr(EAF_TYPE_INT, T_INT, EA_KRT_REALM); })
-
-CF_CODE
-
-CF_END
+++ /dev/null
-/*
- * BIRD -- Linux Netlink Interface
- *
- * (c) 1999--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#include <stdio.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-#include <errno.h>
-
-#undef LOCAL_DEBUG
-
-#include "nest/bird.h"
-#include "nest/route.h"
-#include "nest/protocol.h"
-#include "nest/iface.h"
-#include "lib/alloca.h"
-#include "lib/timer.h"
-#include "lib/unix.h"
-#include "lib/krt.h"
-#include "lib/socket.h"
-#include "lib/string.h"
-#include "conf/conf.h"
-
-#include <asm/types.h>
-#include <linux/if.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-
-#ifndef MSG_TRUNC /* Hack: Several versions of glibc miss this one :( */
-#define MSG_TRUNC 0x20
-#endif
-
-#ifndef IFF_LOWER_UP
-#define IFF_LOWER_UP 0x10000
-#endif
-
-/*
- * Synchronous Netlink interface
- */
-
-struct nl_sock
-{
- int fd;
- u32 seq;
- byte *rx_buffer; /* Receive buffer */
- struct nlmsghdr *last_hdr; /* Recently received packet */
- unsigned int last_size;
-};
-
-#define NL_RX_SIZE 8192
-
-static struct nl_sock nl_scan = {.fd = -1}; /* Netlink socket for synchronous scan */
-static struct nl_sock nl_req = {.fd = -1}; /* Netlink socket for requests */
-
-static void
-nl_open_sock(struct nl_sock *nl)
-{
- if (nl->fd < 0)
- {
- nl->fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (nl->fd < 0)
- die("Unable to open rtnetlink socket: %m");
- nl->seq = now;
- nl->rx_buffer = xmalloc(NL_RX_SIZE);
- nl->last_hdr = NULL;
- nl->last_size = 0;
- }
-}
-
-static void
-nl_open(void)
-{
- nl_open_sock(&nl_scan);
- nl_open_sock(&nl_req);
-}
-
-static void
-nl_send(struct nl_sock *nl, struct nlmsghdr *nh)
-{
- struct sockaddr_nl sa;
-
- memset(&sa, 0, sizeof(sa));
- sa.nl_family = AF_NETLINK;
- nh->nlmsg_pid = 0;
- nh->nlmsg_seq = ++(nl->seq);
- if (sendto(nl->fd, nh, nh->nlmsg_len, 0, (struct sockaddr *)&sa, sizeof(sa)) < 0)
- die("rtnetlink sendto: %m");
- nl->last_hdr = NULL;
-}
-
-static void
-nl_request_dump(int cmd)
-{
- struct {
- struct nlmsghdr nh;
- struct rtgenmsg g;
- } req;
- req.nh.nlmsg_type = cmd;
- req.nh.nlmsg_len = sizeof(req);
- req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
- /* Is it important which PF_* is used for link-level interface scan?
- It seems that some information is available only when PF_INET is used. */
- req.g.rtgen_family = (cmd == RTM_GETLINK) ? PF_INET : BIRD_PF;
- nl_send(&nl_scan, &req.nh);
-}
-
-static struct nlmsghdr *
-nl_get_reply(struct nl_sock *nl)
-{
- for(;;)
- {
- if (!nl->last_hdr)
- {
- struct iovec iov = { nl->rx_buffer, NL_RX_SIZE };
- struct sockaddr_nl sa;
- struct msghdr m = { (struct sockaddr *) &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
- int x = recvmsg(nl->fd, &m, 0);
- if (x < 0)
- die("nl_get_reply: %m");
- if (sa.nl_pid) /* It isn't from the kernel */
- {
- DBG("Non-kernel packet\n");
- continue;
- }
- nl->last_size = x;
- nl->last_hdr = (void *) nl->rx_buffer;
- if (m.msg_flags & MSG_TRUNC)
- bug("nl_get_reply: got truncated reply which should be impossible");
- }
- if (NLMSG_OK(nl->last_hdr, nl->last_size))
- {
- struct nlmsghdr *h = nl->last_hdr;
- nl->last_hdr = NLMSG_NEXT(h, nl->last_size);
- if (h->nlmsg_seq != nl->seq)
- {
- log(L_WARN "nl_get_reply: Ignoring out of sequence netlink packet (%x != %x)",
- h->nlmsg_seq, nl->seq);
- continue;
- }
- return h;
- }
- if (nl->last_size)
- log(L_WARN "nl_get_reply: Found packet remnant of size %d", nl->last_size);
- nl->last_hdr = NULL;
- }
-}
-
-static struct rate_limit rl_netlink_err;
-
-static int
-nl_error(struct nlmsghdr *h)
-{
- struct nlmsgerr *e;
- int ec;
-
- if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
- {
- log(L_WARN "Netlink: Truncated error message received");
- return ENOBUFS;
- }
- e = (struct nlmsgerr *) NLMSG_DATA(h);
- ec = -e->error;
- if (ec)
- log_rl(&rl_netlink_err, L_WARN "Netlink: %s", strerror(ec));
- return ec;
-}
-
-static struct nlmsghdr *
-nl_get_scan(void)
-{
- struct nlmsghdr *h = nl_get_reply(&nl_scan);
-
- if (h->nlmsg_type == NLMSG_DONE)
- return NULL;
- if (h->nlmsg_type == NLMSG_ERROR)
- {
- nl_error(h);
- return NULL;
- }
- return h;
-}
-
-static int
-nl_exchange(struct nlmsghdr *pkt)
-{
- struct nlmsghdr *h;
-
- nl_send(&nl_req, pkt);
- for(;;)
- {
- h = nl_get_reply(&nl_req);
- if (h->nlmsg_type == NLMSG_ERROR)
- break;
- log(L_WARN "nl_exchange: Unexpected reply received");
- }
- return nl_error(h) ? -1 : 0;
-}
-
-/*
- * Netlink attributes
- */
-
-static int nl_attr_len;
-
-static void *
-nl_checkin(struct nlmsghdr *h, int lsize)
-{
- nl_attr_len = h->nlmsg_len - NLMSG_LENGTH(lsize);
- if (nl_attr_len < 0)
- {
- log(L_ERR "nl_checkin: underrun by %d bytes", -nl_attr_len);
- return NULL;
- }
- return NLMSG_DATA(h);
-}
-
-static int
-nl_parse_attrs(struct rtattr *a, struct rtattr **k, int ksize)
-{
- int max = ksize / sizeof(struct rtattr *);
- bzero(k, ksize);
- while (RTA_OK(a, nl_attr_len))
- {
- if (a->rta_type < max)
- k[a->rta_type] = a;
- a = RTA_NEXT(a, nl_attr_len);
- }
- if (nl_attr_len)
- {
- log(L_ERR "nl_parse_attrs: remnant of size %d", nl_attr_len);
- return 0;
- }
- else
- return 1;
-}
-
-void
-nl_add_attr(struct nlmsghdr *h, unsigned bufsize, unsigned code,
- void *data, unsigned dlen)
-{
- unsigned len = RTA_LENGTH(dlen);
- unsigned pos = NLMSG_ALIGN(h->nlmsg_len);
- struct rtattr *a;
-
- if (pos + len > bufsize)
- bug("nl_add_attr: packet buffer overflow");
- a = (struct rtattr *)((char *)h + pos);
- a->rta_type = code;
- a->rta_len = len;
- h->nlmsg_len = pos + len;
- memcpy(RTA_DATA(a), data, dlen);
-}
-
-static inline void
-nl_add_attr_u32(struct nlmsghdr *h, unsigned bufsize, int code, u32 data)
-{
- nl_add_attr(h, bufsize, code, &data, 4);
-}
-
-static inline void
-nl_add_attr_ipa(struct nlmsghdr *h, unsigned bufsize, int code, ip_addr ipa)
-{
- ipa_hton(ipa);
- nl_add_attr(h, bufsize, code, &ipa, sizeof(ipa));
-}
-
-#define RTNH_SIZE (sizeof(struct rtnexthop) + sizeof(struct rtattr) + sizeof(ip_addr))
-
-static inline void
-add_mpnexthop(char *buf, ip_addr ipa, unsigned iface, unsigned char weight)
-{
- struct rtnexthop *nh = (void *) buf;
- struct rtattr *rt = (void *) (buf + sizeof(*nh));
- nh->rtnh_len = RTNH_SIZE;
- nh->rtnh_flags = 0;
- nh->rtnh_hops = weight;
- nh->rtnh_ifindex = iface;
- rt->rta_len = sizeof(*rt) + sizeof(ipa);
- rt->rta_type = RTA_GATEWAY;
- ipa_hton(ipa);
- memcpy(buf + sizeof(*nh) + sizeof(*rt), &ipa, sizeof(ipa));
-}
-
-
-static void
-nl_add_multipath(struct nlmsghdr *h, unsigned bufsize, struct mpnh *nh)
-{
- unsigned len = sizeof(struct rtattr);
- unsigned pos = NLMSG_ALIGN(h->nlmsg_len);
- char *buf = (char *)h + pos;
- struct rtattr *rt = (void *) buf;
- buf += len;
-
- for (; nh; nh = nh->next)
- {
- len += RTNH_SIZE;
- if (pos + len > bufsize)
- bug("nl_add_multipath: packet buffer overflow");
-
- add_mpnexthop(buf, nh->gw, nh->iface->index, nh->weight);
- buf += RTNH_SIZE;
- }
-
- rt->rta_type = RTA_MULTIPATH;
- rt->rta_len = len;
- h->nlmsg_len = pos + len;
-}
-
-
-static struct mpnh *
-nl_parse_multipath(struct krt_proto *p, struct rtattr *ra)
-{
- /* Temporary buffer for multicast nexthops */
- static struct mpnh *nh_buffer;
- static int nh_buf_size; /* in number of structures */
- static int nh_buf_used;
-
- struct rtattr *a[RTA_CACHEINFO+1];
- struct rtnexthop *nh = RTA_DATA(ra);
- struct mpnh *rv, *first, **last;
- int len = RTA_PAYLOAD(ra);
-
- first = NULL;
- last = &first;
- nh_buf_used = 0;
-
- while (len)
- {
- /* Use RTNH_OK(nh,len) ?? */
- if ((len < sizeof(*nh)) || (len < nh->rtnh_len))
- return NULL;
-
- if (nh_buf_used == nh_buf_size)
- {
- nh_buf_size = nh_buf_size ? (nh_buf_size * 2) : 4;
- nh_buffer = xrealloc(nh_buffer, nh_buf_size * sizeof(struct mpnh));
- }
- *last = rv = nh_buffer + nh_buf_used++;
- rv->next = NULL;
- last = &(rv->next);
-
- rv->weight = nh->rtnh_hops;
- rv->iface = if_find_by_index(nh->rtnh_ifindex);
- if (!rv->iface)
- return NULL;
-
- /* Nonexistent RTNH_PAYLOAD ?? */
- nl_attr_len = nh->rtnh_len - RTNH_LENGTH(0);
- nl_parse_attrs(RTNH_DATA(nh), a, sizeof(a));
- if (a[RTA_GATEWAY])
- {
- if (RTA_PAYLOAD(a[RTA_GATEWAY]) != sizeof(ip_addr))
- return NULL;
-
- memcpy(&rv->gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ip_addr));
- ipa_ntoh(rv->gw);
-
- neighbor *ng = neigh_find2(&p->p, &rv->gw, rv->iface,
- (nh->rtnh_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
- if (!ng || (ng->scope == SCOPE_HOST))
- return NULL;
- }
- else
- return NULL;
-
- len -= NLMSG_ALIGN(nh->rtnh_len);
- nh = RTNH_NEXT(nh);
- }
-
- return first;
-}
-
-
-/*
- * Scanning of interfaces
- */
-
-static void
-nl_parse_link(struct nlmsghdr *h, int scan)
-{
- struct ifinfomsg *i;
- struct rtattr *a[IFLA_WIRELESS+1];
- int new = h->nlmsg_type == RTM_NEWLINK;
- struct iface f = {};
- struct iface *ifi;
- char *name;
- u32 mtu;
- unsigned int fl;
-
- if (!(i = nl_checkin(h, sizeof(*i))) || !nl_parse_attrs(IFLA_RTA(i), a, sizeof(a)))
- return;
- if (!a[IFLA_IFNAME] || RTA_PAYLOAD(a[IFLA_IFNAME]) < 2 ||
- !a[IFLA_MTU] || RTA_PAYLOAD(a[IFLA_MTU]) != 4)
- {
- if (scan || !a[IFLA_WIRELESS])
- log(L_ERR "nl_parse_link: Malformed message received");
- return;
- }
- name = RTA_DATA(a[IFLA_IFNAME]);
- memcpy(&mtu, RTA_DATA(a[IFLA_MTU]), sizeof(u32));
-
- ifi = if_find_by_index(i->ifi_index);
- if (!new)
- {
- DBG("KIF: IF%d(%s) goes down\n", i->ifi_index, name);
- if (!ifi)
- return;
-
- if_delete(ifi);
- }
- else
- {
- DBG("KIF: IF%d(%s) goes up (mtu=%d,flg=%x)\n", i->ifi_index, name, mtu, i->ifi_flags);
- if (ifi && strncmp(ifi->name, name, sizeof(ifi->name)-1))
- if_delete(ifi);
-
- strncpy(f.name, name, sizeof(f.name)-1);
- f.index = i->ifi_index;
- f.mtu = mtu;
-
- fl = i->ifi_flags;
- if (fl & IFF_UP)
- f.flags |= IF_ADMIN_UP;
- if (fl & IFF_LOWER_UP)
- f.flags |= IF_LINK_UP;
- if (fl & IFF_LOOPBACK) /* Loopback */
- f.flags |= IF_MULTIACCESS | IF_LOOPBACK | IF_IGNORE;
- else if (fl & IFF_POINTOPOINT) /* PtP */
- f.flags |= IF_MULTICAST;
- else if (fl & IFF_BROADCAST) /* Broadcast */
- f.flags |= IF_MULTIACCESS | IF_BROADCAST | IF_MULTICAST;
- else
- f.flags |= IF_MULTIACCESS; /* NBMA */
- if_update(&f);
- }
-}
-
-static void
-nl_parse_addr(struct nlmsghdr *h)
-{
- struct ifaddrmsg *i;
- struct rtattr *a[IFA_ANYCAST+1];
- int new = h->nlmsg_type == RTM_NEWADDR;
- struct ifa ifa;
- struct iface *ifi;
- int scope;
-
- if (!(i = nl_checkin(h, sizeof(*i))) || !nl_parse_attrs(IFA_RTA(i), a, sizeof(a)))
- return;
- if (i->ifa_family != BIRD_AF)
- return;
- if (!a[IFA_ADDRESS] || RTA_PAYLOAD(a[IFA_ADDRESS]) != sizeof(ip_addr)
-#ifdef IPV6
- || a[IFA_LOCAL] && RTA_PAYLOAD(a[IFA_LOCAL]) != sizeof(ip_addr)
-#else
- || !a[IFA_LOCAL] || RTA_PAYLOAD(a[IFA_LOCAL]) != sizeof(ip_addr)
- || (a[IFA_BROADCAST] && RTA_PAYLOAD(a[IFA_BROADCAST]) != sizeof(ip_addr))
-#endif
- )
- {
- log(L_ERR "nl_parse_addr: Malformed message received");
- return;
- }
-
- ifi = if_find_by_index(i->ifa_index);
- if (!ifi)
- {
- log(L_ERR "KIF: Received address message for unknown interface %d", i->ifa_index);
- return;
- }
-
- bzero(&ifa, sizeof(ifa));
- ifa.iface = ifi;
- if (i->ifa_flags & IFA_F_SECONDARY)
- ifa.flags |= IA_SECONDARY;
-
- /* IFA_LOCAL can be unset for IPv6 interfaces */
- memcpy(&ifa.ip, RTA_DATA(a[IFA_LOCAL] ? : a[IFA_ADDRESS]), sizeof(ifa.ip));
- ipa_ntoh(ifa.ip);
- ifa.pxlen = i->ifa_prefixlen;
- if (i->ifa_prefixlen > BITS_PER_IP_ADDRESS)
- {
- log(L_ERR "KIF: Invalid prefix length for interface %s: %d", ifi->name, i->ifa_prefixlen);
- new = 0;
- }
- if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS)
- {
- ip_addr addr;
- memcpy(&addr, RTA_DATA(a[IFA_ADDRESS]), sizeof(addr));
- ipa_ntoh(addr);
- ifa.prefix = ifa.brd = addr;
-
- /* It is either a host address or a peer address */
- if (ipa_equal(ifa.ip, addr))
- ifa.flags |= IA_HOST;
- else
- {
- ifa.flags |= IA_PEER;
- ifa.opposite = addr;
- }
- }
- else
- {
- ip_addr netmask = ipa_mkmask(ifa.pxlen);
- ifa.prefix = ipa_and(ifa.ip, netmask);
- ifa.brd = ipa_or(ifa.ip, ipa_not(netmask));
- if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS - 1)
- ifa.opposite = ipa_opposite_m1(ifa.ip);
-
-#ifndef IPV6
- if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS - 2)
- ifa.opposite = ipa_opposite_m2(ifa.ip);
-
- if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST])
- {
- ip_addr xbrd;
- memcpy(&xbrd, RTA_DATA(a[IFA_BROADCAST]), sizeof(xbrd));
- ipa_ntoh(xbrd);
- if (ipa_equal(xbrd, ifa.prefix) || ipa_equal(xbrd, ifa.brd))
- ifa.brd = xbrd;
- else if (ifi->flags & IF_TMP_DOWN) /* Complain only during the first scan */
- log(L_ERR "KIF: Invalid broadcast address %I for %s", xbrd, ifi->name);
- }
-#endif
- }
-
- scope = ipa_classify(ifa.ip);
- if (scope < 0)
- {
- log(L_ERR "KIF: Invalid interface address %I for %s", ifa.ip, ifi->name);
- return;
- }
- ifa.scope = scope & IADDR_SCOPE_MASK;
-
- DBG("KIF: IF%d(%s): %s IPA %I, flg %x, net %I/%d, brd %I, opp %I\n",
- ifi->index, ifi->name,
- new ? "added" : "removed",
- ifa.ip, ifa.flags, ifa.prefix, ifa.pxlen, ifa.brd, ifa.opposite);
- if (new)
- ifa_update(&ifa);
- else
- ifa_delete(&ifa);
-}
-
-void
-kif_do_scan(struct kif_proto *p UNUSED)
-{
- struct nlmsghdr *h;
-
- if_start_update();
-
- nl_request_dump(RTM_GETLINK);
- while (h = nl_get_scan())
- if (h->nlmsg_type == RTM_NEWLINK || h->nlmsg_type == RTM_DELLINK)
- nl_parse_link(h, 1);
- else
- log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
-
- nl_request_dump(RTM_GETADDR);
- while (h = nl_get_scan())
- if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
- nl_parse_addr(h);
- else
- log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
-
- if_end_update();
-}
-
-/*
- * Routes
- */
-
-static struct krt_proto *nl_table_map[NL_NUM_TABLES];
-
-int
-krt_capable(rte *e)
-{
- rta *a = e->attrs;
-
- if (a->cast != RTC_UNICAST)
- return 0;
-
- switch (a->dest)
- {
- case RTD_ROUTER:
- case RTD_DEVICE:
- if (a->iface == NULL)
- return 0;
- case RTD_BLACKHOLE:
- case RTD_UNREACHABLE:
- case RTD_PROHIBIT:
- case RTD_MULTIPATH:
- break;
- default:
- return 0;
- }
- return 1;
-}
-
-static inline int
-nh_bufsize(struct mpnh *nh)
-{
- int rv = 0;
- for (; nh != NULL; nh = nh->next)
- rv += RTNH_SIZE;
- return rv;
-}
-
-static int
-nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int new)
-{
- eattr *ea;
- net *net = e->net;
- rta *a = e->attrs;
- struct {
- struct nlmsghdr h;
- struct rtmsg r;
- char buf[128 + nh_bufsize(a->nexthops)];
- } r;
-
- DBG("nl_send_route(%I/%d,new=%d)\n", net->n.prefix, net->n.pxlen, new);
-
- bzero(&r.h, sizeof(r.h));
- bzero(&r.r, sizeof(r.r));
- r.h.nlmsg_type = new ? RTM_NEWROUTE : RTM_DELROUTE;
- r.h.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
- r.h.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | (new ? NLM_F_CREATE|NLM_F_EXCL : 0);
-
- r.r.rtm_family = BIRD_AF;
- r.r.rtm_dst_len = net->n.pxlen;
- r.r.rtm_tos = 0;
- r.r.rtm_table = KRT_CF->sys.table_id;
- r.r.rtm_protocol = RTPROT_BIRD;
- r.r.rtm_scope = RT_SCOPE_UNIVERSE;
- nl_add_attr_ipa(&r.h, sizeof(r), RTA_DST, net->n.prefix);
-
- u32 metric = 0;
- if (new && e->attrs->source == RTS_INHERIT)
- metric = e->u.krt.metric;
- if (ea = ea_find(eattrs, EA_KRT_METRIC))
- metric = ea->u.data;
- if (metric != 0)
- nl_add_attr_u32(&r.h, sizeof(r), RTA_PRIORITY, metric);
-
- if (ea = ea_find(eattrs, EA_KRT_PREFSRC))
- nl_add_attr_ipa(&r.h, sizeof(r), RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data);
-
- if (ea = ea_find(eattrs, EA_KRT_REALM))
- nl_add_attr_u32(&r.h, sizeof(r), RTA_FLOW, ea->u.data);
-
- /* a->iface != NULL checked in krt_capable() for router and device routes */
-
- switch (a->dest)
- {
- case RTD_ROUTER:
- r.r.rtm_type = RTN_UNICAST;
- nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, a->iface->index);
- nl_add_attr_ipa(&r.h, sizeof(r), RTA_GATEWAY, a->gw);
- break;
- case RTD_DEVICE:
- r.r.rtm_type = RTN_UNICAST;
- nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, a->iface->index);
- break;
- case RTD_BLACKHOLE:
- r.r.rtm_type = RTN_BLACKHOLE;
- break;
- case RTD_UNREACHABLE:
- r.r.rtm_type = RTN_UNREACHABLE;
- break;
- case RTD_PROHIBIT:
- r.r.rtm_type = RTN_PROHIBIT;
- break;
- case RTD_MULTIPATH:
- r.r.rtm_type = RTN_UNICAST;
- nl_add_multipath(&r.h, sizeof(r), a->nexthops);
- break;
- default:
- bug("krt_capable inconsistent with nl_send_route");
- }
-
- return nl_exchange(&r.h);
-}
-
-void
-krt_do_notify(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs)
-{
- int err = 0;
-
- /*
- * NULL for eattr of the old route is a little hack, but we don't
- * get proper eattrs for old in rt_notify() anyway. NULL means no
- * extended route attributes and therefore matches if the kernel
- * route has any of them.
- */
-
- if (old)
- nl_send_route(p, old, NULL, 0);
-
- if (new)
- err = nl_send_route(p, new, eattrs, 1);
-
- if (err < 0)
- n->n.flags |= KRF_SYNC_ERROR;
- else
- n->n.flags &= ~KRF_SYNC_ERROR;
-}
-
-
-#define SKIP(ARG...) do { DBG("KRT: Ignoring route - " ARG); return; } while(0)
-
-static void
-nl_parse_route(struct nlmsghdr *h, int scan)
-{
- struct krt_proto *p;
- struct rtmsg *i;
- struct rtattr *a[RTA_CACHEINFO+1];
- int new = h->nlmsg_type == RTM_NEWROUTE;
-
- ip_addr dst = IPA_NONE;
- u32 oif = ~0;
- int src;
-
- if (!(i = nl_checkin(h, sizeof(*i))) || !nl_parse_attrs(RTM_RTA(i), a, sizeof(a)))
- return;
- if (i->rtm_family != BIRD_AF)
- return;
- if ((a[RTA_DST] && RTA_PAYLOAD(a[RTA_DST]) != sizeof(ip_addr)) ||
-#ifdef IPV6
- (a[RTA_IIF] && RTA_PAYLOAD(a[RTA_IIF]) != 4) ||
-#endif
- (a[RTA_OIF] && RTA_PAYLOAD(a[RTA_OIF]) != 4) ||
- (a[RTA_GATEWAY] && RTA_PAYLOAD(a[RTA_GATEWAY]) != sizeof(ip_addr)) ||
- (a[RTA_PRIORITY] && RTA_PAYLOAD(a[RTA_PRIORITY]) != 4) ||
- (a[RTA_PREFSRC] && RTA_PAYLOAD(a[RTA_PREFSRC]) != sizeof(ip_addr)) ||
- (a[RTA_FLOW] && RTA_PAYLOAD(a[RTA_OIF]) != 4))
- {
- log(L_ERR "KRT: Malformed message received");
- return;
- }
-
- if (a[RTA_DST])
- {
- memcpy(&dst, RTA_DATA(a[RTA_DST]), sizeof(dst));
- ipa_ntoh(dst);
- }
-
- if (a[RTA_OIF])
- memcpy(&oif, RTA_DATA(a[RTA_OIF]), sizeof(oif));
-
- p = nl_table_map[i->rtm_table]; /* Do we know this table? */
- DBG("KRT: Got %I/%d, type=%d, oif=%d, table=%d, prid=%d, proto=%s\n", dst, i->rtm_dst_len, i->rtm_type, oif, i->rtm_table, i->rtm_protocol, p ? p->p.name : "(none)");
- if (!p)
- SKIP("unknown table %d\n", i->rtm_table);
-
-
-#ifdef IPV6
- if (a[RTA_IIF])
- SKIP("IIF set\n");
-#else
- if (i->rtm_tos != 0) /* We don't support TOS */
- SKIP("TOS %02x\n", i->rtm_tos);
-#endif
-
- if (scan && !new)
- SKIP("RTM_DELROUTE in scan\n");
-
- int c = ipa_classify_net(dst);
- if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
- SKIP("strange class/scope\n");
-
- // ignore rtm_scope, it is not a real scope
- // if (i->rtm_scope != RT_SCOPE_UNIVERSE)
- // SKIP("scope %u\n", i->rtm_scope);
-
- switch (i->rtm_protocol)
- {
- case RTPROT_UNSPEC:
- SKIP("proto unspec\n");
-
- case RTPROT_REDIRECT:
- src = KRT_SRC_REDIRECT;
- break;
-
- case RTPROT_KERNEL:
- src = KRT_SRC_KERNEL;
- return;
-
- case RTPROT_BIRD:
- if (!scan)
- SKIP("echo\n");
- src = KRT_SRC_BIRD;
- break;
-
- case RTPROT_BOOT:
- default:
- src = KRT_SRC_ALIEN;
- }
-
- net *net = net_get(p->p.table, dst, i->rtm_dst_len);
-
- rta ra = {
- .proto = &p->p,
- .source = RTS_INHERIT,
- .scope = SCOPE_UNIVERSE,
- .cast = RTC_UNICAST
- };
-
- switch (i->rtm_type)
- {
- case RTN_UNICAST:
-
- if (a[RTA_MULTIPATH])
- {
- ra.dest = RTD_MULTIPATH;
- ra.nexthops = nl_parse_multipath(p, a[RTA_MULTIPATH]);
- if (!ra.nexthops)
- {
- log(L_ERR "KRT: Received strange multipath route %I/%d",
- net->n.prefix, net->n.pxlen);
- return;
- }
-
- break;
- }
-
- ra.iface = if_find_by_index(oif);
- if (!ra.iface)
- {
- log(L_ERR "KRT: Received route %I/%d with unknown ifindex %u",
- net->n.prefix, net->n.pxlen, oif);
- return;
- }
-
- if (a[RTA_GATEWAY])
- {
- neighbor *ng;
- ra.dest = RTD_ROUTER;
- memcpy(&ra.gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ra.gw));
- ipa_ntoh(ra.gw);
-
- /* Silently skip strange 6to4 routes */
- if (ipa_in_net(ra.gw, IPA_NONE, 96))
- return;
-
- ng = neigh_find2(&p->p, &ra.gw, ra.iface,
- (i->rtm_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
- if (!ng || (ng->scope == SCOPE_HOST))
- {
- log(L_ERR "KRT: Received route %I/%d with strange next-hop %I",
- net->n.prefix, net->n.pxlen, ra.gw);
- return;
- }
- }
- else
- {
- ra.dest = RTD_DEVICE;
-
- /*
- * In Linux IPv6, 'native' device routes have proto
- * RTPROT_BOOT and not RTPROT_KERNEL (which they have in
- * IPv4 and which is expected). We cannot distinguish
- * 'native' and user defined device routes, so we ignore all
- * such device routes and for consistency, we have the same
- * behavior in IPv4. Anyway, users should use RTPROT_STATIC
- * for their 'alien' routes.
- */
-
- if (i->rtm_protocol == RTPROT_BOOT)
- src = KRT_SRC_KERNEL;
- }
-
- break;
- case RTN_BLACKHOLE:
- ra.dest = RTD_BLACKHOLE;
- break;
- case RTN_UNREACHABLE:
- ra.dest = RTD_UNREACHABLE;
- break;
- case RTN_PROHIBIT:
- ra.dest = RTD_PROHIBIT;
- break;
- /* FIXME: What about RTN_THROW? */
- default:
- SKIP("type %d\n", i->rtm_type);
- return;
- }
-
- rte *e = rte_get_temp(&ra);
- e->net = net;
- e->u.krt.src = src;
- e->u.krt.proto = i->rtm_protocol;
- e->u.krt.type = i->rtm_type;
-
- if (a[RTA_PRIORITY])
- memcpy(&e->u.krt.metric, RTA_DATA(a[RTA_PRIORITY]), sizeof(e->u.krt.metric));
- else
- e->u.krt.metric = 0;
-
- if (a[RTA_PREFSRC])
- {
- ip_addr ps;
- memcpy(&ps, RTA_DATA(a[RTA_PREFSRC]), sizeof(ps));
- ipa_ntoh(ps);
-
- ea_list *ea = alloca(sizeof(ea_list) + sizeof(eattr));
- ea->next = ra.eattrs;
- ra.eattrs = ea;
- ea->flags = EALF_SORTED;
- ea->count = 1;
- ea->attrs[0].id = EA_KRT_PREFSRC;
- ea->attrs[0].flags = 0;
- ea->attrs[0].type = EAF_TYPE_IP_ADDRESS;
- ea->attrs[0].u.ptr = alloca(sizeof(struct adata) + sizeof(ps));
- ea->attrs[0].u.ptr->length = sizeof(ps);
- memcpy(ea->attrs[0].u.ptr->data, &ps, sizeof(ps));
- }
-
- if (a[RTA_FLOW])
- {
- ea_list *ea = alloca(sizeof(ea_list) + sizeof(eattr));
- ea->next = ra.eattrs;
- ra.eattrs = ea;
- ea->flags = EALF_SORTED;
- ea->count = 1;
- ea->attrs[0].id = EA_KRT_REALM;
- ea->attrs[0].flags = 0;
- ea->attrs[0].type = EAF_TYPE_INT;
- memcpy(&ea->attrs[0].u.data, RTA_DATA(a[RTA_FLOW]), 4);
- }
-
- if (scan)
- krt_got_route(p, e);
- else
- krt_got_route_async(p, e, new);
-}
-
-void
-krt_do_scan(struct krt_proto *p UNUSED) /* CONFIG_ALL_TABLES_AT_ONCE => p is NULL */
-{
- struct nlmsghdr *h;
-
- nl_request_dump(RTM_GETROUTE);
- while (h = nl_get_scan())
- if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
- nl_parse_route(h, 1);
- else
- log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
-}
-
-/*
- * Asynchronous Netlink interface
- */
-
-static sock *nl_async_sk; /* BIRD socket for asynchronous notifications */
-static byte *nl_async_rx_buffer; /* Receive buffer */
-
-static void
-nl_async_msg(struct nlmsghdr *h)
-{
- switch (h->nlmsg_type)
- {
- case RTM_NEWROUTE:
- case RTM_DELROUTE:
- DBG("KRT: Received async route notification (%d)\n", h->nlmsg_type);
- nl_parse_route(h, 0);
- break;
- case RTM_NEWLINK:
- case RTM_DELLINK:
- DBG("KRT: Received async link notification (%d)\n", h->nlmsg_type);
- nl_parse_link(h, 0);
- break;
- case RTM_NEWADDR:
- case RTM_DELADDR:
- DBG("KRT: Received async address notification (%d)\n", h->nlmsg_type);
- nl_parse_addr(h);
- break;
- default:
- DBG("KRT: Received unknown async notification (%d)\n", h->nlmsg_type);
- }
-}
-
-static int
-nl_async_hook(sock *sk, int size UNUSED)
-{
- struct iovec iov = { nl_async_rx_buffer, NL_RX_SIZE };
- struct sockaddr_nl sa;
- struct msghdr m = { (struct sockaddr *) &sa, sizeof(sa), &iov, 1, NULL, 0, 0 };
- struct nlmsghdr *h;
- int x;
- unsigned int len;
-
- x = recvmsg(sk->fd, &m, 0);
- if (x < 0)
- {
- if (errno == ENOBUFS)
- {
- /*
- * Netlink reports some packets have been thrown away.
- * One day we might react to it by asking for route table
- * scan in near future.
- */
- return 1; /* More data are likely to be ready */
- }
- else if (errno != EWOULDBLOCK)
- log(L_ERR "Netlink recvmsg: %m");
- return 0;
- }
- if (sa.nl_pid) /* It isn't from the kernel */
- {
- DBG("Non-kernel packet\n");
- return 1;
- }
- h = (void *) nl_async_rx_buffer;
- len = x;
- if (m.msg_flags & MSG_TRUNC)
- {
- log(L_WARN "Netlink got truncated asynchronous message");
- return 1;
- }
- while (NLMSG_OK(h, len))
- {
- nl_async_msg(h);
- h = NLMSG_NEXT(h, len);
- }
- if (len)
- log(L_WARN "nl_async_hook: Found packet remnant of size %d", len);
- return 1;
-}
-
-static void
-nl_open_async(void)
-{
- sock *sk;
- struct sockaddr_nl sa;
- int fd;
- static int nl_open_tried = 0;
-
- if (nl_open_tried)
- return;
- nl_open_tried = 1;
-
- DBG("KRT: Opening async netlink socket\n");
-
- fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
- if (fd < 0)
- {
- log(L_ERR "Unable to open asynchronous rtnetlink socket: %m");
- return;
- }
-
- bzero(&sa, sizeof(sa));
- sa.nl_family = AF_NETLINK;
-#ifdef IPV6
- sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE;
-#else
- sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE;
-#endif
- if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0)
- {
- log(L_ERR "Unable to bind asynchronous rtnetlink socket: %m");
- return;
- }
-
- sk = nl_async_sk = sk_new(krt_pool);
- sk->type = SK_MAGIC;
- sk->rx_hook = nl_async_hook;
- sk->fd = fd;
- if (sk_open(sk))
- bug("Netlink: sk_open failed");
-
- if (!nl_async_rx_buffer)
- nl_async_rx_buffer = xmalloc(NL_RX_SIZE);
-}
-
-/*
- * Interface to the UNIX krt module
- */
-
-static u8 nl_cf_table[(NL_NUM_TABLES+7) / 8];
-
-void
-krt_sys_start(struct krt_proto *p, int first)
-{
- nl_table_map[KRT_CF->sys.table_id] = p;
- if (first)
- {
- nl_open();
- nl_open_async();
- }
-}
-
-void
-krt_sys_shutdown(struct krt_proto *p UNUSED, int last UNUSED)
-{
-}
-
-int
-krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n, struct krt_config *o)
-{
- return n->sys.table_id == o->sys.table_id;
-}
-
-
-void
-krt_sys_preconfig(struct config *c UNUSED)
-{
- bzero(&nl_cf_table, sizeof(nl_cf_table));
-}
-
-void
-krt_sys_postconfig(struct krt_config *x)
-{
- int id = x->sys.table_id;
-
- if (nl_cf_table[id/8] & (1 << (id%8)))
- cf_error("Multiple kernel syncers defined for table #%d", id);
- nl_cf_table[id/8] |= (1 << (id%8));
-}
-
-void
-krt_sys_init_config(struct krt_config *cf)
-{
- cf->sys.table_id = RT_TABLE_MAIN;
-}
-
-void
-krt_sys_copy_config(struct krt_config *d, struct krt_config *s)
-{
- d->sys.table_id = s->sys.table_id;
-}
-
-
-
-void
-kif_sys_start(struct kif_proto *p UNUSED)
-{
- nl_open();
- nl_open_async();
-}
-
-void
-kif_sys_shutdown(struct kif_proto *p UNUSED)
-{
-}
ipa_ntoh(*a);
}
-/*
- * Multicasting in Linux systems is a real mess. Not only different kernels
- * have different interfaces, but also different libc's export it in different
- * ways. Horrible.
- */
-
-
-#if defined(CONFIG_LINUX_MC_MREQ) || defined(CONFIG_LINUX_MC_MREQ_BIND)
-/*
- * Older kernels support only struct mreq which matches interfaces by their
- * addresses and thus fails on unnumbered devices. On newer 2.0 kernels
- * we can use SO_BINDTODEVICE to circumvent this problem.
- */
-
-#define MREQ_IFA struct in_addr
-#define MREQ_GRP struct ip_mreq
-static inline void fill_mreq_ifa(struct in_addr *m, struct iface *ifa UNUSED, ip_addr saddr, ip_addr maddr UNUSED)
-{
- set_inaddr(m, saddr);
-}
-
-static inline void fill_mreq_grp(struct ip_mreq *m, struct iface *ifa, ip_addr saddr, ip_addr maddr)
-{
- bzero(m, sizeof(*m));
-#ifdef CONFIG_LINUX_MC_MREQ_BIND
- m->imr_interface.s_addr = INADDR_ANY;
-#else
- set_inaddr(&m->imr_interface, saddr);
-#endif
- set_inaddr(&m->imr_multiaddr, maddr);
-}
-#endif
-
-
-#ifdef CONFIG_LINUX_MC_MREQN
-/*
- * 2.1 and newer kernels use struct mreqn which passes ifindex, so no
- * problems with unnumbered devices.
- */
#ifndef HAVE_STRUCT_IP_MREQN
/* Several versions of glibc don't define this structure, so we have to do it ourselves */
};
#endif
-#define MREQ_IFA struct ip_mreqn
-#define MREQ_GRP struct ip_mreqn
-#define fill_mreq_ifa fill_mreq
-#define fill_mreq_grp fill_mreq
-static inline void fill_mreq(struct ip_mreqn *m, struct iface *ifa, ip_addr saddr, ip_addr maddr)
+static inline void fill_mreqn(struct ip_mreqn *m, struct iface *ifa, ip_addr saddr, ip_addr maddr)
{
bzero(m, sizeof(*m));
m->imr_ifindex = ifa->index;
set_inaddr(&m->imr_address, saddr);
set_inaddr(&m->imr_multiaddr, maddr);
}
-#endif
static inline char *
sysio_setup_multicast(sock *s)
{
- MREQ_IFA m;
+ struct ip_mreqn m;
int zero = 0;
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
return "IP_MULTICAST_TTL";
/* This defines where should we send _outgoing_ multicasts */
- fill_mreq_ifa(&m, s->iface, s->saddr, IPA_NONE);
+ fill_mreqn(&m, s->iface, s->saddr, IPA_NONE);
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0)
return "IP_MULTICAST_IF";
-#if defined(CONFIG_LINUX_MC_MREQ_BIND) || defined(CONFIG_LINUX_MC_MREQN)
- {
- struct ifreq ifr;
- strcpy(ifr.ifr_name, s->iface->name);
- if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
- return "SO_BINDTODEVICE";
- }
-#endif
+ /* Is this necessary? */
+ struct ifreq ifr;
+ strcpy(ifr.ifr_name, s->iface->name);
+ if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
+ return "SO_BINDTODEVICE";
return NULL;
}
static inline char *
sysio_join_group(sock *s, ip_addr maddr)
{
- MREQ_GRP m;
+ struct ip_mreqn m;
/* And this one sets interface for _receiving_ multicasts from */
- fill_mreq_grp(&m, s->iface, s->saddr, maddr);
+ fill_mreqn(&m, s->iface, s->saddr, maddr);
if (setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_ADD_MEMBERSHIP";
static inline char *
sysio_leave_group(sock *s, ip_addr maddr)
{
- MREQ_GRP m;
+ struct ip_mreqn m;
/* And this one sets interface for _receiving_ multicasts from */
- fill_mreq_grp(&m, s->iface, s->saddr, maddr);
+ fill_mreqn(&m, s->iface, s->saddr, maddr);
if (setsockopt(s->fd, SOL_IP, IP_DROP_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_DROP_MEMBERSHIP";
krt.c
krt.h
krt.Y
-
-#ifdef CONFIG_UNIX_IFACE
-krt-iface.c
-krt-iface.h
-#endif
-
-#ifdef CONFIG_UNIX_SET
-krt-set.c
-krt-set.h
-#endif
sk_join_group(sock *s, ip_addr maddr)
{
struct ipv6_mreq mreq;
-
+
set_inaddr(&mreq.ipv6mr_multiaddr, maddr);
#ifdef CONFIG_IPV6_GLIBC_20
+++ /dev/null
-/*
- * BIRD -- Unix Interface Scanning and Syncing
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- * (c) 2004 Ondrej Filip <feela@network.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-#include <errno.h>
-
-#undef LOCAL_DEBUG
-
-#include "nest/bird.h"
-#include "nest/iface.h"
-#include "nest/route.h"
-#include "nest/protocol.h"
-#include "lib/timer.h"
-#include "lib/krt.h"
-#include "lib/string.h"
-
-#include "unix.h"
-
-int if_scan_sock = -1;
-
-static void
-scan_ifs(struct ifreq *r, int cnt)
-{
- struct iface i, *pi;
- struct ifa a;
- char *err, *colon;
- unsigned fl;
- ip_addr netmask;
- int l, scope;
- sockaddr *sa;
-
- if_start_update();
- for (cnt /= sizeof(struct ifreq); cnt; cnt--, r++)
- {
- int sec = 0;
- bzero(&i, sizeof(i));
- bzero(&a, sizeof(a));
- if (colon = strchr(r->ifr_name, ':'))
- {
- /* It's an alias -- let's interpret it as a secondary interface address */
- sec = 1;
- *colon = 0;
- }
- strncpy(i.name, r->ifr_name, sizeof(i.name) - 1);
-
- if(ioctl(if_scan_sock, SIOCGIFADDR,r)<0) continue;
-
- get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &a.ip, NULL, 1);
- if (ipa_nonzero(a.ip))
- {
- l = ipa_classify(a.ip);
- if (l < 0 || !(l & IADDR_HOST))
- {
- log(L_ERR "%s: Invalid interface address", i.name);
- a.ip = IPA_NONE;
- }
- else
- {
- a.scope = l & IADDR_SCOPE_MASK;
- if (a.scope == SCOPE_HOST)
- i.flags |= IF_LOOPBACK | IF_IGNORE;
- }
- }
-
- if (ioctl(if_scan_sock, SIOCGIFFLAGS, r) < 0)
- {
- err = "SIOCGIFFLAGS";
- faulty:
- log(L_ERR "%s(%s): %m", err, i.name);
- bad:
- i.flags = (i.flags & ~IF_ADMIN_UP) | IF_SHUTDOWN;
- continue;
- }
- fl = r->ifr_flags;
- if (fl & IFF_UP)
- i.flags |= IF_ADMIN_UP;
-
- if (ioctl(if_scan_sock, SIOCGIFNETMASK, r) < 0)
- { err = "SIOCGIFNETMASK"; goto faulty; }
- get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &netmask, NULL, 0);
- l = ipa_mklen(netmask);
- if (l < 0)
- {
- log(L_ERR "%s: Invalid netmask (%x)", i.name, netmask);
- goto bad;
- }
- a.pxlen = l;
-
- if (fl & IFF_POINTOPOINT)
- {
- a.flags |= IA_PEER;
- if (ioctl(if_scan_sock, SIOCGIFDSTADDR, r) < 0)
- { err = "SIOCGIFDSTADDR"; goto faulty; }
- get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &a.opposite, NULL, 1);
- a.prefix = a.opposite;
- a.pxlen = BITS_PER_IP_ADDRESS;
- }
- else
- a.prefix = ipa_and(a.ip, ipa_mkmask(a.pxlen));
- if (fl & IFF_LOOPBACK)
- i.flags |= IF_LOOPBACK | IF_IGNORE;
- if (1
-#ifndef CONFIG_ALL_MULTICAST
- && (fl & IFF_MULTICAST)
-#endif
-#ifndef CONFIG_UNNUM_MULTICAST
- && !(a.flags & IA_PEER)
-#endif
- )
- i.flags |= IF_MULTICAST;
-
- scope = ipa_classify(a.ip);
- if (scope < 0)
- {
- log(L_ERR "%s: Invalid address", i.name);
- goto bad;
- }
- a.scope = scope & IADDR_SCOPE_MASK;
-
- if (a.pxlen < 32)
- {
- a.brd = ipa_or(a.prefix, ipa_not(ipa_mkmask(a.pxlen)));
- if (ipa_equal(a.ip, a.prefix) || ipa_equal(a.ip, a.brd))
- {
- log(L_ERR "%s: Using network or broadcast address for interface", i.name);
- goto bad;
- }
- if (fl & IFF_BROADCAST)
- i.flags |= IF_BROADCAST;
- if (a.pxlen < 30)
- i.flags |= IF_MULTIACCESS;
- if (a.pxlen == 30)
- ifa.opposite = ipa_opposite_m2(ifa.ip);
- if (a.pxlen == 31)
- ifa.opposite = ipa_opposite_m1(ifa.ip);
- }
- else
- a.brd = a.opposite;
- a.scope = SCOPE_UNIVERSE;
-
- if (ioctl(if_scan_sock, SIOCGIFMTU, r) < 0)
- { err = "SIOCGIFMTU"; goto faulty; }
- i.mtu = r->ifr_mtu;
-
-#ifdef SIOCGIFINDEX
- if (ioctl(if_scan_sock, SIOCGIFINDEX, r) >= 0)
- i.index = r->ifr_ifindex;
- else if (errno != EINVAL)
- DBG("SIOCGIFINDEX failed: %m\n");
- else /* defined, but not supported by the kernel */
-#endif
- /*
- * The kernel doesn't give us real ifindices, but we still need them
- * at least for OSPF unnumbered links. So let's make them up ourselves.
- */
- if (pi = if_find_by_name(i.name))
- i.index = pi->index;
- else
- {
- static int if_index_counter = 1;
- i.index = if_index_counter++;
- }
-
- pi = NULL;
- if (sec)
- {
- a.flags |= IA_SECONDARY;
- pi = if_find_by_index(i.index);
- }
- if (!pi)
- pi = if_update(&i);
- a.iface = pi;
- ifa_update(&a);
- }
- if_end_update();
-}
-
-void
-kif_do_scan(struct kif_proto *p)
-{
- struct ifconf ic;
- static int last_ifbuf_size = 4*sizeof(struct ifreq);
- int res;
-
- for(;;)
- {
- ic.ifc_buf = alloca(last_ifbuf_size);
- ic.ifc_len = last_ifbuf_size;
- res = ioctl(if_scan_sock, SIOCGIFCONF, &ic);
- if (res < 0 && errno != EFAULT)
- die("SIOCCGIFCONF: %m");
- if (res >= 0 && ic.ifc_len <= last_ifbuf_size)
- break;
- last_ifbuf_size *= 2;
- DBG("Increased ifconf buffer size to %d\n", last_ifbuf_size);
- }
- scan_ifs(ic.ifc_req, ic.ifc_len);
-}
-
-void
-kif_start(struct kif_proto *p)
-{
-}
-
-void
-kif_shutdown(struct kif_proto *p)
-{
-}
-
-void
-kif_io_init(void)
-{
- if_scan_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
- DBG("Using socket %d for interface and route scanning\n", if_scan_sock);
- if (if_scan_sock < 0)
- die("Cannot create scanning socket: %m");
-}
-
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Interface Syncer
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_IFACE_H_
-#define _BIRD_KRT_IFACE_H_
-
-struct kif_params {
-};
-
-struct kif_status {
-};
-
-extern int if_scan_sock;
-
-
-static inline void kif_sys_init(struct kif_proto *p UNUSED) { }
-static inline int kif_sys_reconfigure(struct kif_proto *p UNUSED, struct kif_config *n UNUSED, struct kif_config *o UNUSED) { return 1; }
-
-static inline void kif_sys_preconfig(struct config *c UNUSED) { }
-static inline void kif_sys_postconfig(struct kif_config *c UNUSED) { }
-static inline void kif_sys_init_config(struct kif_config *c UNUSED) { }
-static inline void kif_sys_copy_config(struct kif_config *d UNUSED, struct kif_config *s UNUSED) { }
-
-#endif
+++ /dev/null
-/*
- * BIRD -- Unix Routing Table Syncing
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <sys/ioctl.h>
-#include <net/route.h>
-
-#undef LOCAL_DEBUG
-
-#include "nest/bird.h"
-#include "nest/iface.h"
-#include "nest/route.h"
-#include "nest/protocol.h"
-#include "lib/unix.h"
-#include "lib/krt.h"
-#include "lib/string.h"
-
-int
-krt_capable(rte *e)
-{
- rta *a = e->attrs;
-
-#ifdef CONFIG_AUTO_ROUTES
- if (a->source == RTS_DEVICE)
- return 0;
-#endif
- return
- a->cast == RTC_UNICAST &&
- (a->dest == RTD_ROUTER
- || a->dest == RTD_DEVICE
-#ifdef RTF_REJECT
- || a->dest == RTD_UNREACHABLE
-#endif
- );
-}
-
-static void
-krt_ioctl(int ioc, rte *e, char *name)
-{
- net *net = e->net;
- struct rtentry re;
- rta *a = e->attrs;
-
- bzero(&re, sizeof(re));
- fill_in_sockaddr((struct sockaddr_in *) &re.rt_dst, net->n.prefix, 0);
- fill_in_sockaddr((struct sockaddr_in *) &re.rt_genmask, ipa_mkmask(net->n.pxlen), 0);
- re.rt_flags = RTF_UP;
- if (net->n.pxlen == 32)
- re.rt_flags |= RTF_HOST;
- switch (a->dest)
- {
- case RTD_ROUTER:
- fill_in_sockaddr((struct sockaddr_in *) &re.rt_gateway, a->gw, 0);
- re.rt_flags |= RTF_GATEWAY;
- break;
- case RTD_DEVICE:
- if (!a->iface)
- return;
- re.rt_dev = a->iface->name;
- break;
-#ifdef RTF_REJECT
- case RTD_UNREACHABLE:
- re.rt_flags |= RTF_REJECT;
- break;
-#endif
- default:
- bug("krt set: unknown flags, but not filtered");
- }
-
- if (ioctl(if_scan_sock, ioc, &re) < 0)
- log(L_ERR "%s(%I/%d): %m", name, net->n.prefix, net->n.pxlen);
-}
-
-void
-krt_do_notify(struct krt_proto *p, net *net, rte *new, rte *old)
-{
- if (old)
- {
- DBG("krt_remove_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
- krt_ioctl(SIOCDELRT, old, "SIOCDELRT");
- }
- if (new)
- {
- DBG("krt_add_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
- krt_ioctl(SIOCADDRT, new, "SIOCADDRT");
- }
-}
-
-void
-krt_sys_start(struct krt_proto *x, int first)
-{
- if (if_scan_sock < 0)
- bug("krt set: missing socket");
-}
-
-void
-krt_sys_shutdown(struct krt_proto *x, int last)
-{
-}
-
-void
-krt_sys_construct(struct krt_config *c)
-{
-}
-
+++ /dev/null
-/*
- * BIRD -- Unix Kernel Route Syncer
- *
- * (c) 1998--2000 Martin Mares <mj@ucw.cz>
- *
- * Can be freely distributed and used under the terms of the GNU GPL.
- */
-
-#ifndef _BIRD_KRT_SET_H_
-#define _BIRD_KRT_SET_H_
-
-struct krt_params {
-};
-
-struct krt_status {
-};
-
-
-static inline void krt_sys_init(struct krt_proto *p UNUSED) { }
-static inline int krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n UNUSED, struct krt_config *o UNUSED) { return 1; }
-
-static inline void krt_sys_preconfig(struct config *c UNUSED) { }
-static inline void krt_sys_postconfig(struct krt_config *c UNUSED) { }
-static inline void krt_sys_init_config(struct krt_config *c UNUSED) { }
-static inline void krt_sys_copy_config(struct krt_config *d UNUSED, struct krt_config *s UNUSED) { }
-
-#endif
* Either with a single routing table and single KRT protocol [traditional UNIX]
* or with many routing tables and separate KRT protocols for all of them
* or with many routing tables, but every scan including all tables, so we start
- * separate KRT protocols which cooperate with each other [Linux 2.2].
+ * separate KRT protocols which cooperate with each other [Linux].
* In this case, we keep only a single scan timer.
*
* We use FIB node flags in the routing table to keep track of route
* When starting up, we cheat by looking if there is another
* KRT instance to be initialized later and performing table scan
* only once for all the instances.
+ *
+ * The code uses OS-dependent parts for kernel updates and scans. These parts are
+ * in more specific sysdep directories (e.g. sysdep/linux) in functions krt_sys_*
+ * and kif_sys_* (and some others like krt_do_notify()) and krt-sys.h header file.
+ * This is also used for platform specific protocol options and route attributes.
+ *
+ * There was also an old code that used traditional UNIX ioctls for these tasks.
+ * It was unmaintained and later removed. For reference, see sysdep/krt-* files
+ * in commit 396dfa9042305f62da1f56589c4b98fac57fc2f6
*/
/*
{
krt_pool = rp_new(&root_pool, "Kernel Syncer");
krt_filter_lp = lp_new(krt_pool, 4080);
- kif_sys_io_init();
}
/*
struct kif_config;
struct kif_proto;
-#include "lib/krt-scan.h"
-#include "lib/krt-set.h"
-#include "lib/krt-iface.h"
+#include "lib/krt-sys.h"
/* Flags stored in net->n.flags, rest are in nest/route.h */
struct proto_config * krt_init_config(int class);
-/* krt-scan.c */
+/* krt sysdep */
void krt_sys_init(struct krt_proto *);
void krt_sys_start(struct krt_proto *, int);
void krt_do_notify(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs);
-/* krt-iface.c */
+/* kif sysdep */
void kif_sys_init(struct kif_proto *);
void kif_sys_start(struct kif_proto *);
void kif_do_scan(struct kif_proto *);
-// void kif_sys_io_init(void);
#endif
projects / thirdparty / bird.git / commitdiff
