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Cleanup in sysdep KRT code, part 2.

Browse Source 
Remove support for historic Linux kernels,
merge krt-iface, krt-set and krt-scan stub headers.
This commit is contained in:
Ondrej Zajicek 2012-04-30 22:21:52 +02:00
parent 396dfa9042
commit f1aceff59b
33 changed files with 38 additions and 2224 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
aclocal.m4 vendored
View File

@ -133,23 +133,6 @@ if test "$bird_cv_struct_ip_mreqn" = yes ; then
fi fi
]) ])
AC_DEFUN(BIRD_CHECK_LINUX_VERSION,
[AC_CACHE_CHECK([Linux kernel version], bird_cv_sys_linux_version, [
AC_REQUIRE_CPP()dnl
cat > conftest.$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_DEFUN(BIRD_CHECK_GCC_OPTIONS,
[AC_CACHE_VAL(bird_cv_c_option_no_pointer_sign, [ [AC_CACHE_VAL(bird_cv_c_option_no_pointer_sign, [
cat >conftest.c <<EOF cat >conftest.c <<EOF

14
configure.in
View File

@ -105,19 +105,11 @@ elif test -f sysconfig.h ; then
sysdesc=sysconfig sysdesc=sysconfig
else else
case "$ip:$host_os" in case "$ip:$host_os" in
ipv4:linux*) BIRD_CHECK_LINUX_VERSION ipv6:linux*) sysdesc=linux-v6
default_iproutedir="/etc/iproute2" 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" default_iproutedir="/etc/iproute2"
case $bird_cv_sys_linux_version in
1.*|2.0.*) AC_MSG_ERROR([This version of Linux doesn't support IPv6.]) ;;
*) sysdesc=linux-v6 ;;
esac
;; ;;
ipv6:netbsd*) sysdesc=bsd-v6 ipv6:netbsd*) sysdesc=bsd-v6
CPPFLAGS="$CPPFLAGS -I/usr/pkg/include" CPPFLAGS="$CPPFLAGS -I/usr/pkg/include"
@ -180,7 +172,7 @@ AC_MSG_RESULT(ok)
AC_SUBST(protocols) AC_SUBST(protocols)
case $sysdesc in 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.])],[ AC_CHECK_HEADER(linux/rtnetlink.h,,[AC_MSG_ERROR([Appropriate version of Linux kernel headers not found.])],[
#include <asm/types.h> #include <asm/types.h>
#include <sys/socket.h> #include <sys/socket.h>

1
nest/a-path.c
View File

@ -15,7 +15,6 @@
#include "lib/string.h" #include "lib/string.h"
#include "filter/filter.h" #include "filter/filter.h"
// static inline void put_as(byte *data, u32 as) { put_u32(data, as); } // static inline void put_as(byte *data, u32 as) { put_u32(data, as); }
// static inline u32 get_as(byte *data) { return get_u32(data); } // static inline u32 get_as(byte *data) { return get_u32(data); }

7
sysdep/bsd/Modules
View File

@ -1,6 +1,3 @@
krt-scan.h
krt-iface.h
sysio.h
krt-set.h
krt-sock.c krt-sock.c
krt-sock.h krt-sys.h
sysio.h

33
sysdep/bsd/krt-iface.h
View File

@ -1,33 +0,0 @@
/*
* 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

30
sysdep/bsd/krt-scan.h
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@ -1,30 +0,0 @@
/*
* 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

17
sysdep/bsd/krt-set.h
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@ -1,17 +0,0 @@
/*
* 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

23
sysdep/bsd/krt-sock.h
View File

@ -1,23 +0,0 @@
/*
* 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

16
sysdep/cf/README
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@ -5,19 +5,9 @@ CONFIG_AUTO_ROUTES Device routes are added automagically by the kernel
CONFIG_SELF_CONSCIOUS We're able to recognize whether route was installed by us CONFIG_SELF_CONSCIOUS We're able to recognize whether route was installed by us
CONFIG_MULTIPLE_TABLES The kernel supports multiple routing tables CONFIG_MULTIPLE_TABLES The kernel supports multiple routing tables
CONFIG_ALL_TABLES_AT_ONCE Kernel scanner wants to process all tables at once 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_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_SKIP_MC_BIND Don't call bind on multicast socket (def for *BSD) CONFIG_SKIP_MC_BIND Don't call bind on multicast socket (def for *BSD)
CONFIG_LINUX_SCAN Use Linux /proc/net/route scanner CONFIG_UNIX_DONTROUTE Use setsockopts DONTROUTE (undef for *BSD)
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_RESTRICTED_PRIVILEGES Implements restricted privileges using drop_uid()

6
sysdep/cf/bsd-v6.h
View File

@ -10,14 +10,8 @@
#define CONFIG_AUTO_ROUTES #define CONFIG_AUTO_ROUTES
#define CONFIG_SELF_CONSCIOUS #define CONFIG_SELF_CONSCIOUS
#undef CONFIG_MULTIPLE_TABLES
#undef CONFIG_UNIX_IFACE
#undef CONFIG_UNIX_SET
#define CONFIG_SKIP_MC_BIND #define CONFIG_SKIP_MC_BIND
#define CONFIG_ALL_MULTICAST
#define CONFIG_UNNUM_MULTICAST
/* /*
Link: sysdep/unix Link: sysdep/unix

7
sysdep/cf/bsd.h
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@ -8,15 +8,8 @@
#define CONFIG_AUTO_ROUTES #define CONFIG_AUTO_ROUTES
#define CONFIG_SELF_CONSCIOUS #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_SKIP_MC_BIND
#define CONFIG_ALL_MULTICAST
#define CONFIG_UNNUM_MULTICAST
/* /*
Link: sysdep/unix Link: sysdep/unix

26
sysdep/cf/linux-20.h
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@ -1,26 +0,0 @@
/*
* 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
*/

26
sysdep/cf/linux-21.h
View File

@ -1,26 +0,0 @@
/*
* 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
*/

26
sysdep/cf/linux-22.h
View File

@ -1,26 +0,0 @@
/*
* 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
*/

9
sysdep/cf/linux-v6.h
View File

@ -1,5 +1,5 @@
/* /*
* Configuration for Linux 2.2 based systems running IPv6 * Configuration for Linux based systems running IPv6
* *
* (c) 1998--1999 Martin Mares <mj@ucw.cz> * (c) 1998--1999 Martin Mares <mj@ucw.cz>
* *
@ -9,20 +9,13 @@
#define IPV6 #define IPV6
#define CONFIG_AUTO_ROUTES #define CONFIG_AUTO_ROUTES
#define CONFIG_ALL_MULTICAST
#define CONFIG_SELF_CONSCIOUS #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_MULTIPLE_TABLES
#define CONFIG_ALL_TABLES_AT_ONCE #define CONFIG_ALL_TABLES_AT_ONCE
#define CONFIG_RESTRICTED_PRIVILEGES #define CONFIG_RESTRICTED_PRIVILEGES
/* /*
Link: sysdep/linux/netlink
Link: sysdep/linux Link: sysdep/linux
Link: sysdep/unix Link: sysdep/unix
*/ */

7
sysdep/linux/Modules
View File

@ -1,6 +1,5 @@
#ifdef CONFIG_LINUX_SCAN krt-sys.h
krt-scan.c netlink.c
krt-scan.h netlink.Y
#endif
sysio.h sysio.h
syspriv.h syspriv.h

199
sysdep/linux/krt-scan.c
View File

@ -1,199 +0,0 @@
/*
* 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)
{
}

21
sysdep/linux/krt-scan.h
View File

@ -1,21 +0,0 @@
/*
* 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

5
sysdep/linux/netlink/Modules
View File

@ -1,5 +0,0 @@
krt-iface.h
krt-set.h
krt-scan.h
netlink.c
netlink.Y

33
sysdep/linux/netlink/krt-iface.h
View File

@ -1,33 +0,0 @@
/*
* 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

30
sysdep/linux/netlink/krt-scan.h
View File

@ -1,30 +0,0 @@
/*
* 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

28
sysdep/linux/netlink/krt-set.h
View File

@ -1,28 +0,0 @@
/*
* 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

32
sysdep/linux/netlink/netlink.Y
View File

@ -1,32 +0,0 @@
/*
* 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

1149
sysdep/linux/netlink/netlink.c
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File diff suppressed because it is too large Load Diff

63
sysdep/linux/sysio.h
View File

@ -57,45 +57,6 @@ get_inaddr(ip_addr *a, struct in_addr *ia)
ipa_ntoh(*a); 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 #ifndef HAVE_STRUCT_IP_MREQN
/* Several versions of glibc don't define this structure, so we have to do it ourselves */ /* Several versions of glibc don't define this structure, so we have to do it ourselves */
@ -107,24 +68,19 @@ struct ip_mreqn
}; };
#endif #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)); bzero(m, sizeof(*m));
m->imr_ifindex = ifa->index; m->imr_ifindex = ifa->index;
set_inaddr(&m->imr_address, saddr); set_inaddr(&m->imr_address, saddr);
set_inaddr(&m->imr_multiaddr, maddr); set_inaddr(&m->imr_multiaddr, maddr);
} }
#endif
static inline char * static inline char *
sysio_setup_multicast(sock *s) sysio_setup_multicast(sock *s)
{ {
MREQ_IFA m; struct ip_mreqn m;
int zero = 0; int zero = 0;
if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0) if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_LOOP, &zero, sizeof(zero)) < 0)
@ -134,18 +90,15 @@ sysio_setup_multicast(sock *s)
return "IP_MULTICAST_TTL"; return "IP_MULTICAST_TTL";
/* This defines where should we send _outgoing_ multicasts */ /* 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) if (setsockopt(s->fd, SOL_IP, IP_MULTICAST_IF, &m, sizeof(m)) < 0)
return "IP_MULTICAST_IF"; return "IP_MULTICAST_IF";
#if defined(CONFIG_LINUX_MC_MREQ_BIND) || defined(CONFIG_LINUX_MC_MREQN) /* Is this necessary? */
{
struct ifreq ifr; struct ifreq ifr;
strcpy(ifr.ifr_name, s->iface->name); strcpy(ifr.ifr_name, s->iface->name);
if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) if (setsockopt(s->fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0)
return "SO_BINDTODEVICE"; return "SO_BINDTODEVICE";
}
#endif
return NULL; return NULL;
} }
@ -153,10 +106,10 @@ sysio_setup_multicast(sock *s)
static inline char * static inline char *
sysio_join_group(sock *s, ip_addr maddr) sysio_join_group(sock *s, ip_addr maddr)
{ {
MREQ_GRP m; struct ip_mreqn m;
/* And this one sets interface for _receiving_ multicasts from */ /* 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) if (setsockopt(s->fd, SOL_IP, IP_ADD_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_ADD_MEMBERSHIP"; return "IP_ADD_MEMBERSHIP";
@ -166,10 +119,10 @@ sysio_join_group(sock *s, ip_addr maddr)
static inline char * static inline char *
sysio_leave_group(sock *s, ip_addr maddr) sysio_leave_group(sock *s, ip_addr maddr)
{ {
MREQ_GRP m; struct ip_mreqn m;
/* And this one sets interface for _receiving_ multicasts from */ /* 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) if (setsockopt(s->fd, SOL_IP, IP_DROP_MEMBERSHIP, &m, sizeof(m)) < 0)
return "IP_DROP_MEMBERSHIP"; return "IP_DROP_MEMBERSHIP";

10
sysdep/unix/Modules
View File

@ -10,13 +10,3 @@ random.c
krt.c krt.c
krt.h krt.h
krt.Y krt.Y
#ifdef CONFIG_UNIX_IFACE
krt-iface.c
krt-iface.h
#endif
#ifdef CONFIG_UNIX_SET
krt-set.c
krt-set.h
#endif

228
sysdep/unix/krt-iface.c
View File

@ -1,228 +0,0 @@
/*
* 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");
}

29
sysdep/unix/krt-iface.h
View File

@ -1,29 +0,0 @@
/*
* 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

112
sysdep/unix/krt-set.c
View File

@ -1,112 +0,0 @@
/*
* 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)
{
}

27
sysdep/unix/krt-set.h
View File

@ -1,27 +0,0 @@
/*
* 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

12
sysdep/unix/krt.c
View File

@ -23,7 +23,7 @@
* Either with a single routing table and single KRT protocol [traditional UNIX] * 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 and separate KRT protocols for all of them
* or with many routing tables, but every scan including all tables, so we start * 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. * In this case, we keep only a single scan timer.
* *
* We use FIB node flags in the routing table to keep track of route * We use FIB node flags in the routing table to keep track of route
@ -34,6 +34,15 @@
* When starting up, we cheat by looking if there is another * When starting up, we cheat by looking if there is another
* KRT instance to be initialized later and performing table scan * KRT instance to be initialized later and performing table scan
* only once for all the instances. * 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
*/ */
/* /*
@ -66,7 +75,6 @@ krt_io_init(void)
{ {
krt_pool = rp_new(&root_pool, "Kernel Syncer"); krt_pool = rp_new(&root_pool, "Kernel Syncer");
krt_filter_lp = lp_new(krt_pool, 4080); krt_filter_lp = lp_new(krt_pool, 4080);
kif_sys_io_init();
} }
/* /*

9
sysdep/unix/krt.h
View File

@ -15,9 +15,7 @@ struct krt_proto;
struct kif_config; struct kif_config;
struct kif_proto; struct kif_proto;
#include "lib/krt-scan.h" #include "lib/krt-sys.h"
#include "lib/krt-set.h"
#include "lib/krt-iface.h"
/* Flags stored in net->n.flags, rest are in nest/route.h */ /* Flags stored in net->n.flags, rest are in nest/route.h */
@ -113,7 +111,7 @@ struct kif_proto {
struct proto_config * krt_init_config(int class); struct proto_config * krt_init_config(int class);
/* krt-scan.c */ /* krt sysdep */
void krt_sys_init(struct krt_proto *); void krt_sys_init(struct krt_proto *);
void krt_sys_start(struct krt_proto *, int); void krt_sys_start(struct krt_proto *, int);
@ -130,7 +128,7 @@ void krt_do_scan(struct krt_proto *);
void krt_do_notify(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs); 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_init(struct kif_proto *);
void kif_sys_start(struct kif_proto *); void kif_sys_start(struct kif_proto *);
@ -142,6 +140,5 @@ void kif_sys_copy_config(struct kif_config *, struct kif_config *);
void kif_do_scan(struct kif_proto *); void kif_do_scan(struct kif_proto *);
// void kif_sys_io_init(void);
#endif #endif