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I rewrote the interface handling code, so that it supports multiple

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addresses per interface (needed for example for IPv6 support).

Visible changes:

o  struct iface now contains a list of all interface addresses (represented
   by struct ifa), iface->addr points to the primary address (if any).
o  Interface has IF_UP set iff it's up and it has a primary address.
o  IF_UP is now independent on IF_IGNORED (i.e., you need to test IF_IGNORED
   in the protocols; I've added this, but please check).
o  The if_notify_change hook has been simplified (only one interface pointer
   etc.).
o  Introduced a ifa_notify_change hook. (For now, only the Direct protocol
   does use it -- it's wise to just listen to device routes in all other
   protocols.)
o  Removed IF_CHANGE_FLAGS notifier flag (it was meaningless anyway).
o  Updated all the code except netlink (I'll look at it tomorrow) to match
   the new semantics (please look at your code to ensure I did it right).

Things to fix:

o  Netlink.
o  Make krt-iface interpret "eth0:1"-type aliases as secondary addresses.
This commit is contained in:
Martin Mares 1999-05-06 21:38:11 +00:00
parent ec8b579e9c
commit 9a158361da
11 changed files with 368 additions and 168 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
TODO
View file

@ -27,6 +27,8 @@ Core
- iface: we always need ifindex at least for PtP links (OSPF) - iface: we always need ifindex at least for PtP links (OSPF)
- iface: interface filters should support filtering by IP address as well - iface: interface filters should support filtering by IP address as well
- socket: Use IP_RECVERR for BGP TCP sockets?
Cleanup Cleanup
~~~~~~~ ~~~~~~~
- right usage of DBG vs. debug - right usage of DBG vs. debug

333
nest/iface.c
View file

@ -31,18 +31,23 @@ static list neigh_list;
static int static int
if_connected(ip_addr *a, struct iface *i) /* -1=error, 1=match, 0=no match */ if_connected(ip_addr *a, struct iface *i) /* -1=error, 1=match, 0=no match */
{ {
struct ifa *b;
if (!(i->flags & IF_UP)) if (!(i->flags & IF_UP))
return 0; return 0;
if ((i->flags & IF_UNNUMBERED) && ipa_equal(*a, i->opposite)) if ((i->flags & IF_UNNUMBERED) && ipa_equal(*a, i->addr->opposite))
return 1; return 1;
if (!ipa_in_net(*a, i->prefix, i->pxlen)) WALK_LIST(b, i->addrs)
return 0; if (ipa_in_net(*a, b->prefix, b->pxlen))
if (ipa_equal(*a, i->prefix) || /* Network address */ {
ipa_equal(*a, i->brd) || /* Broadcast */ if (ipa_equal(*a, b->prefix) || /* Network address */
ipa_equal(*a, i->ip)) /* Our own address */ ipa_equal(*a, b->brd) || /* Broadcast */
ipa_equal(*a, b->ip)) /* Our own address */
return -1; return -1;
return 1; return 1;
} }
return 0;
}
neighbor * neighbor *
neigh_find(struct proto *p, ip_addr *a, unsigned flags) neigh_find(struct proto *p, ip_addr *a, unsigned flags)
@ -69,7 +74,7 @@ neigh_find(struct proto *p, ip_addr *a, unsigned flags)
case -1: case -1:
return NULL; return NULL;
case 1: case 1:
if (!j || j->pxlen > i->pxlen) if (!j) /* FIXME: Search for _optimal_ iface route? */
j = i; j = i;
/* Fall-thru */ /* Fall-thru */
} }
@ -187,9 +192,19 @@ neigh_prune(void)
list iface_list; list iface_list;
void
ifa_dump(struct ifa *a)
{
debug("\t%I, net %I/%-2d bc %I -> %I%s%s\n", a->ip, a->prefix, a->pxlen, a->brd, a->opposite,
(a->flags & IF_UP) ? "" : " DOWN",
(a->flags & IA_PRIMARY) ? "" : " SEC");
}
void void
if_dump(struct iface *i) if_dump(struct iface *i)
{ {
struct ifa *a;
debug("IF%d: %s", i->index, i->name); debug("IF%d: %s", i->index, i->name);
if (i->flags & IF_ADMIN_DOWN) if (i->flags & IF_ADMIN_DOWN)
debug(" ADMIN-DOWN"); debug(" ADMIN-DOWN");
@ -213,8 +228,14 @@ if_dump(struct iface *i)
debug(" LOOP"); debug(" LOOP");
if (i->flags & IF_IGNORE) if (i->flags & IF_IGNORE)
debug(" IGN"); debug(" IGN");
if (i->flags & IF_TMP_DOWN)
debug(" TDOWN");
debug(" MTU=%d\n", i->mtu); debug(" MTU=%d\n", i->mtu);
debug("\t%I, net %I/%-2d bc %I -> %I\n", i->ip, i->prefix, i->pxlen, i->brd, i->opposite); WALK_LIST(a, i->addrs)
{
ifa_dump(a);
ASSERT((a != i->addr) == !(a->flags & IA_PRIMARY));
}
} }
void void
@ -228,138 +249,180 @@ if_dump_all(void)
debug("Router ID: %08x\n", config->router_id); debug("Router ID: %08x\n", config->router_id);
} }
static inline int static inline unsigned
if_change_too_big_p(struct iface *i, struct iface *j) if_what_changed(struct iface *i, struct iface *j)
{ {
if (!ipa_equal(i->ip, j->ip) || /* Address change isn't */ unsigned c;
!ipa_equal(i->prefix, j->prefix) ||
i->pxlen != j->pxlen || if (((i->flags ^ j->flags) & ~(IF_UP | IF_ADMIN_DOWN | IF_UPDATED | IF_LINK_UP | IF_TMP_DOWN | IF_JUST_CREATED))
!ipa_equal(i->brd, j->brd) || || i->index != j->index)
!ipa_equal(i->opposite, j->opposite)) return IF_CHANGE_TOO_MUCH;
return 1; c = 0;
if ((i->flags ^ j->flags) & ~(IF_UP | IF_ADMIN_DOWN | IF_UPDATED | IF_LINK_UP)) if ((i->flags ^ j->flags) & IF_UP)
return 1; /* Interface type change isn't as well */ c |= (i->flags & IF_UP) ? IF_CHANGE_DOWN : IF_CHANGE_UP;
return 0; if (i->mtu != j->mtu)
c |= IF_CHANGE_MTU;
return c;
} }
static inline void static inline void
if_copy(struct iface *to, struct iface *from) if_copy(struct iface *to, struct iface *from)
{ {
to->flags = from->flags; to->flags = from->flags | (to->flags & IF_TMP_DOWN);
to->mtu = from->mtu; to->mtu = from->mtu;
to->index = from->index;
to->neigh = from->neigh;
}
static unsigned
if_changed(struct iface *i, struct iface *j)
{
unsigned f = 0;
if (i->mtu != j->mtu)
f |= IF_CHANGE_MTU;
if ((i->flags ^ j->flags) & ~IF_UPDATED)
{
f |= IF_CHANGE_FLAGS;
if ((i->flags ^ j->flags) & IF_UP)
if (i->flags & IF_UP)
f |= IF_CHANGE_DOWN;
else
f |= IF_CHANGE_UP;
}
return f;
} }
static void static void
if_notify_change(unsigned c, struct iface *old, struct iface *new, struct iface *real) ifa_notify_change(unsigned c, struct ifa *a)
{ {
struct proto *p; struct proto *p;
debug("Interface change notification (%x) for %s\n", c, new->name); debug("IFA change notification (%x) for %s:%I\n", c, a->iface->name, a->ip);
if (old) WALK_LIST(p, proto_list)
if_dump(old); if (p->ifa_notify)
if (new) p->ifa_notify(p, c, a);
if_dump(new); }
static void
if_notify_change(unsigned c, struct iface *i)
{
struct proto *p;
struct ifa *a;
if (i->flags & IF_JUST_CREATED)
{
i->flags &= ~IF_JUST_CREATED;
c |= IF_CHANGE_CREATE | IF_CHANGE_MTU;
}
debug("Interface change notification (%x) for %s\n", c, i->name);
if_dump(i);
if (c & IF_CHANGE_UP) if (c & IF_CHANGE_UP)
neigh_if_up(real); neigh_if_up(i);
if (c & IF_CHANGE_DOWN)
WALK_LIST(a, i->addrs)
{
a->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
ifa_notify_change(IF_CHANGE_DOWN, a);
}
WALK_LIST(p, proto_list) WALK_LIST(p, proto_list)
if (p->if_notify) if (p->if_notify)
p->if_notify(p, c, new, old); p->if_notify(p, c, i);
if (c & IF_CHANGE_UP)
WALK_LIST(a, i->addrs)
{
a->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
ifa_notify_change(IF_CHANGE_UP, a);
}
if (c & IF_CHANGE_DOWN) if (c & IF_CHANGE_DOWN)
neigh_if_down(real); neigh_if_down(i);
} }
void static unsigned
if_recalc_flags(struct iface *i, unsigned flags)
{
if ((flags & (IF_ADMIN_DOWN | IF_TMP_DOWN)) ||
!(flags & IF_LINK_UP) ||
!i->addr)
flags &= ~IF_UP;
else
flags |= IF_UP;
return flags;
}
static void
if_change_flags(struct iface *i, unsigned flags)
{
unsigned of = i->flags;
i->flags = if_recalc_flags(i, flags);
if ((i->flags ^ of) & IF_UP)
if_notify_change((i->flags & IF_UP) ? IF_CHANGE_UP : IF_CHANGE_DOWN, i);
}
struct iface *
if_update(struct iface *new) if_update(struct iface *new)
{ {
struct iface *i; struct iface *i;
struct ifa *a, *b;
unsigned c; unsigned c;
if ((new->flags & IF_LINK_UP) && !(new->flags & IF_ADMIN_DOWN) && ipa_nonzero(new->ip))
new->flags |= IF_UP;
else
new->flags &= ~IF_UP;
WALK_LIST(i, iface_list) WALK_LIST(i, iface_list)
if (!strcmp(new->name, i->name)) if (!strcmp(new->name, i->name))
{ {
if (if_change_too_big_p(i, new)) /* Changed a lot, convert it to down/up */ new->addr = i->addr;
new->flags = if_recalc_flags(new, new->flags);
c = if_what_changed(i, new);
if (c & IF_CHANGE_TOO_MUCH) /* Changed a lot, convert it to down/up */
{ {
DBG("Interface %s changed too much -- forcing down/up transition\n", i->name); DBG("Interface %s changed too much -- forcing down/up transition\n", i->name);
if (i->flags & IF_UP) if_change_flags(i, i->flags | IF_TMP_DOWN);
{
struct iface j;
memcpy(&j, i, sizeof(struct iface));
i->flags &= ~IF_UP;
if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, &j, i, i);
}
rem_node(&i->n); rem_node(&i->n);
WALK_LIST_DELSAFE(a, b, i->addrs)
ifa_delete(a);
goto newif; goto newif;
} }
c = if_changed(i, new); else if (c)
if (c) {
if_notify_change(c, i, new, i); if_copy(i, new);
if_copy(i, new); /* Even if c==0 as we might need to update i->index et al. */ if_notify_change(c, i);
i->flags |= IF_UPDATED; }
return; i->flags |= IF_UPDATED;
return i;
} }
i = mb_alloc(if_pool, sizeof(struct iface)); i = mb_alloc(if_pool, sizeof(struct iface));
newif: newif:
memcpy(i, new, sizeof(*i)); memcpy(i, new, sizeof(*i));
i->flags |= IF_UPDATED; init_list(&i->addrs);
i->flags |= IF_UPDATED | IF_TMP_DOWN; /* Tmp down as we don't have addresses yet */
add_tail(&iface_list, &i->n); add_tail(&iface_list, &i->n);
if_notify_change(IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0) return i;
| IF_CHANGE_FLAGS | IF_CHANGE_MTU, NULL, i, i);
} }
void void
if_start_update(void) if_start_update(void)
{ {
struct iface *i; struct iface *i;
struct ifa *a;
WALK_LIST(i, iface_list) WALK_LIST(i, iface_list)
{
i->flags &= ~IF_UPDATED; i->flags &= ~IF_UPDATED;
WALK_LIST(a, i->addrs)
a->flags &= ~IF_UPDATED;
}
}
void
if_end_partial_update(struct iface *i)
{
if (i->flags & IF_TMP_DOWN)
if_change_flags(i, i->flags & ~IF_TMP_DOWN);
} }
void void
if_end_update(void) if_end_update(void)
{ {
struct iface *i, j; struct iface *i, j;
struct ifa *a, *b;
if (!config->router_id) if (!config->router_id)
auto_router_id(); auto_router_id();
WALK_LIST(i, iface_list) WALK_LIST(i, iface_list)
if (!(i->flags & IF_UPDATED))
{ {
memcpy(&j, i, sizeof(struct iface)); if (!(i->flags & IF_UPDATED))
i->flags = (i->flags & ~(IF_LINK_UP | IF_UP)) | IF_ADMIN_DOWN; if_change_flags(i, (i->flags & ~IF_LINK_UP) | IF_ADMIN_DOWN);
if (i->flags != j.flags) else
if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, &j, i, i); {
WALK_LIST_DELSAFE(a, b, i->addrs)
if (!(a->flags & IF_UPDATED))
ifa_delete(a);
if_end_partial_update(i);
}
} }
} }
@ -367,12 +430,19 @@ void
if_feed_baby(struct proto *p) if_feed_baby(struct proto *p)
{ {
struct iface *i; struct iface *i;
struct ifa *a;
if (!p->if_notify) if (!p->if_notify && !p->ifa_notify)
return; return;
debug("Announcing interfaces to new protocol %s\n", p->name); debug("Announcing interfaces to new protocol %s\n", p->name);
WALK_LIST(i, iface_list) WALK_LIST(i, iface_list)
p->if_notify(p, IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0), i, NULL); {
if (p->if_notify)
p->if_notify(p, IF_CHANGE_CREATE | ((i->flags & IF_UP) ? IF_CHANGE_UP : 0), i);
if (p->ifa_notify && (i->flags & IF_UP))
WALK_LIST(a, i->addrs)
p->ifa_notify(p, IF_CHANGE_CREATE | IF_CHANGE_UP, a);
}
} }
struct iface * struct iface *
@ -386,6 +456,96 @@ if_find_by_index(unsigned idx)
return NULL; return NULL;
} }
struct iface *
if_find_by_name(char *name)
{
struct iface *i;
WALK_LIST(i, iface_list)
if (!strcmp(i->name, name))
return i;
return NULL;
}
static int
ifa_recalc_primary(struct iface *i)
{
struct ifa *a, *b = NULL;
int res;
WALK_LIST(a, i->addrs)
{
if (!(a->flags & IA_SECONDARY) && (!b || a->scope > b->scope))
b = a;
a->flags &= ~IA_PRIMARY;
}
res = (b != i->addr);
i->addr = b;
if (b)
{
b->flags |= IA_PRIMARY;
rem_node(&b->n);
add_head(&i->addrs, &b->n);
}
return res;
}
struct ifa *
ifa_update(struct ifa *a)
{
struct iface *i = a->iface;
struct ifa *b;
WALK_LIST(b, i->addrs)
if (ipa_equal(b->ip, a->ip))
{
if (ipa_equal(b->prefix, a->prefix) &&
b->pxlen == a->pxlen &&
ipa_equal(b->brd, a->brd) &&
ipa_equal(b->opposite, a->opposite) &&
b->scope == a->scope)
{
b->flags |= IF_UPDATED;
return b;
}
ifa_delete(b);
break;
}
b = mb_alloc(if_pool, sizeof(struct ifa));
memcpy(b, a, sizeof(struct ifa));
add_tail(&i->addrs, &b->n);
b->flags = (i->flags & ~IA_FLAGS) | (a->flags & IA_FLAGS);
if ((!i->addr || i->addr->scope < b->scope) && ifa_recalc_primary(i))
if_change_flags(i, i->flags | IF_TMP_DOWN);
if (b->flags & IF_UP)
ifa_notify_change(IF_CHANGE_CREATE | IF_CHANGE_UP, b);
return b;
}
void
ifa_delete(struct ifa *a)
{
struct iface *i = a->iface;
struct ifa *b;
WALK_LIST(b, i->addrs)
if (ipa_equal(b->ip, a->ip))
{
rem_node(&b->n);
if (b->flags & IF_UP)
{
b->flags &= ~IF_UP;
ifa_notify_change(IF_CHANGE_DOWN, b);
}
if (b->flags & IA_PRIMARY)
{
if_change_flags(i, i->flags | IF_TMP_DOWN);
ifa_recalc_primary(i);
}
mb_free(b);
}
}
static void static void
auto_router_id(void) /* FIXME: What if we run IPv6??? */ auto_router_id(void) /* FIXME: What if we run IPv6??? */
{ {
@ -393,14 +553,15 @@ auto_router_id(void) /* FIXME: What if we run IPv6??? */
j = NULL; j = NULL;
WALK_LIST(i, iface_list) WALK_LIST(i, iface_list)
if ((i->flags & IF_UP) && if ((i->flags & IF_LINK_UP) &&
!(i->flags & (IF_UNNUMBERED | IF_IGNORE)) && !(i->flags & (IF_UNNUMBERED | IF_IGNORE | IF_ADMIN_DOWN)) &&
(!j || ipa_to_u32(i->ip) < ipa_to_u32(j->ip))) i->addr &&
(!j || ipa_to_u32(i->addr->ip) < ipa_to_u32(j->addr->ip)))
j = i; j = i;
if (!j) if (!j)
die("Cannot determine router ID (no suitable network interface found), please configure it manually"); die("Cannot determine router ID (no suitable network interface found), please configure it manually");
debug("Guessed router ID %I (%s)\n", j->ip, j->name); debug("Guessed router ID %I (%s)\n", j->addr->ip, j->name);
config->router_id = ipa_to_u32(j->ip); config->router_id = ipa_to_u32(j->addr->ip);
} }
void void

53
nest/iface.h
View file

@ -15,48 +15,69 @@ extern list iface_list;
struct proto; struct proto;
struct ifa { /* Interface address */
node n;
struct iface *iface; /* Interface this address belongs to */
ip_addr ip; /* IP address of this host */
ip_addr prefix; /* Network prefix */
unsigned pxlen; /* Prefix length */
ip_addr brd; /* Broadcast address */
ip_addr opposite; /* Opposite end of a point-to-point link */
unsigned scope; /* Interface address scope */
unsigned flags; /* Analogous to iface->flags */
};
struct iface { struct iface {
node n; node n;
char name[16]; char name[16];
unsigned flags; unsigned flags;
unsigned mtu; unsigned mtu;
unsigned index; /* OS-dependent interface index */ unsigned index; /* OS-dependent interface index */
ip_addr ip; /* IP address of this host (0=unset) */ list addrs; /* Addresses assigned to this interface */
ip_addr prefix; /* Network prefix */ struct ifa *addr; /* Primary address */
unsigned pxlen; /* Prefix length */
ip_addr brd; /* Broadcast address */
ip_addr opposite; /* Opposite end of a point-to-point link */
struct neighbor *neigh; /* List of neighbors on this interface */ struct neighbor *neigh; /* List of neighbors on this interface */
}; };
#define IF_UP 1 /* IF_LINK_UP, not IF_IGNORE and IP address known */ #define IF_UP 1 /* IF_LINK_UP and IP address known */
#define IF_MULTIACCESS 2 #define IF_MULTIACCESS 2
#define IF_UNNUMBERED 4 #define IF_UNNUMBERED 4
#define IF_BROADCAST 8 #define IF_BROADCAST 8
#define IF_MULTICAST 16 #define IF_MULTICAST 0x10
#define IF_TUNNEL 32 #define IF_TUNNEL 0x20
#define IF_ADMIN_DOWN 64 #define IF_ADMIN_DOWN 0x40
#define IF_LOOPBACK 128 #define IF_LOOPBACK 0x80
#define IF_IGNORE 256 #define IF_IGNORE 0x100 /* Not to be used by routing protocols (loopbacks etc.) */
#define IF_LINK_UP 512 #define IF_LINK_UP 0x200
#define IA_PRIMARY 0x10000 /* This address is primary */
#define IA_SECONDARY 0x20000 /* This address has been reported as secondary by the kernel */
#define IA_FLAGS 0xff0000
#define IF_JUST_CREATED 0x10000000 /* Send creation event as soon as possible */
#define IF_TMP_DOWN 0x20000000 /* Temporary shutdown due to interface reconfiguration */
#define IF_UPDATED 0x40000000 /* Touched in last scan */ #define IF_UPDATED 0x40000000 /* Touched in last scan */
/* Interface change events */ /* Interface change events */
#define IF_CHANGE_UP 1 #define IF_CHANGE_UP 1
#define IF_CHANGE_DOWN 2 #define IF_CHANGE_DOWN 2
#define IF_CHANGE_FLAGS 4 /* Can be converted to down/up internally */ #define IF_CHANGE_MTU 4
#define IF_CHANGE_MTU 8 #define IF_CHANGE_CREATE 8 /* Seen this interface for the first time */
#define IF_CHANGE_CREATE 16 /* Seen this interface for the first time */ #define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
void if_init(void); void if_init(void);
void if_dump(struct iface *); void if_dump(struct iface *);
void if_dump_all(void); void if_dump_all(void);
void if_update(struct iface *); void ifa_dump(struct ifa *);
struct iface *if_update(struct iface *);
struct ifa *ifa_update(struct ifa *);
void ifa_delete(struct ifa *);
void if_start_update(void); void if_start_update(void);
void if_end_update(void); void if_end_update(void);
void if_end_partial_update(struct iface *);
void if_feed_baby(struct proto *); void if_feed_baby(struct proto *);
struct iface *if_find_by_index(unsigned); struct iface *if_find_by_index(unsigned);
struct iface *if_find_by_name(char *);
/* /*
* Neighbor Cache. We hold (direct neighbor, protocol) pairs we've seen * Neighbor Cache. We hold (direct neighbor, protocol) pairs we've seen

5
nest/protocol.h
View file

@ -13,6 +13,7 @@
#include "lib/resource.h" #include "lib/resource.h"
struct iface; struct iface;
struct ifa;
struct rte; struct rte;
struct neighbor; struct neighbor;
struct rta; struct rta;
@ -96,6 +97,7 @@ struct proto {
* General protocol hooks: * General protocol hooks:
* *
* if_notify Notify protocol about interface state changes. * if_notify Notify protocol about interface state changes.
* ifa_notify Notify protocol about interface address changes.
* rt_notify Notify protocol about routing table updates. * rt_notify Notify protocol about routing table updates.
* neigh_notify Notify protocol about neighbor cache events. * neigh_notify Notify protocol about neighbor cache events.
* make_tmp_attrs Construct ea_list from private attrs stored in rte. * make_tmp_attrs Construct ea_list from private attrs stored in rte.
@ -106,7 +108,8 @@ struct proto {
* 0=process it through the import filter set by the user. * 0=process it through the import filter set by the user.
*/ */
void (*if_notify)(struct proto *, unsigned flags, struct iface *new, struct iface *old); void (*if_notify)(struct proto *, unsigned flags, struct iface *i);
void (*ifa_notify)(struct proto *, unsigned flags, struct ifa *a);
void (*rt_notify)(struct proto *, struct network *net, struct rte *new, struct rte *old); void (*rt_notify)(struct proto *, struct network *net, struct rte *new, struct rte *old);
void (*neigh_notify)(struct neighbor *neigh); void (*neigh_notify)(struct neighbor *neigh);
struct ea_list *(*make_tmp_attrs)(struct rte *rt, struct linpool *pool); struct ea_list *(*make_tmp_attrs)(struct rte *rt, struct linpool *pool);

23
nest/rt-dev.c
View file

@ -19,19 +19,18 @@
#include "lib/resource.h" #include "lib/resource.h"
static void static void
dev_if_notify(struct proto *p, unsigned c, struct iface *new, struct iface *old) dev_ifa_notify(struct proto *p, unsigned c, struct ifa *ad)
{ {
struct rt_dev_config *P = (void *) p->cf; struct rt_dev_config *P = (void *) p->cf;
if (old && !iface_patt_match(&P->iface_list, old) || if (!iface_patt_match(&P->iface_list, ad->iface))
new && !iface_patt_match(&P->iface_list, new))
return; return;
if (c & IF_CHANGE_DOWN) if (c & IF_CHANGE_DOWN)
{ {
net *n; net *n;
debug("dev_if_notify: %s going down\n", old->name); DBG("dev_if_notify: %s:%I going down\n", ad->iface->name, ad->ip);
n = net_find(p->table, old->prefix, old->pxlen); n = net_find(p->table, ad->prefix, ad->pxlen);
if (!n) if (!n)
{ {
debug("dev_if_notify: device shutdown: prefix not found\n"); debug("dev_if_notify: device shutdown: prefix not found\n");
@ -45,20 +44,20 @@ dev_if_notify(struct proto *p, unsigned c, struct iface *new, struct iface *old)
net *n; net *n;
rte *e; rte *e;
debug("dev_if_notify: %s going up\n", new->name); debug("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip);
bzero(&A, sizeof(A)); bzero(&A, sizeof(A));
A.proto = p; A.proto = p;
A.source = RTS_DEVICE; A.source = RTS_DEVICE;
A.scope = (new->flags & IF_LOOPBACK) ? SCOPE_HOST : SCOPE_UNIVERSE; A.scope = ad->scope;
A.cast = RTC_UNICAST; A.cast = RTC_UNICAST;
A.dest = RTD_DEVICE; A.dest = RTD_DEVICE;
A.iface = new; A.iface = ad->iface;
A.attrs = NULL; A.attrs = NULL;
a = rta_lookup(&A); a = rta_lookup(&A);
if (new->flags & IF_UNNUMBERED) if (ad->flags & IF_UNNUMBERED)
n = net_get(p->table, new->opposite, new->pxlen); n = net_get(p->table, ad->opposite, ad->pxlen);
else else
n = net_get(p->table, new->prefix, new->pxlen); n = net_get(p->table, ad->prefix, ad->pxlen);
e = rte_get_temp(a); e = rte_get_temp(a);
e->net = n; e->net = n;
e->pflags = 0; e->pflags = 0;
@ -71,7 +70,7 @@ dev_init(struct proto_config *c)
{ {
struct proto *p = proto_new(c, sizeof(struct proto)); struct proto *p = proto_new(c, sizeof(struct proto));
p->if_notify = dev_if_notify; p->ifa_notify = dev_ifa_notify;
return p; return p;
} }

22
proto/ospf/ospf.c
View file

@ -155,7 +155,7 @@ wait_timer_hook(timer *timer)
{ {
debug(" OSPF: Changing state into DR.\n"); debug(" OSPF: Changing state into DR.\n");
ifa->state=OSPF_IS_DR; ifa->state=OSPF_IS_DR;
ifa->drip=ifa->iface->ip; ifa->drip=ifa->iface->addr->ip;
/* FIXME: Set ifa->drid */ /* FIXME: Set ifa->drid */
} }
else else
@ -221,7 +221,7 @@ find_iface(struct proto_ospf *p, struct iface *what)
} }
void void
ospf_if_notify(struct proto *p, unsigned flags, struct iface *new, struct iface *old) ospf_if_notify(struct proto *p, unsigned flags, struct iface *iface)
{ {
struct ospf_iface *ifa; struct ospf_iface *ifa;
sock *mcsk, *newsk; sock *mcsk, *newsk;
@ -231,13 +231,15 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *new, struct iface
c=(struct ospf_config *)(p->cf); c=(struct ospf_config *)(p->cf);
DBG(" OSPF: If notify called\n"); DBG(" OSPF: If notify called\n");
if (iface->flags & IF_IGNORE)
return;
if((flags & IF_CHANGE_UP) && is_good_iface(p, new)) if((flags & IF_CHANGE_UP) && is_good_iface(p, iface))
{ {
debug(" OSPF: using interface %s.\n", new->name); debug(" OSPF: using interface %s.\n", iface->name);
/* FIXME: Latter I'll use config - this is incorrect */ /* FIXME: Latter I'll use config - this is incorrect */
ifa=mb_alloc(p->pool, sizeof(struct ospf_iface)); ifa=mb_alloc(p->pool, sizeof(struct ospf_iface));
ifa->iface=new; ifa->iface=iface;
add_tail(&((struct proto_ospf *)p)->iface_list, NODE ifa); add_tail(&((struct proto_ospf *)p)->iface_list, NODE ifa);
ospf_iface_default(ifa); ospf_iface_default(ifa);
/* FIXME: This should read config */ /* FIXME: This should read config */
@ -253,17 +255,17 @@ ospf_if_notify(struct proto *p, unsigned flags, struct iface *new, struct iface
if(flags & IF_CHANGE_DOWN) if(flags & IF_CHANGE_DOWN)
{ {
if((ifa=find_iface((struct proto_ospf *)p, old))!=NULL) if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
{ {
debug(" OSPF: killing interface %s.\n", old->name); debug(" OSPF: killing interface %s.\n", iface->name);
} }
} }
if(flags & IF_CHANGE_MTU) if(flags & IF_CHANGE_MTU)
{ {
if((ifa=find_iface((struct proto_ospf *)p, old))!=NULL) if((ifa=find_iface((struct proto_ospf *)p, iface))!=NULL)
{ {
debug(" OSPF: changing MTU on interface %s.\n", old->name); debug(" OSPF: changing MTU on interface %s.\n", iface->name);
} }
} }
} }
@ -321,6 +323,4 @@ struct protocol proto_ospf = {
start: ospf_start, start: ospf_start,
preconfig: ospf_preconfig, preconfig: ospf_preconfig,
postconfig: ospf_postconfig, postconfig: ospf_postconfig,
}; };

20
proto/rip/rip.c
View file

@ -491,9 +491,9 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags)
if (want_multicast) if (want_multicast)
rif->sock->daddr = ipa_from_u32(0x7f000001); /* FIXME: must lookup address in rfc's */ rif->sock->daddr = ipa_from_u32(0x7f000001); /* FIXME: must lookup address in rfc's */
if (flags & IF_BROADCAST) if (flags & IF_BROADCAST)
rif->sock->daddr = new->brd; rif->sock->daddr = new->addr->brd;
if (flags & IF_UNNUMBERED) if (flags & IF_UNNUMBERED)
rif->sock->daddr = new->opposite; rif->sock->daddr = new->addr->opposite;
if (!ipa_nonzero(rif->sock->daddr)) if (!ipa_nonzero(rif->sock->daddr))
log( L_WARN "RIP: interface %s is too strange for me", rif->iface ? rif->iface->name : "(dummy)" ); log( L_WARN "RIP: interface %s is too strange for me", rif->iface ? rif->iface->name : "(dummy)" );
@ -507,24 +507,26 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags)
} }
static void static void
rip_if_notify(struct proto *p, unsigned c, struct iface *new, struct iface *old) rip_if_notify(struct proto *p, unsigned c, struct iface *iface)
{ {
DBG( "RIP: if notify\n" ); DBG( "RIP: if notify\n" );
if (old) { if (iface->flags & IF_IGNORE)
return;
if (c & IF_CHANGE_DOWN) {
struct rip_interface *i; struct rip_interface *i;
i = find_interface(p, old); i = find_interface(p, iface);
if (i) { if (i) {
rem_node(NODE i); rem_node(NODE i);
kill_iface(p, i); kill_iface(p, i);
} }
} }
if (new) { if (c & IF_CHANGE_UP) {
struct rip_interface *rif; struct rip_interface *rif;
struct iface_patt *k = iface_patt_match(&P_CF->iface_list, new); struct iface_patt *k = iface_patt_match(&P_CF->iface_list, iface);
if (!k) return; /* We are not interested in this interface */ if (!k) return; /* We are not interested in this interface */
DBG("adding interface %s\n", new->name ); DBG("adding interface %s\n", iface->name );
rif = new_iface(p, new, new->flags); rif = new_iface(p, iface, iface->flags);
rif->patt = (void *) k; rif->patt = (void *) k;
add_head( &P->interfaces, NODE rif ); add_head( &P->interfaces, NODE rif );
} }

8
proto/static/static.c
View file

@ -134,7 +134,7 @@ static_dump(struct proto *p)
} }
static void static void
static_if_notify(struct proto *p, unsigned flags, struct iface *new, struct iface *old) static_if_notify(struct proto *p, unsigned flags, struct iface *i)
{ {
struct static_route *r; struct static_route *r;
struct static_config *c = (void *) p->cf; struct static_config *c = (void *) p->cf;
@ -142,13 +142,13 @@ static_if_notify(struct proto *p, unsigned flags, struct iface *new, struct ifac
if (flags & IF_CHANGE_UP) if (flags & IF_CHANGE_UP)
{ {
WALK_LIST(r, c->iface_routes) WALK_LIST(r, c->iface_routes)
if (!strcmp(r->if_name, new->name)) if (!strcmp(r->if_name, i->name))
static_install(p, r, new); static_install(p, r, i);
} }
else if (flags & IF_CHANGE_DOWN) else if (flags & IF_CHANGE_DOWN)
{ {
WALK_LIST(r, c->iface_routes) WALK_LIST(r, c->iface_routes)
if (!strcmp(r->if_name, old->name)) if (!strcmp(r->if_name, i->name))
static_remove(p, r); static_remove(p, r);
} }
} }

10
sysdep/linux/netlink/netlink.c
View file

@ -407,12 +407,16 @@ krt_if_scan(struct kif_proto *p)
* Routes * Routes
*/ */
int /* FIXME: Check use of this function in krt.c */ int
krt_capable(rte *e) krt_capable(rte *e)
{ {
rta *a = e->attrs; rta *a = e->attrs;
if (a->cast != RTC_UNICAST) /* FIXME: For IPv6, we might support anycasts as well */ if (a->cast != RTC_UNICAST
#ifdef IPV6
&& a->cast != RTC_ANYCAST
#endif
)
return 0; return 0;
if (a->source == RTS_DEVICE) /* Kernel takes care of device routes itself */ if (a->source == RTS_DEVICE) /* Kernel takes care of device routes itself */
return 0; return 0;
@ -597,7 +601,7 @@ nl_parse_route(struct krt_proto *p, struct nlmsghdr *h, int scan)
net = net_get(&master_table, dst, i->rtm_dst_len); net = net_get(&master_table, dst, i->rtm_dst_len);
ra.proto = &p->p; ra.proto = &p->p;
ra.source = RTS_INHERIT; ra.source = RTS_INHERIT;
ra.scope = SCOPE_UNIVERSE; /* FIXME: Use kernel scope? */ ra.scope = SCOPE_UNIVERSE;
ra.cast = RTC_UNICAST; ra.cast = RTC_UNICAST;
ra.flags = ra.aflags = 0; ra.flags = ra.aflags = 0;
ra.from = IPA_NONE; ra.from = IPA_NONE;

8
sysdep/unix/io.c
View file

@ -414,14 +414,14 @@ sk_open(sock *s)
#ifdef HAVE_STRUCT_IP_MREQN #ifdef HAVE_STRUCT_IP_MREQN
struct ip_mreqn mreq; struct ip_mreqn mreq;
#define mreq_add mreq #define mreq_add mreq
ASSERT(s->iface); ASSERT(s->iface && s->iface->addr);
mreq.imr_ifindex = s->iface->index; mreq.imr_ifindex = s->iface->index;
set_inaddr(&mreq.imr_address, s->iface->ip); set_inaddr(&mreq.imr_address, s->iface->addr->ip);
#else #else
struct in_addr mreq; struct in_addr mreq;
struct ip_mreq mreq_add; struct ip_mreq mreq_add;
ASSERT(s->iface); ASSERT(s->iface && s->iface->addr);
set_inaddr(&mreq, s->iface->ip); set_inaddr(&mreq, s->iface->addr->ip);
#ifdef SO_BINDTODEVICE #ifdef SO_BINDTODEVICE
{ {
struct ifreq ifr; struct ifreq ifr;

42
sysdep/unix/krt-iface.c
View file

@ -30,7 +30,8 @@ int if_scan_sock = -1;
static void static void
scan_ifs(struct ifreq *r, int cnt) scan_ifs(struct ifreq *r, int cnt)
{ {
struct iface i; struct iface i, *pi;
struct ifa a;
char *err; char *err;
unsigned fl; unsigned fl;
ip_addr netmask; ip_addr netmask;
@ -40,6 +41,7 @@ scan_ifs(struct ifreq *r, int cnt)
for (cnt /= sizeof(struct ifreq); cnt; cnt--, r++) for (cnt /= sizeof(struct ifreq); cnt; cnt--, r++)
{ {
bzero(&i, sizeof(i)); bzero(&i, sizeof(i));
bzero(&a, sizeof(a));
DBG("%s\n", r->ifr_name); DBG("%s\n", r->ifr_name);
if (strchr(r->ifr_name, ':')) if (strchr(r->ifr_name, ':'))
{ {
@ -48,18 +50,22 @@ scan_ifs(struct ifreq *r, int cnt)
continue; continue;
} }
strncpy(i.name, r->ifr_name, sizeof(i.name) - 1); strncpy(i.name, r->ifr_name, sizeof(i.name) - 1);
get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &i.ip, NULL); get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &a.ip, NULL);
if (ipa_nonzero(i.ip)) if (ipa_nonzero(a.ip))
{ {
l = ipa_classify(i.ip); l = ipa_classify(a.ip);
if (l < 0 || !(l & IADDR_HOST)) if (l < 0 || !(l & IADDR_HOST))
{ {
log(L_ERR "%s: Invalid interface address", i.name); log(L_ERR "%s: Invalid interface address", i.name);
i.ip = IPA_NONE; a.ip = IPA_NONE;
} }
else if ((l & IADDR_SCOPE_MASK) == SCOPE_HOST) else
{
a.scope = l & IADDR_SCOPE_MASK;
if (a.scope == SCOPE_HOST)
i.flags |= IF_LOOPBACK | IF_IGNORE; i.flags |= IF_LOOPBACK | IF_IGNORE;
} }
}
if (ioctl(if_scan_sock, SIOCGIFFLAGS, r) < 0) if (ioctl(if_scan_sock, SIOCGIFFLAGS, r) < 0)
{ {
@ -83,15 +89,15 @@ scan_ifs(struct ifreq *r, int cnt)
log(L_ERR "%s: Invalid netmask", i.name); log(L_ERR "%s: Invalid netmask", i.name);
goto bad; goto bad;
} }
i.pxlen = l; a.pxlen = l;
if (fl & IFF_POINTOPOINT) if (fl & IFF_POINTOPOINT)
{ {
i.flags |= IF_UNNUMBERED; i.flags |= IF_UNNUMBERED;
i.pxlen = BITS_PER_IP_ADDRESS; a.pxlen = BITS_PER_IP_ADDRESS;
if (ioctl(if_scan_sock, SIOCGIFDSTADDR, r) < 0) if (ioctl(if_scan_sock, SIOCGIFDSTADDR, r) < 0)
{ err = "SIOCGIFDSTADDR"; goto faulty; } { err = "SIOCGIFDSTADDR"; goto faulty; }
get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &i.opposite, NULL); get_sockaddr((struct sockaddr_in *) &r->ifr_addr, &a.opposite, NULL);
} }
if (fl & IFF_LOOPBACK) if (fl & IFF_LOOPBACK)
i.flags |= IF_LOOPBACK | IF_IGNORE; i.flags |= IF_LOOPBACK | IF_IGNORE;
@ -100,24 +106,24 @@ scan_ifs(struct ifreq *r, int cnt)
#endif #endif
i.flags |= IF_MULTICAST; i.flags |= IF_MULTICAST;
i.prefix = ipa_and(i.ip, ipa_mkmask(i.pxlen)); a.prefix = ipa_and(a.ip, ipa_mkmask(a.pxlen));
if (i.pxlen < 32) if (a.pxlen < 32)
{ {
i.brd = ipa_or(i.prefix, ipa_not(ipa_mkmask(i.pxlen))); a.brd = ipa_or(a.prefix, ipa_not(ipa_mkmask(a.pxlen)));
if (ipa_equal(i.ip, i.prefix) || ipa_equal(i.ip, i.brd)) 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); log(L_ERR "%s: Using network or broadcast address for interface", i.name);
goto bad; goto bad;
} }
if (fl & IFF_BROADCAST) if (fl & IFF_BROADCAST)
i.flags |= IF_BROADCAST; i.flags |= IF_BROADCAST;
if (i.pxlen < 30) if (a.pxlen < 30)
i.flags |= IF_MULTIACCESS; i.flags |= IF_MULTIACCESS;
else else
i.opposite = ipa_opposite(i.ip); a.opposite = ipa_opposite(a.ip);
} }
else else
i.brd = i.opposite; a.brd = a.opposite;
if (ioctl(if_scan_sock, SIOCGIFMTU, r) < 0) if (ioctl(if_scan_sock, SIOCGIFMTU, r) < 0)
{ err = "SIOCGIFMTU"; goto faulty; } { err = "SIOCGIFMTU"; goto faulty; }
@ -132,7 +138,9 @@ scan_ifs(struct ifreq *r, int cnt)
/* FIXME: What else? Guess ifindex (we need it at least for OSPF on unnumbered links)? */ /* FIXME: What else? Guess ifindex (we need it at least for OSPF on unnumbered links)? */
#endif #endif
if_update(&i); pi = if_update(&i);
a.iface = pi;
ifa_update(&a);
} }
if_end_update(); if_end_update();
} }