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Implements protocol templates.

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Based on the patch from Alexander V. Chernikov.
Extended to support almost all protocols.
Uses 'protocol bgp NAME from TEMPLATE { ... }' syntax.
This commit is contained in:
Ondrej Zajicek
2011-11-07 00:31:23 +01:00
parent 74add5df17
commit a7f23f581f
34 changed files with 387 additions and 110 deletions
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122
proto/bgp/bgp.c
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@@ -919,6 +919,73 @@ bgp_init(struct proto_config *C)
return P;
}
void
bgp_check_config(struct bgp_config *c)
{
int internal = (c->local_as == c->remote_as);
/* Do not check templates at all */
if (c->c.class == SYM_TEMPLATE)
return;
if (!c->local_as)
cf_error("Local AS number must be set");
if (!c->remote_as)
cf_error("Neighbor must be configured");
if (!(c->capabilities && c->enable_as4) && (c->remote_as > 0xFFFF))
cf_error("Neighbor AS number out of range (AS4 not available)");
if (!internal && c->rr_client)
cf_error("Only internal neighbor can be RR client");
if (internal && c->rs_client)
cf_error("Only external neighbor can be RS client");
if (c->multihop && (c->gw_mode == GW_DIRECT))
cf_error("Multihop BGP cannot use direct gateway mode");
/* Different default based on rs_client */
if (!c->missing_lladdr)
c->missing_lladdr = c->rs_client ? MLL_IGNORE : MLL_SELF;
/* Different default for gw_mode */
if (!c->gw_mode)
c->gw_mode = (c->multihop || internal) ? GW_RECURSIVE : GW_DIRECT;
}
static int
bgp_reconfigure(struct proto *P, struct proto_config *C)
{
struct bgp_config *new = (struct bgp_config *) C;
struct bgp_proto *p = (struct bgp_proto *) P;
struct bgp_config *old = p->cf;
int same = !memcmp(((byte *) old) + sizeof(struct proto_config),
((byte *) new) + sizeof(struct proto_config),
// password item is last and must be checked separately
OFFSETOF(struct bgp_config, password) - sizeof(struct proto_config))
&& ((!old->password && !new->password)
|| (old->password && new->password && !strcmp(old->password, new->password)))
&& (get_igp_table(old) == get_igp_table(new));
/* We should update our copy of configuration ptr as old configuration will be freed */
if (same)
p->cf = new;
return same;
}
static void
bgp_copy_config(struct proto_config *dest, struct proto_config *src)
{
/* Just a shallow copy */
proto_copy_rest(dest, src, sizeof(struct bgp_config));
}
/**
* bgp_error - report a protocol error
* @c: connection
@@ -983,38 +1050,6 @@ bgp_store_error(struct bgp_proto *p, struct bgp_conn *c, u8 class, u32 code)
p->last_error_code = code;
}
void
bgp_check(struct bgp_config *c)
{
int internal = (c->local_as == c->remote_as);
if (!c->local_as)
cf_error("Local AS number must be set");
if (!c->remote_as)
cf_error("Neighbor must be configured");
if (!(c->capabilities && c->enable_as4) && (c->remote_as > 0xFFFF))
cf_error("Neighbor AS number out of range (AS4 not available)");
if (!internal && c->rr_client)
cf_error("Only internal neighbor can be RR client");
if (internal && c->rs_client)
cf_error("Only external neighbor can be RS client");
if (c->multihop && (c->gw_mode == GW_DIRECT))
cf_error("Multihop BGP cannot use direct gateway mode");
/* Different default based on rs_client */
if (!c->missing_lladdr)
c->missing_lladdr = c->rs_client ? MLL_IGNORE : MLL_SELF;
/* Different default for gw_mode */
if (!c->gw_mode)
c->gw_mode = (c->multihop || internal) ? GW_RECURSIVE : GW_DIRECT;
}
static char *bgp_state_names[] = { "Idle", "Connect", "Active", "OpenSent", "OpenConfirm", "Established", "Close" };
static char *bgp_err_classes[] = { "", "Error: ", "Socket: ", "Received: ", "BGP Error: ", "Automatic shutdown: ", ""};
static char *bgp_misc_errors[] = { "", "Neighbor lost", "Invalid next hop", "Kernel MD5 auth failed", "No listening socket" };
@@ -1124,28 +1159,6 @@ bgp_show_proto_info(struct proto *P)
}
}
static int
bgp_reconfigure(struct proto *P, struct proto_config *C)
{
struct bgp_config *new = (struct bgp_config *) C;
struct bgp_proto *p = (struct bgp_proto *) P;
struct bgp_config *old = p->cf;
int same = !memcmp(((byte *) old) + sizeof(struct proto_config),
((byte *) new) + sizeof(struct proto_config),
// password item is last and must be checked separately
OFFSETOF(struct bgp_config, password) - sizeof(struct proto_config))
&& ((!old->password && !new->password)
|| (old->password && new->password && !strcmp(old->password, new->password)))
&& (get_igp_table(old) == get_igp_table(new));
/* We should update our copy of configuration ptr as old configuration will be freed */
if (same)
p->cf = new;
return same;
}
struct protocol proto_bgp = {
name: "BGP",
template: "bgp%d",
@@ -1155,6 +1168,7 @@ struct protocol proto_bgp = {
shutdown: bgp_shutdown,
cleanup: bgp_cleanup,
reconfigure: bgp_reconfigure,
copy_config: bgp_copy_config,
get_status: bgp_get_status,
get_attr: bgp_get_attr,
get_route_info: bgp_get_route_info,