3991d84e8f
of calling the protocols manually. Implemented printing of dynamic attributes in `show route all'. Each protocol can now register its own attribute class (protocol->attr_class, set to EAP_xxx) and also a callback for naming and formatting of attributes. The callback can return one of the following results: GA_UNKNOWN Attribute not recognized. GA_NAME Attribute name recognized and put to the buffer, generic code should format the value. GA_FULL Both attribute name and value put to the buffer. Please update protocols generating dynamic attributes to provide the attr_class and formatting hook.
645 lines
14 KiB
C
645 lines
14 KiB
C
/*
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* BIRD -- Protocols
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*
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* (c) 1998--2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#undef LOCAL_DEBUG
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#include "nest/bird.h"
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#include "nest/protocol.h"
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#include "lib/resource.h"
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#include "lib/lists.h"
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#include "lib/event.h"
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#include "lib/string.h"
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#include "conf/conf.h"
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#include "nest/route.h"
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#include "nest/iface.h"
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#include "nest/cli.h"
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#include "filter/filter.h"
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static pool *proto_pool;
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static list protocol_list;
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static list proto_list;
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#define WALK_PROTO_LIST(p) do { \
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node *nn; \
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WALK_LIST(nn, proto_list) { \
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struct proto *p = SKIP_BACK(struct proto, glob_node, nn);
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#define WALK_PROTO_LIST_END } } while(0)
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#define PD(pr, msg, args...) do { if (pr->debug & D_STATES) { log(L_TRACE "%s: " msg, pr->name , ## args); } } while(0)
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list active_proto_list;
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static list inactive_proto_list;
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static list initial_proto_list;
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static list flush_proto_list;
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static event *proto_flush_event;
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static char *p_states[] = { "DOWN", "START", "UP", "STOP" };
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static char *c_states[] = { "HUNGRY", "FEEDING", "HAPPY", "FLUSHING" };
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static int proto_flush_all(void *);
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static void proto_rethink_goal(struct proto *p);
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static char *proto_state_name(struct proto *p);
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static void
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proto_enqueue(list *l, struct proto *p)
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{
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add_tail(l, &p->n);
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p->last_state_change = now;
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}
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static void
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proto_relink(struct proto *p)
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{
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list *l;
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PD(p, "State changed to %s", proto_state_name(p));
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rem_node(&p->n);
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switch (p->core_state)
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{
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case FS_HAPPY:
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l = &active_proto_list;
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break;
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case FS_FLUSHING:
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l = &flush_proto_list;
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break;
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default:
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l = &inactive_proto_list;
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}
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proto_enqueue(l, p);
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}
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void *
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proto_new(struct proto_config *c, unsigned size)
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{
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struct protocol *pr = c->protocol;
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struct proto *p = mb_allocz(proto_pool, size);
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p->cf = c;
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p->debug = c->debug;
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p->name = c->name;
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p->preference = c->preference;
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p->disabled = c->disabled;
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p->proto = pr;
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p->table = c->table->table;
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p->in_filter = c->in_filter;
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p->out_filter = c->out_filter;
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p->min_scope = SCOPE_SITE;
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p->hash_key = random_u32();
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c->proto = p;
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return p;
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}
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static void
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proto_init_instance(struct proto *p)
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{
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/* Here we cannot use p->cf->name since it won't survive reconfiguration */
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p->pool = rp_new(proto_pool, p->proto->name);
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p->attn = ev_new(p->pool);
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p->attn->data = p;
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rt_lock_table(p->table);
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}
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struct announce_hook *
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proto_add_announce_hook(struct proto *p, struct rtable *t)
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{
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struct announce_hook *h;
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if (!p->rt_notify)
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return NULL;
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DBG("Connecting protocol %s to table %s\n", p->name, t->name);
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PD(p, "Connected to table %s", t->name);
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h = mb_alloc(p->pool, sizeof(struct announce_hook));
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h->table = t;
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h->proto = p;
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h->next = p->ahooks;
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p->ahooks = h;
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add_tail(&t->hooks, &h->n);
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return h;
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}
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static void
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proto_flush_hooks(struct proto *p)
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{
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struct announce_hook *h;
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for(h=p->ahooks; h; h=h->next)
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rem_node(&h->n);
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p->ahooks = NULL;
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}
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void *
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proto_config_new(struct protocol *pr, unsigned size)
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{
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struct proto_config *c = cfg_allocz(size);
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add_tail(&new_config->protos, &c->n);
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c->global = new_config;
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c->protocol = pr;
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c->name = pr->name;
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c->out_filter = FILTER_REJECT;
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c->table = c->global->master_rtc;
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c->debug = new_config->proto_default_debug;
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return c;
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}
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void
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protos_preconfig(struct config *c)
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{
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struct protocol *p;
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init_list(&c->protos);
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DBG("Protocol preconfig:");
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WALK_LIST(p, protocol_list)
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{
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DBG(" %s", p->name);
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p->name_counter = 0;
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if (p->preconfig)
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p->preconfig(p, c);
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}
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DBG("\n");
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}
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void
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protos_postconfig(struct config *c)
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{
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struct proto_config *x;
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struct protocol *p;
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DBG("Protocol postconfig:");
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WALK_LIST(x, c->protos)
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{
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DBG(" %s", x->name);
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p = x->protocol;
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if (p->postconfig)
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p->postconfig(x);
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}
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DBG("\n");
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}
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static struct proto *
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proto_init(struct proto_config *c)
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{
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struct protocol *p = c->protocol;
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struct proto *q = p->init(c);
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q->proto_state = PS_DOWN;
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q->core_state = FS_HUNGRY;
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proto_enqueue(&initial_proto_list, q);
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add_tail(&proto_list, &q->glob_node);
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PD(q, "Initializing");
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return q;
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}
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void
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protos_commit(struct config *new, struct config *old, int force_reconfig)
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{
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struct proto_config *oc, *nc;
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struct proto *p, *n;
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DBG("protos_commit:\n");
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if (old)
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{
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WALK_LIST(oc, old->protos)
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{
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struct proto *p = oc->proto;
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struct symbol *sym = cf_find_symbol(oc->name);
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if (sym && sym->class == SYM_PROTO && !new->shutdown)
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{
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/* Found match, let's check if we can smoothly switch to new configuration */
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nc = sym->def;
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if (!force_reconfig
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&& nc->protocol == oc->protocol
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&& nc->preference == oc->preference
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&& nc->disabled == oc->disabled
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&& nc->table->table == oc->table->table
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&& filter_same(nc->in_filter, oc->in_filter)
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&& filter_same(nc->out_filter, oc->out_filter)
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&& p->proto_state != PS_DOWN)
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{
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/* Generic attributes match, try converting them and then ask the protocol */
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p->debug = nc->debug;
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if (p->proto->reconfigure && p->proto->reconfigure(p, nc))
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{
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DBG("\t%s: same\n", oc->name);
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PD(p, "Reconfigured");
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p->cf = nc;
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p->name = nc->name;
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nc->proto = p;
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continue;
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}
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}
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/* Unsuccessful, force reconfig */
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DBG("\t%s: power cycling\n", oc->name);
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PD(p, "Reconfiguration failed, restarting");
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p->cf_new = nc;
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nc->proto = p;
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}
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else
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{
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DBG("\t%s: deleting\n", oc->name);
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PD(p, "Unconfigured");
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p->cf_new = NULL;
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}
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p->reconfiguring = 1;
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config_add_obstacle(old);
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proto_rethink_goal(p);
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}
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}
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WALK_LIST(nc, new->protos)
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if (!nc->proto)
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{
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DBG("\t%s: adding\n", nc->name);
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proto_init(nc);
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}
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DBG("\tdone\n");
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DBG("Protocol start\n");
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WALK_LIST_DELSAFE(p, n, initial_proto_list)
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proto_rethink_goal(p);
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}
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static void
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proto_rethink_goal(struct proto *p)
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{
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struct protocol *q;
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if (p->reconfiguring && p->core_state == FS_HUNGRY && p->proto_state == PS_DOWN)
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{
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struct proto_config *nc = p->cf_new;
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DBG("%s has shut down for reconfiguration\n", p->name);
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config_del_obstacle(p->cf->global);
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rem_node(&p->n);
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rem_node(&p->glob_node);
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mb_free(p);
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if (!nc)
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return;
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p = proto_init(nc);
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}
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/* Determine what state we want to reach */
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if (p->disabled || p->reconfiguring)
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p->core_goal = FS_HUNGRY;
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else
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p->core_goal = FS_HAPPY;
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if (p->core_state == p->core_goal)
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return;
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q = p->proto;
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if (p->core_goal == FS_HAPPY) /* Going up */
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{
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if (p->core_state == FS_HUNGRY && p->proto_state == PS_DOWN)
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{
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DBG("Kicking %s up\n", p->name);
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PD(p, "Starting");
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proto_init_instance(p);
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proto_notify_state(p, (q->start ? q->start(p) : PS_UP));
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}
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}
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else /* Going down */
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{
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if (p->proto_state == PS_START || p->proto_state == PS_UP)
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{
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DBG("Kicking %s down\n", p->name);
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PD(p, "Shutting down");
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proto_notify_state(p, (q->shutdown ? q->shutdown(p) : PS_DOWN));
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}
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}
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}
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void
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protos_dump_all(void)
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{
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struct proto *p;
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debug("Protocols:\n");
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WALK_LIST(p, active_proto_list)
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{
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debug(" protocol %s state %s/%s\n", p->name,
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p_states[p->proto_state], c_states[p->core_state]);
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if (p->in_filter)
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debug("\tInput filter: %s\n", filter_name(p->in_filter));
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if (p->out_filter != FILTER_REJECT)
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debug("\tOutput filter: %s\n", filter_name(p->out_filter));
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if (p->disabled)
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debug("\tDISABLED\n");
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else if (p->proto->dump)
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p->proto->dump(p);
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}
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WALK_LIST(p, inactive_proto_list)
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debug(" inactive %s: state %s/%s\n", p->name, p_states[p->proto_state], c_states[p->core_state]);
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WALK_LIST(p, initial_proto_list)
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debug(" initial %s\n", p->name);
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WALK_LIST(p, flush_proto_list)
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debug(" flushing %s\n", p->name);
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}
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void
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proto_build(struct protocol *p)
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{
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add_tail(&protocol_list, &p->n);
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if (p->attr_class)
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{
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ASSERT(!attr_class_to_protocol[p->attr_class]);
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attr_class_to_protocol[p->attr_class] = p;
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}
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}
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void
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protos_build(void)
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{
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init_list(&protocol_list);
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init_list(&proto_list);
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init_list(&active_proto_list);
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init_list(&inactive_proto_list);
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init_list(&initial_proto_list);
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init_list(&flush_proto_list);
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proto_build(&proto_device);
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#ifdef CONFIG_RIP
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proto_build(&proto_rip);
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#endif
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#ifdef CONFIG_STATIC
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proto_build(&proto_static);
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#endif
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#ifdef CONFIG_OSPF
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proto_build(&proto_ospf);
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#endif
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#ifdef CONFIG_PIPE
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proto_build(&proto_pipe);
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#endif
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#ifdef CONFIG_BGP
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proto_build(&proto_bgp);
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#endif
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proto_pool = rp_new(&root_pool, "Protocols");
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proto_flush_event = ev_new(proto_pool);
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proto_flush_event->hook = proto_flush_all;
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}
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static void
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proto_fell_down(struct proto *p)
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{
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DBG("Protocol %s down\n", p->name);
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rt_unlock_table(p->table);
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proto_rethink_goal(p);
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}
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static int
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proto_feed(void *P)
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{
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struct proto *p = P;
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DBG("Feeding protocol %s\n", p->name);
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proto_add_announce_hook(p, p->table);
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if_feed_baby(p);
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rt_feed_baby(p);
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p->core_state = FS_HAPPY;
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proto_relink(p);
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DBG("Protocol %s up and running\n", p->name);
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return 0;
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}
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void
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proto_notify_state(struct proto *p, unsigned ps)
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{
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unsigned ops = p->proto_state;
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unsigned cs = p->core_state;
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DBG("%s reporting state transition %s/%s -> */%s\n", p->name, c_states[cs], p_states[ops], p_states[ps]);
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if (ops == ps)
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return;
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switch (ps)
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{
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case PS_DOWN:
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if (cs == FS_HUNGRY) /* Shutdown finished */
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{
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proto_fell_down(p);
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return; /* The protocol might have ceased to exist */
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}
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else if (cs == FS_FLUSHING) /* Still flushing... */
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;
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else /* Need to start flushing */
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goto schedule_flush;
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break;
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case PS_START:
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ASSERT(ops == PS_DOWN);
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ASSERT(cs == FS_HUNGRY);
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break;
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case PS_UP:
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ASSERT(ops == PS_DOWN || ops == PS_START);
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ASSERT(cs == FS_HUNGRY);
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DBG("%s: Scheduling meal\n", p->name);
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cs = FS_FEEDING;
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p->attn->hook = proto_feed;
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ev_schedule(p->attn);
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break;
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case PS_STOP:
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if (cs == FS_FEEDING || cs == FS_HAPPY)
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{
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schedule_flush:
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DBG("%s: Scheduling flush\n", p->name);
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proto_flush_hooks(p);
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cs = FS_FLUSHING;
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ev_schedule(proto_flush_event);
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}
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break;
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default:
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error:
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bug("Invalid state transition for %s from %s/%s to */%s", p->name, c_states[cs], p_states[ops], p_states[ps]);
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}
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p->proto_state = ps;
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p->core_state = cs;
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proto_relink(p);
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}
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static int
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proto_flush_all(void *unused)
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{
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struct proto *p;
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rt_prune_all();
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neigh_prune();
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while ((p = HEAD(flush_proto_list))->n.next)
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{
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DBG("Flushing protocol %s\n", p->name);
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rfree(p->pool);
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p->pool = NULL;
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p->core_state = FS_HUNGRY;
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proto_relink(p);
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proto_fell_down(p);
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}
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return 0;
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}
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/*
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* CLI Commands
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*/
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static char *
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proto_state_name(struct proto *p)
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{
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#define P(x,y) ((x << 4) | y)
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switch (P(p->proto_state, p->core_state))
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{
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case P(PS_DOWN, FS_HUNGRY): return "down";
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case P(PS_START, FS_HUNGRY): return "start";
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case P(PS_UP, FS_HUNGRY):
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case P(PS_UP, FS_FEEDING): return "feed";
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case P(PS_STOP, FS_HUNGRY): return "stop";
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case P(PS_UP, FS_HAPPY): return "up";
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case P(PS_STOP, FS_FLUSHING):
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case P(PS_DOWN, FS_FLUSHING): return "flush";
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default: return "???";
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}
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#undef P
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}
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static void
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proto_do_show(struct proto *p, int verbose)
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{
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byte buf[256], reltime[TM_RELTIME_BUFFER_SIZE];
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buf[0] = 0;
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if (p->proto->get_status)
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p->proto->get_status(p, buf);
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tm_format_reltime(reltime, p->last_state_change);
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cli_msg(-1002, "%-8s %-8s %-8s %-5s %-5s %s",
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p->name,
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p->proto->name,
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p->table->name,
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proto_state_name(p),
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reltime,
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buf);
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if (verbose)
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{
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cli_msg(-1006, "\tPreference: %d", p->preference);
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cli_msg(-1006, "\tInput filter: %s", filter_name(p->in_filter));
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cli_msg(-1006, "\tOutput filter: %s", filter_name(p->out_filter));
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}
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}
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void
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|
proto_show(struct symbol *s, int verbose)
|
|
{
|
|
if (s && s->class != SYM_PROTO)
|
|
{
|
|
cli_msg(9002, "%s is not a protocol", s->name);
|
|
return;
|
|
}
|
|
cli_msg(-2002, "name proto table state since info");
|
|
if (s)
|
|
proto_do_show(((struct proto_config *)s->def)->proto, verbose);
|
|
else
|
|
{
|
|
WALK_PROTO_LIST(p)
|
|
proto_do_show(p, verbose);
|
|
WALK_PROTO_LIST_END;
|
|
}
|
|
cli_msg(0, "");
|
|
}
|
|
|
|
struct proto *
|
|
proto_get_named(struct symbol *sym, struct protocol *pr)
|
|
{
|
|
struct proto *p, *q;
|
|
|
|
if (sym)
|
|
{
|
|
if (sym->class != SYM_PROTO)
|
|
cf_error("%s: Not a protocol", sym->name);
|
|
p = ((struct proto_config *)sym->def)->proto;
|
|
if (!p || p->proto != pr)
|
|
cf_error("%s: Not a %s protocol", sym->name, pr->name);
|
|
}
|
|
else
|
|
{
|
|
p = NULL;
|
|
WALK_LIST(q, active_proto_list)
|
|
if (q->proto == pr)
|
|
{
|
|
if (p)
|
|
cf_error("There are multiple %s protocols running", pr->name);
|
|
p = q;
|
|
}
|
|
if (!p)
|
|
cf_error("There is no %s protocol running", pr->name);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
void
|
|
proto_xxable(char *pattern, int xx)
|
|
{
|
|
int cnt = 0;
|
|
WALK_PROTO_LIST(p)
|
|
if (patmatch(pattern, p->name))
|
|
{
|
|
cnt++;
|
|
switch (xx)
|
|
{
|
|
case 0:
|
|
if (p->disabled)
|
|
cli_msg(-8, "%s: already disabled", p->name);
|
|
else
|
|
{
|
|
cli_msg(-9, "%s: disabled", p->name);
|
|
p->disabled = 1;
|
|
}
|
|
break;
|
|
case 1:
|
|
if (!p->disabled)
|
|
cli_msg(-10, "%s: already enabled", p->name);
|
|
else
|
|
{
|
|
cli_msg(-11, "%s: enabled", p->name);
|
|
p->disabled = 0;
|
|
}
|
|
break;
|
|
case 2:
|
|
if (p->disabled)
|
|
cli_msg(-8, "%s: already disabled", p->name);
|
|
else
|
|
{
|
|
p->disabled = 1;
|
|
proto_rethink_goal(p);
|
|
p->disabled = 0;
|
|
cli_msg(-12, "%s: restarted", p->name);
|
|
}
|
|
break;
|
|
default:
|
|
ASSERT(0);
|
|
}
|
|
proto_rethink_goal(p);
|
|
}
|
|
WALK_PROTO_LIST_END;
|
|
if (!cnt)
|
|
cli_msg(8003, "No protocols match");
|
|
else
|
|
cli_msg(0, "");
|
|
}
|
|
|
|
void
|
|
proto_debug(char *pattern, unsigned int mask)
|
|
{
|
|
int cnt = 0;
|
|
WALK_PROTO_LIST(p)
|
|
if (patmatch(pattern, p->name))
|
|
{
|
|
cnt++;
|
|
p->debug = mask;
|
|
}
|
|
WALK_PROTO_LIST_END;
|
|
if (!cnt)
|
|
cli_msg(8003, "No protocols match");
|
|
else
|
|
cli_msg(0, "");
|
|
}
|