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https://gitlab.nic.cz/labs/bird.git
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1e4891e48e
If an interface address notification is received during device protocol shutdown/restart, BIRD crashed. Thanks to Wei Huang for the bugreport.
156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/*
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* BIRD -- UNIX Kernel Route Syncer
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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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#ifndef _BIRD_KRT_H_
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#define _BIRD_KRT_H_
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struct config;
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struct krt_config;
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struct krt_proto;
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struct kif_config;
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struct kif_proto;
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#include "lib/krt-sys.h"
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/* Flags stored in net->n.flags, rest are in nest/route.h */
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#define KRF_VERDICT_MASK 0x0f
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#define KRF_CREATE 0 /* Not seen in kernel table */
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#define KRF_SEEN 1 /* Seen in kernel table during last scan */
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#define KRF_UPDATE 2 /* Need to update this entry */
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#define KRF_DELETE 3 /* Should be deleted */
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#define KRF_IGNORE 4 /* To be ignored */
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#define KRT_DEFAULT_ECMP_LIMIT 16
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#define EA_KRT_SOURCE EA_CODE(EAP_KRT, 0)
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#define EA_KRT_METRIC EA_CODE(EAP_KRT, 1)
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/* Whenever we recognize our own routes, we allow learing of foreign routes */
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#ifdef CONFIG_SELF_CONSCIOUS
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#define KRT_ALLOW_LEARN
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#endif
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/* krt.c */
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extern struct protocol proto_unix_kernel;
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struct krt_config {
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struct proto_config c;
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struct krt_params sys; /* Sysdep params */
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int persist; /* Keep routes when we exit */
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int scan_time; /* How often we re-scan routes */
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int learn; /* Learn routes from other sources */
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int devroutes; /* Allow export of device routes */
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int graceful_restart; /* Regard graceful restart recovery */
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int merge_paths; /* Exported routes are merged for ECMP */
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};
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struct krt_proto {
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struct proto p;
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struct krt_state sys; /* Sysdep state */
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#ifdef KRT_ALLOW_LEARN
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struct rtable krt_table; /* Internal table of inherited routes */
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#endif
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#ifndef CONFIG_ALL_TABLES_AT_ONCE
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timer *scan_timer;
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#endif
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node krt_node; /* Node in krt_proto_list */
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byte ready; /* Initial feed has been finished */
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byte initialized; /* First scan has been finished */
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byte reload; /* Next scan is doing reload */
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};
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extern pool *krt_pool;
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#define KRT_CF ((struct krt_config *)p->p.cf)
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#define KRT_TRACE(pr, fl, msg, args...) do { \
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DBG("KRT: " msg "\n" , ## args); \
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if (pr->p.debug & fl) \
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{ log(L_TRACE "%s: " msg, pr->p.name , ## args); } } while(0)
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struct proto_config * kif_init_config(int class);
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void kif_request_scan(void);
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void krt_got_route(struct krt_proto *p, struct rte *e);
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void krt_got_route_async(struct krt_proto *p, struct rte *e, int new);
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/* Values for rte->u.krt_sync.src */
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#define KRT_SRC_UNKNOWN -1 /* Nobody knows */
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#define KRT_SRC_BIRD 0 /* Our route (not passed in async mode) */
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#define KRT_SRC_REDIRECT 1 /* Redirect route, delete it */
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#define KRT_SRC_ALIEN 2 /* Route installed by someone else */
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#define KRT_SRC_KERNEL 3 /* Kernel routes, are ignored by krt syncer */
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extern struct protocol proto_unix_iface;
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struct kif_primary_item {
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node n;
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byte *pattern;
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ip_addr prefix;
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int pxlen;
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};
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struct kif_config {
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struct proto_config c;
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struct kif_params sys; /* Sysdep params */
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int scan_time; /* How often we re-scan interfaces */
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list primary; /* Preferences for primary addresses (struct kif_primary_item) */
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};
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struct kif_proto {
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struct proto p;
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struct kif_state sys; /* Sysdep state */
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};
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struct kif_proto *kif_proto;
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#define KIF_CF ((struct kif_config *)p->p.cf)
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struct proto_config * krt_init_config(int class);
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/* krt sysdep */
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void krt_sys_io_init(void);
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void krt_sys_init(struct krt_proto *);
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int krt_sys_start(struct krt_proto *);
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void krt_sys_shutdown(struct krt_proto *);
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int krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n, struct krt_config *o);
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void krt_sys_preconfig(struct config *);
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void krt_sys_postconfig(struct krt_config *);
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void krt_sys_init_config(struct krt_config *);
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void krt_sys_copy_config(struct krt_config *, struct krt_config *);
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int krt_capable(rte *e);
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void krt_do_scan(struct krt_proto *);
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void krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs);
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int krt_sys_get_attr(eattr *a, byte *buf, int buflen);
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/* kif sysdep */
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void kif_sys_init(struct kif_proto *);
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void kif_sys_start(struct kif_proto *);
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void kif_sys_shutdown(struct kif_proto *);
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int kif_sys_reconfigure(struct kif_proto *, struct kif_config *, struct kif_config *);
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void kif_sys_init_config(struct kif_config *);
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void kif_sys_copy_config(struct kif_config *, struct kif_config *);
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void kif_do_scan(struct kif_proto *);
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struct ifa *kif_get_primary_ip(struct iface *i);
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#endif
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