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bird 1.6.3

    1: /*
    2:  *	BIRD -- UNIX Kernel Route Syncer
    3:  *
    4:  *	(c) 1998--2000 Martin Mares <mj@ucw.cz>
    5:  *
    6:  *	Can be freely distributed and used under the terms of the GNU GPL.
    7:  */
    8: 
    9: #ifndef _BIRD_KRT_H_
   10: #define _BIRD_KRT_H_
   11: 
   12: struct config;
   13: struct krt_config;
   14: struct krt_proto;
   15: struct kif_config;
   16: struct kif_proto;
   17: 
   18: #include "lib/krt-sys.h"
   19: 
   20: /* Flags stored in net->n.flags, rest are in nest/route.h */
   21: 
   22: #define KRF_VERDICT_MASK 0x0f
   23: #define KRF_CREATE 0			/* Not seen in kernel table */
   24: #define KRF_SEEN 1			/* Seen in kernel table during last scan */
   25: #define KRF_UPDATE 2			/* Need to update this entry */
   26: #define KRF_DELETE 3			/* Should be deleted */
   27: #define KRF_IGNORE 4			/* To be ignored */
   28: 
   29: #define KRT_DEFAULT_ECMP_LIMIT	16
   30: 
   31: #define EA_KRT_SOURCE	EA_CODE(EAP_KRT, 0)
   32: #define EA_KRT_METRIC	EA_CODE(EAP_KRT, 1)
   33: 
   34: /* Whenever we recognize our own routes, we allow learing of foreign routes */
   35: 
   36: #ifdef CONFIG_SELF_CONSCIOUS
   37: #define KRT_ALLOW_LEARN
   38: #endif
   39: 
   40: /* krt.c */
   41: 
   42: extern struct protocol proto_unix_kernel;
   43: 
   44: struct krt_config {
   45:   struct proto_config c;
   46:   struct krt_params sys;	/* Sysdep params */
   47:   int persist;			/* Keep routes when we exit */
   48:   int scan_time;		/* How often we re-scan routes */
   49:   int learn;			/* Learn routes from other sources */
   50:   int devroutes;		/* Allow export of device routes */
   51:   int graceful_restart;		/* Regard graceful restart recovery */
   52:   int merge_paths;		/* Exported routes are merged for ECMP */
   53: };
   54: 
   55: struct krt_proto {
   56:   struct proto p;
   57:   struct krt_state sys;		/* Sysdep state */
   58: 
   59: #ifdef KRT_ALLOW_LEARN
   60:   struct rtable krt_table;	/* Internal table of inherited routes */
   61: #endif
   62: 
   63: #ifndef CONFIG_ALL_TABLES_AT_ONCE
   64:   timer *scan_timer;
   65: #endif
   66: 
   67:   node krt_node;		/* Node in krt_proto_list */
   68:   byte ready;			/* Initial feed has been finished */
   69:   byte initialized;		/* First scan has been finished */
   70:   byte reload;			/* Next scan is doing reload */
   71: };
   72: 
   73: extern pool *krt_pool;
   74: 
   75: #define KRT_CF ((struct krt_config *)p->p.cf)
   76: 
   77: #define KRT_TRACE(pr, fl, msg, args...) do {	\
   78:   DBG("KRT: " msg "\n" , ## args);		\
   79:   if (pr->p.debug & fl)				\
   80:     { log(L_TRACE "%s: " msg, pr->p.name , ## args); } } while(0)
   81: 
   82: struct proto_config * kif_init_config(int class);
   83: void kif_request_scan(void);
   84: void krt_got_route(struct krt_proto *p, struct rte *e);
   85: void krt_got_route_async(struct krt_proto *p, struct rte *e, int new);
   86: 
   87: /* Values for rte->u.krt_sync.src */
   88: #define KRT_SRC_UNKNOWN	-1	/* Nobody knows */
   89: #define KRT_SRC_BIRD	 0	/* Our route (not passed in async mode) */
   90: #define KRT_SRC_REDIRECT 1	/* Redirect route, delete it */
   91: #define KRT_SRC_ALIEN	 2	/* Route installed by someone else */
   92: #define KRT_SRC_KERNEL	 3	/* Kernel routes, are ignored by krt syncer */
   93: 
   94: extern struct protocol proto_unix_iface;
   95: 
   96: struct kif_primary_item {
   97:   node n;
   98:   byte *pattern;
   99:   ip_addr prefix;
  100:   int pxlen;
  101: };
  102: 
  103: struct kif_config {
  104:   struct proto_config c;
  105:   struct kif_params sys;	/* Sysdep params */
  106:   int scan_time;		/* How often we re-scan interfaces */
  107:   list primary;			/* Preferences for primary addresses (struct kif_primary_item) */
  108: };
  109: 
  110: struct kif_proto {
  111:   struct proto p;
  112:   struct kif_state sys;		/* Sysdep state */
  113: };
  114: 
  115: struct kif_proto *kif_proto;
  116: 
  117: #define KIF_CF ((struct kif_config *)p->p.cf)
  118: 
  119: struct proto_config * krt_init_config(int class);
  120: 
  121: 
  122: /* krt sysdep */
  123: 
  124: void krt_sys_io_init(void);
  125: void krt_sys_init(struct krt_proto *);
  126: int krt_sys_start(struct krt_proto *);
  127: void krt_sys_shutdown(struct krt_proto *);
  128: int krt_sys_reconfigure(struct krt_proto *p UNUSED, struct krt_config *n, struct krt_config *o);
  129: 
  130: void krt_sys_preconfig(struct config *);
  131: void krt_sys_postconfig(struct krt_config *);
  132: void krt_sys_init_config(struct krt_config *);
  133: void krt_sys_copy_config(struct krt_config *, struct krt_config *);
  134: 
  135: int  krt_capable(rte *e);
  136: void krt_do_scan(struct krt_proto *);
  137: void krt_replace_rte(struct krt_proto *p, net *n, rte *new, rte *old, struct ea_list *eattrs);
  138: int krt_sys_get_attr(eattr *a, byte *buf, int buflen);
  139: 
  140: 
  141: /* kif sysdep */
  142: 
  143: void kif_sys_init(struct kif_proto *);
  144: void kif_sys_start(struct kif_proto *);
  145: void kif_sys_shutdown(struct kif_proto *);
  146: int kif_sys_reconfigure(struct kif_proto *, struct kif_config *, struct kif_config *);
  147: 
  148: void kif_sys_init_config(struct kif_config *);
  149: void kif_sys_copy_config(struct kif_config *, struct kif_config *);
  150: 
  151: void kif_do_scan(struct kif_proto *);
  152: 
  153: struct ifa *kif_get_primary_ip(struct iface *i);
  154: 
  155: #endif