Implemented new configuration/reconfiguration interface and defined protocol

state machines. Full explanation will follow soon.

4 files changed, 130 insertions, 43 deletions

diff --git a/conf/Makefile b/conf/Makefile
index 270d556..fdcd4c3 100644
--- a/conf/Makefile
+++ b/conf/Makefile
@@ -1,4 +1,4 @@
-source=cf-parse.tab.c cf-lex.c
+source=cf-parse.tab.c cf-lex.c conf.c
 root-rel=../
 
 include ../Rules
diff --git a/conf/cf-lex.l b/conf/cf-lex.l
index 81e3b6a..791d4ad 100644
--- a/conf/cf-lex.l
+++ b/conf/cf-lex.l
@@ -1,7 +1,7 @@
 /*
  *	BIRD -- Configuration Lexer
  *
- *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *	(c) 1998--1999 Martin Mares <mj@ucw.cz>
  *
  *	Can be freely distributed and used under the terms of the GNU GPL.
  */
@@ -15,7 +15,6 @@
 #include <stdarg.h>
 
 #include "nest/bird.h"
-#include "lib/string.h"
 #include "conf/conf.h"
 #include "conf/cf-parse.tab.h"
 
@@ -34,9 +33,10 @@ static struct keyword {
 static struct keyword *kw_hash[KW_HASH_SIZE];
 static struct symbol **sym_hash;
 static int allow_new_symbols;
-static int cf_lino;
 static int default_counter;
 
+int conf_lino;
+
 static int cf_hash(byte *c);
 static struct symbol *cf_find_sym(byte *c, unsigned int h0);
 
@@ -121,11 +121,11 @@ WHITE [ \t]
 {WHITE}+
 
 \\\n {
-  cf_lino++;
+  conf_lino++;
 }
 
 \n {
-  cf_lino++;
+  conf_lino++;
   return ';';
 }
 
@@ -136,14 +136,14 @@ WHITE [ \t]
 .	cf_error("Unknown character");
 
 <COMMENT>\n {
-  cf_lino++;
+  conf_lino++;
   BEGIN(INITIAL);
 }
 
 <COMMENT>.
 
 <CCOMM>\*\/	BEGIN(INITIAL);
-<CCOMM>\n	cf_lino++;
+<CCOMM>\n	conf_lino++;
 <CCOMM>\/\*	cf_error("Comment nesting not supported");
 <CCOMM><<EOF>>	cf_error("Unterminated comment");
 <CCOMM>.
@@ -206,7 +206,7 @@ cf_lex_init(int flag)
 {
   if (allow_new_symbols = flag)
     sym_hash = cfg_allocz(SYM_HASH_SIZE * sizeof(struct keyword *));
-  cf_lino = 1;
+  conf_lino = 1;
   default_counter = 1;
 }
 
@@ -222,34 +222,3 @@ cf_lex_init_tables(void)
       kw_hash[h] = k;
     }
 }
-
-void
-cf_error(char *msg, ...)
-{
-  /* FIXME */
-
-  char buf[1024];
-  va_list args;
-
-  va_start(args, msg);
-  bvsprintf(buf, msg, args);
-  die(PATH_CONFIG ", line %d: %s", cf_lino, buf);
-}
-
-void
-cf_allocate(void)
-{
-  if (cfg_pool)
-    rfree(cfg_pool);
-  cfg_pool = rp_new(&root_pool, "Config");
-  cfg_mem = lp_new(cfg_pool, 1024);
-}
-
-char *
-cfg_strdup(char *c)
-{
-  int l = strlen(c) + 1;
-  char *z = cfg_allocu(l);
-  memcpy(z, c, l);
-  return z;
-}
diff --git a/conf/conf.c b/conf/conf.c
new file mode 100644
index 0000000..06cd3d1
--- /dev/null
+++ b/conf/conf.c
@@ -0,0 +1,96 @@
+/*
+ *	BIRD Internet Routing Daemon -- Configuration File Handling
+ *
+ *	(c) 1999 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include <setjmp.h>
+#include <stdarg.h>
+
+#include "nest/bird.h"
+#include "nest/protocol.h"
+#include "nest/iface.h"
+#include "lib/resource.h"
+#include "lib/string.h"
+#include "conf/conf.h"
+#include "filter/filter.h"
+
+static jmp_buf conf_jmpbuf;
+
+struct config *config, *new_config;
+
+struct config *
+config_alloc(byte *name)
+{
+  pool *p = rp_new(&root_pool, "Config");
+  linpool *l = lp_new(p, 1024);
+  struct config *c = lp_allocz(l, sizeof(struct config));
+
+  c->pool = p;
+  cfg_mem = c->mem = l;
+  init_list(&c->protos);
+  c->file_name = cfg_strdup(name);
+  return c;
+}
+
+int
+config_parse(struct config *c)
+{
+  struct proto_config *p;
+
+  debug("Parsing configuration file <%s>\n", c->file_name);
+  new_config = c;
+  cfg_pool = c->pool;
+  cfg_mem = c->mem;
+  if (setjmp(conf_jmpbuf))
+    return 0;
+  cf_lex_init(1);
+  cf_lex_init_tables();
+  protos_preconfig(c);
+  cf_parse();
+#if 0					/* FIXME: We don't have interface list yet :( */
+  if (!c->router_id && !(c->router_id = auto_router_id()))
+    cf_error("Cannot determine router ID (no suitable network interface found), please configure it manually");
+#endif
+  filters_postconfig();			/* FIXME: Do we really need this? */
+  protos_postconfig(c);
+  return 1;
+}
+
+void
+config_free(struct config *c)
+{
+  rfree(c->pool);
+}
+
+void
+config_commit(struct config *c)
+{
+  config = c;
+  protos_commit(c);
+}
+
+void
+cf_error(char *msg, ...)
+{
+  char buf[1024];
+  va_list args;
+
+  va_start(args, msg);
+  if (bvsnprintf(buf, sizeof(buf), msg, args) < 0)
+    strcpy(buf, "<bug: error message too long>");
+  new_config->err_msg = cfg_strdup(buf);
+  new_config->err_lino = conf_lino;
+  longjmp(conf_jmpbuf, 1);
+}
+
+char *
+cfg_strdup(char *c)
+{
+  int l = strlen(c) + 1;
+  char *z = cfg_allocu(l);
+  memcpy(z, c, l);
+  return z;
+}
diff --git a/conf/conf.h b/conf/conf.h
index 19ed34e..54f5d5e 100644
--- a/conf/conf.h
+++ b/conf/conf.h
@@ -1,7 +1,7 @@
 /*
  *	BIRD Internet Routing Daemon -- Configuration File Handling
  *
- *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *	(c) 1998--1999 Martin Mares <mj@ucw.cz>
  *
  *	Can be freely distributed and used under the terms of the GNU GPL.
  */
@@ -11,6 +11,28 @@
 
 #include "lib/resource.h"
 
+/* Configuration structure */
+
+struct config {
+  pool *pool;				/* Pool the configuration is stored in */
+  linpool *mem;				/* Linear pool containing configuration data */
+  list protos;				/* Configured protocol instances (struct proto_config) */
+  u32 router_id;			/* Our Router ID */
+  u16 this_as;				/* Our Autonomous System Number */
+  char *err_msg;			/* Parser error message */
+  int err_lino;				/* Line containing error */
+  char *file_name;			/* Name of configuration file */
+};
+
+extern struct config *config, *new_config;
+/* Please don't use these variables in protocols. Use proto_config->global instead. */
+
+struct config *config_alloc(byte *name);
+int config_parse(struct config *);
+void config_free(struct config *);
+void config_commit(struct config *);
+void cf_error(char *msg, ...) NORET;
+
 /* Pools */
 
 extern pool *cfg_pool;
@@ -41,11 +63,11 @@ struct symbol {
 #define SYM_FUNCTION 5
 #define SYM_FILTER 6
 
+extern int conf_lino;
+
 void cf_lex_init_tables(void);
 int cf_lex(void);
 void cf_lex_init(int flag);
-void cf_error(char *msg, ...) NORET;
-void cf_allocate(void);
 struct symbol *cf_default_name(char *prefix);
 
 /* Parser */