conf/conf.c

   1 /*
   2  *      BIRD Internet Routing Daemon -- Configuration File Handling
   3  *
   4  *      (c) 1999 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #include <setjmp.h>
  10 #include <stdarg.h>
  11
  12 #include "nest/bird.h"
  13 #include "nest/route.h"
  14 #include "nest/protocol.h"
  15 #include "nest/iface.h"
  16 #include "lib/resource.h"
  17 #include "lib/string.h"
  18 #include "conf/conf.h"
  19 #include "filter/filter.h"
  20
  21 static jmp_buf conf_jmpbuf;
  22
  23 struct config *config, *new_config;
  24
  25 struct config *
  26 config_alloc(byte *name)
  27 {
  28   pool *p = rp_new(&root_pool, "Config");
  29   linpool *l = lp_new(p, 4080);
  30   struct config *c = lp_allocz(l, sizeof(struct config));
  31
  32   c->pool = p;
  33   cfg_mem = c->mem = l;
  34   c->file_name = cfg_strdup(name);
  35   return c;
  36 }
  37
  38 int
  39 config_parse(struct config *c)
  40 {
  41   debug("Parsing configuration file `%s'\n", c->file_name);
  42   new_config = c;
  43   cfg_mem = c->mem;
  44   if (setjmp(conf_jmpbuf))
  45     return 0;
  46   cf_lex_init(0);
  47   sysdep_preconfig(c);
  48   protos_preconfig(c);
  49   rt_preconfig(c);
  50   cf_parse();
  51   filters_postconfig();                 /* FIXME: Do we really need this? */
  52   protos_postconfig(c);
  53 #ifdef IPV6
  54   if (!c->router_id)
  55     cf_error("Router ID must be configured manually on IPv6 routers");
  56 #endif
  57   return 1;
  58 }
  59
  60 int
  61 cli_parse(struct config *c)
  62 {
  63   new_config = c;
  64   c->sym_fallback = config->sym_hash;
  65   cfg_mem = c->mem;
  66   if (setjmp(conf_jmpbuf))
  67     return 0;
  68   cf_lex_init(1);
  69   cf_parse();
  70   return 1;
  71 }
  72
  73 void
  74 config_free(struct config *c)
  75 {
  76   rfree(c->pool);
  77 }
  78
  79 void
  80 config_commit(struct config *c)
  81 {
  82   config = c;
  83   sysdep_commit(c);
  84   rt_commit(c);
  85   protos_commit(c);
  86 }
  87
  88 void
  89 cf_error(char *msg, ...)
  90 {
  91   char buf[1024];
  92   va_list args;
  93
  94   va_start(args, msg);
  95   if (bvsnprintf(buf, sizeof(buf), msg, args) < 0)
  96     strcpy(buf, "<bug: error message too long>");
  97   new_config->err_msg = cfg_strdup(buf);
  98   new_config->err_lino = conf_lino;
  99   longjmp(conf_jmpbuf, 1);
 100 }
 101
 102 char *
 103 cfg_strdup(char *c)
 104 {
 105   int l = strlen(c) + 1;
 106   char *z = cfg_allocu(l);
 107   memcpy(z, c, l);
 108   return z;
 109 }