discover: Add configuration events & DHCP handler

[petitboot] / discover / parser.c

diff --git a/discover/parser.c b/discover/parser.c
index 462d614a5c1abeae1866a79f3748428fc956e9ec..42ee2e55c9a0f352949e26551abc5c344bd1d84a 100644 (file)
--- a/discover/parser.c
+++ b/discover/parser.c
@@ -13,18 +13,8 @@
 #include "parser-utils.h"
 #include "paths.h"
 
-struct parser __grub2_parser;
-struct parser __kboot_parser;
-struct parser __native_parser;
-struct parser __yaboot_parser;
-
-static const struct parser *const parsers[] = {
-//     &__native_parser,
-       &__kboot_parser,
-       &__grub2_parser,
-       &__yaboot_parser,
-       NULL
-};
+static int n_parsers;
+static struct parser **parsers;
 
 static const int max_file_size = 1024 * 1024;
 
@@ -83,6 +73,28 @@ static char *local_path(struct discover_context *ctx,
        return join_paths(ctx, ctx->device->mount_path, filename);
 }
 
+static int download_config(struct discover_context *ctx, char **buf, int *len)
+{
+       unsigned tempfile;
+       const char *file;
+       int rc;
+
+       file = load_url(ctx, ctx->conf_url, &tempfile);
+       if (!file)
+               return -1;
+
+       rc = read_file(ctx, file, buf, len);
+       if (rc)
+               goto out_clean;
+
+       return 0;
+
+out_clean:
+       if (tempfile)
+               unlink(file);
+       return -1;
+}
+
 static void iterate_parser_files(struct discover_context *ctx,
                const struct parser *parser)
 {
@@ -108,18 +120,55 @@ static void iterate_parser_files(struct discover_context *ctx,
        }
 }
 
-void iterate_parsers(struct discover_context *ctx)
+void iterate_parsers(struct discover_context *ctx, enum conf_method method)
 {
-       int i;
+       int rc, i, len;
+       char *buf;
 
        pb_log("trying parsers for %s\n", ctx->device->device->id);
 
-       for (i = 0; parsers[i]; i++) {
-               pb_log("\ttrying parser '%s'\n", parsers[i]->name);
-               iterate_parser_files(ctx, parsers[i]);
+       switch (method) {
+       case CONF_METHOD_LOCAL_FILE:
+               for (i = 0; i < n_parsers; i++) {
+                       if (parsers[i]->method != CONF_METHOD_LOCAL_FILE)
+                               continue;
+
+                       pb_log("\ttrying parser '%s'\n", parsers[i]->name);
+                       ctx->parser = parsers[i];
+                       iterate_parser_files(ctx, ctx->parser);
+               }
+               ctx->parser = NULL;
+               break;
+
+       case CONF_METHOD_DHCP:
+               rc = download_config(ctx, &buf, &len);
+               if (rc)
+                       return;
+
+               for (i = 0; i < n_parsers; i++) {
+                       if (parsers[i]->method != method)
+                               continue;
+
+                       pb_log("\ttrying parser '%s'\n", parsers[i]->name);
+                       ctx->parser = parsers[i];
+                       parsers[i]->parse(ctx, buf, len);
+               }
+
+               break;
+
+       case CONF_METHOD_UNKNOWN:
+               break;
+
        }
 }
 
+void __register_parser(struct parser *parser)
+{
+       parsers = talloc_realloc(NULL, parsers, struct parser *, n_parsers + 1);
+       parsers[n_parsers] = parser;
+       n_parsers++;
+}
+
 void parser_init(void)
 {
 }