+#include <fcntl.h>
#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
-#include "pb-protocol/pb-protocol.h"
+#include "types/types.h"
+#include <log/log.h>
+#include <talloc/talloc.h>
#include "device-handler.h"
-#include "log.h"
#include "parser.h"
#include "parser-utils.h"
+#include "paths.h"
-extern struct parser __start_parsers[], __stop_parsers[];
+struct p_item {
+ struct list_item list;
+ struct parser *parser;
+};
+
+STATIC_LIST(parsers);
+
+static const int max_file_size = 1024 * 1024;
-void iterate_parsers(struct discover_context *ctx)
+static int read_file(struct discover_context *ctx,
+ const char *filename, char **bufp, int *lenp)
{
- struct parser *parser;
+ struct stat statbuf;
+ int rc, fd, i, len;
+ char *buf;
- pb_log("trying parsers for %s\n", ctx->device_path);
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ rc = fstat(fd, &statbuf);
+ if (rc < 0)
+ goto err_close;
+
+ len = statbuf.st_size;
+ if (len > max_file_size)
+ goto err_close;
+
+ buf = talloc_array(ctx, char, len + 1);
+ if (!buf)
+ goto err_close;
+
+ for (i = 0; i < len; i += rc) {
+ rc = read(fd, buf + i, len - i);
+
+ /* unexpected EOF: trim and return */
+ if (rc == 0) {
+ len = i;
+ break;
+ }
+
+ if (rc < 0)
+ goto err_free;
- for (parser = __start_parsers; parser < __stop_parsers; parser++) {
- pb_log("\ttrying parser '%s'\n", parser->name);
- /* just use a dummy device path for now */
- if (parser->parse(ctx))
- return;
}
- pb_log("\tno boot_options found\n");
+
+ buf[len] = '\0';
+
+ close(fd);
+ *bufp = buf;
+ *lenp = len;
+ return 0;
+
+err_free:
+ talloc_free(buf);
+err_close:
+ close(fd);
+ return -1;
}
-static int compare_parsers(const void *a, const void *b)
+static char *local_path(struct discover_context *ctx,
+ const char *filename)
{
- const struct parser *parser_a = a, *parser_b = b;
+ return join_paths(ctx, ctx->device->mount_path, filename);
+}
- if (parser_a->priority > parser_b->priority)
+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;
- if (parser_a->priority < parser_b->priority)
- 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)
+{
+ const char * const *filename;
+ const char *path;
+
+ if (!parser->filenames)
+ return;
+
+ for (filename = parser->filenames; *filename; filename++) {
+ int rc, len;
+ char *buf;
+
+ path = local_path(ctx, *filename);
+ if (!path)
+ continue;
+
+ rc = read_file(ctx, path, &buf, &len);
+ if (!rc) {
+ pb_log("Running parser %s on file %s\n",
+ parser->name, *filename);
+ parser->parse(ctx, buf, len);
+ talloc_free(buf);
+ }
+ }
+}
+
+void iterate_parsers(struct discover_context *ctx, enum conf_method method)
+{
+ struct p_item* i;
+ int rc, len;
+ char *buf;
+
+ pb_log("trying parsers for %s\n", ctx->device->device->id);
+
+ switch (method) {
+ case CONF_METHOD_LOCAL_FILE:
+ list_for_each_entry(&parsers, i, list) {
+ if (i->parser->method != CONF_METHOD_LOCAL_FILE)
+ continue;
+
+ pb_log("\ttrying parser '%s'\n", i->parser->name);
+ ctx->parser = i->parser;
+ iterate_parser_files(ctx, ctx->parser);
+ }
+ ctx->parser = NULL;
+ break;
+
+ case CONF_METHOD_DHCP:
+ rc = download_config(ctx, &buf, &len);
+ if (rc) {
+ pb_log("\tdownload failed, aborting\n");
+ return;
+ }
+
+ list_for_each_entry(&parsers, i, list) {
+ if (i->parser->method != method)
+ continue;
+
+ pb_log("\ttrying parser '%s'\n", i->parser->name);
+ ctx->parser = i->parser;
+ i->parser->parse(ctx, buf, len);
+ }
+
+ break;
+
+ case CONF_METHOD_UNKNOWN:
+ break;
+
+ }
+}
+
+void __register_parser(struct parser *parser)
+{
+ struct p_item* i = talloc(NULL, struct p_item);
+
+ i->parser = parser;
+ list_add(&parsers, &i->list);
}
void parser_init(void)
{
- /* sort our parsers into descending priority order */
- qsort(__start_parsers, __stop_parsers - __start_parsers,
- sizeof(struct parser), compare_parsers);
}