discover: Add PXE parser

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

2 files changed, 80 insertions, 1 deletions

diff --git a/discover/Makefile.am b/discover/Makefile.am
index 8cbb0af..ce8cff5 100644
--- a/discover/Makefile.am
+++ b/discover/Makefile.am
@@ -32,7 +32,8 @@ libparser_o_SOURCES = \
 	resource.h \
 	kboot-parser.c \
 	grub2-parser.c \
-	yaboot-parser.c
+	yaboot-parser.c \
+	pxe-parser.c
 
 libparser.o: $(libparser_o_OBJECTS)
 	$(LD) -r -o $@ $^
diff --git a/discover/pxe-parser.c b/discover/pxe-parser.c
new file mode 100644
index 0000000..662716a
--- /dev/null
+++ b/discover/pxe-parser.c
@@ -0,0 +1,78 @@
+
+#include <string.h>
+
+#include <talloc/talloc.h>
+#include <url/url.h>
+
+#include "parser.h"
+#include "parser-conf.h"
+#include "parser-utils.h"
+#include "resource.h"
+
+static void pxe_finish(struct conf_context *conf)
+{
+	printf("%s\n", __func__);
+	discover_context_add_boot_option(conf->dc, conf->parser_info);
+}
+
+static void pxe_process_pair(struct conf_context *ctx,
+		const char *name, char *value)
+{
+	struct discover_boot_option *opt = ctx->parser_info;
+	struct pb_url *url;
+
+	if (streq(name, "LABEL")) {
+		if (opt)
+			pxe_finish(ctx);
+
+		opt = discover_boot_option_create(ctx->dc, ctx->dc->device);
+		ctx->parser_info = opt;
+
+		opt->option->device_id = ctx->dc->device->device->id;
+		opt->option->name = talloc_strdup(opt, value);
+		opt->option->id = talloc_asprintf(opt, "%s@%p",
+				opt->option->device_id, opt);
+		return;
+	}
+
+	/* all other parameters need an option */
+	if (!opt)
+		return;
+
+	if (streq(name, "KERNEL")) {
+		url = pb_url_join(ctx->dc, ctx->dc->conf_url, value);
+		opt->boot_image = create_url_resource(opt, url);
+
+	} else if (streq(name, "APPEND")) {
+		opt->option->boot_args = talloc_strdup(opt->option, value);
+		/* todo: initrd extraction */
+	}
+}
+
+static int pxe_parse(struct discover_context *dc, char *buf, int len)
+{
+	struct conf_context *conf;
+
+	conf = talloc_zero(dc, struct conf_context);
+
+	if (!conf)
+		return 0;
+
+	conf->dc = dc;
+	conf->get_pair = conf_get_pair_space;
+	conf->process_pair = pxe_process_pair;
+	conf->finish = pxe_finish;
+
+	conf_parse_buf(conf, buf, len);
+
+	talloc_free(conf);
+	return 1;
+}
+
+static struct parser pxe_parser = {
+	.name			= "pxe",
+	.parse			= pxe_parse,
+	.method			= CONF_METHOD_DHCP,
+};
+
+register_parser(pxe_parser);