#include <file/file.h>
#include <i18n/i18n.h>
+#include "device-handler.h"
#include "parser.h"
#include "parser-conf.h"
#include "parser-utils.h"
static const char *pxelinux_prefix = "pxelinux.cfg/";
+static void pxe_conf_parse_cb(struct load_url_result *result, void *data);
+
struct pxe_parser_info {
- struct discover_boot_option *opt;
- const char *default_name;
+ struct discover_boot_option *opt;
+ const char *default_name;
+ char **pxe_conf_files;
+ struct pb_url *pxe_base_url;
+ int current;
+ char *proxy;
};
static void pxe_finish(struct conf_context *conf)
{
struct pxe_parser_info *info = conf->parser_info;
- if (info->opt)
+ if (info->opt) {
+ if (info->proxy)
+ info->opt->proxy = talloc_strdup(info->opt, info->proxy);
discover_context_add_boot_option(conf->dc, info->opt);
+ info->opt = NULL;
+ }
}
/* We need a slightly modified version of pb_url_join, to allow for the
return;
if (val & 0x2) {
- uint8_t *mac = find_mac_by_name(ctx, ctx->network,
- event->device);
+ uint8_t *mac = find_mac_by_name(ctx,
+ device_handler_get_network(ctx->handler),
+ event->device);
str = pxe_sysappend_mac(ctx, mac);
if (str) {
pxe_append_string(opt, str);
return;
}
- if (streq(name, "LABEL")) {
+ if (streq(name, "PROXY")) {
+ if (parser_info->proxy)
+ talloc_free(parser_info->proxy);
+
+ parser_info->proxy = talloc_strdup(parser_info, value);
+ return;
+ }
+
+ if (streq(name, "LABEL") || streq(name, "PLUGIN")) {
if (opt)
pxe_finish(ctx);
opt->option->id = talloc_asprintf(opt, "%s@%p",
ctx->dc->device->device->id, opt);
- opt->option->is_default = parser_info->default_name &&
- streq(parser_info->default_name, value);
+ if (streq(name, "LABEL")) {
+ opt->option->type = DISCOVER_BOOT_OPTION;
+ opt->option->is_default = parser_info->default_name &&
+ streq(parser_info->default_name, value);
+ } else
+ opt->option->type = DISCOVER_PLUGIN_OPTION;
parser_info->opt = opt;
return;
if (!opt)
return;
+ if (streq(name, "TARBALL") &&
+ opt->option->type == DISCOVER_PLUGIN_OPTION) {
+ url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
+ opt->boot_image = create_url_resource(opt, url);
+ /* All other options apply to boot options only */
+ return;
+ }
+
if (streq(name, "KERNEL")) {
url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
opt->boot_image = create_url_resource(opt, url);
url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
opt->dtb = create_url_resource(opt, url);
}
+}
+
+static void pxe_load_next_filename(struct conf_context *conf)
+{
+ struct pxe_parser_info *info = conf->parser_info;
+ struct pb_url *url;
+
+ if (!info->pxe_conf_files)
+ return;
+
+ for (; info->pxe_conf_files[info->current]; info->current++) {
+ url = pb_url_join(conf->dc, info->pxe_base_url,
+ info->pxe_conf_files[info->current]);
+ if (!url)
+ continue;
+
+ if (load_url_async(conf, url, pxe_conf_parse_cb, conf,
+ NULL, NULL))
+ break;
+ }
+
+ return;
+}
+
+/*
+ * Parse a limited set of iPXE commands. This is handled separately from
+ * conf_parse_buf() since not all commands will have a value.
+ */
+static bool ipxe_simple_parser(struct conf_context *ctx, char *buf, int len)
+{
+ struct discover_boot_option *opt;
+ char *p, *name, *value;
+ struct pb_url *url;
+
+ p = strstr(buf, "#!ipxe");
+
+ /* Only try to parse this if the ipxe header is right at the start */
+ if (!p || p != buf)
+ return false;
+ p = strchr(buf, '\n') + 1;
+
+ opt = discover_boot_option_create(ctx->dc, ctx->dc->device);
+
+ opt->option->id = talloc_asprintf(opt, "%s@%p",
+ ctx->dc->device->device->id, opt);
+ opt->option->type = DISCOVER_BOOT_OPTION;
+
+ while (p && p <= buf + len) {
+
+ p = conf_get_pair(ctx, p, &name, &value, ' ', '\n');
+
+ /* The 'boot' command appears by itself without options */
+ if (!name && value && streq(value, "boot")) {
+ opt->option->is_default = true;
+ continue;
+ }
+
+ /* All other parameters require a value */
+ if (!value) {
+ pb_debug("%s: '%s' missing value\n", __func__, name);
+ continue;
+ }
+
+ if (streq(name, "kernel")) {
+ char *args, *name = NULL, *saveptr = NULL, *tmp;
+
+ /*
+ * value is of the form:
+ * boot_image [--name option_name ] [option args ...]
+ */
+ tmp = strtok_r(value, " ", &saveptr);
+ if (!tmp) {
+ pb_log("%s: malformed kernel statement\n", __func__);
+ break;
+ }
+
+ url = pxe_url_join(ctx->dc, ctx->dc->conf_url, tmp);
+ opt->boot_image = create_url_resource(opt, url);
+
+ tmp = strtok_r(NULL, " ", &saveptr);
+ if (!tmp)
+ continue;
+ if (streq(tmp, "--name")) {
+ tmp = strtok_r(NULL, " ", &saveptr);
+ name = talloc_asprintf(opt, "%s",
+ tmp ?: "malformed ipxe option");
+ args = strtok_r(NULL, " ", &saveptr);
+ } else
+ args = tmp;
+
+ while (args) {
+ pxe_append_string(opt, args);
+ args = strtok_r(NULL, " ", &saveptr);
+ }
+
+ opt->option->name = name ?: talloc_asprintf(opt,
+ "ipxe option (%s)", url->full);
+ continue;
+ }
+
+ if (streq(name, "initrd")) {
+ url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
+ opt->initrd = create_url_resource(opt, url);
+ continue;
+ }
+ }
+
+ if (opt->boot_image)
+ discover_context_add_boot_option(ctx->dc, opt);
+ else
+ pb_debug("ipxe file did not contain a valid option\n");
+ return true;
}
/*
{
struct conf_context *conf = data;
struct device_handler *handler;
- struct boot_status status = {0};
+ struct pxe_parser_info *info;
char *buf = NULL;
- int len, rc;
+ int len, rc = 0;
if (!data)
return;
+ if (!result)
+ goto out_clean;
- if (!result || result->status != LOAD_OK) {
- talloc_free(conf);
- return;
- }
+ handler = talloc_parent(conf);
- rc = read_file(conf, result->local, &buf, &len);
- if (rc) {
- pb_log("Read failed during pxe callback for %s\n", result->local);
- goto out_clean;
+ if (result->status == LOAD_OK)
+ rc = read_file(conf, result->local, &buf, &len);
+ if (result->status != LOAD_OK || rc) {
+ /* This load failed so try the next available filename */
+ info = conf->parser_info;
+ if (!info->pxe_conf_files) {
+ device_handler_status_dev_err(handler,
+ conf->dc->device,
+ _("Failed to download %s"),
+ pb_url_to_string(result->url));
+
+ return;
+ }
+
+ info->current++;
+ pxe_load_next_filename(conf);
+ if (info->pxe_conf_files[info->current] == NULL) {
+ /* Nothing left to try */
+ device_handler_status_dev_err(handler,
+ conf->dc->device,
+ _("PXE autoconfiguration failed"));
+ goto out_clean;
+ }
+ return;
}
- conf_parse_buf(conf, buf, len);
+ /*
+ * Parse the first successfully downloaded file. We only want to parse
+ * the first because otherwise we could parse options from both a
+ * machine-specific config and a 'fallback' default config
+ * We also check if the file is in the limited ipxe format.
+ */
+ if (!ipxe_simple_parser(conf, buf, len))
+ conf_parse_buf(conf, buf, len);
/* We may be called well after the original caller of iterate_parsers(),
* commit any new boot options ourselves */
- handler = talloc_parent(conf);
device_handler_discover_context_commit(handler, conf->dc);
- status.type = BOOT_STATUS_INFO;
/*
- * TRANSLATORS: the format specifier in this string in an IP address,
- * eg. 192.168.1.1
+ * TRANSLATORS: the format specifier in this string is a URL
+ * eg. tftp://192.168.1.1/pxelinux.cfg
*/
- status.message = talloc_asprintf(conf, _("pxe: parsed config for %s"),
- conf->dc->conf_url->host);
- device_handler_boot_status(handler, &status);
+ device_handler_status_dev_info(handler, conf->dc->device,
+ _("Parsed PXE config from %s"),
+ pb_url_to_string(result->url));
talloc_free(buf);
out_clean:
- if (result->cleanup_local)
+ if (result && result->cleanup_local)
unlink(result->local);
talloc_free(conf);
}
static int pxe_parse(struct discover_context *dc)
{
- struct pb_url *pxe_base_url, *url;
- char **pxe_conf_files, **filename;
+ struct pb_url *pxe_base_url, *file_url;
struct conf_context *conf = NULL;
struct load_url_result *result;
void *ctx = talloc_parent(dc);
+ struct pxe_parser_info *info;
+ char **pxe_conf_files;
bool complete_url;
/* Expects dhcp event parameters to support network boot */
* Retrieving PXE configs over the network can take some time depending
* on factors such as slow network, malformed paths, bad DNS, and
* overzealous firewalls. Instead of blocking the discover server while
- * we wait for these, spawn an asynchronous job for each URL we can
- * parse and process the resulting files in a callback. A separate
- * conf_context is created for each job.
+ * we wait for these, spawn an asynchronous job that will attempt to
+ * retrieve each possible URL until it successfully finds one, and
+ * parse and process the resulting file in a callback.
*/
conf = copy_context(ctx, dc);
if (!conf)
return -1;
if (complete_url) {
+ /* Check if this file has already been downloaded */
+ if (event_get_param(dc->event, "pxeconffile-local"))
+ file_url = pb_url_parse(dc, event_get_param(dc->event,
+ "pxeconffile-local"));
+ else
+ file_url = dc->conf_url;
+
+ if (!file_url) {
+ pb_log_fn("Failed to parse conf url!\n");
+ goto out_conf;
+ }
+
+ device_handler_status_dev_info(conf->dc->handler,
+ dc->device,
+ _("Requesting config %s"),
+ pb_url_to_string(conf->dc->conf_url));
+
/* we have a complete URL; use this and we're done. */
- result = load_url_async(conf->dc, conf->dc->conf_url,
- pxe_conf_parse_cb, conf);
+ result = load_url_async(conf->dc, file_url,
+ pxe_conf_parse_cb, conf, NULL, ctx);
if (!result) {
pb_log("load_url_async fails for %s\n",
dc->conf_url->path);
if (!pxe_base_url)
goto out_pxe_conf;
- for (filename = pxe_conf_files; *filename; filename++) {
- if (!conf) {
- conf = copy_context(ctx, dc);
- }
- url = pb_url_join(conf->dc, pxe_base_url, *filename);
- if (!url)
- continue;
- result = load_url_async(conf, url, pxe_conf_parse_cb,
- conf);
- if (!result) {
- pb_log("load_url_async fails for %s\n",
- conf->dc->conf_url->path);
- talloc_free(conf);
- }
- /* conf now needed by callback, don't reuse */
- conf = NULL;
- }
+ info = conf->parser_info;
+ info->pxe_conf_files = pxe_conf_files;
+ info->pxe_base_url = pxe_base_url;
+
+ device_handler_status_dev_info(conf->dc->handler,
+ conf->dc->device,
+ _("Probing from base %s"),
+ pb_url_to_string(pxe_base_url));
- talloc_free(pxe_base_url);
- talloc_free(pxe_conf_files);
+ pxe_load_next_filename(conf);
}
return 0;
projects / petitboot / blobdiff