-#define _GNU_SOURCE
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+#include <stdlib.h>
#include <string.h>
#include <talloc/talloc.h>
#include <url/url.h>
+#include <log/log.h>
#include "parser.h"
#include "parser-conf.h"
#include "parser-utils.h"
#include "resource.h"
+#include "paths.h"
+#include "event.h"
+#include "user-event.h"
+#include "network.h"
+
+static const char *pxelinux_prefix = "pxelinux.cfg/";
+
+struct pxe_parser_info {
+ struct discover_boot_option *opt;
+ const char *default_name;
+};
static void pxe_finish(struct conf_context *conf)
{
- if (conf->parser_info)
- discover_context_add_boot_option(conf->dc, conf->parser_info);
+ struct pxe_parser_info *info = conf->parser_info;
+ if (info->opt)
+ discover_context_add_boot_option(conf->dc, info->opt);
+}
+
+/* We need a slightly modified version of pb_url_join, to allow for the
+ * pxelinux "::filename" syntax for absolute URLs
+ */
+static struct pb_url *pxe_url_join(void *ctx, const struct pb_url *url,
+ const char *s)
+{
+ struct pb_url *new_url;
+ int len;
+
+ len = strlen(s);
+
+ if (len > 2 && s[0] == ':' && s[1] == ':') {
+ char *tmp;
+
+ if (s[2] == '/') {
+ /* ::/path -> /path */
+ tmp = talloc_strdup(ctx, s+2);
+ } else {
+ /* ::path -> /path */
+ tmp = talloc_strdup(ctx, s+1);
+ tmp[0] = '/';
+ }
+
+ new_url = pb_url_join(ctx, url, tmp);
+
+ talloc_free(tmp);
+
+ } else {
+ const char *tmp;
+ /* strip leading slashes */
+ for (tmp = s; *tmp == '/'; tmp++)
+ ;
+ new_url = pb_url_join(ctx, url, tmp);
+ }
+
+ return new_url;
+}
+
+static void pxe_append_string(struct discover_boot_option *opt,
+ const char *str)
+{
+ if (opt->option->boot_args)
+ opt->option->boot_args = talloc_asprintf_append(
+ opt->option->boot_args, " %s", str);
+ else
+ opt->option->boot_args = talloc_strdup(opt->option, str);
+}
+
+static char *pxe_sysappend_mac(void *ctx, uint8_t *mac)
+{
+ if (!mac)
+ return NULL;
+
+ return talloc_asprintf(ctx,
+ "BOOTIF=01-%02x-%02x-%02x-%02x-%02x-%02x",
+ mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
+}
+
+static void pxe_process_sysappend(struct discover_context *ctx,
+ struct discover_boot_option *opt,
+ unsigned long val)
+{
+ struct event *event = ctx->event;
+ char *str = NULL;
+
+ if (!event)
+ return;
+
+ if (val & 0x2) {
+ uint8_t *mac = find_mac_by_name(ctx, ctx->network,
+ event->device);
+ str = pxe_sysappend_mac(ctx, mac);
+ if (str) {
+ pxe_append_string(opt, str);
+ talloc_free(str);
+ }
+ val &= ~0x2;
+ }
+
+ if (val)
+ pb_log("pxe: unsupported features requested in "
+ "ipappend/sysappend: 0x%04lx", val);
+
}
static void pxe_process_pair(struct conf_context *ctx,
const char *name, char *value)
{
- struct discover_boot_option *opt = ctx->parser_info;
+ struct pxe_parser_info *parser_info = ctx->parser_info;
+ struct discover_boot_option *opt = parser_info->opt;
struct pb_url *url;
/* quirk in the syslinux config format: initrd can be separated
if (!name)
return;
+ if (streq(name, "DEFAULT")) {
+ parser_info->default_name = talloc_strdup(parser_info, value);
+ return;
+ }
+
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->name = talloc_strdup(opt, value);
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);
+
+ parser_info->opt = opt;
return;
}
return;
if (streq(name, "KERNEL")) {
- url = pb_url_join(ctx->dc, ctx->dc->conf_url, value);
+ url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
opt->boot_image = create_url_resource(opt, url);
} else if (streq(name, "INITRD")) {
- url = pb_url_join(ctx->dc, ctx->dc->conf_url, value);
+ url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
opt->initrd = create_url_resource(opt, url);
} else if (streq(name, "APPEND")) {
char *str, *end;
- opt->option->boot_args = talloc_strdup(opt->option, value);
+ pxe_append_string(opt, value);
str = strcasestr(value, "INITRD=");
if (str) {
end = strchrnul(str, ' ');
*end = '\0';
- url = pb_url_join(ctx->dc, ctx->dc->conf_url, str);
+ url = pxe_url_join(ctx->dc, ctx->dc->conf_url, str);
opt->initrd = create_url_resource(opt, url);
}
+ } else if (streq(name, "SYSAPPEND") || streq(name, "IPAPPEND")) {
+ unsigned long type;
+ char *end;
+
+ type = strtoul(value, &end, 10);
+ if (end != value && !(*end))
+ pxe_process_sysappend(ctx->dc, opt, type);
}
}
-static int pxe_parse(struct discover_context *dc, char *buf, int len)
+static int pxe_parse(struct discover_context *dc)
{
+ struct pb_url *pxe_base_url, *url;
+ struct pxe_parser_info *parser_info;
+ char **pxe_conf_files, **filename;
struct conf_context *conf;
+ bool complete_url;
+ int len, rc;
+ char *buf;
+
+ /* Expects dhcp event parameters to support network boot */
+ if (!dc->event)
+ return -1;
conf = talloc_zero(dc, struct conf_context);
if (!conf)
- return 0;
+ goto out;
conf->dc = dc;
conf->get_pair = conf_get_pair_space;
conf->process_pair = pxe_process_pair;
conf->finish = pxe_finish;
+ parser_info = talloc_zero(conf, struct pxe_parser_info);
+ conf->parser_info = parser_info;
+
+ dc->conf_url = user_event_parse_conf_url(dc, dc->event, &complete_url);
+ if (!dc->conf_url)
+ goto out_conf;
+
+ if (complete_url) {
+ /* we have a complete URL; use this and we're done. */
+ rc = parser_request_url(dc, dc->conf_url, &buf, &len);
+ if (rc)
+ goto out_conf;
+ } else {
+ pxe_conf_files = user_event_parse_conf_filenames(dc, dc->event);
+ if (!pxe_conf_files)
+ goto out_conf;
+
+ rc = -1;
+
+ pxe_base_url = pb_url_join(dc, dc->conf_url, pxelinux_prefix);
+ if (!pxe_base_url)
+ goto out_pxe_conf;
+
+ for (filename = pxe_conf_files; *filename; filename++) {
+ url = pb_url_join(dc, pxe_base_url, *filename);
+ if (!url)
+ continue;
+
+ rc = parser_request_url(dc, url, &buf, &len);
+ if (!rc) /* found one, just break */
+ break;
+
+ talloc_free(url);
+ }
+
+ talloc_free(pxe_base_url);
+
+ /* No configuration file found on the boot server */
+ if (rc)
+ goto out_pxe_conf;
+
+ talloc_free(pxe_conf_files);
+ }
+
+ /* Call the config file parser with the data read from the file */
conf_parse_buf(conf, buf, len);
+ talloc_free(buf);
+ talloc_free(conf);
+
+ return 0;
+
+out_pxe_conf:
+ talloc_free(pxe_conf_files);
+out_conf:
talloc_free(conf);
- return 1;
+out:
+ return -1;
}
static struct parser pxe_parser = {
.name = "pxe",
.parse = pxe_parse,
- .method = CONF_METHOD_DHCP,
};
register_parser(pxe_parser);
projects / petitboot / blobdiff