#define _GNU_SOURCE #include #include #include #include "parser.h" #include "parser-conf.h" #include "parser-utils.h" #include "resource.h" struct pxe_parser_info { struct discover_boot_option *opt; const char *default_name; }; static void pxe_finish(struct conf_context *conf) { struct pxe_parser_info *info = conf->parser_info; if (info->opt) discover_context_add_boot_option(conf->dc, info->opt); } static void pxe_process_pair(struct conf_context *ctx, const char *name, char *value) { 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 * by an '=' */ if (!name && !strncasecmp(value, "initrd=", strlen("initrd="))) { name = "initrd"; value += strlen("initrd="); } 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); 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; } /* 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, "INITRD")) { url = pb_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); str = strcasestr(value, "INITRD="); if (str) { str += strlen("INITRD="); end = strchrnul(str, ' '); *end = '\0'; url = pb_url_join(ctx->dc, ctx->dc->conf_url, str); opt->initrd = create_url_resource(opt, url); } } } static int pxe_parse(struct discover_context *dc, char *buf, int len) { struct pxe_parser_info *parser_info; 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; parser_info = talloc_zero(conf, struct pxe_parser_info); conf->parser_info = parser_info; 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);