ui/ncurses: Handle arrow key variants
[petitboot] / discover / pxe-parser.c
index 4481e5da9f7c9709d31cea7e00e29709cf203d38..7183ecff2dca169251999be12c3f592a441b1bce 100644 (file)
@@ -11,6 +11,7 @@
 #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);
+       }
 }
 
 /* We need a slightly modified version of pb_url_join, to allow for the
@@ -103,8 +113,9 @@ static void pxe_process_sysappend(struct discover_context *ctx,
                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);
@@ -141,7 +152,15 @@ static void pxe_process_pair(struct conf_context *ctx,
                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);
 
@@ -151,8 +170,12 @@ static void pxe_process_pair(struct conf_context *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;
@@ -162,10 +185,25 @@ static void pxe_process_pair(struct conf_context *ctx,
        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);
 
+               char* args_sigfile_default = talloc_asprintf(opt,
+                       "%s.cmdline.sig", value);
+               url = pxe_url_join(ctx->dc, ctx->dc->conf_url,
+                       args_sigfile_default);
+               opt->args_sig_file = create_url_resource(opt, url);
+               talloc_free(args_sigfile_default);
+
        } else if (streq(name, "INITRD")) {
                url = pxe_url_join(ctx->dc, ctx->dc->conf_url, value);
                opt->initrd = create_url_resource(opt, url);
@@ -196,7 +234,28 @@ static void pxe_process_pair(struct conf_context *ctx,
                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;
 }
 
 /*
@@ -208,39 +267,60 @@ static void pxe_conf_parse_cb(struct load_url_result *result, void *data)
 {
        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 || result->status != LOAD_OK) {
-               talloc_free(conf);
+       handler = talloc_parent(conf);
+
+       if (result && result->status == LOAD_OK)
+               rc = read_file(conf, result->local, &buf, &len);
+       if (!result || 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;
        }
 
-       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;
-       }
+       /*
+        * 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
+        */
 
        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:
@@ -288,11 +368,12 @@ static struct conf_context *copy_context(void *ctx, struct discover_context *dc)
 
 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;
        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 */
@@ -307,22 +388,30 @@ static int pxe_parse(struct discover_context *dc)
         * 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) {
+               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);
+                                       pxe_conf_parse_cb, conf, NULL, ctx);
                if (!result) {
                        pb_log("load_url_async fails for %s\n",
                                        dc->conf_url->path);
                        goto out_conf;
+               } else if (result->status == LOAD_OK) {
+                       /* Local load - call pxe_conf_parse_cb() now */
+                       pxe_conf_parse_cb(result, conf);
                }
        } else {
                pxe_conf_files = user_event_parse_conf_filenames(dc, dc->event);
@@ -333,26 +422,16 @@ static int pxe_parse(struct discover_context *dc)
                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;