Add support for GPG signature enforcement on booted
[petitboot] / discover / user-event.c
index d7e0d195035efa43202137de78d57bfb78fd3da8..6ea754fea808de474368b887a43278aef8248fbb 100644 (file)
@@ -20,7 +20,6 @@
 #include "config.h"
 #endif
 
-#define _GNU_SOURCE
 #include <assert.h>
 #include <errno.h>
 #include <string.h>
@@ -55,8 +54,14 @@ static const char *event_action_name(enum event_action action)
                return "add";
        case EVENT_ACTION_REMOVE:
                return "remove";
+       case EVENT_ACTION_URL:
+               return "url";
        case EVENT_ACTION_DHCP:
                return "dhcp";
+       case EVENT_ACTION_BOOT:
+               return "boot";
+       case EVENT_ACTION_SYNC:
+               return "sync";
        default:
                break;
        }
@@ -77,7 +82,7 @@ static void user_event_print_event(struct event __attribute__((unused)) *event)
 }
 
 static struct resource *user_event_resource(struct discover_boot_option *opt,
-               struct event *event)
+               struct event *event, bool gen_boot_args_sigfile)
 {
        const char *siaddr, *boot_file;
        struct resource *res;
@@ -90,13 +95,22 @@ static struct resource *user_event_resource(struct discover_boot_option *opt,
                return NULL;
        }
 
-       boot_file = event_get_param(event, "boot_file");
+       boot_file = event_get_param(event, "bootfile");
        if (!boot_file) {
-               pb_log("%s: boot_file not found\n", __func__);
+               pb_log("%s: bootfile not found\n", __func__);
                return NULL;
        }
 
-       url_str = talloc_asprintf(opt, "%s%s/%s", "tftp://", siaddr, boot_file);
+       if (gen_boot_args_sigfile) {
+               char* args_sigfile_default = talloc_asprintf(opt,
+                       "%s.cmdline.sig", boot_file);
+               url_str = talloc_asprintf(opt, "%s%s/%s", "tftp://", siaddr,
+                       args_sigfile_default);
+               talloc_free(args_sigfile_default);
+       }
+       else
+               url_str = talloc_asprintf(opt, "%s%s/%s", "tftp://", siaddr,
+                       boot_file);
        url = pb_url_parse(opt, url_str);
        talloc_free(url_str);
 
@@ -138,12 +152,13 @@ static int parse_user_event(struct discover_context *ctx, struct event *event)
        opt->id = talloc_asprintf(opt, "%s#%s", dev->id, val);
        opt->name = talloc_strdup(opt, val);
 
-       d_opt->boot_image = user_event_resource(d_opt, event);
+       d_opt->boot_image = user_event_resource(d_opt, event, false);
        if (!d_opt->boot_image) {
                pb_log("%s: no boot image found for %s!\n", __func__,
                                opt->name);
                goto fail_opt;
        }
+       d_opt->args_sig_file = user_event_resource(d_opt, event, true);
 
        val = event_get_param(event, "rootpath");
        if (val) {
@@ -209,7 +224,7 @@ static char *parse_mac_addr(struct discover_context *ctx, const char *mac)
                        mac_addr_arr + 2, mac_addr_arr + 3, mac_addr_arr + 4,
                        mac_addr_arr + 5);
 
-       mac_addr = talloc_asprintf(ctx, "01-%02X-%02X-%02X-%02X-%02X-%02X",
+       mac_addr = talloc_asprintf(ctx, "01-%02x-%02x-%02x-%02x-%02x-%02x",
                        mac_addr_arr[0], mac_addr_arr[1], mac_addr_arr[2],
                        mac_addr_arr[3], mac_addr_arr[4], mac_addr_arr[5]);
 
@@ -231,62 +246,85 @@ static char *parse_ip_addr(struct discover_context *ctx, const char *ip)
 }
 
 struct pb_url *user_event_parse_conf_url(struct discover_context *ctx,
-               struct event *event)
+               struct event *event, bool *is_complete)
 {
-       const char *conffile, *host, *bootfile;
+       const char *conffile, *pathprefix, *host, *bootfile;
        char *p, *basedir, *url_str;
        struct pb_url *url;
 
        conffile = event_get_param(event, "pxeconffile");
-       if (conffile) {
-               if (is_url(conffile)) {
-                       url = pb_url_parse(ctx, conffile);
-               } else {
-                       host = parse_host_addr(event);
-                       if (!host) {
-                               pb_log("%s: host address not found\n",
-                                               __func__);
-                               return NULL;
-                       }
-
-                       url_str = talloc_asprintf(ctx, "%s%s/%s", "tftp://",
-                                       host, conffile);
-                       url = pb_url_parse(ctx, url_str);
+       pathprefix = event_get_param(event, "pxepathprefix");
+       bootfile = event_get_param(event, "bootfile");
+
+       /* If we're given a conf file, we're able to generate a complete URL to
+        * the configuration file, and the parser doesn't need to do any
+        * further autodiscovery */
+       *is_complete = !!conffile;
+
+       /* if conffile is a URL, that's all we need */
+       if (conffile && is_url(conffile)) {
+               url = pb_url_parse(ctx, conffile);
+               return url;
+       }
 
+       /* If we can create a URL from pathprefix (optionally with
+        * conffile appended to create a complete URL), use that */
+       if (pathprefix && is_url(pathprefix)) {
+               if (conffile) {
+                       url_str = talloc_asprintf(ctx, "%s%s",
+                                       pathprefix, conffile);
+                       url = pb_url_parse(ctx, url_str);
                        talloc_free(url_str);
+               } else {
+                       url = pb_url_parse(ctx, pathprefix);
                }
 
-               ctx->conf_url = url;
-       } else {
-               host = parse_host_addr(event);
-               if (!host) {
-                       pb_log("%s: host address not found\n", __func__);
-                       return NULL;
-               }
+               return url;
+       }
 
-               bootfile = event_get_param(event, "bootfile");
-               if (!bootfile) {
-                       pb_log("%s: bootfile param not found\n", __func__);
-                       return NULL;
-               }
+       host = parse_host_addr(event);
+       if (!host) {
+               pb_log("%s: host address not found\n", __func__);
+               return NULL;
+       }
+
+       url_str = talloc_asprintf(ctx, "tftp://%s/", host);
+
+       /* if we have a pathprefix, use that directly.. */
+       if (pathprefix) {
+               /* strip leading slashes */
+               while (pathprefix[0] == '/')
+                       pathprefix++;
+               url_str = talloc_asprintf_append(url_str, "%s", pathprefix);
+
+       /* ... otherwise, add a path based on the bootfile name, but only
+        * if conffile isn't an absolute path itself */
+       } else if (bootfile && !(conffile && conffile[0] == '/')) {
 
                basedir = talloc_strdup(ctx, bootfile);
-               p = strchr(basedir, '/');
-               if (p)
-                       *p = '\0';
 
-               if (!strcmp(basedir,"") || !strcmp(basedir, "."))
-                       url_str = talloc_asprintf(ctx, "%s%s/", "tftp://",host);
-               else
-                       url_str = talloc_asprintf(ctx, "%s%s/%s/", "tftp://",host,
-                                       basedir);
+               /* strip filename from the bootfile path, leaving only a
+                * directory */
+               p = strrchr(basedir, '/');
+               if (!p)
+                       p = basedir;
+               *p = '\0';
 
-               url = pb_url_parse(ctx, url_str);
+               if (strlen(basedir))
+                       url_str = talloc_asprintf_append(url_str, "%s/",
+                                       basedir);
 
-               talloc_free(url_str);
                talloc_free(basedir);
        }
 
+       /* finally, append conffile */
+       if (conffile)
+               url_str = talloc_asprintf_append(url_str, "%s", conffile);
+
+       url = pb_url_parse(ctx, url_str);
+
+       talloc_free(url_str);
+
        return url;
 }
 
@@ -408,6 +446,48 @@ static int user_event_remove(struct user_event *uev, struct event *event)
        return 0;
 }
 
+static int user_event_url(struct user_event *uev, struct event *event)
+{
+       struct device_handler *handler = uev->handler;
+       const char *url;
+
+       url = event_get_param(event, "url");
+       if (url)
+               device_handler_process_url(handler, url, NULL, NULL);
+
+       return 0;
+}
+
+static int user_event_boot(struct user_event *uev, struct event *event)
+{
+       struct device_handler *handler = uev->handler;
+       struct boot_command *cmd = talloc(handler, struct boot_command);
+
+       cmd->option_id = talloc_strdup(cmd, event_get_param(event, "id"));
+       cmd->boot_image_file = talloc_strdup(cmd, event_get_param(event, "image"));
+       cmd->initrd_file = talloc_strdup(cmd, event_get_param(event, "initrd"));
+       cmd->dtb_file = talloc_strdup(cmd, event_get_param(event, "dtb"));
+       cmd->boot_args = talloc_strdup(cmd, event_get_param(event, "args"));
+
+       device_handler_boot(handler, cmd);
+
+       talloc_free(cmd);
+
+       return 0;
+}
+
+static int user_event_sync(struct user_event *uev, struct event *event)
+{
+       struct device_handler *handler = uev->handler;
+
+       if (strncasecmp(event->device, "all", strlen("all")) != 0)
+               device_sync_snapshots(handler, event->device);
+       else
+               device_sync_snapshots(handler, NULL);
+
+       return 0;
+}
+
 static void user_event_handle_message(struct user_event *uev, char *buf,
        int len)
 {
@@ -431,12 +511,21 @@ static void user_event_handle_message(struct user_event *uev, char *buf,
        case EVENT_ACTION_REMOVE:
                result = user_event_remove(uev, event);
                break;
+       case EVENT_ACTION_URL:
+               result = user_event_url(uev, event);
+               break;
        case EVENT_ACTION_CONF:
                result = user_event_conf(uev, event);
                break;
        case EVENT_ACTION_DHCP:
                result = user_event_dhcp(uev, event);
                break;
+       case EVENT_ACTION_BOOT:
+               result = user_event_boot(uev, event);
+               break;
+       case EVENT_ACTION_SYNC:
+               result = user_event_sync(uev, event);
+               break;
        default:
                break;
        }
@@ -449,10 +538,10 @@ static void user_event_handle_message(struct user_event *uev, char *buf,
 static int user_event_process(void *arg)
 {
        struct user_event *uev = arg;
-       char buf[PBOOT_USER_EVENT_SIZE];
+       char buf[PBOOT_USER_EVENT_SIZE + 1];
        int len;
 
-       len = recvfrom(uev->socket, buf, sizeof(buf), 0, NULL, NULL);
+       len = recvfrom(uev->socket, buf, PBOOT_USER_EVENT_SIZE, 0, NULL, NULL);
 
        if (len < 0) {
                pb_log("%s: socket read failed: %s", __func__, strerror(errno));
@@ -464,6 +553,8 @@ static int user_event_process(void *arg)
                return 0;
        }
 
+       buf[len] = '\0';
+
        pb_debug("%s: %u bytes\n", __func__, len);
 
        user_event_handle_message(uev, buf, len);
@@ -483,15 +574,15 @@ static int user_event_destructor(void *arg)
        return 0;
 }
 
-struct user_event *user_event_init(struct waitset *waitset,
-               struct device_handler *handler)
+struct user_event *user_event_init(struct device_handler *handler,
+               struct waitset *waitset)
 {
        struct sockaddr_un addr;
        struct user_event *uev;
 
        unlink(PBOOT_USER_EVENT_SOCKET);
 
-       uev = talloc(NULL, struct user_event);
+       uev = talloc(handler, struct user_event);
 
        uev->handler = handler;
 
@@ -524,8 +615,3 @@ out_err:
        talloc_free(uev);
        return NULL;
 }
-
-void user_event_destroy(struct user_event *uev)
-{
-       talloc_free(uev);
-}