discover: Move generic config routines to platform

Move the generic config routines from platform-powerpc to platform.
Also, for clarity, add a config_ prefix to the names.

Signed-off-by: Ge Song <ge.song@hxt-semitech.com>
[Split from a larger patch and cleaned up]
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

1 files changed, 298 insertions, 1 deletions

diff --git a/discover/platform.c b/discover/platform.c
index e69c6f6..2ac2de2 100644
--- a/discover/platform.c
+++ b/discover/platform.c
@@ -2,13 +2,16 @@
 #define _GNU_SOURCE
 
 #include <fcntl.h>
-#include <string.h>
+#include <limits.h>
 #include <locale.h>
+#include <stdlib.h>
+#include <string.h>
 
 #include <log/log.h>
 #include <file/file.h>
 #include <types/types.h>
 #include <talloc/talloc.h>
+#include <url/url.h>
 
 #include "platform.h"
 
@@ -263,3 +266,297 @@ int platform_fini(void)
 	talloc_free(platform_ctx);
 	return 0;
 }
+
+static int parse_hwaddr(struct interface_config *ifconf, const char *str)
+{
+	int i;
+
+	if (strlen(str) != strlen("00:00:00:00:00:00"))
+		return -1;
+
+	for (i = 0; i < HWADDR_SIZE; i++) {
+		char byte[3], *endp;
+		unsigned long x;
+
+		byte[0] = str[i * 3 + 0];
+		byte[1] = str[i * 3 + 1];
+		byte[2] = '\0';
+
+		x = strtoul(byte, &endp, 16);
+		if (endp != byte + 2)
+			return -1;
+
+		ifconf->hwaddr[i] = x & 0xff;
+	}
+
+	return 0;
+}
+
+static int config_parse_one_interface(struct config *config, char *confstr)
+{
+	struct interface_config *ifconf;
+	char *tok, *tok_gw, *tok_url, *saveptr;
+
+	ifconf = talloc_zero(config, struct interface_config);
+
+	if (!confstr || !strlen(confstr))
+		goto out_err;
+
+	/* first token should be the mac address */
+	tok = strtok_r(confstr, ",", &saveptr);
+	if (!tok)
+		goto out_err;
+
+	if (parse_hwaddr(ifconf, tok))
+		goto out_err;
+
+	/* second token is the method */
+	tok = strtok_r(NULL, ",", &saveptr);
+	if (!tok || !strlen(tok) || !strcmp(tok, "ignore")) {
+		ifconf->ignore = true;
+
+	} else if (!strcmp(tok, "dhcp")) {
+		ifconf->method = CONFIG_METHOD_DHCP;
+
+	} else if (!strcmp(tok, "static")) {
+		ifconf->method = CONFIG_METHOD_STATIC;
+
+		/* ip/mask, [optional] gateway, [optional] url */
+		tok = strtok_r(NULL, ",", &saveptr);
+		if (!tok)
+			goto out_err;
+		ifconf->static_config.address =
+			talloc_strdup(ifconf, tok);
+
+		/*
+		 * If a url is set but not a gateway, we can accidentally
+		 * interpret the url as the gateway. To avoid changing the
+		 * parameter format check if the "gateway" is actually a
+		 * pb-url if it's the last token.
+		 */
+		tok_gw = strtok_r(NULL, ",", &saveptr);
+		tok_url = strtok_r(NULL, ",", &saveptr);
+
+		if (tok_gw) {
+			if (tok_url || !is_url(tok_gw))
+				ifconf->static_config.gateway =
+					talloc_strdup(ifconf, tok_gw);
+			else
+					tok_url = tok_gw;
+		}
+
+		if (tok_url)
+			ifconf->static_config.url =
+				talloc_strdup(ifconf, tok_url);
+	} else {
+		pb_log("Unknown network configuration method %s\n", tok);
+		goto out_err;
+	}
+
+	config->network.interfaces = talloc_realloc(config,
+			config->network.interfaces,
+			struct interface_config *,
+			++config->network.n_interfaces);
+
+	config->network.interfaces[config->network.n_interfaces - 1] = ifconf;
+
+	return 0;
+out_err:
+	talloc_free(ifconf);
+	return -1;
+}
+
+static int config_parse_one_dns(struct config *config, char *confstr)
+{
+	char *tok, *saveptr = NULL;
+
+	for (tok = strtok_r(confstr, ",", &saveptr); tok;
+			tok = strtok_r(NULL, ",", &saveptr)) {
+
+		char *server = talloc_strdup(config, tok);
+
+		config->network.dns_servers = talloc_realloc(config,
+				config->network.dns_servers, const char *,
+				++config->network.n_dns_servers);
+
+		config->network.dns_servers[config->network.n_dns_servers - 1]
+				= server;
+	}
+
+	return 0;
+}
+
+static void config_populate_network(struct config *config, const char *cval)
+{
+	char *val, *saveptr = NULL;
+	int i;
+
+	if (!cval || !strlen(cval))
+		return;
+
+	val = talloc_strdup(config, cval);
+
+	for (i = 0; ; i++) {
+		char *tok;
+
+		tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr);
+		if (!tok)
+			break;
+
+		if (!strncasecmp(tok, "dns,", strlen("dns,")))
+			config_parse_one_dns(config, tok + strlen("dns,"));
+		else
+			config_parse_one_interface(config, tok);
+
+	}
+
+	talloc_free(val);
+}
+
+static int read_bootdev(void *ctx, char **pos, struct autoboot_option *opt)
+{
+	char *delim = strchr(*pos, ' ');
+	int len, prefix = 0, rc = -1;
+	enum device_type type;
+
+	if (!strncmp(*pos, "uuid:", strlen("uuid:"))) {
+		prefix = strlen("uuid:");
+		opt->boot_type = BOOT_DEVICE_UUID;
+	} else if (!strncmp(*pos, "mac:", strlen("mac:"))) {
+		prefix = strlen("mac:");
+		opt->boot_type = BOOT_DEVICE_UUID;
+	} else {
+		type = find_device_type(*pos);
+		if (type != DEVICE_TYPE_UNKNOWN) {
+			opt->type = type;
+			opt->boot_type = BOOT_DEVICE_TYPE;
+			rc = 0;
+		}
+	}
+
+	if (opt->boot_type == BOOT_DEVICE_UUID) {
+		if (delim)
+			len = (int)(delim - *pos) - prefix;
+		else
+			len = strlen(*pos) - prefix;
+
+		if (len) {
+			opt->uuid = talloc_strndup(ctx, *pos + prefix, len);
+			rc = 0;
+		}
+	}
+
+	/* Always advance pointer to next option or end */
+	if (delim)
+		*pos = delim + 1;
+	else
+		*pos += strlen(*pos);
+
+	return rc;
+}
+
+static void config_populate_bootdev(struct config *config,
+	const struct param_list *pl)
+{
+	struct autoboot_option *opt, *new = NULL;
+	char *pos, *end;
+	unsigned int n_new = 0;
+	const char *val;
+
+	/* Check for ordered bootdevs */
+	val = param_list_get_value(pl, "petitboot,bootdevs");
+	if (!val || !strlen(val)) {
+		pos = end = NULL;
+	} else {
+		pos = talloc_strdup(config, val);
+		end = strchr(pos, '\0');
+	}
+
+	while (pos && pos < end) {
+		opt = talloc(config, struct autoboot_option);
+
+		if (read_bootdev(config, &pos, opt)) {
+			pb_log("bootdev config is in an unknown format "
+			       "(expected uuid:... or mac:...)\n");
+			talloc_free(opt);
+			continue;
+		}
+
+		new = talloc_realloc(config, new, struct autoboot_option,
+				     n_new + 1);
+		new[n_new] = *opt;
+		n_new++;
+		talloc_free(opt);
+
+	}
+
+	if (!n_new) {
+		/* If autoboot has been disabled, clear the default options */
+		if (!config->autoboot_enabled) {
+			talloc_free(config->autoboot_opts);
+			config->n_autoboot_opts = 0;
+		}
+		return;
+	}
+
+	talloc_free(config->autoboot_opts);
+	config->autoboot_opts = new;
+	config->n_autoboot_opts = n_new;
+}
+
+void config_populate_all(struct config *config, const struct param_list *pl)
+{
+	const char *val;
+	char *end;
+	unsigned long timeout;
+
+	/* if the "auto-boot?' property is present and "false", disable auto
+	 * boot */
+	val = param_list_get_value(pl, "auto-boot?");
+	config->autoboot_enabled = !val || strcmp(val, "false");
+
+	val = param_list_get_value(pl, "petitboot,timeout");
+	if (val) {
+		timeout = strtoul(val, &end, 10);
+		if (end != val) {
+			if (timeout >= INT_MAX)
+				timeout = INT_MAX;
+			config->autoboot_timeout_sec = (int)timeout;
+		}
+	}
+
+	val = param_list_get_value(pl, "petitboot,language");
+	config->lang = val ? talloc_strdup(config, val) : NULL;
+
+	val = param_list_get_value(pl, "petitboot,network");
+	config_populate_network(config, val);
+
+	config_populate_bootdev(config, pl);
+
+	if (!config->debug) {
+		val = param_list_get_value(pl, "petitboot,debug?");
+		config->debug = val && !strcmp(val, "true");
+	}
+
+	val = param_list_get_value(pl, "petitboot,write?");
+	if (val)
+		config->allow_writes = !strcmp(val, "true");
+
+	val = param_list_get_value(pl, "petitboot,snapshots?");
+	if (val)
+		config->disable_snapshots = !strcmp(val, "false");
+
+	val = param_list_get_value(pl, "petitboot,console");
+	if (val)
+		config->boot_console = talloc_strdup(config, val);
+	/* If a full path is already set we don't want to override it */
+	config->manual_console = config->boot_console &&
+					!strchr(config->boot_console, '[');
+
+	val = param_list_get_value(pl, "petitboot,http_proxy");
+	if (val)
+		config->http_proxy = talloc_strdup(config, val);
+	val = param_list_get_value(pl, "petitboot,https_proxy");
+	if (val)
+		config->https_proxy = talloc_strdup(config, val);
+}