[PATCH 5/7] discover/platform-powerpc: Add NVRAM parameter for IPv6

[Samuel Mendoza-Jonas]

Add a new NVRAM parameter to signal which address scheme should be used.
This is kept separate from petitboot,network to maintain some backwards
compatibility for IPv4 configurations.

Signed-off-by: Samuel Mendoza-Jonas <sam at mendozajonas.com>
---
 discover/platform-powerpc.c | 15 +++++++++++++++
 discover/platform.c         |  1 +
 2 files changed, 16 insertions(+)

diff --git a/discover/platform-powerpc.c b/discover/platform-powerpc.c
index df8c7d6..ba7c470 100644
--- a/discover/platform-powerpc.c
+++ b/discover/platform-powerpc.c
@@ -53,6 +53,7 @@ struct platform_powerpc {
 static const char *known_params[] = {
 	"auto-boot?",
 	"petitboot,network",
+	"petitboot,network_type",
 	"petitboot,timeout",
 	"petitboot,bootdevs",
 	"petitboot,language",
@@ -387,6 +388,16 @@ static void populate_network_config(struct platform_powerpc *platform,
 	const char *cval;
 	int i;
 
+	cval = get_param(platform, "petitboot,network_type");
+	if (!cval || !strlen(cval) || strncmp(cval, "ipv4", strlen("ipv4")) == 0)
+		config->network.addr_type = ADDR_IPV4;
+	else if (strncmp(cval, "ipv6", strlen("ipv6")) == 0)
+		config->network.addr_type = ADDR_IPV6;
+	else {
+		pb_debug("malformed petitboot,network_type param");
+		config->network.addr_type = ADDR_IPV4;
+	}
+
 	cval = get_param(platform, "petitboot,network");
 	if (!cval || !strlen(cval))
 		return;
@@ -630,6 +641,10 @@ static void update_network_config(struct platform_powerpc *platform,
 		config->network.interfaces[0]->override)
 		return;
 
+	update_string_config(platform, "petitboot,network_type",
+			config->network.addr_type == ADDR_IPV6 ?
+				"ipv6" : "ipv4");
+
 	val = talloc_strdup(platform, "");
 
 	for (i = 0; i < config->network.n_interfaces; i++) {
diff --git a/discover/platform.c b/discover/platform.c
index cc6306f..30a6ffd 100644
--- a/discover/platform.c
+++ b/discover/platform.c
@@ -126,6 +126,7 @@ void config_set_defaults(struct config *config)
 	config->network.n_interfaces = 0;
 	config->network.dns_servers = NULL;
 	config->network.n_dns_servers = 0;
+	config->network.addr_type = ADDR_IPV4;
 	config->http_proxy = NULL;
 	config->https_proxy = NULL;
 	config->safe_mode = false;
-- 
2.17.0