lwip: add net_lwip_dns_resolve()
Add a helper fonction to convert an IP address (supplied as a text
string) or a host name to an ip_addr_t.
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
diff --git a/include/net-lwip.h b/include/net-lwip.h
index 58cd384..f54f234 100644
--- a/include/net-lwip.h
+++ b/include/net-lwip.h
@@ -38,6 +38,7 @@
void net_lwip_remove_netif(struct netif *netif);
struct netif *net_lwip_get_netif(void);
int net_lwip_rx(struct udevice *udev, struct netif *netif);
+int net_lwip_dns_resolve(char *name_or_ip, ip_addr_t *ip);
/**
* wget_validate_uri() - varidate the uri
diff --git a/net/lwip/net-lwip.c b/net/lwip/net-lwip.c
index 040b51e..3918d57 100644
--- a/net/lwip/net-lwip.c
+++ b/net/lwip/net-lwip.c
@@ -7,6 +7,7 @@
#include <dm/device.h>
#include <dm/uclass.h>
#include <hexdump.h>
+#include <linux/kernel.h>
#include <lwip/ip4_addr.h>
#include <lwip/dns.h>
#include <lwip/err.h>
@@ -358,6 +359,44 @@
return len;
}
+/**
+ * net_lwip_dns_resolve() - find IP address from name or IP
+ *
+ * @name_or_ip: host name or IP address
+ * @ip: output IP address
+ *
+ * Return value: 0 on success, -1 on failure.
+ */
+int net_lwip_dns_resolve(char *name_or_ip, ip_addr_t *ip)
+{
+#if defined(CONFIG_CMD_DNS)
+ char *var = "_dnsres";
+ char *argv[] = { "dns", name_or_ip, var, NULL };
+ int argc = ARRAY_SIZE(argv) - 1;
+#endif
+
+ if (ipaddr_aton(name_or_ip, ip))
+ return 0;
+
+#if defined(CONFIG_CMD_DNS)
+ if (do_dns(NULL, 0, argc, argv) != CMD_RET_SUCCESS)
+ return -1;
+
+ name_or_ip = env_get(var);
+ if (!name_or_ip)
+ return -1;
+
+ if (!ipaddr_aton(name_or_ip, ip))
+ return -1;
+
+ env_set(var, NULL);
+
+ return 0;
+#else
+ return -1;
+#endif
+}
+
void net_process_received_packet(uchar *in_packet, int len)
{
#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)