From da7f23fd19752991f8e7f47ebf3477b17d788e02 Mon Sep 17 00:00:00 2001
From: Sasha Levitskiy <sanek@google.com>
Date: Mon, 30 Jul 2012 16:12:55 -0700
Subject: Adds a dynamic interface command library for Broadcom bcmdhd

Change-Id: Ie1d1bdd94a26d5647c739d86806dae528301fa00
---
 bcmdhd/bcmdhd_net_iface/Android.mk         | 30 +++++++++++
 bcmdhd/bcmdhd_net_iface/bcmdhd_net_iface.c | 84 ++++++++++++++++++++++++++++++
 2 files changed, 114 insertions(+)
 create mode 100644 bcmdhd/bcmdhd_net_iface/Android.mk
 create mode 100644 bcmdhd/bcmdhd_net_iface/bcmdhd_net_iface.c

diff --git a/bcmdhd/bcmdhd_net_iface/Android.mk b/bcmdhd/bcmdhd_net_iface/Android.mk
new file mode 100644
index 0000000..be22624
--- /dev/null
+++ b/bcmdhd/bcmdhd_net_iface/Android.mk
@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2012 Google, inc.
+#
+# $Id: Android.mk,v 2.6 2009-05-07 18:25:15 hharte Exp $
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+#
+# lib_net_iface_cmd
+#
+
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := bcmdhd_net_iface.c
+LOCAL_MODULE := libnetcmdiface
+LOCAL_CFLAGS := -mabi=aapcs-linux
+LOCAL_MODULE_TAGS := optional
+LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
+include $(BUILD_SHARED_LIBRARY)
diff --git a/bcmdhd/bcmdhd_net_iface/bcmdhd_net_iface.c b/bcmdhd/bcmdhd_net_iface/bcmdhd_net_iface.c
new file mode 100644
index 0000000..9aed684
--- /dev/null
+++ b/bcmdhd/bcmdhd_net_iface/bcmdhd_net_iface.c
@@ -0,0 +1,84 @@
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <linux/in.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <cutils/log.h>
+#include <netutils/ifc.h>
+#include <private/android_filesystem_config.h>
+
+#define INTERFACE_MAX_BUFFER_SIZE 4096
+
+typedef struct android_wifi_priv_cmd {
+	char *buf;
+	int used_len;
+	int total_len;
+} android_wifi_priv_cmd;
+
+static struct net_if_snd_cmd_state {
+	int sock;
+	char cmd[INTERFACE_MAX_BUFFER_SIZE];
+	char ibuf[INTERFACE_MAX_BUFFER_SIZE];
+} state;
+
+int net_iface_send_command_init(void) {
+	state.sock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (state.sock < 0) {
+		return -ENOTCONN;
+	} else {
+		return 0;
+	}
+}
+
+/*
+ * Arguments:
+ *	  argv[2] - wlan interface
+ *	  argv[3] - command
+ *	  argv[4] - argument
+ */
+int net_iface_send_command(int argc, char *argv[], char **rbuf) {
+	int ret, i;
+	size_t bc = 0;
+	struct ifreq ifr;
+	android_wifi_priv_cmd priv_cmd;
+
+	if (argc < 3) {
+		return -EINVAL;
+	}
+	for (i = 3; i < argc; i++) {
+		bc += snprintf(&state.cmd[bc], sizeof(state.cmd) - bc, "%s ", argv[i]);
+		if (bc >= sizeof(state.cmd)) {
+			return -ENOBUFS;
+		}
+	}
+	state.cmd[bc] = '\0';
+
+	memset(&ifr, 0, sizeof(ifr));
+	strncpy(ifr.ifr_name, argv[2], IFNAMSIZ);
+	strncpy(state.ibuf, state.cmd, INTERFACE_MAX_BUFFER_SIZE);
+
+	priv_cmd.buf = state.ibuf;
+	priv_cmd.used_len = INTERFACE_MAX_BUFFER_SIZE;
+	priv_cmd.total_len = INTERFACE_MAX_BUFFER_SIZE;
+
+	ifr.ifr_data = &priv_cmd;
+
+	if ((ret = ioctl(state.sock, SIOCDEVPRIVATE + 1, &ifr)) < 0) {
+		return ret;
+	}
+
+	if (rbuf)
+		*rbuf = state.ibuf;
+	else
+		ret = -EFAULT;
+
+	return ret;
+}
-- 
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