nfacct: Initial check-innougat-mr1-arc

This is a port of Plablo Niera Ayuso's nfacct tool from
libmnl to libnl.  The behavior and usage have been kept
compliant with the original version.

Change-Id: I2f1d573226764d59494d393a905fcc54a46b7fac
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org.

3 files changed, 664 insertions, 0 deletions

diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..a72a64c
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,15 @@
+LOCAL_PATH:= $(call my-dir)
+
+INCLUDES = $(LOCAL_PATH)
+INCLUDES += external/libnl/include
+LIBS += -lnl-3
+
+########################
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES:= nfacct.c
+LOCAL_MODULE := nfacct
+
+LOCAL_SHARED_LIBRARIES += libnl
+LOCAL_C_INCLUDES := $(INCLUDES)
+
+include $(BUILD_EXECUTABLE)
diff --git a/CleanSpec.mk b/CleanSpec.mk
new file mode 100644
index 0000000..b84e1b6
--- /dev/null
+++ b/CleanSpec.mk
@@ -0,0 +1,49 @@
+# Copyright (C) 2007 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# If you don't need to do a full clean build but would like to touch
+# a file or delete some intermediate files, add a clean step to the end
+# of the list.  These steps will only be run once, if they haven't been
+# run before.
+#
+# E.g.:
+#     $(call add-clean-step, touch -c external/sqlite/sqlite3.h)
+#     $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libz_intermediates)
+#
+# Always use "touch -c" and "rm -f" or "rm -rf" to gracefully deal with
+# files that are missing or have been moved.
+#
+# Use $(PRODUCT_OUT) to get to the "out/target/product/blah/" directory.
+# Use $(OUT_DIR) to refer to the "out" directory.
+#
+# If you need to re-do something that's already mentioned, just copy
+# the command and add it to the bottom of the list.  E.g., if a change
+# that you made last week required touching a file and a change you
+# made today requires touching the same file, just copy the old
+# touch step and add it to the end of the list.
+#
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
+
+# For example:
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/AndroidTests_intermediates)
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/core_intermediates)
+#$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
+#$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
+
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
diff --git a/nfacct.c b/nfacct.c
new file mode 100644
index 0000000..4ea3a9d
--- /dev/null
+++ b/nfacct.c
@@ -0,0 +1,600 @@
+/*
+ * Original implementation on libmnl:
+ * (C) 2011 by Pablo Neira Ayuso <pablo@netfilter.org>
+ * (C) 2011 by Intra2net AG <http://www.intra2net.com>
+ *
+ * Port to libnl:
+ * (C) 2013 by Mathieu J. Poirier <mathieu.poirier@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+
+#include <netlink-local.h>
+#include <linux/netlink.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_acct.h>
+#include <netlink/netfilter/nfnl.h>
+#include <netlink/netlink.h>
+#include <netlink/socket.h>
+#include <netlink/msg.h>
+
+#define VERSION "1.0.1"
+
+enum {
+	NFACCT_CMD_NONE = 0,
+	NFACCT_CMD_LIST,
+	NFACCT_CMD_ADD,
+	NFACCT_CMD_DELETE,
+	NFACCT_CMD_GET,
+	NFACCT_CMD_FLUSH,
+	NFACCT_CMD_VERSION,
+	NFACCT_CMD_HELP,
+	NFACCT_CMD_RESTORE,
+};
+
+static int nfacct_cmd_list(int argc, char *argv[]);
+static int nfacct_cmd_add(int argc, char *argv[]);
+static int nfacct_cmd_delete(int argc, char *argv[]);
+static int nfacct_cmd_get(int argc, char *argv[]);
+static int nfacct_cmd_flush(int argc, char *argv[]);
+static int nfacct_cmd_version(int argc, char *argv[]);
+static int nfacct_cmd_help(int argc, char *argv[]);
+static int nfacct_cmd_restore(int argc, char *argv[]);
+
+static void usage(char *argv[])
+{
+	fprintf(stderr, "Usage: %s command [parameters]...\n", argv[0]);
+}
+
+static void nfacct_perror(const char *msg)
+{
+	if (errno == 0) {
+		fprintf(stderr, "nfacct v%s: %s\n", VERSION, msg);
+	} else {
+		fprintf(stderr, "nfacct v%s: %s: %s\n",
+			VERSION, msg, strerror(errno));
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	int cmd = NFACCT_CMD_NONE, ret = 0;
+
+	if (argc < 2) {
+		usage(argv);
+		exit(EXIT_FAILURE);
+	}
+
+	if (strncmp(argv[1], "list", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_LIST;
+	else if (strncmp(argv[1], "add", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_ADD;
+	else if (strncmp(argv[1], "delete", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_DELETE;
+	else if (strncmp(argv[1], "get", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_GET;
+	else if (strncmp(argv[1], "flush", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_FLUSH;
+	else if (strncmp(argv[1], "version", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_VERSION;
+	else if (strncmp(argv[1], "help", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_HELP;
+	else if (strncmp(argv[1], "restore", strlen(argv[1])) == 0)
+		cmd = NFACCT_CMD_RESTORE;
+	else {
+		fprintf(stderr, "nfacct v%s: Unknown command: %s\n",
+			VERSION, argv[1]);
+		usage(argv);
+		exit(EXIT_FAILURE);
+	}
+
+	switch(cmd) {
+	case NFACCT_CMD_LIST:
+		ret = nfacct_cmd_list(argc, argv);
+		break;
+	case NFACCT_CMD_ADD:
+		ret = nfacct_cmd_add(argc, argv);
+		break;
+	case NFACCT_CMD_DELETE:
+		ret = nfacct_cmd_delete(argc, argv);
+		break;
+	case NFACCT_CMD_GET:
+		ret = nfacct_cmd_get(argc, argv);
+		break;
+	case NFACCT_CMD_FLUSH:
+		ret = nfacct_cmd_flush(argc, argv);
+		break;
+	case NFACCT_CMD_VERSION:
+		ret = nfacct_cmd_version(argc, argv);
+		break;
+	case NFACCT_CMD_HELP:
+		ret = nfacct_cmd_help(argc, argv);
+		break;
+	case NFACCT_CMD_RESTORE:
+		ret = nfacct_cmd_restore(argc, argv);
+		break;
+	}
+	return ret < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+
+
+static int message_received(struct nl_msg *msg, void *arg)
+{
+	struct nlmsghdr *hdr = msg->nm_nlh;
+
+	if (hdr->nlmsg_type == NLMSG_ERROR) {
+		struct nlmsgerr *err = nlmsg_data(hdr);
+
+		if (err->error == 0)
+			return NL_STOP;
+	}
+
+	return NL_OK;
+}
+
+static int valid_input(struct nl_msg *msg, void *arg)
+{
+	struct nlattr *nla = nlmsg_attrdata(nlmsg_hdr(msg),
+					 sizeof(struct nfgenmsg));
+	struct nlattr *tb[NFACCT_NAME_MAX+1] = {};
+	char buf[4096];
+	int ret;
+
+	ret = nlmsg_parse(nlmsg_hdr(msg),
+			 sizeof(struct nfgenmsg), tb, NFACCT_MAX, NULL);
+
+	if (ret < 0) {
+		nfacct_perror("Can't parse message\n");
+		return ret;
+	}
+
+	ret = snprintf(buf, sizeof(buf),
+		"{ pkts = %.20llu, bytes = %.20llu } = %s;",
+		(unsigned long long)be64toh(nla_get_u64(tb[NFACCT_PKTS])),
+		(unsigned long long)be64toh(nla_get_u64(tb[NFACCT_BYTES])),
+		nla_get_string(tb[NFACCT_NAME]));
+
+	printf("%s\n", buf);
+
+	return 0;
+}
+
+static int nfacct_cmd_list(int argc, char *argv[])
+{
+	struct nl_msg *msg;
+	struct nl_handle *handle;
+	int zeroctr = 0;
+	int ret, i;
+
+	for (i=2; i<argc; i++) {
+		if (strncmp(argv[i], "reset", strlen(argv[i])) == 0) {
+			zeroctr = 1;
+		} else if (strncmp(argv[i], "xml", strlen(argv[i])) == 0) {
+			nfacct_perror("xml feature not implemented");
+			return -1;
+		} else {
+			nfacct_perror("unknown argument");
+			return -1;
+		}
+	}
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	ret = nfnlmsg_put(msg,
+			NL_AUTO_PID,
+			NL_AUTO_SEQ,
+			NFNL_SUBSYS_ACCT,
+			zeroctr ?
+			NFNL_MSG_ACCT_GET_CTRZERO : NFNL_MSG_ACCT_GET,
+			NLM_F_DUMP | NLM_F_REQUEST,
+			AF_UNSPEC,
+			0);
+
+	if (ret) {
+		NL_DBG(2, "Can't append payload to message: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	handle = nl_handle_alloc();
+	if ((ret = nfnl_connect(handle))) {
+		NL_DBG(2, "Can't connect handle: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	if ((ret = nl_send_auto_complete(handle, msg)) < 0) {
+		NL_DBG(2, "Can't send msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail_send;
+        }
+
+	nl_socket_modify_cb(handle, NL_CB_VALID, NL_CB_CUSTOM, valid_input, NULL);
+	ret = nl_recvmsgs_default(handle);
+	if (ret < 0) {
+		NL_DBG(2, "Can't receice msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+	}
+
+fail_send:
+	nl_close(handle);
+	nl_handle_destroy(handle);
+fail:
+	nlmsg_free(msg);
+	return ret;
+}
+
+static int _nfacct_cmd_add(char *name, int pkts, int bytes)
+{
+	struct nl_msg *msg;
+	struct nl_handle *handle;
+	char nfname[NFACCT_NAME_MAX];
+	int ret;
+
+	strncpy(nfname, name, NFACCT_NAME_MAX);
+	nfname[NFACCT_NAME_MAX-1] = '\0';
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	ret = nfnlmsg_put(msg,
+			NL_AUTO_PID,
+			NL_AUTO_SEQ,
+			NFNL_SUBSYS_ACCT,
+			NFNL_MSG_ACCT_NEW,
+			NLM_F_CREATE | NLM_F_ACK | NLM_F_REQUEST,
+			AF_UNSPEC,
+			0);
+
+	if (ret) {
+		NL_DBG(2, "Can't append payload to message: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	nla_put_string(msg, NFACCT_NAME, nfname);
+	nla_put_u64(msg, NFACCT_PKTS, htobe64(pkts));
+	nla_put_u64(msg, NFACCT_BYTES, htobe64(bytes));
+
+	handle = nl_handle_alloc();
+	if ((ret = nfnl_connect(handle))) {
+		NL_DBG(2, "Can't connect handle: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	if ((ret = nl_send_auto_complete(handle, msg)) < 0) {
+		NL_DBG(2, "Can't send msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail_send;
+        }
+
+	ret = nl_recvmsgs_default(handle);
+	if (ret < 0) {
+		NL_DBG(2, "Can't receice msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+	}
+
+fail_send:
+	nl_close(handle);
+	nl_handle_destroy(handle);
+fail:
+	nlmsg_free(msg);
+	return ret;
+}
+
+
+
+static int nfacct_cmd_add(int argc, char *argv[])
+{
+	if (argc < 3) {
+		nfacct_perror("missing object name");
+		return -1;
+	} else if (argc > 3) {
+		nfacct_perror("too many arguments");
+		return -1;
+	}
+
+	return _nfacct_cmd_add(argv[2], 0, 0);
+}
+
+static int nfacct_cmd_delete(int argc, char *argv[])
+{
+	struct nl_msg *msg;
+	struct nl_handle *handle;
+	char nfname[NFACCT_NAME_MAX];
+	int ret;
+
+	if (argc < 3) {
+		nfacct_perror("missing object name");
+		return -1;
+	} else if (argc > 3) {
+		nfacct_perror("too many arguments");
+		return -1;
+	}
+
+	strncpy(nfname, argv[2], NFACCT_NAME_MAX);
+	nfname[NFACCT_NAME_MAX-1] = '\0';
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	ret = nfnlmsg_put(msg,
+			NL_AUTO_PID,
+			NL_AUTO_SEQ,
+			NFNL_SUBSYS_ACCT,
+			NFNL_MSG_ACCT_DEL,
+			NLM_F_ACK | NLM_F_REQUEST,
+			AF_UNSPEC,
+			0);
+
+	if (ret) {
+		NL_DBG(2, "Can't append payload to message: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	nla_put_string(msg, NFACCT_NAME, nfname);
+
+	handle = nl_handle_alloc();
+	if ((ret = nfnl_connect(handle))) {
+		NL_DBG(2, "Can't connect handle: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	if ((ret = nl_send_auto_complete(handle, msg)) < 0) {
+		NL_DBG(2, "Can't send msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail_send;
+        }
+
+	ret = nl_recvmsgs_default(handle);
+	if (ret < 0) {
+		NL_DBG(2, "Can't receice msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+	}
+
+fail_send:
+	nl_close(handle);
+	nl_handle_destroy(handle);
+fail:
+	nlmsg_free(msg);
+	return ret;
+	return 0;
+}
+
+
+static int nfacct_cmd_get(int argc, char *argv[])
+{
+	struct nl_msg *msg;
+	struct nl_handle *handle;
+	struct nl_cb *cb;
+	char nfname[NFACCT_NAME_MAX];
+	int zeroctr = 0;
+	int ret, i;
+
+	if (argc < 3) {
+		nfacct_perror("missing object name");
+		 return -1;
+	}
+
+	for (i=3; i<argc; i++) {
+		if (strncmp(argv[i], "reset", strlen(argv[i])) == 0) {
+			zeroctr = 1;
+		} else if (strncmp(argv[i], "xml", strlen(argv[i])) == 0) {
+			nfacct_perror("xml feature not implemented");
+			return -1;
+		} else {
+			nfacct_perror("unknown argument");
+			return -1;
+		}
+	}
+
+	strncpy(nfname, argv[2], NFACCT_NAME_MAX);
+	nfname[NFACCT_NAME_MAX-1] = '\0';
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	ret = nfnlmsg_put(msg,
+			NL_AUTO_PID,
+			NL_AUTO_SEQ,
+			NFNL_SUBSYS_ACCT,
+			zeroctr ?
+			NFNL_MSG_ACCT_GET_CTRZERO : NFNL_MSG_ACCT_GET,
+			NLM_F_ACK | NLM_F_REQUEST,
+			AF_UNSPEC,
+			0);
+
+	if (ret) {
+		NL_DBG(2, "Can't append payload to message: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	nla_put_string(msg, NFACCT_NAME, nfname);
+
+	handle = nl_handle_alloc();
+
+	if (handle) {
+		cb = nl_cb_alloc(NL_CB_DEFAULT);
+		if (!cb)
+			goto fail;
+
+		if (nl_cb_set(cb, NL_CB_MSG_IN,
+				 NL_CB_CUSTOM,
+				 message_received, NULL) < 0)
+			goto fail;
+
+		nl_socket_set_cb(handle,cb);
+	} else {
+		goto fail;
+	}
+
+	if ((ret = nfnl_connect(handle))) {
+		NL_DBG(2, "Can't connect handle: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	if ((ret = nl_send_auto_complete(handle, msg)) < 0) {
+		NL_DBG(2, "Can't send msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail_send;
+        }
+
+	nl_socket_modify_cb(handle, NL_CB_VALID, NL_CB_CUSTOM, valid_input, NULL);
+	ret = nl_recvmsgs_default(handle);
+	if (ret < 0) {
+		NL_DBG(2, "Can't receice msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+	}
+
+fail_send:
+	nl_close(handle);
+	nl_handle_destroy(handle);
+fail:
+	nlmsg_free(msg);
+	return ret;
+}
+
+static int nfacct_cmd_flush(int argc, char *argv[])
+{
+	struct nl_msg *msg;
+	struct nl_handle *handle;
+	int ret;
+
+	if (argc > 2) {
+		nfacct_perror("too many arguments");
+		return -1;
+	}
+
+	msg = nlmsg_alloc();
+	if (!msg)
+		return -1;
+
+	ret = nfnlmsg_put(msg,
+			NL_AUTO_PID,
+			NL_AUTO_SEQ,
+			NFNL_SUBSYS_ACCT,
+			NFNL_MSG_ACCT_DEL,
+			NLM_F_ACK | NLM_F_REQUEST,
+			AF_UNSPEC,
+			0);
+
+	if (ret) {
+		NL_DBG(2, "Can't append payload to message: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	handle = nl_handle_alloc();
+	if ((ret = nfnl_connect(handle))) {
+		NL_DBG(2, "Can't connect handle: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail;
+	}
+
+	if ((ret = nl_send_auto_complete(handle, msg)) < 0) {
+		NL_DBG(2, "Can't send msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+		goto fail_send;
+        }
+
+	ret = nl_recvmsgs_default(handle);
+	if (ret < 0) {
+		NL_DBG(2, "Can't receice msg: %s line: %d\n",
+							__FUNCTION__, __LINE__);
+	}
+
+fail_send:
+	nl_close(handle);
+	nl_handle_destroy(handle);
+fail:
+	nlmsg_free(msg);
+	return ret;
+}
+
+static const char version_msg[] =
+	"nfacct v%s: utility for the Netfilter extended accounting "
+	"infrastructure\n"
+	"Copyright (C) 2011 Pablo Neira Ayuso <pablo@netfilter.org>\n"
+	"Copyright (C) 2011 Intra2net AG <http://www.intra2net.com>\n"
+	"Copyright (C) 2013 Mathieu Poirier <mathieu.poirier@linaro.org>\n"
+	"This program comes with ABSOLUTELY NO WARRANTY.\n"
+	"This is free software, and you are welcome to redistribute it under "
+	"certain \nconditions; see LICENSE file distributed in this package "
+	"for details.\n";
+
+static int nfacct_cmd_version(int argc, char *argv[])
+{
+	printf(version_msg, VERSION);
+	return 0;
+}
+
+static const char help_msg[] =
+	"nfacct v%s: utility for the Netfilter extended accounting "
+	"infrastructure\n"
+	"Usage: %s command [parameters]...\n\n"
+	"Commands:\n"
+	"  list [reset]\t\tList the accounting object table (and reset)\n"
+	"  add object-name\tAdd new accounting object to table\n"
+	"  delete object-name\tDelete existing accounting object\n"
+	"  get object-name\tGet existing accounting object\n"
+	"  flush\t\t\tFlush accounting object table\n"
+	"  restore\t\tRestore accounting object table reading 'list' output from stdin\n"
+	"  version\t\tDisplay version and disclaimer\n"
+	"  help\t\t\tDisplay this help message\n";
+
+static int nfacct_cmd_help(int argc, char *argv[])
+{
+	printf(help_msg, VERSION, argv[0]);
+	return 0;
+}
+
+static int nfacct_cmd_restore(int argc, char *argv[])
+{
+	uint64_t pkts, bytes;
+	char name[512];
+	char buffer[512];
+	int ret;
+	while (fgets(buffer, sizeof(buffer), stdin)) {
+		char *semicolon = strchr(buffer, ';');
+		if (semicolon == NULL) {
+			nfacct_perror("invalid line");
+			return -1;
+		}
+		*semicolon = 0;
+		ret = sscanf(buffer, "{ pkts = %llu, bytes = %llu } = %s",
+		       &pkts, &bytes, name);
+		if (ret != 3) {
+			nfacct_perror("error reading input");
+			return -1;
+		}
+		if ((ret = _nfacct_cmd_add(name, pkts, bytes)) != 0)
+			return ret;
+
+	}
+	return 0;
+}