nfacct: Initial check-in
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.
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;
+}