#include "dpdk_priv.h"
+/**
+ * @file
+ * @brief CLI for DPDK Abstraction Layer and pcap Tx Trace.
+ *
+ * This file contains the source code for CLI for DPDK
+ * Abstraction Layer and pcap Tx Trace.
+ */
+
static clib_error_t *
pcap_trace_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
+#define PCAP_DEF_PKT_TO_CAPTURE (100)
+
+ unformat_input_t _line_input, *line_input = &_line_input;
dpdk_main_t *dm = &dpdk_main;
u8 *filename;
- u32 max;
- int matched = 0;
+ u8 *chroot_filename = 0;
+ u32 max = 0;
+ int enabled = 0;
+ int errorFlag = 0;
clib_error_t *error = 0;
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
- if (unformat (input, "on"))
+ if (unformat (line_input, "on"))
{
if (dm->tx_pcap_enable == 0)
{
- if (dm->pcap_filename == 0)
- dm->pcap_filename = format (0, "/tmp/vpe.pcap%c", 0);
-
- memset (&dm->pcap_main, 0, sizeof (dm->pcap_main));
- dm->pcap_main.file_name = (char *) dm->pcap_filename;
- dm->pcap_main.n_packets_to_capture = 100;
- if (dm->pcap_pkts_to_capture)
- dm->pcap_main.n_packets_to_capture = dm->pcap_pkts_to_capture;
-
- dm->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
- dm->tx_pcap_enable = 1;
- matched = 1;
- vlib_cli_output (vm, "pcap tx capture on...");
+ enabled = 1;
}
else
{
vlib_cli_output (vm, "pcap tx capture already on...");
+ errorFlag = 1;
+ break;
}
- matched = 1;
}
- else if (unformat (input, "off"))
+ else if (unformat (line_input, "off"))
{
if (dm->tx_pcap_enable)
{
else
vlib_cli_output (vm, "saved to %s...", dm->pcap_filename);
}
+
+ dm->tx_pcap_enable = 0;
}
else
{
vlib_cli_output (vm, "pcap tx capture already off...");
+ errorFlag = 1;
+ break;
}
-
- dm->tx_pcap_enable = 0;
- matched = 1;
}
- else if (unformat (input, "max %d", &max))
+ else if (unformat (line_input, "max %d", &max))
{
- dm->pcap_pkts_to_capture = max;
- matched = 1;
+ if (dm->tx_pcap_enable)
+ {
+ vlib_cli_output (vm,
+ "can't change max value while pcap tx capture active...");
+ errorFlag = 1;
+ break;
+ }
}
-
- else if (unformat (input, "intfc %U",
+ else if (unformat (line_input, "intfc %U",
unformat_vnet_sw_interface, dm->vnet_main,
&dm->pcap_sw_if_index))
- matched = 1;
- else if (unformat (input, "intfc any"))
+ ;
+
+ else if (unformat (line_input, "intfc any"))
{
dm->pcap_sw_if_index = 0;
- matched = 1;
}
- else if (unformat (input, "file %s", &filename))
+ else if (unformat (line_input, "file %s", &filename))
{
- u8 *chroot_filename;
+ if (dm->tx_pcap_enable)
+ {
+ vlib_cli_output (vm,
+ "can't change file while pcap tx capture active...");
+ errorFlag = 1;
+ break;
+ }
+
/* Brain-police user path input */
if (strstr ((char *) filename, "..")
|| index ((char *) filename, '/'))
{
vlib_cli_output (vm, "illegal characters in filename '%s'",
filename);
- continue;
+ vlib_cli_output (vm,
+ "Hint: Only filename, do not enter directory structure.");
+ vec_free (filename);
+ errorFlag = 1;
+ break;
}
chroot_filename = format (0, "/tmp/%s%c", filename, 0);
vec_free (filename);
-
- if (dm->pcap_filename)
- vec_free (dm->pcap_filename);
- vec_add1 (filename, 0);
- dm->pcap_filename = chroot_filename;
- matched = 1;
}
- else if (unformat (input, "status"))
+ else if (unformat (line_input, "status"))
{
+ if (dm->pcap_sw_if_index == 0)
+ {
+ vlib_cli_output (vm, "max is %d for any interface to file %s",
+ dm->
+ pcap_pkts_to_capture ? dm->pcap_pkts_to_capture
+ : PCAP_DEF_PKT_TO_CAPTURE,
+ dm->
+ pcap_filename ? dm->pcap_filename : (u8 *)
+ "/tmp/vpe.pcap");
+ }
+ else
+ {
+ vlib_cli_output (vm, "max is %d for interface %U to file %s",
+ dm->
+ pcap_pkts_to_capture ? dm->pcap_pkts_to_capture
+ : PCAP_DEF_PKT_TO_CAPTURE,
+ format_vnet_sw_if_index_name, dm->vnet_main,
+ dm->pcap_sw_if_index,
+ dm->
+ pcap_filename ? dm->pcap_filename : (u8 *)
+ "/tmp/vpe.pcap");
+ }
+
if (dm->tx_pcap_enable == 0)
{
vlib_cli_output (vm, "pcap tx capture is off...");
- continue;
}
-
- vlib_cli_output (vm, "pcap tx capture: %d of %d pkts...",
- dm->pcap_main.n_packets_captured,
- dm->pcap_main.n_packets_to_capture);
- matched = 1;
+ else
+ {
+ vlib_cli_output (vm, "pcap tx capture is on: %d of %d pkts...",
+ dm->pcap_main.n_packets_captured,
+ dm->pcap_main.n_packets_to_capture);
+ }
+ break;
}
else
- break;
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ errorFlag = 1;
+ break;
+ }
}
+ unformat_free (line_input);
- if (matched == 0)
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- return 0;
+ if (errorFlag == 0)
+ {
+ /* Since no error, save configured values. */
+ if (chroot_filename)
+ {
+ if (dm->pcap_filename)
+ vec_free (dm->pcap_filename);
+ vec_add1 (chroot_filename, 0);
+ dm->pcap_filename = chroot_filename;
+ }
+
+ if (max)
+ dm->pcap_pkts_to_capture = max;
+
+
+ if (enabled)
+ {
+ if (dm->pcap_filename == 0)
+ dm->pcap_filename = format (0, "/tmp/vpe.pcap%c", 0);
+
+ memset (&dm->pcap_main, 0, sizeof (dm->pcap_main));
+ dm->pcap_main.file_name = (char *) dm->pcap_filename;
+ dm->pcap_main.n_packets_to_capture = PCAP_DEF_PKT_TO_CAPTURE;
+ if (dm->pcap_pkts_to_capture)
+ dm->pcap_main.n_packets_to_capture = dm->pcap_pkts_to_capture;
+
+ dm->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
+ dm->tx_pcap_enable = 1;
+ vlib_cli_output (vm, "pcap tx capture on...");
+ }
+ }
+ else if (chroot_filename)
+ vec_free (chroot_filename);
+
+
+ return error;
}
+/*?
+ * This command is used to start or stop a packet capture, or show
+ * the status of packet capture.
+ *
+ * This command has the following optional parameters:
+ *
+ * - <b>on|off</b> - Used to start or stop a packet capture.
+ *
+ * - <b>max <nn></b> - Depth of local buffer. Once '<em>nn</em>' number
+ * of packets have been received, buffer is flushed to file. Once another
+ * '<em>nn</em>' number of packets have been received, buffer is flushed
+ * to file, overwriting previous write. If not entered, value defaults
+ * to 100. Can only be updated if packet capture is off.
+ *
+ * - <b>intfc <interface>|any</b> - Used to specify a given interface,
+ * or use '<em>any</em>' to run packet capture on all interfaces.
+ * '<em>any</em>' is the default if not provided. Settings from a previous
+ * packet capture are preserved, so '<em>any</em>' can be used to reset
+ * the interface setting.
+ *
+ * - <b>file <name></b> - Used to specify the output filename. The file will
+ * be placed in the '<em>/tmp</em>' directory, so only the filename is
+ * supported. Directory should not be entered. If file already exists, file
+ * will be overwritten. If no filename is provided, '<em>/tmp/vpe.pcap</em>'
+ * will be used. Can only be updated if packet capture is off.
+ *
+ * - <b>status</b> - Displays the current status and configured attributes
+ * associated with a packet capture. If packet capture is in progress,
+ * '<em>status</em>' also will return the number of packets currently in
+ * the local buffer. All additional attributes entered on command line
+ * with '<em>status</em>' will be ingnored and not applied.
+ *
+ * @cliexpar
+ * Example of how to display the status of a tx packet capture when off:
+ * @cliexstart{pcap tx trace status}
+ * max is 100, for any interface to file /tmp/vpe.pcap
+ * pcap tx capture is off...
+ * @cliexend
+ * Example of how to start a tx packet capture:
+ * @cliexstart{pcap tx trace on max 35 intfc GigabitEthernet0/8/0 file vppTest.pcap}
+ * pcap tx capture on...
+ * @cliexend
+ * Example of how to display the status of a tx packet capture in progress:
+ * @cliexstart{pcap tx trace status}
+ * max is 35, for interface GigabitEthernet0/8/0 to file /tmp/vppTest.pcap
+ * pcap tx capture is on: 20 of 35 pkts...
+ * @cliexend
+ * Example of how to stop a tx packet capture:
+ * @cliexstart{vppctl pcap tx trace off}
+ * captured 21 pkts...
+ * saved to /tmp/vppTest.pcap...
+ * @cliexend
+?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (pcap_trace_command, static) = {
.path = "pcap tx trace",
.short_help =
- "pcap tx trace on off max <nn> intfc <intfc> file <name> status",
+ "pcap tx trace [on|off] [max <nn>] [intfc <interface>|any] [file <name>] [status]",
.function = pcap_trace_command_fn,
};
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff