rte_pcapng.h - Man Page
Synopsis
#include <stdint.h>
#include <sys/types.h>
#include <rte_mempool.h>
Enumerations
enum rte_pcapng_direction
Functions
rte_pcapng_t * rte_pcapng_fdopen (int fd, const char *osname, const char *hardware, const char *appname, const char *comment)
void rte_pcapng_close (rte_pcapng_t *self)
int rte_pcapng_add_interface (rte_pcapng_t *self, uint16_t port, const char *ifname, const char *ifdescr, const char *filter)
struct rte_mbuf * rte_pcapng_copy (uint16_t port_id, uint32_t queue, const struct rte_mbuf *m, struct rte_mempool *mp, uint32_t length, enum rte_pcapng_direction direction, const char *comment)
uint32_t rte_pcapng_mbuf_size (uint32_t length)
ssize_t rte_pcapng_write_packets (rte_pcapng_t *self, struct rte_mbuf *pkts[], uint16_t nb_pkts)
ssize_t rte_pcapng_write_stats (rte_pcapng_t *self, uint16_t port, uint64_t ifrecv, uint64_t ifdrop, const char *comment)
Detailed Description
RTE pcapng
Pcapng is an evolution from the pcap format, created to address some of its deficiencies. Namely, the lack of extensibility and inability to store additional information.
For details about the file format see RFC: https://www.ietf.org/id/draft-tuexen-opsawg-pcapng-03.html and https://github.com/pcapng/pcapng/
Definition in file rte_pcapng.h.
Enumeration Type Documentation
enum rte_pcapng_direction
Direction flag These should match Enhanced Packet Block flag bits
Definition at line 95 of file rte_pcapng.h.
Function Documentation
rte_pcapng_t * rte_pcapng_fdopen (int fd, const char * osname, const char * hardware, const char * appname, const char * comment)
Write data to existing open file
- Parameters
fd file descriptor
osname Optional description of the operating system. Examples: 'Debian 11', 'Windows Server 22'
hardware Optional description of the hardware used to create this file. Examples: 'x86 Virtual Machine'
appname Optional: application name recorded in the pcapng file. Example: 'dpdk-dumpcap 1.0 (DPDK 20.11)'
comment Optional comment to add to file header.- Returns
handle to library, or NULL in case of error (and rte_errno is set).
void rte_pcapng_close (rte_pcapng_t * self)
Close capture file
- Parameters
self handle to library
int rte_pcapng_add_interface (rte_pcapng_t * self, uint16_t port, const char * ifname, const char * ifdescr, const char * filter)
Add interface information to the capture file
- Parameters
self The handle to the packet capture file
port The Ethernet port to report stats on.
ifname (optional) Interface name to record in the file. If not specified, name will be constructed from port
ifdescr (optional) Interface description to record in the file.
filter Capture filter to record in the file.
Interfaces must be added to the output file after opening and before any packet record. All ports used in packet capture must be added.
struct rte_mbuf * rte_pcapng_copy (uint16_t port_id, uint32_t queue, const struct rte_mbuf * m, struct rte_mempool * mp, uint32_t length, enum rte_pcapng_direction direction, const char * comment)
Format an mbuf for writing to file.
- Parameters
port_id The Ethernet port on which packet was received or is going to be transmitted.
queue The queue on the Ethernet port where packet was received or is going to be transmitted.
mp The mempool from which the 'clone' mbufs are allocated.
m The mbuf to copy
length The upper limit on bytes to copy. Passing UINT32_MAX means all data (after offset).
direction The direction of the packer: receive, transmit or unknown.
comment Packet comment.- Returns
- The pointer to the new mbuf formatted for pcapng_write
- NULL if allocation fails.
uint32_t rte_pcapng_mbuf_size (uint32_t length)
Determine optimum mbuf data size.
- Parameters
length The largest packet that will be copied.
- Returns
The minimum size of mbuf data to handle packet with length bytes. Accounting for required header and trailer fields
ssize_t rte_pcapng_write_packets (rte_pcapng_t * self, struct rte_mbuf * pkts[], uint16_t nb_pkts)
Write packets to the capture file.
Packets to be captured are copied by rte_pcapng_copy() and then this function is called to write them to the file.
- Warning
Do not pass original mbufs from transmit or receive or file will be invalid pcapng format.
- Parameters
self The handle to the packet capture file
pkts The address of an array of nb_pkts pointers to rte_mbuf structures which contain the output packets
nb_pkts The number of packets to write to the file.- Returns
The number of bytes written to file, -1 on failure to write file. The mbuf's in pkts are always freed.
ssize_t rte_pcapng_write_stats (rte_pcapng_t * self, uint16_t port, uint64_t ifrecv, uint64_t ifdrop, const char * comment)
Write an Interface statistics block. For statistics, use 0 if don't know or care to report it. Should be called before closing capture to report results.
- Parameters
self The handle to the packet capture file
port The Ethernet port to report stats on.
ifrecv The number of packets received by capture. Optional: use UINT64_MAX if not known.
ifdrop The number of packets missed by the capture process. Optional: use UINT64_MAX if not known.
comment Optional comment to add to statistics.- Returns
number of bytes written to file, -1 on failure to write file
Author
Generated automatically by Doxygen for DPDK from the source code.
Referenced By
The man pages rte_pcapng_add_interface(3), rte_pcapng_close(3), rte_pcapng_copy(3), rte_pcapng_direction(3), rte_pcapng_fdopen(3), rte_pcapng_mbuf_size(3), rte_pcapng_write_packets(3) and rte_pcapng_write_stats(3) are aliases of rte_pcapng.h(3).