передать пакет (transmit a packet)
Имя (Name)
pcap_inject, pcap_sendpacket - transmit a packet
Синопсис (Synopsis)
#include <pcap/pcap.h>
int pcap_inject(pcap_t *p, const void *buf, size_t size);
int pcap_sendpacket(pcap_t *p, const u_char *buf, int size);
Описание (Description)
pcap_inject() sends a raw packet through the network interface;
buf points to the data of the packet, including the link-layer
header, and size is the number of bytes in the packet.
Note that, even if you successfully open the network interface,
you might not have permission to send packets on it, or it might
not support sending packets; as pcap_open_live(3PCAP) doesn't
have a flag to indicate whether to open for capturing, sending,
or capturing and sending, you cannot request an open that
supports sending and be notified at open time whether sending
will be possible. Note also that some devices might not support
sending packets.
Note that, on some platforms, the link-layer header of the packet
that's sent might not be the same as the link-layer header of the
packet supplied to pcap_inject(), as the source link-layer
address, if the header contains such an address, might be changed
to be the address assigned to the interface on which the packet
it sent, if the platform doesn't support sending completely raw
and unchanged packets. Even worse, some drivers on some
platforms might change the link-layer type field to whatever
value libpcap used when attaching to the device, even on
platforms that do nominally support sending completely raw and
unchanged packets.
pcap_sendpacket() is like pcap_inject(), but it returns 0 on
success, rather than returning the number of bytes written.
(pcap_inject() comes from OpenBSD; pcap_sendpacket() comes from
WinPcap/Npcap. Both are provided for compatibility.)
Возвращаемое значение (Return value)
pcap_inject() returns the number of bytes written on success and
PCAP_ERROR on failure.
pcap_sendpacket() returns 0 on success and PCAP_ERROR on failure.
If PCAP_ERROR is returned, pcap_geterr(3PCAP) or
pcap_perror(3PCAP) may be called with p as an argument to fetch
or display the error text.
Смотри также (See also)
pcap(3PCAP)
