ping.h File Reference

ICMP ping protocol. More...

#include <ipxe/iobuf.h>
#include <ipxe/tcpip.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
int	ping_rx (struct io_buffer *iobuf, struct sockaddr_tcpip *st_src)
	Process ICMP ping reply. More...

Detailed Description

ICMP ping protocol.

Definition in file ping.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

ping_rx()

int ping_rx	(	struct io_buffer *	iobuf,
		struct sockaddr_tcpip *	st_src
	)

Process ICMP ping reply.

Parameters

iobuf	I/O buffer
st_src	Source address

Return values

rc	Return status code

Definition at line 103 of file ping.c.

                                                                       {
        struct icmp_echo *echo = iobuf->data;
        struct ping_connection *ping;
        struct xfer_metadata meta;
        int rc;

        /* Sanity check: should already have been checked by ICMP layer */
        assert ( iob_len ( iobuf ) >= sizeof ( *echo ) );

        /* Identify connection */
        ping = ping_demux ( ntohs ( echo->ident ) );
        DBGC ( ping, "PING %p reply id %#04x seq %#04x\n",
               ping, ntohs ( echo->ident ), ntohs ( echo->sequence ) );
        if ( ! ping ) {
                rc = -ENOTCONN;
                goto discard;
        }

        /* Strip header, construct metadata, and pass data to upper layer */
        iob_pull ( iobuf, sizeof ( *echo ) );
        memset ( &meta, 0, sizeof ( meta ) );
        meta.src = ( ( struct sockaddr * ) st_src );
        meta.flags = XFER_FL_ABS_OFFSET;
        meta.offset = ntohs ( echo->sequence );
        return xfer_deliver ( &ping->xfer, iob_disown ( iobuf ), &meta );

 discard:
        free_iob ( iobuf );
        return rc;
}

References assert(), io_buffer::data, DBGC, echo(), ENOTCONN, free_iob(), iob_disown, iob_len(), iob_pull, memset(), meta, ntohs, ping(), ping_demux(), rc, xfer_deliver(), and XFER_FL_ABS_OFFSET.