/* Creates and returns an OpenFlow message of type OFPT_ERROR that conveys the
* given 'error'.
*
* 'oh->version' determines the OpenFlow version of the error reply.
* 'oh->xid' determines the xid of the error reply.
* The error reply will contain an initial subsequence of 'oh', up to
* 'oh->length' or 64 bytes, whichever is shorter.
*
* This function isn't appropriate for encoding OFPET_HELLO_FAILED error
* messages. Use ofperr_encode_hello() instead. */
struct ofpbuf *
ofperr_encode_reply(enum ofperr error, const struct ofp_header *oh)
{
uint16_t len = ntohs(oh->length);
return ofperr_encode_msg__(error, oh->version, oh->xid, oh, MIN(len, 64));
}
/* Creates and returns an OpenFlow message of type OFPT_ERROR that conveys the
* given 'error', in the error domain 'domain'. The error message will include
* the additional null-terminated text string 's'.
*
* If 'version' is an unknown version then OFP10_VERSION is used.
* OFPET_HELLO_FAILED error messages are supposed to be backward-compatible,
* so in theory this should work. */
struct ofpbuf *
ofperr_encode_hello(enum ofperr error, enum ofp_version ofp_version,
const char *s)
{
return ofperr_encode_msg__(error, ofp_version, htonl(0), s, strlen(s));
}
/* Creates and returns an OpenFlow message of type OFPT_ERROR that conveys the
* given 'error'.
*
* 'oh->version' determines the OpenFlow version of the error reply.
* 'oh->xid' determines the xid of the error reply.
* The error reply will contain an initial subsequence of 'oh', up to
* 'oh->length' (or however much fits).
*
* This function isn't appropriate for encoding OFPET_HELLO_FAILED error
* messages. Use ofperr_encode_hello() instead. */
struct ofpbuf *
ofperr_encode_reply(enum ofperr error, const struct ofp_header *oh)
{
return ofperr_encode_msg__(error, oh->version, oh->xid,
oh, ntohs(oh->length));
}