[altq 542] qop_add_filter() in qop.c

["Hao Zhang" <zhanghao@nortelnetworks.com>]

Title: qop_add_filter() in qop.c

I am writing a code to set up a filter in terms of label. When the code runs, it encounters problem at following line of qop_add_filter() in libaltq/qop.c

if (error =(*ifinfo->qdisc->add_filter)(fltrinfo) != 0) {
        remove_filter_rule(ifinfo, fltrinfo);
        goto err_ret;
}

At this point error is returned a value of 1, which is "syscall error" in qop_errorlist[].

Can anyone give me some information about how ifinfo->qdisc->add_filter(fltrinfo)works. Thanks in advance.

------------------------------------
Hao Zhang
Advanced Wireless Network Technology
Nortel Networks
Tel:    613-765-3972 (ESN 395)
Fax:    613-763-2686
email:  zhanghao@nortelnetworks.com