Retry-After header parser issue

[gangban.lau@xxxxxxxxx (Gang Liu)]

Hello,
       currently pjsip parser couldn't handle incorrect format value of
Retry-After header.For example,
Retry-After: 30 ((bad value))
Retry-After: 8 (retry) bad
It is better to bypass current char when it isn't '(' and ';'  inside
looping.

    while (!pj_scan_is_eof(scanner) && *scanner->curptr!='\r' &&
           *scanner->curptr!='\n')
    {
        if (*scanner->curptr=='(') {
            pj_scan_get_quote(scanner, '(', ')', &hdr->comment);
            /* Trim the leading and ending parens */
            hdr->comment.ptr++;
            hdr->comment.slen -= 2;
        } else if (*scanner->curptr==';') {
            pjsip_param *prm = PJ_POOL_ALLOC_T(ctx->pool, pjsip_param);
            int_parse_param(scanner, ctx->pool, &prm->name, &prm->value, 0);
            pj_list_push_back(&hdr->param, prm);
        }
    else
        pj_scan_get_char(scanner);   /* ++++++++++++++++++++++++++ not
standard header value, go next */
   }

regards,
Gang
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