static int em_text_match(struct sk_buff *skb, struct tcf_ematch *m,
struct tcf_pkt_info *info)
{
struct text_match *tm = EM_TEXT_PRIV(m);
int from, to;
struct ts_state state;
from = tcf_get_base_ptr(skb, tm->from_layer) - skb->data;
from += tm->from_offset;
to = tcf_get_base_ptr(skb, tm->to_layer) - skb->data;
to += tm->to_offset;
return skb_find_text(skb, from, to, tm->config, &state) != UINT_MAX;
}
static int em_cmp_match(struct sk_buff *skb, struct tcf_ematch *em,
struct tcf_pkt_info *info)
{
struct tcf_em_cmp *cmp = (struct tcf_em_cmp *) em->data;
unsigned char *ptr = tcf_get_base_ptr(skb, cmp->layer) + cmp->off;
u32 val = 0;
if (!tcf_valid_offset(skb, ptr, cmp->align))
return 0;
switch (cmp->align) {
case TCF_EM_ALIGN_U8:
val = *ptr;
break;
case TCF_EM_ALIGN_U16:
val = *ptr << 8;
val |= *(ptr+1);
if (cmp_needs_transformation(cmp))
val = be16_to_cpu(val);
break;
case TCF_EM_ALIGN_U32:
/* Worth checking boundries? The branching seems
* to get worse. Visit again. */
val = *ptr << 24;
val |= *(ptr+1) << 16;
val |= *(ptr+2) << 8;
val |= *(ptr+3);
if (cmp_needs_transformation(cmp))
val = be32_to_cpu(val);
break;
default:
return 0;
}
if (cmp->mask)
val &= cmp->mask;
switch (cmp->opnd) {
case TCF_EM_OPND_EQ:
return val == cmp->val;
case TCF_EM_OPND_LT:
return val < cmp->val;
case TCF_EM_OPND_GT:
return val > cmp->val;
}
return 0;
}
static int em_nbyte_match(struct sk_buff *skb, struct tcf_ematch *em,
struct tcf_pkt_info *info)
{
struct nbyte_data *nbyte = (struct nbyte_data *) em->data;
unsigned char *ptr = tcf_get_base_ptr(skb, nbyte->hdr.layer);
ptr += nbyte->hdr.off;
if (!tcf_valid_offset(skb, ptr, nbyte->hdr.len))
return 0;
return !memcmp(ptr + nbyte->hdr.off, nbyte->pattern, nbyte->hdr.len);
}
static int em_cmp_match(struct sk_buff *skb, struct tcf_ematch *em,
struct tcf_pkt_info *info)
{
struct tcf_em_cmp *cmp = (struct tcf_em_cmp *) em->data;
unsigned char *ptr = tcf_get_base_ptr(skb, cmp->layer) + cmp->off;
u32 val = 0;
if (!tcf_valid_offset(skb, ptr, cmp->align))
return 0;
switch (cmp->align) {
case TCF_EM_ALIGN_U8:
val = *ptr;
break;
case TCF_EM_ALIGN_U16:
val = get_unaligned_be16(ptr);
if (cmp_needs_transformation(cmp))
val = be16_to_cpu(val);
break;
case TCF_EM_ALIGN_U32:
val = get_unaligned_be32(ptr);
if (cmp_needs_transformation(cmp))
val = be32_to_cpu(val);
break;
default:
return 0;
}
if (cmp->mask)
val &= cmp->mask;
switch (cmp->opnd) {
case TCF_EM_OPND_EQ:
return val == cmp->val;
case TCF_EM_OPND_LT:
return val < cmp->val;
case TCF_EM_OPND_GT:
return val > cmp->val;
}
return 0;
}