u32 error0 = (u32) ~ 0;
u32 sw_if_index = 0;
u32 original_sw_if_index = 0;
- u8 *end = NULL;
u32 fib_index;
dhcp_proxy_t *proxy;
dhcp_server_t *server;
u32 rx_sw_if_index;
- dhcp_option_t *o;
+ dhcp_option_t *o, *end;
u32 len = 0;
- vlib_buffer_free_list_t *fl;
u8 is_discover = 0;
+ int space_left;
bi0 = from[0];
from += 1;
}
rx_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-
fib_index = im->fib_index_by_sw_if_index[rx_sw_if_index];
proxy = dhcp_get_proxy (dpm, fib_index, FIB_PROTOCOL_IP4);
goto do_trace;
}
+ space_left = vlib_buffer_chain_linearize (vm, b0);
+ /* cant parse chains...
+ * and we need some space for option 82*/
+ if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 ||
+ space_left < VPP_DHCP_OPTION82_SIZE)
+ {
+ error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
+ next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
+ pkts_too_big++;
+ goto do_trace;
+ }
+
server = &proxy->dhcp_servers[0];
vlib_buffer_advance (b0, -(sizeof (*ip0)));
ip0 = vlib_buffer_get_current (b0);
/* Send to DHCP server via the configured FIB */
vnet_buffer (b0)->sw_if_index[VLIB_TX] = server->server_fib_index;
- h0->gateway_ip_address.as_u32 = proxy->dhcp_src_address.ip4.as_u32;
+ h0->gateway_ip_address = proxy->dhcp_src_address.ip4;
pkts_to_server++;
- o = (dhcp_option_t *) h0->options;
-
- fib_index = im->fib_index_by_sw_if_index
- [vnet_buffer (b0)->sw_if_index[VLIB_RX]];
+ o = h0->options;
+ end = (void *) vlib_buffer_get_tail (b0);
- end = b0->data + b0->current_data + b0->current_length;
/* TLVs are not performance-friendly... */
- while (o->option != 0xFF /* end of options */ && (u8 *) o < end)
+ while (o->option != DHCP_PACKET_OPTION_END && o < end)
{
if (DHCP_PACKET_OPTION_MSG_TYPE == o->option)
{
is_discover = 1;
}
}
- o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
+ o = (dhcp_option_t *) (o->data + o->length);
}
- fl =
- vlib_buffer_get_free_list (vm,
- vlib_buffer_get_free_list_index (b0));
- // start write at (option*)o, some packets have padding
- if (((u8 *) o - (u8 *) b0->data + VPP_DHCP_OPTION82_SIZE) >
- fl->n_data_bytes)
- {
- next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
- pkts_too_big++;
- goto do_trace;
- }
-
- if ((o->option == 0xFF) && ((u8 *) o <= end))
+ if (o->option == DHCP_PACKET_OPTION_END && o <= end)
{
vnet_main_t *vnm = vnet_get_main ();
u16 old_l0, new_l0;
ip4_address_t _ia0, *ia0 = &_ia0;
dhcp_vss_t *vss;
vnet_sw_interface_t *swif;
- sw_if_index = 0;
- original_sw_if_index = 0;
original_sw_if_index = sw_if_index =
vnet_buffer (b0)->sw_if_index[VLIB_RX];
o->data[7] = 4; /* length 4 */
u32 *o_addr = (u32 *) & o->data[8];
*o_addr = ia0->as_u32;
- o->data[12] = 0xFF;
+ o->data[12] = DHCP_PACKET_OPTION_END;
vss = dhcp_get_vss_info (dpm, fib_index, FIB_PROTOCOL_IP4);
if (vss)
o->data[14] = vss->vss_type; /* vss option type */
o->data[15 + id_len] = 152; /* vss control suboption */
o->data[16 + id_len] = 0; /* length */
- o->data[17 + id_len] = 0xFF; /* "end-of-options" (0xFF) */
+ o->data[17 + id_len] = DHCP_PACKET_OPTION_END; /* "end-of-options" (0xFF) */
/* 5 bytes for suboption headers 151+len, 152+len and 0xFF */
o->length += id_len + 5;
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
-
vlib_node_increment_counter (vm, dhcp_proxy_to_server_node.index,
DHCP_PROXY_ERROR_RELAY_TO_CLIENT,
pkts_to_client);
if (1 /* dpm->insert_option_82 */ )
{
- dhcp_option_t *o = (dhcp_option_t *) h0->options;
- dhcp_option_t *sub;
+ /* linearize needed to "unclone" and scan options */
+ int space_left = vlib_buffer_chain_linearize (vm, b0);
+ if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 || space_left < 0)
+ {
+ error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
+ goto drop_packet;
+ }
+
+ dhcp_option_t *o = h0->options, *end =
+ (void *) vlib_buffer_get_tail (b0);
/* Parse through TLVs looking for option 82.
The circuit-ID is the FIB number we need
to track down the client-facing interface */
- while (o->option != 0xFF /* end of options */ &&
- (u8 *) o <
- (b0->data + b0->current_data + b0->current_length))
+ while (o->option != DHCP_PACKET_OPTION_END && o < end)
{
if (o->option == 82)
{
u32 vss_exist = 0;
u32 vss_ctrl = 0;
- sub = (dhcp_option_t *) & o->data[0];
- while (sub->option != 0xFF /* end of options */ &&
- (u8 *) sub < (u8 *) (o + o->length))
+ dhcp_option_t *sub = (dhcp_option_t *) & o->data[0];
+ dhcp_option_t *subend =
+ (dhcp_option_t *) (o->data + o->length);
+ while (sub->option != DHCP_PACKET_OPTION_END
+ && sub < subend)
{
/* If this is one of ours, it will have
total length 12, circuit-id suboption type,
vss_exist = 1;
else if (sub->option == 152 && sub->length == 0)
vss_ctrl = 1;
- sub = (dhcp_option_t *)
- (((uword) sub) + (sub->length + 2));
+ sub = (dhcp_option_t *) (sub->data + sub->length);
}
if (vss_ctrl && vss_exist)
vlib_node_increment_counter
DHCP_PROXY_ERROR_OPTION_82_VSS_NOT_PROCESSED, 1);
}
- o = (dhcp_option_t *) (((uword) o) + (o->length + 2));
+ o = (dhcp_option_t *) (o->data + o->length);
}
}
tr->sw_if_index = sw_if_index;
}
}
+
return from_frame->n_vectors;
}
Code Review / vpp.git / blobdiff