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-rw-r--r--src/vnet/ip/ip4_packet.h4
-rw-r--r--src/vnet/ip/ip4_to_ip6.h225
-rw-r--r--src/vnet/ip/ip6_packet.h61
-rw-r--r--src/vnet/ip/ip6_to_ip4.h325
-rw-r--r--src/vnet/ip/reass/ip4_sv_reass.c208
-rw-r--r--src/vnet/ip/reass/ip4_sv_reass.h2
-rw-r--r--src/vnet/ip/reass/ip6_sv_reass.c100
7 files changed, 413 insertions, 512 deletions
diff --git a/src/vnet/ip/ip4_packet.h b/src/vnet/ip/ip4_packet.h
index 79cf22c4d70..1d3607ea34c 100644
--- a/src/vnet/ip/ip4_packet.h
+++ b/src/vnet/ip/ip4_packet.h
@@ -196,13 +196,13 @@ typedef union
#define IP4_ROUTER_ALERT_OPTION 20
-always_inline int
+always_inline u16
ip4_get_fragment_offset (const ip4_header_t * i)
{
return clib_net_to_host_u16 (i->flags_and_fragment_offset) & 0x1fff;
}
-always_inline int
+always_inline u16
ip4_get_fragment_more (const ip4_header_t * i)
{
return clib_net_to_host_u16 (i->flags_and_fragment_offset) &
diff --git a/src/vnet/ip/ip4_to_ip6.h b/src/vnet/ip/ip4_to_ip6.h
index b1905e4154b..21538a90e44 100644
--- a/src/vnet/ip/ip4_to_ip6.h
+++ b/src/vnet/ip/ip4_to_ip6.h
@@ -25,8 +25,8 @@
/**
* IPv4 to IPv6 set call back function type
*/
-typedef int (*ip4_to_ip6_set_fn_t) (ip4_header_t * ip4, ip6_header_t * ip6,
- void *ctx);
+typedef int (*ip4_to_ip6_set_fn_t) (vlib_buffer_t * b, ip4_header_t * ip4,
+ ip6_header_t * ip6, void *ctx);
/* *INDENT-OFF* */
static u8 icmp_to_icmp6_updater_pointer_table[] =
@@ -261,7 +261,7 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
sizeof (*inner_frag));
ip6 = vlib_buffer_get_current (p);
memmove (u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)), ip4,
- 20 + 8);
+ 20 + 8);
ip4 =
(ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4));
icmp = (icmp46_header_t *) (ip4 + 1);
@@ -287,7 +287,7 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
vlib_buffer_advance (p, -2 * (sizeof (*ip6) - sizeof (*ip4)));
ip6 = vlib_buffer_get_current (p);
memmove (u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)), ip4,
- 20 + 8);
+ 20 + 8);
ip4 =
(ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4));
icmp = (icmp46_header_t *) u8_ptr_add (ip4, sizeof (*ip4));
@@ -340,7 +340,7 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
inner_ip6->hop_limit = inner_ip4->ttl;
inner_ip6->protocol = inner_ip4->protocol;
- if ((rv = inner_fn (inner_ip4, inner_ip6, inner_ctx)) != 0)
+ if ((rv = inner_fn (p, inner_ip4, inner_ip6, inner_ctx)) != 0)
return rv;
if (PREDICT_FALSE (inner_frag != NULL))
@@ -411,7 +411,7 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
ip6->hop_limit = ip4->ttl;
ip6->protocol = IP_PROTOCOL_ICMP6;
- if ((rv = fn (ip4, ip6, ctx)) != 0)
+ if ((rv = fn (p, ip4, ip6, ctx)) != 0)
return rv;
//Truncate when the packet exceeds the minimal IPv6 MTU
@@ -437,217 +437,4 @@ icmp_to_icmp6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx,
return 0;
}
-/**
- * @brief Translate IPv4 fragmented packet to IPv6.
- *
- * @param p Buffer to translate.
- * @param fn The function to translate header.
- * @param ctx A context passed in the header translate function.
- *
- * @returns 0 on success, non-zero value otherwise.
- */
-always_inline int
-ip4_to_ip6_fragmented (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx)
-{
- ip4_header_t *ip4;
- ip6_header_t *ip6;
- ip6_frag_hdr_t *frag;
- int rv;
-
- ip4 = vlib_buffer_get_current (p);
- frag = (ip6_frag_hdr_t *) u8_ptr_add (ip4, sizeof (*ip4) - sizeof (*frag));
- ip6 =
- (ip6_header_t *) u8_ptr_add (ip4,
- sizeof (*ip4) - sizeof (*frag) -
- sizeof (*ip6));
- vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6) - sizeof (*frag));
-
- //We know that the protocol was one of ICMP, TCP or UDP
- //because the first fragment was found and cached
- frag->next_hdr =
- (ip4->protocol == IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip4->protocol;
- frag->identification = frag_id_4to6 (ip4->fragment_id);
- frag->rsv = 0;
- frag->fragment_offset_and_more =
- ip6_frag_hdr_offset_and_more (ip4_get_fragment_offset (ip4),
- clib_net_to_host_u16
- (ip4->flags_and_fragment_offset) &
- IP4_HEADER_FLAG_MORE_FRAGMENTS);
-
- ip6->ip_version_traffic_class_and_flow_label =
- clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20));
- ip6->payload_length =
- clib_host_to_net_u16 (clib_net_to_host_u16 (ip4->length) -
- sizeof (*ip4) + sizeof (*frag));
- ip6->hop_limit = ip4->ttl;
- ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
-
- if ((rv = fn (ip4, ip6, ctx)) != 0)
- return rv;
-
- return 0;
-}
-
-/**
- * @brief Translate IPv4 UDP/TCP packet to IPv6.
- *
- * @param p Buffer to translate.
- * @param fn The function to translate header.
- * @param ctx A context passed in the header translate function.
- *
- * @returns 0 on success, non-zero value otherwise.
- */
-always_inline int
-ip4_to_ip6_tcp_udp (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx)
-{
- ip4_header_t *ip4;
- ip6_header_t *ip6;
- ip_csum_t csum;
- u16 *checksum;
- ip6_frag_hdr_t *frag;
- u32 frag_id;
- int rv;
- ip4_address_t old_src, old_dst;
-
- ip4 = vlib_buffer_get_current (p);
-
- if (ip4->protocol == IP_PROTOCOL_UDP)
- {
- udp_header_t *udp = ip4_next_header (ip4);
- checksum = &udp->checksum;
-
- //UDP checksum is optional over IPv4 but mandatory for IPv6
- //We do not check udp->length sanity but use our safe computed value instead
- if (PREDICT_FALSE (!*checksum))
- {
- u16 udp_len = clib_host_to_net_u16 (ip4->length) - sizeof (*ip4);
- csum = ip_incremental_checksum (0, udp, udp_len);
- csum = ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len));
- csum =
- ip_csum_with_carry (csum, clib_host_to_net_u16 (IP_PROTOCOL_UDP));
- csum = ip_csum_with_carry (csum, *((u64 *) (&ip4->src_address)));
- *checksum = ~ip_csum_fold (csum);
- }
- }
- else
- {
- tcp_header_t *tcp = ip4_next_header (ip4);
- checksum = &tcp->checksum;
- }
-
- old_src.as_u32 = ip4->src_address.as_u32;
- old_dst.as_u32 = ip4->dst_address.as_u32;
-
- // Deal with fragmented packets
- if (PREDICT_FALSE (ip4->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS)))
- {
- ip6 =
- (ip6_header_t *) u8_ptr_add (ip4,
- sizeof (*ip4) - sizeof (*ip6) -
- sizeof (*frag));
- frag =
- (ip6_frag_hdr_t *) u8_ptr_add (ip4, sizeof (*ip4) - sizeof (*frag));
- frag_id = frag_id_4to6 (ip4->fragment_id);
- vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6) - sizeof (*frag));
- }
- else
- {
- ip6 = (ip6_header_t *) (((u8 *) ip4) + sizeof (*ip4) - sizeof (*ip6));
- vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6));
- frag = NULL;
- }
-
- ip6->ip_version_traffic_class_and_flow_label =
- clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20));
- ip6->payload_length = u16_net_add (ip4->length, -sizeof (*ip4));
- ip6->hop_limit = ip4->ttl;
- ip6->protocol = ip4->protocol;
-
- if (PREDICT_FALSE (frag != NULL))
- {
- frag->next_hdr = ip6->protocol;
- frag->identification = frag_id;
- frag->rsv = 0;
- frag->fragment_offset_and_more = ip6_frag_hdr_offset_and_more (0, 1);
- ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
- ip6->payload_length = u16_net_add (ip6->payload_length, sizeof (*frag));
- }
-
- if ((rv = fn (ip4, ip6, ctx)) != 0)
- return rv;
-
- csum = ip_csum_sub_even (*checksum, old_src.as_u32);
- csum = ip_csum_sub_even (csum, old_dst.as_u32);
- csum = ip_csum_add_even (csum, ip6->src_address.as_u64[0]);
- csum = ip_csum_add_even (csum, ip6->src_address.as_u64[1]);
- csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[0]);
- csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[1]);
- *checksum = ip_csum_fold (csum);
-
- return 0;
-}
-
-/**
- * @brief Translate IPv4 packet to IPv6 (IP header only).
- *
- * @param p Buffer to translate.
- * @param fn The function to translate header.
- * @param ctx A context passed in the header translate function.
- *
- * @returns 0 on success, non-zero value otherwise.
- */
-always_inline int
-ip4_to_ip6 (vlib_buffer_t * p, ip4_to_ip6_set_fn_t fn, void *ctx)
-{
- ip4_header_t *ip4;
- ip6_header_t *ip6;
- ip6_frag_hdr_t *frag;
- u32 frag_id;
- int rv;
-
- ip4 = vlib_buffer_get_current (p);
-
- // Deal with fragmented packets
- if (PREDICT_FALSE (ip4->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS)))
- {
- ip6 =
- (ip6_header_t *) u8_ptr_add (ip4,
- sizeof (*ip4) - sizeof (*ip6) -
- sizeof (*frag));
- frag =
- (ip6_frag_hdr_t *) u8_ptr_add (ip4, sizeof (*ip4) - sizeof (*frag));
- frag_id = frag_id_4to6 (ip4->fragment_id);
- vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6) - sizeof (*frag));
- }
- else
- {
- ip6 = (ip6_header_t *) (((u8 *) ip4) + sizeof (*ip4) - sizeof (*ip6));
- vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6));
- frag = NULL;
- }
-
- ip6->ip_version_traffic_class_and_flow_label =
- clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20));
- ip6->payload_length = u16_net_add (ip4->length, -sizeof (*ip4));
- ip6->hop_limit = ip4->ttl;
- ip6->protocol = ip4->protocol;
-
- if (PREDICT_FALSE (frag != NULL))
- {
- frag->next_hdr = ip6->protocol;
- frag->identification = frag_id;
- frag->rsv = 0;
- frag->fragment_offset_and_more = ip6_frag_hdr_offset_and_more (0, 1);
- ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
- ip6->payload_length = u16_net_add (ip6->payload_length, sizeof (*frag));
- }
-
- if ((rv = fn (ip4, ip6, ctx)) != 0)
- return rv;
-
- return 0;
-}
-
#endif /* __included_ip4_to_ip6_h__ */
diff --git a/src/vnet/ip/ip6_packet.h b/src/vnet/ip/ip6_packet.h
index 2ba55b75e09..e823214dac9 100644
--- a/src/vnet/ip/ip6_packet.h
+++ b/src/vnet/ip/ip6_packet.h
@@ -579,6 +579,67 @@ ip6_ext_header_find (vlib_main_t * vm, vlib_buffer_t * b,
return result;
}
+/*
+ * walk extension headers, looking for a specific extension header and last
+ * extension header, calculating length of all extension headers
+ *
+ * @param vm
+ * @param b buffer to limit search to
+ * @param ip6_header ipv6 header
+ * @param find_hdr extension header to look for (ignored if ext_hdr is NULL)
+ * @param length[out] length of all extension headers
+ * @param ext_hdr[out] extension header of type find_hdr (may be NULL)
+ * @param last_ext_hdr[out] last extension header (may be NULL)
+ *
+ * @return 0 on success, -1 on failure (ext headers crossing buffer boundary)
+ */
+always_inline int
+ip6_walk_ext_hdr (vlib_main_t * vm, vlib_buffer_t * b,
+ const ip6_header_t * ip6_header, u8 find_hdr, u32 * length,
+ ip6_ext_header_t ** ext_hdr,
+ ip6_ext_header_t ** last_ext_hdr)
+{
+ if (!ip6_ext_hdr (ip6_header->protocol))
+ {
+ *length = 0;
+ *ext_hdr = NULL;
+ *last_ext_hdr = NULL;
+ return 0;
+ }
+ *length = 0;
+ ip6_ext_header_t *h = (void *) (ip6_header + 1);
+ if (!vlib_object_within_buffer_data (vm, b, h, ip6_ext_header_len (h)))
+ {
+ return -1;
+ }
+ *length += ip6_ext_header_len (h);
+ *last_ext_hdr = h;
+ *ext_hdr = NULL;
+ if (ip6_header->protocol == find_hdr)
+ {
+ *ext_hdr = h;
+ }
+ while (ip6_ext_hdr (h->next_hdr))
+ {
+ if (h->next_hdr == find_hdr)
+ {
+ h = ip6_ext_next_header (h);
+ *ext_hdr = h;
+ }
+ else
+ {
+ h = ip6_ext_next_header (h);
+ }
+ if (!vlib_object_within_buffer_data (vm, b, h, ip6_ext_header_len (h)))
+ {
+ return -1;
+ }
+ *length += ip6_ext_header_len (h);
+ *last_ext_hdr = h;
+ }
+ return 0;
+}
+
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
u8 next_hdr;
diff --git a/src/vnet/ip/ip6_to_ip4.h b/src/vnet/ip/ip6_to_ip4.h
index d13a0c1f104..17a11e6df0a 100644
--- a/src/vnet/ip/ip6_to_ip4.h
+++ b/src/vnet/ip/ip6_to_ip4.h
@@ -24,8 +24,12 @@
/**
* IPv6 to IPv4 set call back function type
*/
-typedef int (*ip6_to_ip4_set_fn_t) (ip6_header_t * ip6, ip4_header_t * ip4,
- void *ctx);
+typedef int (*ip6_to_ip4_icmp_set_fn_t) (ip6_header_t * ip6,
+ ip4_header_t * ip4, void *ctx);
+
+typedef int (*ip6_to_ip4_tcp_udp_set_fn_t) (vlib_buffer_t * b,
+ ip6_header_t * ip6,
+ ip4_header_t * ip4, void *ctx);
/* *INDENT-OFF* */
static u8 icmp6_to_icmp_updater_pointer_table[] =
@@ -47,6 +51,8 @@ static u8 icmp6_to_icmp_updater_pointer_table[] =
/**
* @brief Parse some useful information from IPv6 header.
*
+ * @param vm vlib main
+ * @param b vlib buffer
* @param ip6 IPv6 header.
* @param buff_len Buffer length.
* @param l4_protocol L4 protocol number.
@@ -56,21 +62,37 @@ static u8 icmp6_to_icmp_updater_pointer_table[] =
* @returns 0 on success, non-zero value otherwise.
*/
static_always_inline int
-ip6_parse (const ip6_header_t * ip6, u32 buff_len,
- u8 * l4_protocol, u16 * l4_offset, u16 * frag_hdr_offset)
+ip6_parse (vlib_main_t * vm, vlib_buffer_t * b, const ip6_header_t * ip6,
+ u32 buff_len, u8 * l4_protocol, u16 * l4_offset,
+ u16 * frag_hdr_offset)
{
- if (ip6->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
+ ip6_ext_header_t *last_hdr, *frag_hdr;
+ u32 length;
+ if (ip6_walk_ext_hdr
+ (vm, b, ip6, IP_PROTOCOL_IPV6_FRAGMENTATION, &length, &frag_hdr,
+ &last_hdr))
{
- *l4_protocol = ((ip6_frag_hdr_t *) (ip6 + 1))->next_hdr;
- *frag_hdr_offset = sizeof (*ip6);
- *l4_offset = sizeof (*ip6) + sizeof (ip6_frag_hdr_t);
+ return -1;
+ }
+
+ if (length > 0)
+ {
+ if (frag_hdr)
+ {
+ *frag_hdr_offset = (u8 *) frag_hdr - (u8 *) ip6;
+ }
+ else
+ {
+ *frag_hdr_offset = 0;
+ }
+ *l4_protocol = last_hdr->next_hdr;
}
else
{
- *l4_protocol = ip6->protocol;
*frag_hdr_offset = 0;
- *l4_offset = sizeof (*ip6);
+ *l4_protocol = ip6->protocol;
}
+ *l4_offset = sizeof (*ip6) + length;
return (buff_len < (*l4_offset + 4)) ||
(clib_net_to_host_u16 (ip6->payload_length) <
@@ -78,23 +100,32 @@ ip6_parse (const ip6_header_t * ip6, u32 buff_len,
}
/**
- * @brief Get TCP/UDP port number or ICMP id from IPv6 packet.
+ * @brief Get L4 information like port number or ICMP id from IPv6 packet.
*
* @param ip6 IPv6 header.
- * @param sender 1 get sender port, 0 get receiver port.
* @param buffer_len Buffer length.
+ * @param ip_protocol L4 protocol
+ * @param src_port L4 src port or icmp id
+ * @param dst_post L4 dst port or icmp id
+ * @param icmp_type_or_tcp_flags ICMP type or TCP flags, if applicable
+ * @param tcp_ack_number TCP ack number, if applicable
+ * @param tcp_seq_number TCP seq number, if applicable
*
- * @returns Port number on success, 0 otherwise.
+ * @returns 1 on success, 0 otherwise.
*/
always_inline u16
-ip6_get_port (ip6_header_t * ip6, u8 sender, u16 buffer_len)
+ip6_get_port (vlib_main_t * vm, vlib_buffer_t * b, ip6_header_t * ip6,
+ u16 buffer_len, u8 * ip_protocol, u16 * src_port,
+ u16 * dst_port, u8 * icmp_type_or_tcp_flags,
+ u32 * tcp_ack_number, u32 * tcp_seq_number)
{
u8 l4_protocol;
u16 l4_offset;
u16 frag_offset;
u8 *l4;
- if (ip6_parse (ip6, buffer_len, &l4_protocol, &l4_offset, &frag_offset))
+ if (ip6_parse
+ (vm, b, ip6, buffer_len, &l4_protocol, &l4_offset, &frag_offset))
return 0;
if (frag_offset &&
@@ -102,26 +133,45 @@ ip6_get_port (ip6_header_t * ip6, u8 sender, u16 buffer_len)
u8_ptr_add (ip6, frag_offset))))
return 0; //Can't deal with non-first fragment for now
+ if (ip_protocol)
+ {
+ *ip_protocol = l4_protocol;
+ }
l4 = u8_ptr_add (ip6, l4_offset);
if (l4_protocol == IP_PROTOCOL_TCP || l4_protocol == IP_PROTOCOL_UDP)
{
- return (sender) ? ((udp_header_t *) (l4))->src_port : ((udp_header_t
- *)
- (l4))->dst_port;
+ if (src_port)
+ *src_port = ((udp_header_t *) (l4))->src_port;
+ if (dst_port)
+ *dst_port = ((udp_header_t *) (l4))->dst_port;
+ if (icmp_type_or_tcp_flags && l4_protocol == IP_PROTOCOL_TCP)
+ *icmp_type_or_tcp_flags = ((tcp_header_t *) (l4))->flags;
+ if (tcp_ack_number && l4_protocol == IP_PROTOCOL_TCP)
+ *tcp_ack_number = ((tcp_header_t *) (l4))->ack_number;
+ if (tcp_seq_number && l4_protocol == IP_PROTOCOL_TCP)
+ *tcp_seq_number = ((tcp_header_t *) (l4))->seq_number;
}
else if (l4_protocol == IP_PROTOCOL_ICMP6)
{
icmp46_header_t *icmp = (icmp46_header_t *) (l4);
+ if (icmp_type_or_tcp_flags)
+ *icmp_type_or_tcp_flags = ((icmp46_header_t *) (l4))->type;
if (icmp->type == ICMP6_echo_request)
{
- return (sender) ? ((u16 *) (icmp))[2] : -1;
+ if (src_port)
+ *src_port = ((u16 *) (icmp))[2];
+ if (dst_port)
+ *dst_port = ((u16 *) (icmp))[2];
}
else if (icmp->type == ICMP6_echo_reply)
{
- return (sender) ? -1 : ((u16 *) (icmp))[2];
+ if (src_port)
+ *src_port = ((u16 *) (icmp))[2];
+ if (dst_port)
+ *dst_port = ((u16 *) (icmp))[2];
}
}
- return 0;
+ return 1;
}
/**
@@ -223,14 +273,14 @@ icmp6_to_icmp_header (icmp46_header_t * icmp, ip6_header_t ** inner_ip6)
/**
* @brief Translate TOS value from IPv6 to IPv4.
*
- * @param ip6 IPv6 header.
+ * @param ip_version_traffic_class_and_flow_label in network byte order
*
* @returns IPv4 TOS value.
*/
static_always_inline u8
-ip6_translate_tos (const ip6_header_t * ip6)
+ip6_translate_tos (u32 ip_version_traffic_class_and_flow_label)
{
- return (clib_net_to_host_u32 (ip6->ip_version_traffic_class_and_flow_label)
+ return (clib_net_to_host_u32 (ip_version_traffic_class_and_flow_label)
& 0x0ff00000) >> 20;
}
@@ -246,8 +296,9 @@ ip6_translate_tos (const ip6_header_t * ip6)
* @returns 0 on success, non-zero value otherwise.
*/
always_inline int
-icmp6_to_icmp (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx,
- ip6_to_ip4_set_fn_t inner_fn, void *inner_ctx)
+icmp6_to_icmp (vlib_main_t * vm, vlib_buffer_t * p,
+ ip6_to_ip4_icmp_set_fn_t fn, void *ctx,
+ ip6_to_ip4_icmp_set_fn_t inner_fn, void *inner_ctx)
{
ip6_header_t *ip6, *inner_ip6;
ip4_header_t *ip4, *inner_ip4;
@@ -285,7 +336,7 @@ icmp6_to_icmp (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx,
// TO
// [ IPv4][IC][ IPv4][L4 header ...
- if (ip6_parse (inner_ip6, ip6_pay_len - 8,
+ if (ip6_parse (vm, p, inner_ip6, ip6_pay_len - 8,
&inner_protocol, &inner_l4_offset, &inner_frag_offset))
return -1;
@@ -336,7 +387,9 @@ icmp6_to_icmp (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx,
inner_ip4->ip_version_and_header_length =
IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- inner_ip4->tos = ip6_translate_tos (inner_ip6);
+ inner_ip4->tos =
+ ip6_translate_tos
+ (inner_ip6->ip_version_traffic_class_and_flow_label);
inner_ip4->length =
u16_net_add (inner_ip6->payload_length,
sizeof (*ip4) + sizeof (*ip6) - inner_l4_offset);
@@ -389,7 +442,7 @@ icmp6_to_icmp (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx,
ip4->ip_version_and_header_length =
IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip6);
+ ip4->tos = ip6_translate_tos (ip6->ip_version_traffic_class_and_flow_label);
ip4->fragment_id = 0;
ip4->flags_and_fragment_offset = 0;
ip4->ttl = ip6->hop_limit;
@@ -412,220 +465,6 @@ icmp6_to_icmp (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx,
return 0;
}
-/**
- * @brief Translate IPv6 fragmented packet to IPv4.
- *
- * @param p Buffer to translate.
- * @param fn The function to translate header.
- * @param ctx A context passed in the header translate function.
- *
- * @returns 0 on success, non-zero value otherwise.
- */
-always_inline int
-ip6_to_ip4_fragmented (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx)
-{
- ip6_header_t *ip6;
- ip6_frag_hdr_t *frag;
- ip4_header_t *ip4;
- u16 frag_id;
- u8 frag_more;
- u16 frag_offset;
- u8 l4_protocol;
- u16 l4_offset;
- int rv;
-
- ip6 = vlib_buffer_get_current (p);
-
- if (ip6_parse
- (ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset))
- return -1;
-
- frag = (ip6_frag_hdr_t *) u8_ptr_add (ip6, frag_offset);
- ip4 = (ip4_header_t *) u8_ptr_add (ip6, l4_offset - sizeof (*ip4));
- vlib_buffer_advance (p, l4_offset - sizeof (*ip4));
-
- frag_id = frag_id_6to4 (frag->identification);
- frag_more = ip6_frag_hdr_more (frag);
- frag_offset = ip6_frag_hdr_offset (frag);
-
- if ((rv = fn (ip6, ip4, ctx)) != 0)
- return rv;
-
- ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip6);
- ip4->length = u16_net_add (ip6->payload_length,
- sizeof (*ip4) - l4_offset + sizeof (*ip6));
- ip4->fragment_id = frag_id;
- ip4->flags_and_fragment_offset =
- clib_host_to_net_u16 (frag_offset |
- (frag_more ? IP4_HEADER_FLAG_MORE_FRAGMENTS : 0));
- ip4->ttl = ip6->hop_limit;
- ip4->protocol =
- (l4_protocol == IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : l4_protocol;
- ip4->checksum = ip4_header_checksum (ip4);
-
- return 0;
-}
-
-/**
- * @brief Translate IPv6 UDP/TCP packet to IPv4.
- *
- * @param p Buffer to translate.
- * @param fn The function to translate header.
- * @param ctx A context passed in the header translate function.
- *
- * @returns 0 on success, non-zero value otherwise.
- */
-always_inline int
-ip6_to_ip4_tcp_udp (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx,
- u8 udp_checksum)
-{
- ip6_header_t *ip6;
- u16 *checksum;
- ip_csum_t csum = 0;
- ip4_header_t *ip4;
- u16 fragment_id;
- u16 flags;
- u16 frag_offset;
- u8 l4_protocol;
- u16 l4_offset;
- int rv;
- ip6_address_t old_src, old_dst;
-
- ip6 = vlib_buffer_get_current (p);
-
- if (ip6_parse
- (ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset))
- return -1;
-
- if (l4_protocol == IP_PROTOCOL_TCP)
- {
- tcp_header_t *tcp = ip6_next_header (ip6);
- checksum = &tcp->checksum;
- }
- else
- {
- udp_header_t *udp = ip6_next_header (ip6);
- checksum = &udp->checksum;
- }
-
- old_src.as_u64[0] = ip6->src_address.as_u64[0];
- old_src.as_u64[1] = ip6->src_address.as_u64[1];
- old_dst.as_u64[0] = ip6->dst_address.as_u64[0];
- old_dst.as_u64[1] = ip6->dst_address.as_u64[1];
-
- ip4 = (ip4_header_t *) u8_ptr_add (ip6, l4_offset - sizeof (*ip4));
-
- vlib_buffer_advance (p, l4_offset - sizeof (*ip4));
-
- if (PREDICT_FALSE (frag_offset))
- {
- //Only the first fragment
- ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip6, frag_offset);
- fragment_id = frag_id_6to4 (hdr->identification);
- flags = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
- }
- else
- {
- fragment_id = 0;
- flags = 0;
- }
-
- if ((rv = fn (ip6, ip4, ctx)) != 0)
- return rv;
-
- ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip6);
- ip4->length = u16_net_add (ip6->payload_length,
- sizeof (*ip4) + sizeof (*ip6) - l4_offset);
- ip4->fragment_id = fragment_id;
- ip4->flags_and_fragment_offset = flags;
- ip4->ttl = ip6->hop_limit;
- ip4->protocol = l4_protocol;
- ip4->checksum = ip4_header_checksum (ip4);
-
- //UDP checksum is optional over IPv4
- if (!udp_checksum && l4_protocol == IP_PROTOCOL_UDP)
- {
- *checksum = 0;
- }
- else
- {
- csum = ip_csum_sub_even (*checksum, old_src.as_u64[0]);
- csum = ip_csum_sub_even (csum, old_src.as_u64[1]);
- csum = ip_csum_sub_even (csum, old_dst.as_u64[0]);
- csum = ip_csum_sub_even (csum, old_dst.as_u64[1]);
- csum = ip_csum_add_even (csum, ip4->dst_address.as_u32);
- csum = ip_csum_add_even (csum, ip4->src_address.as_u32);
- *checksum = ip_csum_fold (csum);
- }
-
- return 0;
-}
-
-/**
- * @brief Translate IPv6 packet to IPv4 (IP header only).
- *
- * @param p Buffer to translate.
- * @param fn The function to translate header.
- * @param ctx A context passed in the header translate function.
- *
- * @returns 0 on success, non-zero value otherwise.
- */
-always_inline int
-ip6_to_ip4 (vlib_buffer_t * p, ip6_to_ip4_set_fn_t fn, void *ctx)
-{
- ip6_header_t *ip6;
- ip4_header_t *ip4;
- u16 fragment_id;
- u16 flags;
- u16 frag_offset;
- u8 l4_protocol;
- u16 l4_offset;
- int rv;
-
- ip6 = vlib_buffer_get_current (p);
-
- if (ip6_parse
- (ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset))
- return -1;
-
- ip4 = (ip4_header_t *) u8_ptr_add (ip6, l4_offset - sizeof (*ip4));
-
- vlib_buffer_advance (p, l4_offset - sizeof (*ip4));
-
- if (PREDICT_FALSE (frag_offset))
- {
- //Only the first fragment
- ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip6, frag_offset);
- fragment_id = frag_id_6to4 (hdr->identification);
- flags = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
- }
- else
- {
- fragment_id = 0;
- flags = 0;
- }
-
- if ((rv = fn (ip6, ip4, ctx)) != 0)
- return rv;
-
- ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip6);
- ip4->length = u16_net_add (ip6->payload_length,
- sizeof (*ip4) + sizeof (*ip6) - l4_offset);
- ip4->fragment_id = fragment_id;
- ip4->flags_and_fragment_offset = flags;
- ip4->ttl = ip6->hop_limit;
- ip4->protocol = l4_protocol;
- ip4->checksum = ip4_header_checksum (ip4);
-
- return 0;
-}
-
#endif /* __included_ip6_to_ip4_h__ */
/*
diff --git a/src/vnet/ip/reass/ip4_sv_reass.c b/src/vnet/ip/reass/ip4_sv_reass.c
index d7130629219..b94e9b28cea 100644
--- a/src/vnet/ip/reass/ip4_sv_reass.c
+++ b/src/vnet/ip/reass/ip4_sv_reass.c
@@ -98,6 +98,9 @@ typedef struct
bool is_complete;
// ip protocol
u8 ip_proto;
+ u8 icmp_type_or_tcp_flags;
+ u32 tcp_ack_number;
+ u32 tcp_seq_number;
// l4 src port
u16 l4_src_port;
// l4 dst port
@@ -151,6 +154,9 @@ typedef struct
// reference count for enabling/disabling feature - per interface
u32 *feature_use_refcount_per_intf;
+ // reference count for enabling/disabling feature - per interface
+ u32 *output_feature_use_refcount_per_intf;
+
} ip4_sv_reass_main_t;
extern ip4_sv_reass_main_t ip4_sv_reass_main;
@@ -172,6 +178,7 @@ typedef enum
REASS_FRAGMENT_CACHE,
REASS_FINISH,
REASS_FRAGMENT_FORWARD,
+ REASS_PASSTHROUGH,
} ip4_sv_reass_trace_operation_e;
typedef struct
@@ -193,7 +200,10 @@ format_ip4_sv_reass_trace (u8 * s, va_list * args)
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
ip4_sv_reass_trace_t *t = va_arg (*args, ip4_sv_reass_trace_t *);
- s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
+ if (REASS_PASSTHROUGH != t->action)
+ {
+ s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
+ }
switch (t->action)
{
case REASS_FRAGMENT_CACHE:
@@ -211,6 +221,9 @@ format_ip4_sv_reass_trace (u8 * s, va_list * args)
t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
clib_net_to_host_u16 (t->l4_dst_port));
break;
+ case REASS_PASSTHROUGH:
+ s = format (s, "[not-fragmented]");
+ break;
}
return s;
}
@@ -223,13 +236,16 @@ ip4_sv_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
{
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
ip4_sv_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
- t->reass_id = reass->id;
+ if (reass)
+ {
+ t->reass_id = reass->id;
+ t->op_id = reass->trace_op_counter;
+ ++reass->trace_op_counter;
+ }
t->action = action;
- t->op_id = reass->trace_op_counter;
t->ip_proto = ip_proto;
t->l4_src_port = l4_src_port;
t->l4_dst_port = l4_dst_port;
- ++reass->trace_op_counter;
#if 0
static u8 *s = NULL;
s = format (s, "%U", format_ip4_sv_reass_trace, NULL, NULL, t);
@@ -358,19 +374,29 @@ ip4_sv_reass_find_or_create (vlib_main_t * vm, ip4_sv_reass_main_t * rm,
always_inline ip4_sv_reass_rc_t
ip4_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
ip4_sv_reass_main_t * rm, ip4_sv_reass_per_thread_t * rt,
- ip4_sv_reass_t * reass, u32 bi0)
+ ip4_header_t * ip0, ip4_sv_reass_t * reass, u32 bi0)
{
- vlib_buffer_t *fb = vlib_get_buffer (vm, bi0);
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
ip4_sv_reass_rc_t rc = IP4_SV_REASS_RC_OK;
- ip4_header_t *fip = vlib_buffer_get_current (fb);
- const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
+ const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
if (0 == fragment_first)
{
- reass->ip_proto = fip->protocol;
- reass->l4_src_port = ip4_get_port (fip, 1);
- reass->l4_dst_port = ip4_get_port (fip, 0);
+ reass->ip_proto = ip0->protocol;
+ reass->l4_src_port = ip4_get_port (ip0, 1);
+ reass->l4_dst_port = ip4_get_port (ip0, 0);
if (!reass->l4_src_port || !reass->l4_dst_port)
return IP4_SV_REASS_RC_UNSUPP_IP_PROTO;
+ if (IP_PROTOCOL_TCP == reass->ip_proto)
+ {
+ reass->icmp_type_or_tcp_flags = ((tcp_header_t *) (ip0 + 1))->flags;
+ reass->tcp_ack_number = ((tcp_header_t *) (ip0 + 1))->ack_number;
+ reass->tcp_seq_number = ((tcp_header_t *) (ip0 + 1))->seq_number;
+ }
+ else if (IP_PROTOCOL_ICMP == reass->ip_proto)
+ {
+ reass->icmp_type_or_tcp_flags =
+ ((icmp46_header_t *) (ip0 + 1))->type;
+ }
reass->is_complete = true;
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
@@ -383,7 +409,7 @@ ip4_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
vec_add1 (reass->cached_buffers, bi0);
if (!reass->is_complete)
{
- if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
ip4_sv_reass_add_trace (vm, node, rm, reass, bi0,
REASS_FRAGMENT_CACHE, ~0, ~0, ~0);
@@ -398,7 +424,8 @@ ip4_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
always_inline uword
ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame, bool is_feature, bool is_custom)
+ vlib_frame_t * frame, bool is_feature,
+ bool is_output_feature, bool is_custom)
{
u32 *from = vlib_frame_vector_args (frame);
u32 n_left_from, n_left_to_next, *to_next, next_index;
@@ -423,14 +450,52 @@ ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
bi0 = from[0];
b0 = vlib_get_buffer (vm, bi0);
- ip4_header_t *ip0 = vlib_buffer_get_current (b0);
+ ip4_header_t *ip0 =
+ (ip4_header_t *) u8_ptr_add (vlib_buffer_get_current (b0),
+ is_output_feature *
+ vnet_buffer (b0)->
+ ip.save_rewrite_length);
if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
{
// this is a regular packet - no fragmentation
+ if (is_custom)
+ {
+ next0 = vnet_buffer (b0)->ip.reass.next_index;
+ }
+ else
+ {
+ next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
+ }
+ vnet_buffer (b0)->ip.reass.save_rewrite_length =
+ vnet_buffer (b0)->ip.save_rewrite_length;
+ vnet_buffer (b0)->ip.reass.is_non_first_fragment = 0;
vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
+ if (IP_PROTOCOL_TCP == ip0->protocol)
+ {
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
+ ((tcp_header_t *) (ip0 + 1))->flags;
+ vnet_buffer (b0)->ip.reass.tcp_ack_number =
+ ((tcp_header_t *) (ip0 + 1))->ack_number;
+ vnet_buffer (b0)->ip.reass.tcp_seq_number =
+ ((tcp_header_t *) (ip0 + 1))->seq_number;
+ }
+ else if (IP_PROTOCOL_ICMP == ip0->protocol)
+ {
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
+ ((icmp46_header_t *) (ip0 + 1))->type;
+ }
vnet_buffer (b0)->ip.reass.l4_src_port = ip4_get_port (ip0, 1);
vnet_buffer (b0)->ip.reass.l4_dst_port = ip4_get_port (ip0, 0);
- next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip4_sv_reass_add_trace (vm, node, rm, NULL, bi0,
+ REASS_PASSTHROUGH,
+ vnet_buffer (b0)->ip.reass.ip_proto,
+ vnet_buffer (b0)->ip.
+ reass.l4_src_port,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port);
+ }
goto packet_enqueue;
}
const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
@@ -474,10 +539,27 @@ ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
if (reass->is_complete)
{
+ if (is_custom)
+ {
+ next0 = vnet_buffer (b0)->ip.reass.next_index;
+ }
+ else
+ {
+ next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
+ }
+ vnet_buffer (b0)->ip.reass.save_rewrite_length =
+ vnet_buffer (b0)->ip.save_rewrite_length;
+ vnet_buffer (b0)->ip.reass.is_non_first_fragment =
+ ! !fragment_first;
vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
+ reass->icmp_type_or_tcp_flags;
+ vnet_buffer (b0)->ip.reass.tcp_ack_number =
+ reass->tcp_ack_number;
+ vnet_buffer (b0)->ip.reass.tcp_seq_number =
+ reass->tcp_seq_number;
vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
- next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
error0 = IP4_ERROR_NONE;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
@@ -491,7 +573,7 @@ ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
}
ip4_sv_reass_rc_t rc =
- ip4_sv_reass_update (vm, node, rm, rt, reass, bi0);
+ ip4_sv_reass_update (vm, node, rm, rt, ip0, reass, bi0);
switch (rc)
{
case IP4_SV_REASS_RC_OK:
@@ -538,7 +620,18 @@ ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
to_next[0] = bi0;
to_next += 1;
n_left_to_next -= 1;
+ ASSERT (vnet_buffer (b0)->ip.save_rewrite_length < (2 << 14));
+ vnet_buffer (b0)->ip.reass.save_rewrite_length =
+ vnet_buffer (b0)->ip.save_rewrite_length;
+ vnet_buffer (b0)->ip.reass.is_non_first_fragment =
+ ! !ip4_get_fragment_offset (vlib_buffer_get_current (b0));
vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
+ reass->icmp_type_or_tcp_flags;
+ vnet_buffer (b0)->ip.reass.tcp_ack_number =
+ reass->tcp_ack_number;
+ vnet_buffer (b0)->ip.reass.tcp_seq_number =
+ reass->tcp_seq_number;
vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
@@ -568,10 +661,6 @@ ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
b0 = vlib_get_buffer (vm, bi0);
vnet_feature_next (&next0, b0);
}
- if (is_custom)
- {
- next0 = vnet_buffer (b0)->ip.reass.next_index;
- }
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
@@ -599,6 +688,7 @@ VLIB_NODE_FN (ip4_sv_reass_node) (vlib_main_t * vm,
vlib_frame_t * frame)
{
return ip4_sv_reass_inline (vm, node, frame, false /* is_feature */ ,
+ false /* is_output_feature */ ,
false /* is_custom */ );
}
@@ -625,6 +715,7 @@ VLIB_NODE_FN (ip4_sv_reass_node_feature) (vlib_main_t * vm,
vlib_frame_t * frame)
{
return ip4_sv_reass_inline (vm, node, frame, true /* is_feature */ ,
+ false /* is_output_feature */ ,
false /* is_custom */ );
}
@@ -654,6 +745,42 @@ VNET_FEATURE_INIT (ip4_sv_reass_feature) = {
};
/* *INDENT-ON* */
+VLIB_NODE_FN (ip4_sv_reass_node_output_feature) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip4_sv_reass_inline (vm, node, frame, true /* is_feature */ ,
+ true /* is_output_feature */ ,
+ false /* is_custom */ );
+}
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_node_output_feature) = {
+ .name = "ip4-sv-reassembly-output-feature",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
+ .error_strings = ip4_sv_reass_error_strings,
+ .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
+ [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
+ [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reass-feature-hoff",
+ },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VNET_FEATURE_INIT (ip4_sv_reass_output_feature) = {
+ .arc_name = "ip4-output",
+ .node_name = "ip4-sv-reassembly-output-feature",
+ .runs_before = 0,
+ .runs_after = 0,
+};
+/* *INDENT-ON* */
+
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip4_sv_reass_custom_node) = {
.name = "ip4-sv-reassembly-custom-next",
@@ -677,6 +804,7 @@ VLIB_NODE_FN (ip4_sv_reass_custom_node) (vlib_main_t * vm,
vlib_frame_t * frame)
{
return ip4_sv_reass_inline (vm, node, frame, false /* is_feature */ ,
+ false /* is_output_feature */ ,
true /* is_custom */ );
}
@@ -824,6 +952,7 @@ ip4_sv_reass_init_function (vlib_main_t * vm)
vlib_frame_queue_main_init (ip4_sv_reass_node_feature.index, 0);
rm->feature_use_refcount_per_intf = NULL;
+ rm->output_feature_use_refcount_per_intf = NULL;
return error;
}
@@ -1010,9 +1139,8 @@ VLIB_CLI_COMMAND (show_ip4_sv_reass_cmd, static) = {
vnet_api_error_t
ip4_sv_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
{
- return vnet_feature_enable_disable ("ip4-unicast",
- "ip4-sv-reassembly-feature",
- sw_if_index, enable_disable, 0, 0);
+ return ip4_sv_reass_enable_disable_with_refcnt (sw_if_index,
+ enable_disable);
}
#endif /* CLIB_MARCH_VARIANT */
@@ -1177,7 +1305,8 @@ ip4_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
}
else
{
- --rm->feature_use_refcount_per_intf[sw_if_index];
+ if (rm->feature_use_refcount_per_intf[sw_if_index])
+ --rm->feature_use_refcount_per_intf[sw_if_index];
if (!rm->feature_use_refcount_per_intf[sw_if_index])
return vnet_feature_enable_disable ("ip4-unicast",
"ip4-sv-reassembly-feature",
@@ -1192,6 +1321,35 @@ ip4_sv_reass_custom_register_next_node (uword node_index)
return vlib_node_add_next (vlib_get_main (), ip4_sv_reass_custom_node.index,
node_index);
}
+
+int
+ip4_sv_reass_output_enable_disable_with_refcnt (u32 sw_if_index,
+ int is_enable)
+{
+ ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
+ vec_validate (rm->output_feature_use_refcount_per_intf, sw_if_index);
+ if (is_enable)
+ {
+ if (!rm->output_feature_use_refcount_per_intf[sw_if_index])
+ {
+ ++rm->output_feature_use_refcount_per_intf[sw_if_index];
+ return vnet_feature_enable_disable ("ip4-output",
+ "ip4-sv-reassembly-output-feature",
+ sw_if_index, 1, 0, 0);
+ }
+ ++rm->output_feature_use_refcount_per_intf[sw_if_index];
+ }
+ else
+ {
+ if (rm->output_feature_use_refcount_per_intf[sw_if_index])
+ --rm->output_feature_use_refcount_per_intf[sw_if_index];
+ if (!rm->output_feature_use_refcount_per_intf[sw_if_index])
+ return vnet_feature_enable_disable ("ip4-output",
+ "ip4-sv-reassembly-output-feature",
+ sw_if_index, 0, 0, 0);
+ }
+ return 0;
+}
#endif
/*
diff --git a/src/vnet/ip/reass/ip4_sv_reass.h b/src/vnet/ip/reass/ip4_sv_reass.h
index cf9f36502a0..e926dbeebcc 100644
--- a/src/vnet/ip/reass/ip4_sv_reass.h
+++ b/src/vnet/ip/reass/ip4_sv_reass.h
@@ -45,6 +45,8 @@ vnet_api_error_t ip4_sv_reass_enable_disable (u32 sw_if_index,
int ip4_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable);
+int ip4_sv_reass_output_enable_disable_with_refcnt (u32 sw_if_index,
+ int is_enable);
uword ip4_sv_reass_custom_register_next_node (uword node_index);
diff --git a/src/vnet/ip/reass/ip6_sv_reass.c b/src/vnet/ip/reass/ip6_sv_reass.c
index 0837f0606ec..442617703a1 100644
--- a/src/vnet/ip/reass/ip6_sv_reass.c
+++ b/src/vnet/ip/reass/ip6_sv_reass.c
@@ -96,6 +96,9 @@ typedef struct
bool is_complete;
// ip protocol
u8 ip_proto;
+ u8 icmp_type_or_tcp_flags;
+ u32 tcp_ack_number;
+ u32 tcp_seq_number;
// l4 src port
u16 l4_src_port;
// l4 dst port
@@ -170,6 +173,7 @@ typedef enum
REASS_FRAGMENT_CACHE,
REASS_FINISH,
REASS_FRAGMENT_FORWARD,
+ REASS_PASSTHROUGH,
} ip6_sv_reass_trace_operation_e;
typedef struct
@@ -188,7 +192,10 @@ format_ip6_sv_reass_trace (u8 * s, va_list * args)
CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
ip6_sv_reass_trace_t *t = va_arg (*args, ip6_sv_reass_trace_t *);
- s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
+ if (REASS_PASSTHROUGH != t->action)
+ {
+ s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
+ }
switch (t->action)
{
case REASS_FRAGMENT_CACHE:
@@ -206,6 +213,9 @@ format_ip6_sv_reass_trace (u8 * s, va_list * args)
t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
clib_net_to_host_u16 (t->l4_dst_port));
break;
+ case REASS_PASSTHROUGH:
+ s = format (s, "[not-fragmented]");
+ break;
}
return s;
}
@@ -219,13 +229,16 @@ ip6_sv_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
{
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
ip6_sv_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
- t->reass_id = reass->id;
+ if (reass)
+ {
+ t->reass_id = reass->id;
+ t->op_id = reass->trace_op_counter;
+ ++reass->trace_op_counter;
+ }
t->action = action;
- t->op_id = reass->trace_op_counter;
t->ip_proto = ip_proto;
t->l4_src_port = l4_src_port;
t->l4_dst_port = l4_dst_port;
- ++reass->trace_op_counter;
#if 0
static u8 *s = NULL;
s = format (s, "%U", format_ip6_sv_reass_trace, NULL, NULL, t);
@@ -391,18 +404,13 @@ ip6_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
fvnb->ip.reass.next_range_bi = ~0;
if (0 == fragment_first)
{
- ip6_ext_header_t *ext_hdr = (void *) frag_hdr;
- while (ip6_ext_hdr (ext_hdr->next_hdr)
- && vlib_object_within_buffer_data (vm, fb, ext_hdr,
- ext_hdr->n_data_u64s * 8))
- {
- ext_hdr = ip6_ext_next_header (ext_hdr);
- }
- reass->ip_proto = ext_hdr->next_hdr;
- reass->l4_src_port = ip6_get_port (fip, 1, fb->current_length);
- reass->l4_dst_port = ip6_get_port (fip, 0, fb->current_length);
- if (!reass->l4_src_port || !reass->l4_dst_port)
+ if (!ip6_get_port
+ (vm, fb, fip, fb->current_length, &reass->ip_proto,
+ &reass->l4_src_port, &reass->l4_dst_port,
+ &reass->icmp_type_or_tcp_flags, &reass->tcp_ack_number,
+ &reass->tcp_seq_number))
return IP6_SV_REASS_RC_UNSUPP_IP_PROTO;
+
reass->is_complete = true;
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
@@ -538,12 +546,34 @@ ip6_sv_reassembly_inline (vlib_main_t * vm,
if (!frag_hdr)
{
// this is a regular packet - no fragmentation
- vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
- vnet_buffer (b0)->ip.reass.l4_src_port =
- ip6_get_port (ip0, 1, b0->current_length);
- vnet_buffer (b0)->ip.reass.l4_dst_port =
- ip6_get_port (ip0, 0, b0->current_length);
+ if (!ip6_get_port
+ (vm, b0, ip0, b0->current_length,
+ &(vnet_buffer (b0)->ip.reass.ip_proto),
+ &(vnet_buffer (b0)->ip.reass.l4_src_port),
+ &(vnet_buffer (b0)->ip.reass.l4_dst_port),
+ &(vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags),
+ &(vnet_buffer (b0)->ip.reass.tcp_ack_number),
+ &(vnet_buffer (b0)->ip.reass.tcp_seq_number)))
+ {
+ error0 = IP6_ERROR_REASS_UNSUPP_IP_PROTO;
+ next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
+ goto packet_enqueue;
+ }
+ ASSERT (vnet_buffer (b0)->ip.save_rewrite_length < (2 << 14));
+ vnet_buffer (b0)->ip.reass.save_rewrite_length =
+ vnet_buffer (b0)->ip.save_rewrite_length;
+ vnet_buffer (b0)->ip.reass.is_non_first_fragment = 0;
next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_sv_reass_add_trace (vm, node, rm, NULL, bi0,
+ REASS_PASSTHROUGH,
+ vnet_buffer (b0)->ip.reass.ip_proto,
+ vnet_buffer (b0)->ip.
+ reass.l4_src_port,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port);
+ }
goto packet_enqueue;
}
vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
@@ -601,7 +631,18 @@ ip6_sv_reassembly_inline (vlib_main_t * vm,
if (reass->is_complete)
{
+ ASSERT (vnet_buffer (b0)->ip.save_rewrite_length < (2 << 14));
+ vnet_buffer (b0)->ip.reass.save_rewrite_length =
+ vnet_buffer (b0)->ip.save_rewrite_length;
+ vnet_buffer (b0)->ip.reass.is_non_first_fragment =
+ ! !ip6_frag_hdr_offset (frag_hdr);
vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
+ reass->icmp_type_or_tcp_flags;
+ vnet_buffer (b0)->ip.reass.tcp_ack_number =
+ reass->tcp_ack_number;
+ vnet_buffer (b0)->ip.reass.tcp_seq_number =
+ reass->tcp_seq_number;
vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
@@ -668,7 +709,21 @@ ip6_sv_reassembly_inline (vlib_main_t * vm,
{
vnet_feature_next (&next0, b0);
}
+ frag_hdr =
+ vlib_buffer_get_current (b0) +
+ vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset;
+ ASSERT (vnet_buffer (b0)->ip.save_rewrite_length < (2 << 14));
+ vnet_buffer (b0)->ip.reass.save_rewrite_length =
+ vnet_buffer (b0)->ip.save_rewrite_length;
+ vnet_buffer (b0)->ip.reass.is_non_first_fragment =
+ ! !ip6_frag_hdr_offset (frag_hdr);
vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
+ reass->icmp_type_or_tcp_flags;
+ vnet_buffer (b0)->ip.reass.tcp_ack_number =
+ reass->tcp_ack_number;
+ vnet_buffer (b0)->ip.reass.tcp_seq_number =
+ reass->tcp_seq_number;
vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
@@ -1124,9 +1179,8 @@ VLIB_CLI_COMMAND (show_ip6_sv_reassembly_cmd, static) = {
vnet_api_error_t
ip6_sv_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
{
- return vnet_feature_enable_disable ("ip6-unicast",
- "ip6-sv-reassembly-feature",
- sw_if_index, enable_disable, 0, 0);
+ return ip6_sv_reass_enable_disable_with_refcnt (sw_if_index,
+ enable_disable);
}
#endif /* CLIB_MARCH_VARIANT */