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* [dpdk-stable] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option
@ 2020-05-01 16:11 Pu Xu
  2020-05-01 20:43 ` [dpdk-stable] [dpdk-dev] " Ananyev, Konstantin
  0 siblings, 1 reply; 6+ messages in thread
From: Pu Xu @ 2020-05-01 16:11 UTC (permalink / raw)
  To: cuanduo; +Cc: dev, Pu Xu, anatoly.burakov, stable

When fragmenting ipv4 packet, the data offset should be calculated through
the ihl field in ip header rather than using sizeof(struct rte_ipv4_hdr).

Fixes: 4c38e5532a07 ("ip_frag: refactor IPv4 fragmentation into a proper library")
Cc: anatoly.burakov@intel.com
Cc: stable@dpdk.org
---
 lib/librte_ip_frag/rte_ipv4_fragmentation.c | 34 +++++++++++++--------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/lib/librte_ip_frag/rte_ipv4_fragmentation.c b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
index e9de335ae..2e7739d02 100644
--- a/lib/librte_ip_frag/rte_ipv4_fragmentation.c
+++ b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
@@ -23,10 +23,10 @@
 #define	IPV4_HDR_FO_ALIGN			(1 << RTE_IPV4_HDR_FO_SHIFT)
 
 static inline void __fill_ipv4hdr_frag(struct rte_ipv4_hdr *dst,
-		const struct rte_ipv4_hdr *src, uint16_t len, uint16_t fofs,
-		uint16_t dofs, uint32_t mf)
+		const struct rte_ipv4_hdr *src, uint16_t header_len,
+		uint16_t len, uint16_t fofs, uint16_t dofs, uint32_t mf)
 {
-	rte_memcpy(dst, src, sizeof(*dst));
+	rte_memcpy(dst, src, header_len);
 	fofs = (uint16_t)(fofs + (dofs >> RTE_IPV4_HDR_FO_SHIFT));
 	fofs = (uint16_t)(fofs | mf << RTE_IPV4_HDR_MF_SHIFT);
 	dst->fragment_offset = rte_cpu_to_be_16(fofs);
@@ -74,7 +74,7 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 	struct rte_ipv4_hdr *in_hdr;
 	uint32_t out_pkt_pos, in_seg_data_pos;
 	uint32_t more_in_segs;
-	uint16_t fragment_offset, flag_offset, frag_size;
+	uint16_t fragment_offset, flag_offset, frag_size, header_len;
 	uint16_t frag_bytes_remaining;
 
 	/*
@@ -86,14 +86,22 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 	    unlikely(mtu_size < RTE_ETHER_MIN_MTU))
 		return -EINVAL;
 
+	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
+	header_len = (in_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK) *
+	    RTE_IPV4_IHL_MULTIPLIER;
+
+	/* Check IP header length */
+	if (unlikely(pkt_in->data_len < header_len) ||
+	    unlikely(mtu_size < header_len))
+		return -EINVAL;
+
 	/*
 	 * Ensure the IP payload length of all fragments is aligned to a
 	 * multiple of 8 bytes as per RFC791 section 2.3.
 	 */
-	frag_size = RTE_ALIGN_FLOOR((mtu_size - sizeof(struct rte_ipv4_hdr)),
+	frag_size = RTE_ALIGN_FLOOR((mtu_size - header_len),
 				    IPV4_HDR_FO_ALIGN);
 
-	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
 	flag_offset = rte_cpu_to_be_16(in_hdr->fragment_offset);
 
 	/* If Don't Fragment flag is set */
@@ -102,11 +110,11 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 
 	/* Check that pkts_out is big enough to hold all fragments */
 	if (unlikely(frag_size * nb_pkts_out <
-	    (uint16_t)(pkt_in->pkt_len - sizeof(struct rte_ipv4_hdr))))
+	    (uint16_t)(pkt_in->pkt_len - header_len)))
 		return -EINVAL;
 
 	in_seg = pkt_in;
-	in_seg_data_pos = sizeof(struct rte_ipv4_hdr);
+	in_seg_data_pos = header_len;
 	out_pkt_pos = 0;
 	fragment_offset = 0;
 
@@ -124,8 +132,8 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 		}
 
 		/* Reserve space for the IP header that will be built later */
-		out_pkt->data_len = sizeof(struct rte_ipv4_hdr);
-		out_pkt->pkt_len = sizeof(struct rte_ipv4_hdr);
+		out_pkt->data_len = header_len;
+		out_pkt->pkt_len = header_len;
 		frag_bytes_remaining = frag_size;
 
 		out_seg_prev = out_pkt;
@@ -176,14 +184,14 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 
 		out_hdr = rte_pktmbuf_mtod(out_pkt, struct rte_ipv4_hdr *);
 
-		__fill_ipv4hdr_frag(out_hdr, in_hdr,
+		__fill_ipv4hdr_frag(out_hdr, in_hdr, header_len,
 		    (uint16_t)out_pkt->pkt_len,
 		    flag_offset, fragment_offset, more_in_segs);
 
 		fragment_offset = (uint16_t)(fragment_offset +
-		    out_pkt->pkt_len - sizeof(struct rte_ipv4_hdr));
+		    out_pkt->pkt_len - header_len);
 
-		out_pkt->l3_len = sizeof(struct rte_ipv4_hdr);
+		out_pkt->l3_len = header_len;
 
 		/* Write the fragment to the output list */
 		pkts_out[out_pkt_pos] = out_pkt;
-- 
2.17.0



^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option
  2020-05-01 16:11 [dpdk-stable] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option Pu Xu
@ 2020-05-01 20:43 ` " Ananyev, Konstantin
  2020-05-24 15:27   ` Thomas Monjalon
  0 siblings, 1 reply; 6+ messages in thread
From: Ananyev, Konstantin @ 2020-05-01 20:43 UTC (permalink / raw)
  To: Pu Xu, cuanduo; +Cc: dev, Burakov, Anatoly, stable


> 
> When fragmenting ipv4 packet, the data offset should be calculated through
> the ihl field in ip header rather than using sizeof(struct rte_ipv4_hdr).
> 
> Fixes: 4c38e5532a07 ("ip_frag: refactor IPv4 fragmentation into a proper library")
> Cc: anatoly.burakov@intel.com
> Cc: stable@dpdk.org
> ---

Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> 2.17.0
> 


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [dpdk-stable] [dpdk-dev] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option
  2020-05-01 20:43 ` [dpdk-stable] [dpdk-dev] " Ananyev, Konstantin
@ 2020-05-24 15:27   ` Thomas Monjalon
  0 siblings, 0 replies; 6+ messages in thread
From: Thomas Monjalon @ 2020-05-24 15:27 UTC (permalink / raw)
  To: Pu Xu; +Cc: cuanduo, dev, Burakov, Anatoly, stable, Ananyev, Konstantin

01/05/2020 22:43, Ananyev, Konstantin:
> 
> > 
> > When fragmenting ipv4 packet, the data offset should be calculated through
> > the ihl field in ip header rather than using sizeof(struct rte_ipv4_hdr).
> > 
> > Fixes: 4c38e5532a07 ("ip_frag: refactor IPv4 fragmentation into a proper library")
> > Cc: anatoly.burakov@intel.com
> > Cc: stable@dpdk.org
> > ---
> 
> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

The patch cannot be merged because it is missing a Signed-off-by line.

In general, please follow the contributions guideline here:
	http://core.dpdk.org/contribute/#send

Would be appreciated to number subsequent versions of the patches,
and use --in-reply-to to keep them threaded.



^ permalink raw reply	[flat|nested] 6+ messages in thread

* [dpdk-stable] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option
@ 2020-05-01 16:16 " Pu Xu
  0 siblings, 0 replies; 6+ messages in thread
From: Pu Xu @ 2020-05-01 16:16 UTC (permalink / raw)
  To: konstantin.ananyev; +Cc: dev, Pu Xu, anatoly.burakov, stable

When fragmenting ipv4 packet, the data offset should be calculated through
the ihl field in ip header rather than using sizeof(struct rte_ipv4_hdr).

Fixes: 4c38e5532a07 ("ip_frag: refactor IPv4 fragmentation into a proper library")
Cc: anatoly.burakov@intel.com
Cc: stable@dpdk.org

Signed-off-by: Pu Xu <583493798@qq.com>
---
 lib/librte_ip_frag/rte_ipv4_fragmentation.c | 34 +++++++++++++--------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/lib/librte_ip_frag/rte_ipv4_fragmentation.c b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
index e9de335ae..2e7739d02 100644
--- a/lib/librte_ip_frag/rte_ipv4_fragmentation.c
+++ b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
@@ -23,10 +23,10 @@
 #define	IPV4_HDR_FO_ALIGN			(1 << RTE_IPV4_HDR_FO_SHIFT)
 
 static inline void __fill_ipv4hdr_frag(struct rte_ipv4_hdr *dst,
-		const struct rte_ipv4_hdr *src, uint16_t len, uint16_t fofs,
-		uint16_t dofs, uint32_t mf)
+		const struct rte_ipv4_hdr *src, uint16_t header_len,
+		uint16_t len, uint16_t fofs, uint16_t dofs, uint32_t mf)
 {
-	rte_memcpy(dst, src, sizeof(*dst));
+	rte_memcpy(dst, src, header_len);
 	fofs = (uint16_t)(fofs + (dofs >> RTE_IPV4_HDR_FO_SHIFT));
 	fofs = (uint16_t)(fofs | mf << RTE_IPV4_HDR_MF_SHIFT);
 	dst->fragment_offset = rte_cpu_to_be_16(fofs);
@@ -74,7 +74,7 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 	struct rte_ipv4_hdr *in_hdr;
 	uint32_t out_pkt_pos, in_seg_data_pos;
 	uint32_t more_in_segs;
-	uint16_t fragment_offset, flag_offset, frag_size;
+	uint16_t fragment_offset, flag_offset, frag_size, header_len;
 	uint16_t frag_bytes_remaining;
 
 	/*
@@ -86,14 +86,22 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 	    unlikely(mtu_size < RTE_ETHER_MIN_MTU))
 		return -EINVAL;
 
+	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
+	header_len = (in_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK) *
+	    RTE_IPV4_IHL_MULTIPLIER;
+
+	/* Check IP header length */
+	if (unlikely(pkt_in->data_len < header_len) ||
+	    unlikely(mtu_size < header_len))
+		return -EINVAL;
+
 	/*
 	 * Ensure the IP payload length of all fragments is aligned to a
 	 * multiple of 8 bytes as per RFC791 section 2.3.
 	 */
-	frag_size = RTE_ALIGN_FLOOR((mtu_size - sizeof(struct rte_ipv4_hdr)),
+	frag_size = RTE_ALIGN_FLOOR((mtu_size - header_len),
 				    IPV4_HDR_FO_ALIGN);
 
-	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
 	flag_offset = rte_cpu_to_be_16(in_hdr->fragment_offset);
 
 	/* If Don't Fragment flag is set */
@@ -102,11 +110,11 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 
 	/* Check that pkts_out is big enough to hold all fragments */
 	if (unlikely(frag_size * nb_pkts_out <
-	    (uint16_t)(pkt_in->pkt_len - sizeof(struct rte_ipv4_hdr))))
+	    (uint16_t)(pkt_in->pkt_len - header_len)))
 		return -EINVAL;
 
 	in_seg = pkt_in;
-	in_seg_data_pos = sizeof(struct rte_ipv4_hdr);
+	in_seg_data_pos = header_len;
 	out_pkt_pos = 0;
 	fragment_offset = 0;
 
@@ -124,8 +132,8 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 		}
 
 		/* Reserve space for the IP header that will be built later */
-		out_pkt->data_len = sizeof(struct rte_ipv4_hdr);
-		out_pkt->pkt_len = sizeof(struct rte_ipv4_hdr);
+		out_pkt->data_len = header_len;
+		out_pkt->pkt_len = header_len;
 		frag_bytes_remaining = frag_size;
 
 		out_seg_prev = out_pkt;
@@ -176,14 +184,14 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 
 		out_hdr = rte_pktmbuf_mtod(out_pkt, struct rte_ipv4_hdr *);
 
-		__fill_ipv4hdr_frag(out_hdr, in_hdr,
+		__fill_ipv4hdr_frag(out_hdr, in_hdr, header_len,
 		    (uint16_t)out_pkt->pkt_len,
 		    flag_offset, fragment_offset, more_in_segs);
 
 		fragment_offset = (uint16_t)(fragment_offset +
-		    out_pkt->pkt_len - sizeof(struct rte_ipv4_hdr));
+		    out_pkt->pkt_len - header_len);
 
-		out_pkt->l3_len = sizeof(struct rte_ipv4_hdr);
+		out_pkt->l3_len = header_len;
 
 		/* Write the fragment to the output list */
 		pkts_out[out_pkt_pos] = out_pkt;
-- 
2.17.0


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [dpdk-stable] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option
       [not found] <20200501132749.130120-1-583493798@qq.com>
@ 2020-05-01 15:32 ` Ananyev, Konstantin
  0 siblings, 0 replies; 6+ messages in thread
From: Ananyev, Konstantin @ 2020-05-01 15:32 UTC (permalink / raw)
  To: Pu Xu; +Cc: dev, olivier.matz, stable

Hi,

> When fragmenting ipv4 packet, the data offset should be calculated through the ihl field in ip header rather than using sizeof(struct
> rte_ipv4_hdr).

There are few checkpatch errro/warnings:
http://mails.dpdk.org/archives/test-report/2020-May/129803.html
please fix.

> 
> Fixes: a7c528e5d71f ("net: add rte prefix to IP structure")

AFAIK, this commit didn't change anything in ip_frag code.
It was just a mechanic renaming for some public structs.
Commit-id that you provided in your previous patch version
Seems more relevant.

With these things fixed:
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>


> Cc: olivier.matz@6wind.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Pu Xu <583493798@qq.com>
> ---
>  lib/librte_ip_frag/rte_ipv4_fragmentation.c | 33 +++++++++++++--------
>  1 file changed, 20 insertions(+), 13 deletions(-)
> 
> diff --git a/lib/librte_ip_frag/rte_ipv4_fragmentation.c b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
> index e9de335ae..ee0049e09 100644
> --- a/lib/librte_ip_frag/rte_ipv4_fragmentation.c
> +++ b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
> @@ -23,10 +23,10 @@
>  #define	IPV4_HDR_FO_ALIGN			(1 << RTE_IPV4_HDR_FO_SHIFT)
> 
>  static inline void __fill_ipv4hdr_frag(struct rte_ipv4_hdr *dst,
> -		const struct rte_ipv4_hdr *src, uint16_t len, uint16_t fofs,
> -		uint16_t dofs, uint32_t mf)
> +		const struct rte_ipv4_hdr *src, uint16_t header_len,
> +        uint16_t len, uint16_t fofs, uint16_t dofs, uint32_t mf)
>  {
> -	rte_memcpy(dst, src, sizeof(*dst));
> +	rte_memcpy(dst, src, header_len);
>  	fofs = (uint16_t)(fofs + (dofs >> RTE_IPV4_HDR_FO_SHIFT));
>  	fofs = (uint16_t)(fofs | mf << RTE_IPV4_HDR_MF_SHIFT);
>  	dst->fragment_offset = rte_cpu_to_be_16(fofs);
> @@ -74,7 +74,7 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
>  	struct rte_ipv4_hdr *in_hdr;
>  	uint32_t out_pkt_pos, in_seg_data_pos;
>  	uint32_t more_in_segs;
> -	uint16_t fragment_offset, flag_offset, frag_size;
> +	uint16_t fragment_offset, flag_offset, frag_size, header_len;
>  	uint16_t frag_bytes_remaining;
> 
>  	/*
> @@ -86,14 +86,21 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
>  	    unlikely(mtu_size < RTE_ETHER_MIN_MTU))
>  		return -EINVAL;
> 
> +	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
> +	header_len = (in_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK) * RTE_IPV4_IHL_MULTIPLIER;
> +
> +	/* Check IP header length */
> +	if (unlikely(pkt_in->data_len < header_len) ||
> +	    unlikely(mtu_size < header_len))
> +		return -EINVAL;
> +
>  	/*
>  	 * Ensure the IP payload length of all fragments is aligned to a
>  	 * multiple of 8 bytes as per RFC791 section 2.3.
>  	 */
> -	frag_size = RTE_ALIGN_FLOOR((mtu_size - sizeof(struct rte_ipv4_hdr)),
> +	frag_size = RTE_ALIGN_FLOOR((mtu_size - header_len),
>  				    IPV4_HDR_FO_ALIGN);
> 
> -	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
>  	flag_offset = rte_cpu_to_be_16(in_hdr->fragment_offset);
> 
>  	/* If Don't Fragment flag is set */
> @@ -102,11 +109,11 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
> 
>  	/* Check that pkts_out is big enough to hold all fragments */
>  	if (unlikely(frag_size * nb_pkts_out <
> -	    (uint16_t)(pkt_in->pkt_len - sizeof(struct rte_ipv4_hdr))))
> +	    (uint16_t)(pkt_in->pkt_len - header_len)))
>  		return -EINVAL;
> 
>  	in_seg = pkt_in;
> -	in_seg_data_pos = sizeof(struct rte_ipv4_hdr);
> +	in_seg_data_pos = header_len;
>  	out_pkt_pos = 0;
>  	fragment_offset = 0;
> 
> @@ -124,8 +131,8 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
>  		}
> 
>  		/* Reserve space for the IP header that will be built later */
> -		out_pkt->data_len = sizeof(struct rte_ipv4_hdr);
> -		out_pkt->pkt_len = sizeof(struct rte_ipv4_hdr);
> +		out_pkt->data_len = header_len;
> +		out_pkt->pkt_len = header_len;
>  		frag_bytes_remaining = frag_size;
> 
>  		out_seg_prev = out_pkt;
> @@ -176,14 +183,14 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
> 
>  		out_hdr = rte_pktmbuf_mtod(out_pkt, struct rte_ipv4_hdr *);
> 
> -		__fill_ipv4hdr_frag(out_hdr, in_hdr,
> +		__fill_ipv4hdr_frag(out_hdr, in_hdr, header_len,
>  		    (uint16_t)out_pkt->pkt_len,
>  		    flag_offset, fragment_offset, more_in_segs);
> 
>  		fragment_offset = (uint16_t)(fragment_offset +
> -		    out_pkt->pkt_len - sizeof(struct rte_ipv4_hdr));
> +		    out_pkt->pkt_len - header_len);
> 
> -		out_pkt->l3_len = sizeof(struct rte_ipv4_hdr);
> +		out_pkt->l3_len = header_len;
> 
>  		/* Write the fragment to the output list */
>  		pkts_out[out_pkt_pos] = out_pkt;
> --
> 2.17.0
> 


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [dpdk-stable] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option
@ 2020-05-01 13:50 Pu Xu
  0 siblings, 0 replies; 6+ messages in thread
From: Pu Xu @ 2020-05-01 13:50 UTC (permalink / raw)
  To: cuanduo; +Cc: dev, Pu Xu, olivier.matz, stable

When fragmenting ipv4 packet, the data offset should be calculated through the ihl field in ip header rather than using sizeof(struct rte_ipv4_hdr).

Fixes: a7c528e5d71f ("net: add rte prefix to IP structure")
Cc: olivier.matz@6wind.com
Cc: stable@dpdk.org

Signed-off-by: Pu Xu <583493798@qq.com>
---
 lib/librte_ip_frag/rte_ipv4_fragmentation.c | 33 +++++++++++++--------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/lib/librte_ip_frag/rte_ipv4_fragmentation.c b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
index e9de335ae..ee0049e09 100644
--- a/lib/librte_ip_frag/rte_ipv4_fragmentation.c
+++ b/lib/librte_ip_frag/rte_ipv4_fragmentation.c
@@ -23,10 +23,10 @@
 #define	IPV4_HDR_FO_ALIGN			(1 << RTE_IPV4_HDR_FO_SHIFT)
 
 static inline void __fill_ipv4hdr_frag(struct rte_ipv4_hdr *dst,
-		const struct rte_ipv4_hdr *src, uint16_t len, uint16_t fofs,
-		uint16_t dofs, uint32_t mf)
+		const struct rte_ipv4_hdr *src, uint16_t header_len,
+        uint16_t len, uint16_t fofs, uint16_t dofs, uint32_t mf)
 {
-	rte_memcpy(dst, src, sizeof(*dst));
+	rte_memcpy(dst, src, header_len);
 	fofs = (uint16_t)(fofs + (dofs >> RTE_IPV4_HDR_FO_SHIFT));
 	fofs = (uint16_t)(fofs | mf << RTE_IPV4_HDR_MF_SHIFT);
 	dst->fragment_offset = rte_cpu_to_be_16(fofs);
@@ -74,7 +74,7 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 	struct rte_ipv4_hdr *in_hdr;
 	uint32_t out_pkt_pos, in_seg_data_pos;
 	uint32_t more_in_segs;
-	uint16_t fragment_offset, flag_offset, frag_size;
+	uint16_t fragment_offset, flag_offset, frag_size, header_len;
 	uint16_t frag_bytes_remaining;
 
 	/*
@@ -86,14 +86,21 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 	    unlikely(mtu_size < RTE_ETHER_MIN_MTU))
 		return -EINVAL;
 
+	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
+	header_len = (in_hdr->version_ihl & RTE_IPV4_HDR_IHL_MASK) * RTE_IPV4_IHL_MULTIPLIER;
+
+	/* Check IP header length */
+	if (unlikely(pkt_in->data_len < header_len) ||
+	    unlikely(mtu_size < header_len))
+		return -EINVAL;
+
 	/*
 	 * Ensure the IP payload length of all fragments is aligned to a
 	 * multiple of 8 bytes as per RFC791 section 2.3.
 	 */
-	frag_size = RTE_ALIGN_FLOOR((mtu_size - sizeof(struct rte_ipv4_hdr)),
+	frag_size = RTE_ALIGN_FLOOR((mtu_size - header_len),
 				    IPV4_HDR_FO_ALIGN);
 
-	in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv4_hdr *);
 	flag_offset = rte_cpu_to_be_16(in_hdr->fragment_offset);
 
 	/* If Don't Fragment flag is set */
@@ -102,11 +109,11 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 
 	/* Check that pkts_out is big enough to hold all fragments */
 	if (unlikely(frag_size * nb_pkts_out <
-	    (uint16_t)(pkt_in->pkt_len - sizeof(struct rte_ipv4_hdr))))
+	    (uint16_t)(pkt_in->pkt_len - header_len)))
 		return -EINVAL;
 
 	in_seg = pkt_in;
-	in_seg_data_pos = sizeof(struct rte_ipv4_hdr);
+	in_seg_data_pos = header_len;
 	out_pkt_pos = 0;
 	fragment_offset = 0;
 
@@ -124,8 +131,8 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 		}
 
 		/* Reserve space for the IP header that will be built later */
-		out_pkt->data_len = sizeof(struct rte_ipv4_hdr);
-		out_pkt->pkt_len = sizeof(struct rte_ipv4_hdr);
+		out_pkt->data_len = header_len;
+		out_pkt->pkt_len = header_len;
 		frag_bytes_remaining = frag_size;
 
 		out_seg_prev = out_pkt;
@@ -176,14 +183,14 @@ rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in,
 
 		out_hdr = rte_pktmbuf_mtod(out_pkt, struct rte_ipv4_hdr *);
 
-		__fill_ipv4hdr_frag(out_hdr, in_hdr,
+		__fill_ipv4hdr_frag(out_hdr, in_hdr, header_len,
 		    (uint16_t)out_pkt->pkt_len,
 		    flag_offset, fragment_offset, more_in_segs);
 
 		fragment_offset = (uint16_t)(fragment_offset +
-		    out_pkt->pkt_len - sizeof(struct rte_ipv4_hdr));
+		    out_pkt->pkt_len - header_len);
 
-		out_pkt->l3_len = sizeof(struct rte_ipv4_hdr);
+		out_pkt->l3_len = header_len;
 
 		/* Write the fragment to the output list */
 		pkts_out[out_pkt_pos] = out_pkt;
-- 
2.17.0



^ permalink raw reply	[flat|nested] 6+ messages in thread

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Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-01 16:11 [dpdk-stable] [PATCH] ip_frag: fix fragmenting ipv4 packet with header option Pu Xu
2020-05-01 20:43 ` [dpdk-stable] [dpdk-dev] " Ananyev, Konstantin
2020-05-24 15:27   ` Thomas Monjalon
  -- strict thread matches above, loose matches on Subject: below --
2020-05-01 16:16 [dpdk-stable] " Pu Xu
     [not found] <20200501132749.130120-1-583493798@qq.com>
2020-05-01 15:32 ` Ananyev, Konstantin
2020-05-01 13:50 Pu Xu

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