DPDK patches and discussions
 help / color / mirror / Atom feed
From: Gregory Etelson <getelson@nvidia.com>
To: <dev@dpdk.org>, <getelson@nvidia.com>
Cc: <rasland@nvidia.com>, Ferruh Yigit <ferruh.yigit@intel.com>,
	<stable@dpdk.org>, Ori Kam <orika@nvidia.com>,
	Xiaoyun Li <xiaoyun.li@intel.com>, Wei Zhao <wei.zhao1@intel.com>
Subject: [PATCH] app/testpmd: fix hex string parser input length
Date: Tue, 23 Nov 2021 11:00:05 +0200
Message-ID: <20211123090005.24707-1-getelson@nvidia.com> (raw)

Current hex string parser assumes input has even characters number.
The parser fails input string with odd length.

The patch parses hex stringhs with even and odd length.

Cc: stable@dpdk.org

Fixes: 169a9fed1f4c ("app/testpmd: fix hex string parser support for flow API")
Signed-off-by: Gregory Etelson <getelson@nvidia.com>
---
 app/test-pmd/cmdline_flow.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index 1b00ae507b..2b90a4a23a 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -7702,9 +7702,7 @@ parse_string(struct context *ctx, const struct token *token,
 static int
 parse_hex_string(const char *src, uint8_t *dst, uint32_t *size)
 {
-	char *c = NULL;
-	uint32_t i, len;
-	char tmp[3];
+	uint32_t left = *size;
 
 	/* Check input parameters */
 	if ((src == NULL) ||
@@ -7714,19 +7712,21 @@ parse_hex_string(const char *src, uint8_t *dst, uint32_t *size)
 		return -1;
 
 	/* Convert chars to bytes */
-	for (i = 0, len = 0; i < *size; i += 2) {
-		snprintf(tmp, 3, "%s", src + i);
-		dst[len++] = strtoul(tmp, &c, 16);
-		if (*c != 0) {
-			len--;
-			dst[len] = 0;
-			*size = len;
-			return -1;
+	while (left) {
+		char tmp[3], *end = tmp;
+		uint32_t read_lim = left & 1 ? 1 : 2;
+
+		snprintf(tmp, read_lim + 1, "%s", src);
+		*dst = strtoul(tmp, &end, 16);
+		if (*end) {
+			*dst = 0;
+			*size = *size - left;
 		}
+		left -= read_lim;
+		src += read_lim;
+		dst++;
 	}
-	dst[len] = 0;
-	*size = len;
-
+	*dst = 0;
 	return 0;
 }
 
-- 
2.34.0


             reply	other threads:[~2021-11-23  9:00 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-23  9:00 Gregory Etelson [this message]
2021-11-23 11:57 ` [PATCH v2] " Gregory Etelson
2021-11-24 12:33 ` [PATCH v3] " Gregory Etelson
2021-11-24 16:37   ` Ferruh Yigit

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20211123090005.24707-1-getelson@nvidia.com \
    --to=getelson@nvidia.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=orika@nvidia.com \
    --cc=rasland@nvidia.com \
    --cc=stable@dpdk.org \
    --cc=wei.zhao1@intel.com \
    --cc=xiaoyun.li@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ http://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git