* [PATCH] conf: Fix mask calculation from prefix_len in conf_print()
@ 2022-11-09 17:38 Stefano Brivio
2022-11-10 0:14 ` David Gibson
0 siblings, 1 reply; 2+ messages in thread
From: Stefano Brivio @ 2022-11-09 17:38 UTC (permalink / raw)
To: passt-dev; +Cc: David Gibson, Paul Holzinger
Reported-by: Paul Holzinger <pholzing@redhat.com>
Fixes: dd09cceaee21 ("Minor improvements to IPv4 netmask handling")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
---
conf.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/conf.c b/conf.c
index bfecdff..1adcf83 100644
--- a/conf.c
+++ b/conf.c
@@ -884,7 +884,10 @@ static void conf_print(const struct ctx *c)
if (c->ifi4) {
if (!c->no_dhcp) {
- uint32_t mask = htonl(0xffffffff << c->ip4.prefix_len);
+ uint32_t mask;
+
+ mask = htonl(0xffffffff << (32 - c->ip4.prefix_len));
+
info("DHCP:");
info(" assign: %s",
inet_ntop(AF_INET, &c->ip4.addr, buf4, sizeof(buf4)));
--
@@ -884,7 +884,10 @@ static void conf_print(const struct ctx *c)
if (c->ifi4) {
if (!c->no_dhcp) {
- uint32_t mask = htonl(0xffffffff << c->ip4.prefix_len);
+ uint32_t mask;
+
+ mask = htonl(0xffffffff << (32 - c->ip4.prefix_len));
+
info("DHCP:");
info(" assign: %s",
inet_ntop(AF_INET, &c->ip4.addr, buf4, sizeof(buf4)));
--
2.35.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] conf: Fix mask calculation from prefix_len in conf_print()
2022-11-09 17:38 [PATCH] conf: Fix mask calculation from prefix_len in conf_print() Stefano Brivio
@ 2022-11-10 0:14 ` David Gibson
0 siblings, 0 replies; 2+ messages in thread
From: David Gibson @ 2022-11-10 0:14 UTC (permalink / raw)
To: Stefano Brivio; +Cc: passt-dev, Paul Holzinger
[-- Attachment #1: Type: text/plain, Size: 1073 bytes --]
On Wed, Nov 09, 2022 at 06:38:33PM +0100, Stefano Brivio wrote:
> Reported-by: Paul Holzinger <pholzing@redhat.com>
> Fixes: dd09cceaee21 ("Minor improvements to IPv4 netmask handling")
> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> conf.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/conf.c b/conf.c
> index bfecdff..1adcf83 100644
> --- a/conf.c
> +++ b/conf.c
> @@ -884,7 +884,10 @@ static void conf_print(const struct ctx *c)
>
> if (c->ifi4) {
> if (!c->no_dhcp) {
> - uint32_t mask = htonl(0xffffffff << c->ip4.prefix_len);
> + uint32_t mask;
> +
> + mask = htonl(0xffffffff << (32 - c->ip4.prefix_len));
> +
> info("DHCP:");
> info(" assign: %s",
> inet_ntop(AF_INET, &c->ip4.addr, buf4, sizeof(buf4)));
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-11-09 17:38 [PATCH] conf: Fix mask calculation from prefix_len in conf_print() Stefano Brivio
2022-11-10 0:14 ` David Gibson
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