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Compile-time check on buffer sizes for leasefile parsing code.

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This commit is contained in:
Simon Kelley
2016-07-22 21:37:59 +01:00
parent 6b1c464d6d
commit bf4e62c19e
4 changed files with 21 additions and 10 deletions
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16
src/dhcp-common.c
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@@ -20,11 +20,11 @@
void dhcp_common_init(void)
{
/* These each hold a DHCP option max size 255
and get a terminating zero added */
daemon->dhcp_buff = safe_malloc(256);
daemon->dhcp_buff2 = safe_malloc(256);
daemon->dhcp_buff3 = safe_malloc(256);
/* These each hold a DHCP option max size 255
and get a terminating zero added */
daemon->dhcp_buff = safe_malloc(DHCP_BUFF_SZ);
daemon->dhcp_buff2 = safe_malloc(DHCP_BUFF_SZ);
daemon->dhcp_buff3 = safe_malloc(DHCP_BUFF_SZ);
/* dhcp_packet is used by v4 and v6, outpacket only by v6
sizeof(struct dhcp_packet) is as good an initial size as any,
@@ -855,14 +855,14 @@ void log_context(int family, struct dhcp_context *context)
if (context->flags & CONTEXT_RA_STATELESS)
{
if (context->flags & CONTEXT_TEMPLATE)
strncpy(daemon->dhcp_buff, context->template_interface, 256);
strncpy(daemon->dhcp_buff, context->template_interface, DHCP_BUFF_SZ);
else
strcpy(daemon->dhcp_buff, daemon->addrbuff);
}
else
#endif
inet_ntop(family, start, daemon->dhcp_buff, 256);
inet_ntop(family, end, daemon->dhcp_buff3, 256);
inet_ntop(family, start, daemon->dhcp_buff, DHCP_BUFF_SZ);
inet_ntop(family, end, daemon->dhcp_buff3, DHCP_BUFF_SZ);
my_syslog(MS_DHCP | LOG_INFO,
(context->flags & CONTEXT_RA_STATELESS) ?
_("%s stateless on %s%.0s%.0s%s") :