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Can't use strncpy() to copy strings that aren't NUL-terminated to 

begin with.
pull/1/head
Michael Brown 2007-07-01 03:22:28 +01:00
parent 31fe5b9415
commit 3bf5eb49d0
1 changed files with 8 additions and 2 deletions
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10
src/net/udp/dhcp.c
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@ -153,10 +153,16 @@ static int set_dhcp_packet_option ( struct dhcp_packet *dhcppkt,
memcpy ( &dhcphdr->siaddr, data, sizeof ( dhcphdr->siaddr ) ); memcpy ( &dhcphdr->siaddr, data, sizeof ( dhcphdr->siaddr ) );
return 0; return 0;
case DHCP_TFTP_SERVER_NAME: case DHCP_TFTP_SERVER_NAME:
strncpy ( dhcphdr->sname, data, sizeof ( dhcphdr->sname ) ); memset ( dhcphdr->sname, 0, sizeof ( dhcphdr->sname ) );
if ( len > sizeof ( dhcphdr->sname ) )
len = sizeof ( dhcphdr->sname );
memcpy ( dhcphdr->sname, data, len );
return 0; return 0;
case DHCP_BOOTFILE_NAME: case DHCP_BOOTFILE_NAME:
strncpy ( dhcphdr->file, data, sizeof ( dhcphdr->file ) ); memset ( dhcphdr->file, 0, sizeof ( dhcphdr->file ) );
if ( len > sizeof ( dhcphdr->file ) )
len = sizeof ( dhcphdr->file );
memcpy ( dhcphdr->file, data, len );
return 0; return 0;
default: default:
/* Continue processing as normal */ /* Continue processing as normal */