diff options
Diffstat (limited to 'plugins-root/check_dhcp.c')
| -rw-r--r-- | plugins-root/check_dhcp.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/plugins-root/check_dhcp.c b/plugins-root/check_dhcp.c index 904d43ef..db673893 100644 --- a/plugins-root/check_dhcp.c +++ b/plugins-root/check_dhcp.c @@ -313,7 +313,8 @@ int get_hardware_address(int sock,char *interface_name){ #if defined(__linux__) struct ifreq ifr; - strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name)); + strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name)-1); + ifr.ifr_name[sizeof(ifr.ifr_name)-1]='\0'; /* try and grab hardware address of requested interface */ if(ioctl(sock,SIOCGIFHWADDR,&ifr)<0){ @@ -773,14 +774,16 @@ int create_dhcp_socket(void){ /* bind socket to interface */ #if defined(__linux__) - strncpy(interface.ifr_ifrn.ifrn_name,network_interface_name,IFNAMSIZ); + strncpy(interface.ifr_ifrn.ifrn_name,network_interface_name,IFNAMSIZ-1); + interface.ifr_ifrn.ifrn_name[IFNAMSIZ-1]='\0'; if(setsockopt(sock,SOL_SOCKET,SO_BINDTODEVICE,(char *)&interface,sizeof(interface))<0){ printf(_("Error: Could not bind socket to interface %s. Check your privileges...\n"),network_interface_name); exit(STATE_UNKNOWN); } #else - strncpy(interface.ifr_name,network_interface_name,IFNAMSIZ); + strncpy(interface.ifr_name,network_interface_name,IFNAMSIZ-1); + interface.ifr_name[IFNAMSIZ-1]='\0'; #endif /* bind the socket */ |