diff options
| -rw-r--r-- | contrib/check_dhcp.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/contrib/check_dhcp.c b/contrib/check_dhcp.c index 24b82f98..2aea579d 100644 --- a/contrib/check_dhcp.c +++ b/contrib/check_dhcp.c @@ -515,6 +515,7 @@ int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, st /* creates a socket for DHCP communication */ int create_dhcp_socket(void){ struct sockaddr_in myname; + struct ifreq interface; int sock; int flag=1; @@ -549,6 +550,13 @@ int create_dhcp_socket(void){ exit(STATE_UNKNOWN); } + /* bind socket to interface */ + strncpy(interface.ifr_ifrn.ifrn_name,network_interface_name,IFNAMSIZ); + 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); + } + /* bind the socket */ if(bind(sock,(struct sockaddr *)&myname,sizeof(myname))<0){ printf("Error: Could not bind to DHCP socket (port %d)! Check your privileges...\n",DHCP_CLIENT_PORT); |