--- ../nplg/plugins/check_dhcp.c 2005-01-28 15:00:58.000000000 +0100
+++ ./plugins/check_dhcp.c 2005-06-08 15:28:58.000000000 +0200
@@ -22,12 +22,18 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
-* $Id: check_dhcp.c,v 1.7 2005/01/25 18:11:21 harpermann Exp $
+*--------------------------------------------------------------------------
+* Unicast mode was originally implemented by Heiti of Boras Kommun with
+* general improvements as well as usability fixes and "forward"-porting by
+* Andreas Ericsson of OP5 AB.
+*--------------------------------------------------------------------------
+*
+* $Id: check_dhcp.c,v 1.9 2005/06/07 15:57:53 exon Exp $
*
*****************************************************************************/
const char *progname = "check_dhcp";
-const char *revision = "$Revision: 1.7 $";
+const char *revision = "$Revision: 1.9 $";
const char *copyright = "2001-2004";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
@@ -64,8 +70,8 @@
#elif defined(__sun__) || defined(__solaris__) || defined(__hpux__)
-#define INSAP 22
-#define OUTSAP 24
+#define INSAP 22
+#define OUTSAP 24
#include <signal.h>
#include <ctype.h>
@@ -73,19 +79,17 @@
#include <sys/poll.h>
#include <sys/dlpi.h>
-#define bcopy(source, destination, length) memcpy(destination, source, length)
-
-#define AREA_SZ 5000 /* buffer length in bytes */
+#define AREA_SZ 5000 /* buffer length in bytes */
static u_long ctl_area[AREA_SZ];
static u_long dat_area[AREA_SZ];
-static struct strbuf ctl = {AREA_SZ, 0, (char *)ctl_area};
-static struct strbuf dat = {AREA_SZ, 0, (char *)dat_area};
+static struct strbuf ctl = { AREA_SZ, 0, (char *)ctl_area };
+static struct strbuf dat = { AREA_SZ, 0, (char *)dat_area };
-#define GOT_CTRL 1
-#define GOT_DATA 2
-#define GOT_BOTH 3
-#define GOT_INTR 4
-#define GOT_ERR 128
+#define GOT_CTRL 1
+#define GOT_DATA 2
+#define GOT_BOTH 3
+#define GOT_INTR 4
+#define GOT_ERR 128
#define u_int8_t uint8_t
#define u_int16_t uint16_t
@@ -97,26 +101,11 @@
static int put_both(int, int, int, int);
static int dl_open(const char *, int, int *);
static int dl_bind(int, int, u_char *);
-long mac_addr_dlpi( const char *, int, u_char *);
+static long mac_addr_dlpi(const char *, int, u_char *);
#endif
-#define HAVE_GETOPT_H
-
-
-/**** Common definitions ****/
-
-#define STATE_OK 0
-#define STATE_WARNING 1
-#define STATE_CRITICAL 2
-#define STATE_UNKNOWN -1
-
-#define OK 0
-#define ERROR -1
-
-#define FALSE 0
-#define TRUE 1
-
+static int add_requested_server(struct in_addr server_address);
/**** DHCP definitions ****/
@@ -126,39 +115,39 @@
#define MAX_DHCP_OPTIONS_LENGTH 312
-typedef struct dhcp_packet_struct{
- u_int8_t op; /* packet type */
- u_int8_t htype; /* type of hardware address for this machine (Ethernet, etc) */
- u_int8_t hlen; /* length of hardware address (of this machine) */
- u_int8_t hops; /* hops */
- u_int32_t xid; /* random transaction id number - chosen by this machine */
- u_int16_t secs; /* seconds used in timing */
- u_int16_t flags; /* flags */
- struct in_addr ciaddr; /* IP address of this machine (if we already have one) */
- struct in_addr yiaddr; /* IP address of this machine (offered by the DHCP server) */
- struct in_addr siaddr; /* IP address of DHCP server */
- struct in_addr giaddr; /* IP address of DHCP relay */
- unsigned char chaddr [MAX_DHCP_CHADDR_LENGTH]; /* hardware address of this machine */
- char sname [MAX_DHCP_SNAME_LENGTH]; /* name of DHCP server */
- char file [MAX_DHCP_FILE_LENGTH]; /* boot file name (used for diskless booting?) */
- char options[MAX_DHCP_OPTIONS_LENGTH]; /* options */
- }dhcp_packet;
-
-
-typedef struct dhcp_offer_struct{
- struct in_addr server_address; /* address of DHCP server that sent this offer */
- struct in_addr offered_address; /* the IP address that was offered to us */
- u_int32_t lease_time; /* lease time in seconds */
- u_int32_t renewal_time; /* renewal time in seconds */
- u_int32_t rebinding_time; /* rebinding time in seconds */
+typedef struct dhcp_packet_struct {
+ u_int8_t op; /* packet type */
+ u_int8_t htype; /* type of hardware address for this machine (Ethernet, etc) */
+ u_int8_t hlen; /* length of hardware address (of this machine) */
+ u_int8_t hops; /* hops */
+ u_int32_t xid; /* random transaction id number - chosen by this machine */
+ u_int16_t secs; /* seconds used in timing */
+ u_int16_t flags; /* flags */
+ struct in_addr ciaddr; /* IP address of this machine (if we already have one) */
+ struct in_addr yiaddr; /* IP address of this machine (offered by the DHCP server) */
+ struct in_addr siaddr; /* IP address of DHCP server */
+ struct in_addr giaddr; /* IP address of DHCP relay */
+ unsigned char chaddr[MAX_DHCP_CHADDR_LENGTH]; /* hardware address of this machine */
+ char sname[MAX_DHCP_SNAME_LENGTH]; /* name of DHCP server */
+ char file[MAX_DHCP_FILE_LENGTH]; /* boot file name (used for diskless booting?) */
+ char options[MAX_DHCP_OPTIONS_LENGTH]; /* options */
+} dhcp_packet;
+
+
+typedef struct dhcp_offer_struct {
+ struct in_addr server_address; /* address of DHCP server that sent this offer */
+ struct in_addr offered_address; /* the IP address that was offered to us */
+ u_int32_t lease_time; /* lease time in seconds */
+ u_int32_t renewal_time; /* renewal time in seconds */
+ u_int32_t rebinding_time; /* rebinding time in seconds */
struct dhcp_offer_struct *next;
- }dhcp_offer;
+} dhcp_offer;
-typedef struct requested_server_struct{
+typedef struct requested_server_struct {
struct in_addr server_address;
struct requested_server_struct *next;
- }requested_server;
+} requested_server;
#define BOOTREQUEST 1
@@ -183,35 +172,40 @@
#define DHCP_INFINITE_TIME 0xFFFFFFFF
#define DHCP_BROADCAST_FLAG 32768
+#define DHCP_UNICAST_FLAG 0
#define DHCP_SERVER_PORT 67
#define DHCP_CLIENT_PORT 68
-#define ETHERNET_HARDWARE_ADDRESS 1 /* used in htype field of dhcp packet */
-#define ETHERNET_HARDWARE_ADDRESS_LENGTH 6 /* length of Ethernet hardware addresses */
+#define ETH_HW_ADDR 1 /* used in htype field of dhcp packet */
+#define ETH_HW_ADDR_LEN 6 /* length of Ethernet hardware addresses */
-unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH]="";
+u_int8_t unicast_hops = 0; /* number of hops for unicast dhcp */
+struct in_addr my_ip; /* our address (required for relay) */
+struct in_addr dhcp_ip; /* server to query (if in unicast mode) */
+struct sockaddr_in *my_addr; /* used to obtain our address */
+unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH] = "";
-char network_interface_name[8]="eth0";
+char network_interface_name[8] = "eth0";
-u_int32_t packet_xid=0;
+u_int32_t packet_xid = 0;
-u_int32_t dhcp_lease_time=0;
-u_int32_t dhcp_renewal_time=0;
-u_int32_t dhcp_rebinding_time=0;
+u_int32_t dhcp_lease_time = 0;
+u_int32_t dhcp_renewal_time = 0;
+u_int32_t dhcp_rebinding_time = 0;
-int dhcpoffer_timeout=2;
+int dhcpoffer_timeout = 2;
-dhcp_offer *dhcp_offer_list=NULL;
-requested_server *requested_server_list=NULL;
+dhcp_offer *dhcp_offer_list = NULL;
+requested_server *requested_server_list = NULL;
-int valid_responses=0; /* number of valid DHCPOFFERs we received */
-int requested_servers=0;
-int requested_responses=0;
+int valid_responses = 0; /* number of valid DHCPOFFERs we received */
+int requested_servers = 0;
+int requested_responses = 0;
-int request_specific_address=FALSE;
-int received_requested_address=FALSE;
-int verbose=0;
+int request_specific_address = FALSE;
+int received_requested_address = FALSE;
+int verbose = 0;
struct in_addr requested_address;
@@ -221,41 +215,42 @@
void print_usage(void);
void print_help(void);
-int get_hardware_address(int,char *);
+int get_hardware_address(int, char *);
int send_dhcp_discover(int);
int get_dhcp_offer(int);
int get_results(void);
-int add_dhcp_offer(struct in_addr,dhcp_packet *);
+int add_dhcp_offer(struct in_addr, dhcp_packet *);
int free_dhcp_offer_list(void);
int free_requested_server_list(void);
int create_dhcp_socket(void);
-int close_dhcp_socket(int);
-int send_dhcp_packet(void *,int,int,struct sockaddr_in *);
-int receive_dhcp_packet(void *,int,int,int,struct sockaddr_in *);
+int send_dhcp_packet(void *, int, int, struct sockaddr_in *);
+int receive_dhcp_packet(void *, int, int, int, struct sockaddr_in *);
-int main(int argc, char **argv){
+int
+main(int argc, char **argv)
+{
int dhcp_socket;
int result;
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
-
- if(process_arguments(argc,argv)!=OK){
- usage4 (_("Could not parse arguments"));
- }
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+
+ if(process_arguments(argc, argv) != OK) {
+ usage4(_("Could not parse arguments"));
+ }
/* create socket for DHCP communications */
- dhcp_socket=create_dhcp_socket();
+ dhcp_socket = create_dhcp_socket();
/* get hardware address of client machine */
- get_hardware_address(dhcp_socket,network_interface_name);
+ get_hardware_address(dhcp_socket, network_interface_name);
/* send DHCPDISCOVER packet */
send_dhcp_discover(dhcp_socket);
@@ -264,930 +259,967 @@
get_dhcp_offer(dhcp_socket);
/* close socket we created */
- close_dhcp_socket(dhcp_socket);
+ close(dhcp_socket);
/* determine state/plugin output to return */
- result=get_results();
+ result = get_results();
/* free allocated memory */
free_dhcp_offer_list();
free_requested_server_list();
return result;
- }
-
+}
/* determines hardware address on client machine */
-int get_hardware_address(int sock,char *interface_name){
-
+int
+get_hardware_address(int sock, char *interface_name)
+{
int i;
#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));
+
/* try and grab hardware address of requested interface */
- if(ioctl(sock,SIOCGIFHWADDR,&ifr)<0){
- printf(_("Error: Could not get hardware address of interface '%s'\n"),interface_name);
+ if(ioctl(sock, SIOCGIFHWADDR, &ifr) < 0) {
+ printf(_("Error: Could not get hardware address of interface '%s'\n"),
+ interface_name);
exit(STATE_UNKNOWN);
- }
+ }
+ memcpy(&client_hardware_address[0], &ifr.ifr_hwaddr.sa_data, 6);
+
+ /* get the IP of the interface we're using if this is a unicast request */
+ if(unicast_hops) {
+ if(ioctl(sock, SIOCGIFADDR, &ifr) < 0) {
+ printf(_("Error: Could not determine IP-address of interface '%s'\n"),
+ interface_name);
+ exit(STATE_UNKNOWN);
+ }
- memcpy(&client_hardware_address[0],&ifr.ifr_hwaddr.sa_data,6);
+ /* cast it to avoid black pointer magic */
+ my_addr = (struct sockaddr_in *)&ifr.ifr_addr;
+ my_ip.s_addr = my_addr->sin_addr.s_addr;
+ if(verbose)
+ printf("Pretending to be relay client %s\n", inet_ntoa(my_ip));
+ }
#elif defined(__bsd__)
- /* King 2004 see ACKNOWLEDGEMENTS */
+ /* King 2004 see ACKNOWLEDGEMENTS */
- int mib[6], len;
- char *buf;
- unsigned char *ptr;
- struct if_msghdr *ifm;
- struct sockaddr_dl *sdl;
-
- mib[0] = CTL_NET;
- mib[1] = AF_ROUTE;
- mib[2] = 0;
- mib[3] = AF_LINK;
- mib[4] = NET_RT_IFLIST;
-
- if ((mib[5] = if_nametoindex(interface_name)) == 0) {
- printf(_("Error: if_nametoindex error - %s.\n"), strerror(errno));
- exit(STATE_UNKNOWN);
- }
-
- if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
- printf(_("Error: Couldn't get hardware address from %s. sysctl 1 error - %s.\n"), interface_name, strerror(errno));
- exit(STATE_UNKNOWN);
- }
-
- if ((buf = malloc(len)) == NULL) {
- printf(_("Error: Couldn't get hardware address from interface %s. malloc error - %s.\n"), interface_name, strerror(errno));
- exit(4);
- }
-
- if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
- printf(_("Error: Couldn't get hardware address from %s. sysctl 2 error - %s.\n"), interface_name, strerror(errno));
- exit(STATE_UNKNOWN);
- }
-
- ifm = (struct if_msghdr *)buf;
- sdl = (struct sockaddr_dl *)(ifm + 1);
- ptr = (unsigned char *)LLADDR(sdl);
- memcpy(&client_hardware_address[0], ptr, 6) ;
- /* King 2004 */
+ int mib[6], len;
+ char *buf;
+ unsigned char *ptr;
+ struct if_msghdr *ifm;
+ struct sockaddr_dl *sdl;
+
+ mib[0] = CTL_NET;
+ mib[1] = AF_ROUTE;
+ mib[2] = 0;
+ mib[3] = AF_LINK;
+ mib[4] = NET_RT_IFLIST;
+
+ if((mib[5] = if_nametoindex(interface_name)) == 0) {
+ printf(_("Error: if_nametoindex error - %s.\n"), strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+
+ if(sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
+ printf(_("Error: Couldn't get hardware address from %s. sysctl 1 error - %s.\n"),
+ interface_name, strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+
+ if((buf = malloc(len)) == NULL) {
+ printf(_("Error: Couldn't get hardware address from interface %s. malloc error - %s.\n"),
+ interface_name, strerror(errno));
+ exit(4);
+ }
+
+ if(sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
+ printf(_("Error: Couldn't get hardware address from %s. sysctl 2 error - %s.\n"),
+ interface_name, strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+
+ ifm = (struct if_msghdr *)buf;
+ sdl = (struct sockaddr_dl *)(ifm + 1);
+ ptr = (unsigned char *)LLADDR(sdl);
+ memcpy(&client_hardware_address[0], ptr, 6);
+ /* King 2004 */
#elif defined(__sun__) || defined(__solaris__)
- /* Kompf 2000-2003 see ACKNOWLEDGEMENTS */
+ /* Kompf 2000-2003 see ACKNOWLEDGEMENTS */
long stat;
char dev[20] = "/dev/";
char *p;
int unit;
- for (p = interface_name; *p && isalpha(*p); p++)
- /* no-op */ ;
- if ( p != '\0' ) {
- unit = atoi(p) ;
- *p = '\0' ;
- strncat(dev, interface_name, 6) ;
- } else {
- printf(_("Error: can't find unit number in interface_name (%s) - expecting TypeNumber eg lnc0.\n"), interface_name);
+ for(p = interface_name; *p && isalpha(*p); p++) /* no-op */ ;
+
+ if(p != '\0') {
+ unit = atoi(p);
+ *p = '\0';
+ strncat(dev, interface_name, 6);
+ }
+ else {
+ printf(_("Error: can't find unit number in interface_name (%s) - expecting TypeNumber eg lnc0.\n"),
+ interface_name);
exit(STATE_UNKNOWN);
}
stat = mac_addr_dlpi(dev, unit, client_hardware_address);
- if (stat != 0) {
- printf(_("Error: can't read MAC address from DLPI streams interface for device %s unit %d.\n"), dev, unit);
+ if(stat != 0) {
+ printf(_("Error: can't read MAC address from DLPI streams interface for device %s unit %d.\n"),
+ dev, unit);
exit(STATE_UNKNOWN);
}
#elif defined(__hpux__)
long stat;
- char dev[20] = "/dev/dlpi" ;
+ char dev[20] = "/dev/dlpi";
int unit = 0;
stat = mac_addr_dlpi(dev, unit, client_hardware_address);
- if (stat != 0) {
- printf(_("Error: can't read MAC address from DLPI streams interface for device %s unit %d.\n"), dev, unit);
+ if(stat != 0) {
+ printf(_("Error: can't read MAC address from DLPI streams interface for device %s unit %d.\n"),
+ dev, unit);
exit(STATE_UNKNOWN);
}
- /* Kompf 2000-2003 */
+ /* Kompf 2000-2003 */
#else
printf(_("Error: can't get MAC address for this architecture.\n"));
exit(STATE_UNKNOWN);
#endif
- if (verbose) {
+ if(verbose) {
printf(_("Hardware address: "));
- for (i=0; i<6; ++i)
+ for(i = 0; i < 6; ++i)
printf("%2.2x", client_hardware_address[i]);
- printf( "\n");
+ printf("\n");
}
return OK;
- }
+}
/* sends a DHCPDISCOVER broadcast message in an attempt to find DHCP servers */
-int send_dhcp_discover(int sock){
+int
+send_dhcp_discover(int sock)
+{
dhcp_packet discover_packet;
struct sockaddr_in sockaddr_broadcast;
/* clear the packet data structure */
- bzero(&discover_packet,sizeof(discover_packet));
-
+ memset(&discover_packet, 0, sizeof(discover_packet));
/* boot request flag (backward compatible with BOOTP servers) */
- discover_packet.op=BOOTREQUEST;
+ discover_packet.op = BOOTREQUEST;
/* hardware address type */
- discover_packet.htype=ETHERNET_HARDWARE_ADDRESS;
+ discover_packet.htype = ETH_HW_ADDR;
/* length of our hardware address */
- discover_packet.hlen=ETHERNET_HARDWARE_ADDRESS_LENGTH;
-
- discover_packet.hops=0;
+ discover_packet.hlen = ETH_HW_ADDR_LEN;
- /* transaction id is supposed to be random */
+ /* transaction id is supposed to be random. We won't use the address so
+ * we don't care about high entropy here. time() is good enough */
srand(time(NULL));
- packet_xid=random();
- discover_packet.xid=htonl(packet_xid);
+ packet_xid = random();
+ discover_packet.xid = htonl(packet_xid);
/**** WHAT THE HECK IS UP WITH THIS?!? IF I DON'T MAKE THIS CALL, ONLY ONE SERVER RESPONSE IS PROCESSED!!!! ****/
/* downright bizzarre... */
ntohl(discover_packet.xid);
- /*discover_packet.secs=htons(65535);*/
- discover_packet.secs=0xFF;
+ /*discover_packet.secs=htons(65535); */
+ discover_packet.secs = 0xFF;
- /* tell server it should broadcast its response */
- discover_packet.flags=htons(DHCP_BROADCAST_FLAG);
+ /* server needs to know if it should broadcast or unicast its response.
+ * 0x8000L == 32768 == 1 << 15 == broadcast, 0 == unicast */
+ discover_packet.flags = unicast_hops == 0 ? htons(DHCP_BROADCAST_FLAG) : 0;
/* our hardware address */
- memcpy(discover_packet.chaddr,client_hardware_address,ETHERNET_HARDWARE_ADDRESS_LENGTH);
+ memcpy(discover_packet.chaddr, client_hardware_address, ETH_HW_ADDR_LEN);
/* first four bytes of options field is magic cookie (as per RFC 2132) */
- discover_packet.options[0]='\x63';
- discover_packet.options[1]='\x82';
- discover_packet.options[2]='\x53';
- discover_packet.options[3]='\x63';
+ discover_packet.options[0] = '\x63';
+ discover_packet.options[1] = '\x82';
+ discover_packet.options[2] = '\x53';
+ discover_packet.options[3] = '\x63';
/* DHCP message type is embedded in options field */
- discover_packet.options[4]=DHCP_OPTION_MESSAGE_TYPE; /* DHCP message type option identifier */
- discover_packet.options[5]='\x01'; /* DHCP message option length in bytes */
- discover_packet.options[6]=DHCPDISCOVER;
+ discover_packet.options[4] = DHCP_OPTION_MESSAGE_TYPE; /* DHCP message type option identifier */
+ discover_packet.options[5] = '\x01'; /* DHCP message option length in bytes */
+ discover_packet.options[6] = DHCPDISCOVER;
/* the IP address we're requesting */
- if(request_specific_address==TRUE){
- discover_packet.options[7]=DHCP_OPTION_REQUESTED_ADDRESS;
- discover_packet.options[8]='\x04';
- memcpy(&discover_packet.options[9],&requested_address,sizeof(requested_address));
- }
-
- /* send the DHCPDISCOVER packet to broadcast address */
- sockaddr_broadcast.sin_family=AF_INET;
- sockaddr_broadcast.sin_port=htons(DHCP_SERVER_PORT);
- sockaddr_broadcast.sin_addr.s_addr=INADDR_BROADCAST;
- bzero(&sockaddr_broadcast.sin_zero,sizeof(sockaddr_broadcast.sin_zero));
+ if(request_specific_address == TRUE) {
+ discover_packet.options[7] = DHCP_OPTION_REQUESTED_ADDRESS;
+ discover_packet.options[8] = '\x04';
+ memcpy(&discover_packet.options[9], &requested_address,
+ sizeof(requested_address));
+ }
+
+ /* unicast mods goes here */
+ if(unicast_hops)
+ discover_packet.giaddr.s_addr = my_ip.s_addr;
+ discover_packet.hops = unicast_hops;
- if (verbose) {
- printf(_("DHCPDISCOVER to %s port %d\n"),inet_ntoa(sockaddr_broadcast.sin_addr),ntohs(sockaddr_broadcast.sin_port));
- printf("DHCPDISCOVER XID: %lu (0x%X)\n",ntohl(discover_packet.xid),ntohl(discover_packet.xid));
- printf("DHCDISCOVER ciaddr: %s\n",inet_ntoa(discover_packet.ciaddr));
- printf("DHCDISCOVER yiaddr: %s\n",inet_ntoa(discover_packet.yiaddr));
- printf("DHCDISCOVER siaddr: %s\n",inet_ntoa(discover_packet.siaddr));
- printf("DHCDISCOVER giaddr: %s\n",inet_ntoa(discover_packet.giaddr));
+ /* send the DHCPDISCOVER packet to broadcast address */
+ sockaddr_broadcast.sin_family = AF_INET;
+ sockaddr_broadcast.sin_port = htons(DHCP_SERVER_PORT);
+ sockaddr_broadcast.sin_addr.s_addr = unicast_hops == 0 ? INADDR_BROADCAST : dhcp_ip.s_addr;
+ memset(&sockaddr_broadcast.sin_zero, 0, sizeof(sockaddr_broadcast.sin_zero));
+
+
+ if(verbose) {
+ printf(_("DHCPDISCOVER to %s port %d\n"),
+ inet_ntoa(sockaddr_broadcast.sin_addr),
+ ntohs(sockaddr_broadcast.sin_port));
+ printf("DHCPDISCOVER XID: %u (0x%X)\n", ntohl(discover_packet.xid),
+ ntohl(discover_packet.xid));
+ printf("DHCDISCOVER ciaddr: %s\n", inet_ntoa(discover_packet.ciaddr));
+ printf("DHCDISCOVER yiaddr: %s\n", inet_ntoa(discover_packet.yiaddr));
+ printf("DHCDISCOVER siaddr: %s\n", inet_ntoa(discover_packet.siaddr));
+ printf("DHCDISCOVER giaddr: %s\n", inet_ntoa(discover_packet.giaddr));
}
/* send the DHCPDISCOVER packet out */
- send_dhcp_packet(&discover_packet,sizeof(discover_packet),sock,&sockaddr_broadcast);
+ send_dhcp_packet(&discover_packet, sizeof(discover_packet), sock,
+ &sockaddr_broadcast);
- if (verbose)
- printf("\n\n");
+ if(verbose) printf("\n\n");
return OK;
- }
-
-
+}
/* waits for a DHCPOFFER message from one or more DHCP servers */
-int get_dhcp_offer(int sock){
+int
+get_dhcp_offer(int sock)
+{
dhcp_packet offer_packet;
struct sockaddr_in source;
- int result=OK;
- int timeout=1;
- int responses=0;
+ int result = OK;
+ int responses = 0;
int x;
- time_t start_time;
+ time_t dhcp_start_time;
time_t current_time;
- time(&start_time);
+ time(&dhcp_start_time);
/* receive as many responses as we can */
- for(responses=0,valid_responses=0;;){
+ for(responses = 0, valid_responses = 0;;) {
time(¤t_time);
- if((current_time-start_time)>=dhcpoffer_timeout)
+ if((current_time - dhcp_start_time) >= dhcpoffer_timeout)
break;
- if (verbose)
- printf("\n\n");
+ if(verbose) printf("\n\n");
- bzero(&source,sizeof(source));
- bzero(&offer_packet,sizeof(offer_packet));
+ memset(&source, 0, sizeof(source));
+ memset(&offer_packet, 0, sizeof(offer_packet));
- result=OK;
- result=receive_dhcp_packet(&offer_packet,sizeof(offer_packet),sock,dhcpoffer_timeout,&source);
-
- if(result!=OK){
- if (verbose)
- printf(_("Result=ERROR\n"));
+ result = OK;
+ result = receive_dhcp_packet(&offer_packet, sizeof(offer_packet), sock,
+ dhcpoffer_timeout, &source);
+ if(result != OK) {
+ if(verbose) printf(_("Result=ERROR\n"));
continue;
- }
- else{
- if (verbose)
- printf(_("Result=OK\n"));
-
+ }
+ else {
+ if(verbose) printf(_("Result=OK\n"));
responses++;
- }
+ }
- if (verbose) {
- printf(_("DHCPOFFER from IP address %s\n"),inet_ntoa(source.sin_addr));
- printf("DHCPOFFER XID: %lu (0x%X)\n",ntohl(offer_packet.xid),ntohl(offer_packet.xid));
+ if(verbose) {
+ printf(_("DHCPOFFER from IP address %s\n"), inet_ntoa(source.sin_addr));
+ printf("DHCPOFFER XID: %u (0x%X)\n", ntohl(offer_packet.xid),
+ ntohl(offer_packet.xid));
}
/* check packet xid to see if its the same as the one we used in the discover packet */
- if(ntohl(offer_packet.xid)!=packet_xid){
- if (verbose)
- printf(_("DHCPOFFER XID (%lu) did not match DHCPDISCOVER XID (%lu) - ignoring packet\n"),ntohl(offer_packet.xid),packet_xid);
-
+ if(ntohl(offer_packet.xid) != packet_xid) {
+ if(verbose)
+ printf(_("DHCPOFFER XID (%u) did not match DHCPDISCOVER XID (%u) - ignoring packet\n"),
+ ntohl(offer_packet.xid), packet_xid);
continue;
- }
+ }
/* check hardware address */
- result=OK;
- if (verbose)
- printf("DHCPOFFER chaddr: ");
-
- for(x=0;x<ETHERNET_HARDWARE_ADDRESS_LENGTH;x++){
- if (verbose)
- printf("%02X",(unsigned char)offer_packet.chaddr[x]);
+ result = OK;
+ if(verbose) printf("DHCPOFFER chaddr: ");
- if(offer_packet.chaddr[x]!=client_hardware_address[x])
- result=ERROR;
+ for(x = 0; x < ETH_HW_ADDR_LEN; x++) {
+ if(verbose) printf("%02X", (unsigned char)offer_packet.chaddr[x]);
+ if(offer_packet.chaddr[x] != client_hardware_address[x])
+ result = ERROR;
}
- if (verbose)
- printf("\n");
+ if(verbose) printf("\n");
- if(result==ERROR){
- if (verbose)
+ if(result == ERROR) {
+ if(verbose)
printf(_("DHCPOFFER hardware address did not match our own - ignoring packet\n"));
-
continue;
- }
+ }
- if (verbose) {
- printf("DHCPOFFER ciaddr: %s\n",inet_ntoa(offer_packet.ciaddr));
- printf("DHCPOFFER yiaddr: %s\n",inet_ntoa(offer_packet.yiaddr));
- printf("DHCPOFFER siaddr: %s\n",inet_ntoa(offer_packet.siaddr));
- printf("DHCPOFFER giaddr: %s\n",inet_ntoa(offer_packet.giaddr));
+ if(verbose) {
+ printf("DHCPOFFER ciaddr: %s\n", inet_ntoa(offer_packet.ciaddr));
+ printf("DHCPOFFER yiaddr: %s\n", inet_ntoa(offer_packet.yiaddr));
+ printf("DHCPOFFER siaddr: %s\n", inet_ntoa(offer_packet.siaddr));
+ printf("DHCPOFFER giaddr: %s\n", inet_ntoa(offer_packet.giaddr));
}
- add_dhcp_offer(source.sin_addr,&offer_packet);
+ add_dhcp_offer(source.sin_addr, &offer_packet);
valid_responses++;
- }
+ }
- if (verbose) {
- printf(_("Total responses seen on the wire: %d\n"),responses);
- printf(_("Valid responses for this machine: %d\n"),valid_responses);
+ if(verbose) {
+ printf(_("Total responses seen on the wire: %d\n"), responses);
+ printf(_("Valid responses for this machine: %d\n"), valid_responses);
}
return OK;
- }
-
+}
/* sends a DHCP packet */
-int send_dhcp_packet(void *buffer, int buffer_size, int sock, struct sockaddr_in *dest){
- struct sockaddr_in myname;
+int
+send_dhcp_packet(void *buffer, int buffer_size, int sock, struct sockaddr_in *dest)
+{
int result;
- result=sendto(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)dest,sizeof(*dest));
+ result = sendto(sock, (char *)buffer, buffer_size, 0, (struct sockaddr *)dest,
+ sizeof(*dest));
- if (verbose)
- printf(_("send_dhcp_packet result: %d\n"),result);
+ if(verbose) printf(_("send_dhcp_packet result: %d\n"), result);
- if(result<0)
- return ERROR;
+ if(result < 0) return ERROR;
return OK;
- }
-
+}
/* receives a DHCP packet */
-int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, struct sockaddr_in *address){
- struct timeval tv;
- fd_set readfds;
+int
+receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout,
+ struct sockaddr_in *address)
+{
+ struct timeval tv;
+ fd_set readfds;
+ fd_set oobfds;
int recv_result;
socklen_t address_size;
struct sockaddr_in source_address;
+ int nfound;
+ /* wait for data to arrive (up time timeout) */
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+ FD_ZERO(&readfds);
+ FD_ZERO(&oobfds);
+ FD_SET(sock, &readfds);
+ FD_SET(sock, &oobfds);
+ nfound = select(sock + 1, &readfds, NULL, &oobfds, &tv);
+
+ /* make sure some data has arrived */
+ if(!FD_ISSET(sock, &readfds)) {
+ if(verbose)
+ printf(_("nfound: %d, No (more) data received\n"), nfound);
+ return ERROR;
+ }
- /* wait for data to arrive (up time timeout) */
- tv.tv_sec=timeout;
- tv.tv_usec=0;
- FD_ZERO(&readfds);
- FD_SET(sock,&readfds);
- select(sock+1,&readfds,NULL,NULL,&tv);
-
- /* make sure some data has arrived */
- if(!FD_ISSET(sock,&readfds)){
- if (verbose)
- printf(_("No (more) data received\n"));
- return ERROR;
- }
-
- else{
-
- /* why do we need to peek first? i don't know, its a hack. without it, the source address of the first packet received was
- not being interpreted correctly. sigh... */
- bzero(&source_address,sizeof(source_address));
- address_size=sizeof(source_address);
- recv_result=recvfrom(sock,(char *)buffer,buffer_size,MSG_PEEK,(struct sockaddr *)&source_address,&address_size);
- if (verbose)
- printf("recv_result_1: %d\n",recv_result);
- recv_result=recvfrom(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)&source_address,&address_size);
- if (verbose)
- printf("recv_result_2: %d\n",recv_result);
-
- if(recv_result==-1){
- if (verbose) {
- printf(_("recvfrom() failed, "));
- printf("errno: (%d) -> %s\n",errno,strerror(errno));
- }
- return ERROR;
- }
- else{
- if (verbose) {
- printf(_("receive_dhcp_packet() result: %d\n"),recv_result);
- printf(_("receive_dhcp_packet() source: %s\n"),inet_ntoa(source_address.sin_addr));
- }
+ /* why do we need to peek first? i don't know, its a hack. without it,
+ * the source address of the first packet received was not being
+ * interpreted correctly. sigh... */
+ memset(&source_address, 0, sizeof(source_address));
+ address_size = sizeof(source_address);
+ recv_result = recvfrom(sock, (char *)buffer, buffer_size, MSG_PEEK,
+ (struct sockaddr *)&source_address, &address_size);
+
+ if(verbose) printf("recv_result_1: %d\n", recv_result);
+ recv_result = recvfrom(sock, (char *)buffer, buffer_size, 0,
+ (struct sockaddr *)&source_address, &address_size);
+
+ if(verbose) printf("recv_result_2: %d\n", recv_result);
+
+ if(recv_result == -1) {
+ if(verbose) printf("errno: (%d) -> %s\n", errno, strerror(errno));
+ return ERROR;
+ }
+
+ if(verbose) {
+ printf(_("receive_dhcp_packet() result: %d\n"), recv_result);
+ printf(_("receive_dhcp_packet() source: %s\n"),
+ inet_ntoa(source_address.sin_addr));
+ }
- memcpy(address,&source_address,sizeof(source_address));
- return OK;
- }
- }
+ memcpy(address, &source_address, sizeof(source_address));
return OK;
- }
+}
/* creates a socket for DHCP communication */
-int create_dhcp_socket(void){
- struct sockaddr_in myname;
+int
+create_dhcp_socket(void)
+{
+ struct sockaddr_in myname;
struct ifreq interface;
- int sock;
- int flag=1;
+ int sock;
+ int flag = 1;
- /* Set up the address we're going to bind to. */
- bzero(&myname,sizeof(myname));
- myname.sin_family=AF_INET;
- myname.sin_port=htons(DHCP_CLIENT_PORT);
- myname.sin_addr.s_addr=INADDR_ANY; /* listen on any address */
- bzero(&myname.sin_zero,sizeof(myname.sin_zero));
-
- /* create a socket for DHCP communications */
- sock=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
- if(sock<0){
+ /* Set up the address we're going to bind to. */
+ memset(&myname, 0, sizeof(myname));
+ memset(&myname.sin_zero, 0, sizeof(myname.sin_zero));
+ myname.sin_family = AF_INET;
+ /* listen to dhcp server port if we're in unicast mode */
+ myname.sin_port = htons(unicast_hops == 0 ? DHCP_CLIENT_PORT : DHCP_SERVER_PORT);
+ myname.sin_addr.s_addr = unicast_hops == 0 ? INADDR_ANY : my_ip.s_addr;
+
+ /* create a socket for DHCP communications */
+ sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if(sock < 0) {
printf(_("Error: Could not create socket!\n"));
exit(STATE_UNKNOWN);
- }
-
- if (verbose)
- printf("DHCP socket: %d\n",sock);
+ }
- /* set the reuse address flag so we don't get errors when restarting */
- flag=1;
- if(setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char *)&flag,sizeof(flag))<0){
+ /* set the reuse address flag so we don't get errors when restarting */
+ flag = 1;
+ if(setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&flag, sizeof(flag)) < 0) {
printf(_("Error: Could not set reuse address option on DHCP socket!\n"));
exit(STATE_UNKNOWN);
- }
+ }
- /* set the broadcast option - we need this to listen to DHCP broadcast messages */
- if(setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char *)&flag,sizeof flag)<0){
+ /* set the broadcast option - we need this to listen to DHCP broadcast messages */
+ if(setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&flag, sizeof flag) < 0) {
printf(_("Error: Could not set broadcast option on DHCP socket!\n"));
exit(STATE_UNKNOWN);
- }
+ }
/* bind socket to interface */
#if defined(__linux__)
- 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);
+ 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);
- }
+ }
#else
- strncpy(interface.ifr_name,network_interface_name,IFNAMSIZ);
+ strncpy(interface.ifr_name, network_interface_name, IFNAMSIZ);
#endif
- /* 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);
+ /* 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);
exit(STATE_UNKNOWN);
- }
-
- return sock;
- }
-
-
-/* closes DHCP socket */
-int close_dhcp_socket(int sock){
-
- close(sock);
+ }
- return OK;
- }
+ return sock;
+}
/* adds a requested server address to list in memory */
-int add_requested_server(struct in_addr server_address){
+static int
+add_requested_server(struct in_addr server_address)
+{
requested_server *new_server;
- new_server=(requested_server *)malloc(sizeof(requested_server));
- if(new_server==NULL)
+ new_server = (requested_server *) malloc(sizeof(requested_server));
+ if(new_server == NULL)
return ERROR;
- new_server->server_address=server_address;
+ new_server->server_address = server_address;
- new_server->next=requested_server_list;
- requested_server_list=new_server;
+ new_server->next = requested_server_list;
+ requested_server_list = new_server;
requested_servers++;
- if (verbose)
- printf(_("Requested server address: %s\n"),inet_ntoa(new_server->server_address));
+ if(verbose)
+ printf(_("Requested server address: %s\n"),
+ inet_ntoa(new_server->server_address));
return OK;
- }
+}
/* adds a DHCP OFFER to list in memory */
-int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
+int
+add_dhcp_offer(struct in_addr source, dhcp_packet * offer_packet)
+{
dhcp_offer *new_offer;
int x;
int y;
unsigned option_type;
unsigned option_length;
- if(offer_packet==NULL)
- return ERROR;
+ if(offer_packet == NULL) return ERROR;
/* process all DHCP options present in the packet */
- for(x=4;x<MAX_DHCP_OPTIONS_LENGTH;){
+ for(x = 4; x < MAX_DHCP_OPTIONS_LENGTH;) {
/* end of options (0 is really just a pad, but bail out anyway) */
- if((int)offer_packet->options[x]==-1 || (int)offer_packet->options[x]==0)
+ if((int)offer_packet->options[x] == -1 || (int)offer_packet->options[x] == 0)
break;
/* get option type */
- option_type=offer_packet->options[x++];
+ option_type = offer_packet->options[x++];
/* get option length */
- option_length=offer_packet->options[x++];
+ option_length = offer_packet->options[x++];
- if (verbose)
- printf("Option: %d (0x%02X)\n",option_type,option_length);
+ if(verbose)
+ printf("Option: %d (0x%02X)\n", option_type, option_length);
/* get option data */
- if(option_type==DHCP_OPTION_LEASE_TIME) {
- memcpy(&dhcp_lease_time, &offer_packet->options[x],
- sizeof(dhcp_lease_time));
- dhcp_lease_time = ntohl(dhcp_lease_time);
- }
- if(option_type==DHCP_OPTION_RENEWAL_TIME) {
- memcpy(&dhcp_renewal_time, &offer_packet->options[x],
- sizeof(dhcp_renewal_time));
- dhcp_renewal_time = ntohl(dhcp_renewal_time);
- }
- if(option_type==DHCP_OPTION_REBINDING_TIME) {
- memcpy(&dhcp_rebinding_time, &offer_packet->options[x],
- sizeof(dhcp_rebinding_time));
- dhcp_rebinding_time = ntohl(dhcp_rebinding_time);
- }
+ if(option_type == DHCP_OPTION_LEASE_TIME) {
+ memcpy(&dhcp_lease_time, &offer_packet->options[x],
+ sizeof(dhcp_lease_time));
+ dhcp_lease_time = ntohl(dhcp_lease_time);
+ }
+ if(option_type == DHCP_OPTION_RENEWAL_TIME) {
+ memcpy(&dhcp_renewal_time, &offer_packet->options[x],
+ sizeof(dhcp_renewal_time));
+ dhcp_renewal_time = ntohl(dhcp_renewal_time);
+ }
+ if(option_type == DHCP_OPTION_REBINDING_TIME) {
+ memcpy(&dhcp_rebinding_time, &offer_packet->options[x],
+ sizeof(dhcp_rebinding_time));
+ dhcp_rebinding_time = ntohl(dhcp_rebinding_time);
+ }
/* skip option data we're ignoring */
- else
- for(y=0;y<option_length;y++,x++);
- }
+ else for(y = 0; y < option_length; y++, x++) ;
+ }
- if (verbose) {
- if(dhcp_lease_time==DHCP_INFINITE_TIME)
+ if(verbose) {
+ if(dhcp_lease_time == DHCP_INFINITE_TIME)
printf(_("Lease Time: Infinite\n"));
else
- printf(_("Lease Time: %lu seconds\n"),(unsigned long)dhcp_lease_time);
- if(dhcp_renewal_time==DHCP_INFINITE_TIME)
+ printf(_("Lease Time: %lu seconds\n"), (unsigned long)dhcp_lease_time);
+ if(dhcp_renewal_time == DHCP_INFINITE_TIME)
printf(_("Renewal Time: Infinite\n"));
else
- printf(_("Renewal Time: %lu seconds\n"),(unsigned long)dhcp_renewal_time);
- if(dhcp_rebinding_time==DHCP_INFINITE_TIME)
+ printf(_("Renewal Time: %lu seconds\n"),
+ (unsigned long)dhcp_renewal_time);
+ if(dhcp_rebinding_time == DHCP_INFINITE_TIME)
printf(_("Rebinding Time: Infinite\n"));
- printf(_("Rebinding Time: %lu seconds\n"),(unsigned long)dhcp_rebinding_time);
+ printf(_("Rebinding Time: %lu seconds\n"),
+ (unsigned long)dhcp_rebinding_time);
}
- new_offer=(dhcp_offer *)malloc(sizeof(dhcp_offer));
+ new_offer = (dhcp_offer *) malloc(sizeof(dhcp_offer));
- if(new_offer==NULL)
- return ERROR;
+ if(new_offer == NULL) return ERROR;
- new_offer->server_address=source;
- new_offer->offered_address=offer_packet->yiaddr;
- new_offer->lease_time=dhcp_lease_time;
- new_offer->renewal_time=dhcp_renewal_time;
- new_offer->rebinding_time=dhcp_rebinding_time;
+ new_offer->server_address = source;
+ new_offer->offered_address = offer_packet->yiaddr;
+ new_offer->lease_time = dhcp_lease_time;
+ new_offer->renewal_time = dhcp_renewal_time;
+ new_offer->rebinding_time = dhcp_rebinding_time;
- if (verbose) {
- printf(_("Added offer from server @ %s"),inet_ntoa(new_offer->server_address));
- printf(_(" of IP address %s\n"),inet_ntoa(new_offer->offered_address));
+ if(verbose) {
+ printf(_("Added offer from server @ %s"),
+ inet_ntoa(new_offer->server_address));
+ printf(_(" of IP address %s\n"), inet_ntoa(new_offer->offered_address));
}
/* add new offer to head of list */
- new_offer->next=dhcp_offer_list;
- dhcp_offer_list=new_offer;
+ new_offer->next = dhcp_offer_list;
+ dhcp_offer_list = new_offer;
return OK;
- }
+}
/* frees memory allocated to DHCP OFFER list */
-int free_dhcp_offer_list(void){
+int
+free_dhcp_offer_list(void)
+{
dhcp_offer *this_offer;
dhcp_offer *next_offer;
- for(this_offer=dhcp_offer_list;this_offer!=NULL;this_offer=next_offer){
- next_offer=this_offer->next;
+ for(this_offer = dhcp_offer_list; this_offer != NULL; this_offer = next_offer) {
+ next_offer = this_offer->next;
free(this_offer);
- }
+ }
return OK;
- }
+}
/* frees memory allocated to requested server list */
-int free_requested_server_list(void){
+int
+free_requested_server_list(void)
+{
requested_server *this_server;
requested_server *next_server;
- for(this_server=requested_server_list;this_server!=NULL;this_server=next_server){
- next_server=this_server->next;
+ for(this_server = requested_server_list; this_server != NULL;
+ this_server = next_server) {
+ next_server = this_server->next;
free(this_server);
- }
-
+ }
+
return OK;
- }
+}
/* gets state and plugin output to return */
-int get_results(void){
+int
+get_results(void)
+{
dhcp_offer *temp_offer;
requested_server *temp_server;
int result;
- u_int32_t max_lease_time=0;
+ u_int32_t max_lease_time = 0;
- received_requested_address=FALSE;
+ received_requested_address = FALSE;
/* checks responses from requested servers */
- requested_responses=0;
- if(requested_servers>0){
+ requested_responses = 0;
+ if(requested_servers > 0) {
- for(temp_server=requested_server_list;temp_server!=NULL;temp_server=temp_server->next){
+ for(temp_server = requested_server_list; temp_server != NULL;
+ temp_server = temp_server->next) {
- for(temp_offer=dhcp_offer_list;temp_offer!=NULL;temp_offer=temp_offer->next){
+ for(temp_offer = dhcp_offer_list; temp_offer != NULL;
+ temp_offer = temp_offer->next) {
/* get max lease time we were offered */
- if(temp_offer->lease_time>max_lease_time || temp_offer->lease_time==DHCP_INFINITE_TIME)
- max_lease_time=temp_offer->lease_time;
-
+ if(temp_offer->lease_time > max_lease_time
+ || temp_offer->lease_time == DHCP_INFINITE_TIME)
+ max_lease_time = temp_offer->lease_time;
+
/* see if we got the address we requested */
- if(!memcmp(&requested_address,&temp_offer->offered_address,sizeof(requested_address)))
- received_requested_address=TRUE;
+ if(!memcmp(&requested_address, &temp_offer->offered_address,
+ sizeof(requested_address)))
+ received_requested_address = TRUE;
/* see if the servers we wanted a response from talked to us or not */
- if(!memcmp(&temp_offer->server_address,&temp_server->server_address,sizeof(temp_server->server_address))){
- if (verbose) {
- printf(_("DHCP Server Match: Offerer=%s"),inet_ntoa(temp_offer->server_address));
- printf(_(" Requested=%s\n"),inet_ntoa(temp_server->server_address));
- }
+ if(!memcmp(&temp_offer->server_address, &temp_server->server_address,
+ sizeof(temp_server->server_address)))
+ {
+ if(verbose) {
+ printf(_("DHCP Server Match: Offerer=%s"),
+ inet_ntoa(temp_offer->server_address));
+ printf(_(" Requested=%s\n"),
+ inet_ntoa(temp_server->server_address));
+ }
requested_responses++;
- }
- }
- }
-
- }
+ }
+ }
+ }
+ }
/* else check and see if we got our requested address from any server */
- else{
-
- for(temp_offer=dhcp_offer_list;temp_offer!=NULL;temp_offer=temp_offer->next){
-
+ else {
+ for(temp_offer = dhcp_offer_list; temp_offer != NULL;
+ temp_offer = temp_offer->next)
+ {
/* get max lease time we were offered */
- if(temp_offer->lease_time>max_lease_time || temp_offer->lease_time==DHCP_INFINITE_TIME)
- max_lease_time=temp_offer->lease_time;
-
+ if(temp_offer->lease_time > max_lease_time
+ || temp_offer->lease_time == DHCP_INFINITE_TIME)
+ max_lease_time = temp_offer->lease_time;
+
/* see if we got the address we requested */
- if(!memcmp(&requested_address,&temp_offer->offered_address,sizeof(requested_address)))
- received_requested_address=TRUE;
- }
- }
-
- result=STATE_OK;
- if(valid_responses==0)
- result=STATE_CRITICAL;
- else if(requested_servers>0 && requested_responses==0)
- result=STATE_CRITICAL;
- else if(requested_responses<requested_servers)
- result=STATE_WARNING;
- else if(request_specific_address==TRUE && received_requested_address==FALSE)
- result=STATE_WARNING;
+ if(!memcmp(&requested_address, &temp_offer->offered_address,
+ sizeof(requested_address)))
+ received_requested_address = TRUE;
+ }
+ }
+ result = STATE_OK;
+ if(valid_responses == 0)
+ result = STATE_CRITICAL;
+ else if(requested_servers > 0 && requested_responses == 0)
+ result = STATE_CRITICAL;
+ else if(requested_responses < requested_servers)
+ result = STATE_WARNING;
+ else if(request_specific_address == TRUE && received_requested_address == FALSE)
+ result = STATE_WARNING;
- printf("DHCP %s: ",(result==STATE_OK)?"ok":"problem");
+ printf("DHCP %s: ", (result == STATE_OK) ? "ok" : "problem");
/* we didn't receive any DHCPOFFERs */
- if(dhcp_offer_list==NULL){
+ if(dhcp_offer_list == NULL) {
printf(_("No DHCPOFFERs were received.\n"));
return result;
- }
-
- printf(_("Received %d DHCPOFFER(s)"),valid_responses);
+ }
- if(requested_servers>0)
- printf(_(", %s%d of %d requested servers responded"),((requested_responses<requested_servers) && requested_responses>0)?"only ":"",requested_responses,requested_servers);
+ printf(_("Received %d DHCPOFFER(s)"), valid_responses);
- if(request_specific_address==TRUE)
- printf(_(", requested address (%s) was %soffered"),inet_ntoa(requested_address),(received_requested_address==TRUE)?"":_("not "));
+ if(requested_servers > 0)
+ printf(_(", %s%d of %d requested servers responded"),
+ ((requested_responses < requested_servers)
+ && requested_responses > 0) ? "only " : "",
+ requested_responses,
+ requested_servers);
+
+ if(request_specific_address == TRUE)
+ printf(_(", requested address (%s) was %soffered"),
+ inet_ntoa(requested_address),
+ (received_requested_address == TRUE) ? "" : _("not "));
printf(_(", max lease time = "));
- if(max_lease_time==DHCP_INFINITE_TIME)
+ if(max_lease_time == DHCP_INFINITE_TIME)
printf(_("Infinity"));
else
- printf("%lu sec",(unsigned long)max_lease_time);
+ printf("%lu sec", (unsigned long)max_lease_time);
- printf(".\n");
+ puts(".");
return result;
- }
+}
/* process command-line arguments */
-int process_arguments(int argc, char **argv){
- int c;
-
- if(argc<1)
- return ERROR;
-
- c=0;
- while((c+=(call_getopt(argc-c,&argv[c])))<argc){
-
- /*
- if(is_option(argv[c]))
- continue;
- */
- }
-
- return validate_arguments();
- }
-
-
-
-int call_getopt(int argc, char **argv){
- int c=0;
- int i=0;
+int
+process_arguments(int argc, char **argv)
+{
+ int c = 0;
struct in_addr ipaddress;
-
-#ifdef HAVE_GETOPT_H
int option_index = 0;
- static struct option long_options[] =
- {
- {"serverip", required_argument,0,'s'},
- {"requestedip", required_argument,0,'r'},
- {"timeout", required_argument,0,'t'},
- {"interface", required_argument,0,'i'},
- {"verbose", no_argument, 0,'v'},
- {"version", no_argument, 0,'V'},
- {"help", no_argument, 0,'h'},
- {0,0,0,0}
- };
-#endif
- while(1){
-#ifdef HAVE_GETOPT_H
- c=getopt_long(argc,argv,"+hVvt:s:r:t:i:",long_options,&option_index);
-#else
- c=getopt(argc,argv,"+?hVvt:s:r:t:i:");
-#endif
+ static struct option long_options[] = {
+ {"host", required_argument, 0, 'H'},
+ {"serverip", required_argument, 0, 's'},
+ {"requestedip", required_argument, 0, 'r'},
+ {"timeout", required_argument, 0, 't'},
+ {"interface", required_argument, 0, 'i'},
+ {"unicast", required_argument, 0, 'u'},
+ {"verbose", no_argument, 0, 'v'},
+ {"version", no_argument, 0, 'V'},
+ {"help", no_argument, 0, 'h'},
+ {0, 0, 0, 0}
+ };
- i++;
+ while(1) {
+ c = getopt_long(argc, argv, "+hVvt:s:r:t:i:u:", long_options, &option_index);
- if(c==-1||c==EOF||c==1)
+ if(c == -1 || c == EOF || c == 1)
break;
- switch(c){
- case 'w':
- case 'r':
- case 't':
- case 'i':
- i++;
+ switch (c) {
+ case 'u':
+ unicast_hops = (u_int8_t)strtoul(optarg, NULL, 0);
break;
- default:
- break;
- }
-
- switch(c){
-
- case 's': /* DHCP server address */
- if(inet_aton(optarg,&ipaddress))
+ case 's': case 'H': /* DHCP server address */
+ if(inet_aton(optarg, &ipaddress))
add_requested_server(ipaddress);
/*
- else
- usage("Invalid server IP address\n");
- */
+ else
+ usage("Invalid server IP address\n");
+ */
+ inet_aton(optarg, &dhcp_ip);
+ if(verbose)
+ printf("querying %s\n", inet_ntoa(dhcp_ip));
break;
- case 'r': /* address we are requested from DHCP servers */
- if(inet_aton(optarg,&ipaddress)){
- requested_address=ipaddress;
- request_specific_address=TRUE;
- }
+ case 'r': /* address we are requested from DHCP servers */
+ if(inet_aton(optarg, &ipaddress)) {
+ requested_address = ipaddress;
+ request_specific_address = TRUE;
+ }
/*
- else
- usage("Invalid requested IP address\n");
- */
+ else
+ usage("Invalid requested IP address\n");
+ */
break;
- case 't': /* timeout */
-
+ case 't': /* timeout */
/*
- if(is_intnonneg(optarg))
- */
- if(atoi(optarg)>0)
- dhcpoffer_timeout=atoi(optarg);
+ if(is_intnonneg(optarg))
+ */
+ if(atoi(optarg) > 0)
+ dhcpoffer_timeout = atoi(optarg);
/*
- else
- usage("Time interval must be a nonnegative integer\n");
- */
+ else
+ usage("Time interval must be a nonnegative integer\n");
+ */
break;
- case 'i': /* interface name */
-
- strncpy(network_interface_name,optarg,sizeof(network_interface_name)-1);
- network_interface_name[sizeof(network_interface_name)-1]='\x0';
-
+ case 'i': /* interface name */
+ strncpy(network_interface_name, optarg,
+ sizeof(network_interface_name) - 1);
+ network_interface_name[sizeof(network_interface_name) - 1] = '\x0';
break;
- case 'V': /* version */
- print_revision(progname,revision);
+ case 'V': /* version */
+ print_revision(progname, revision);
exit(STATE_OK);
- case 'h': /* help */
+ case 'h': /* help */
print_help();
exit(STATE_OK);
- case 'v': /* verbose */
- verbose=1;
+ case 'v': /* verbose */
+ verbose++;
break;
- case '?': /* help */
- usage2 (_("Unknown argument"), optarg);
+ case '?': /* help */
+ usage2(_("Unknown argument"), optarg);
break;
default:
break;
- }
- }
-
- return i;
- }
+ }
+ }
+
+ return validate_arguments();
+}
-int validate_arguments(void){
+int
+validate_arguments(void)
+{
return OK;
- }
+}
#if defined(__sun__) || defined(__solaris__) || defined(__hpux__)
- /* Kompf 2000-2003 see ACKNOWLEDGEMENTS */
+ /* Kompf 2000-2003 see ACKNOWLEDGEMENTS */
/* get a message from a stream; return type of message */
-static int get_msg(int fd)
+static int
+get_msg(int fd)
{
- int flags = 0;
- int res, ret;
- ctl_area[0] = 0;
- dat_area[0] = 0;
- ret = 0;
- res = getmsg(fd, &ctl, &dat, &flags);
-
- if(res < 0) {
- if(errno == EINTR) {
- return(GOT_INTR);
- } else {
- printf("%s\n", "get_msg FAILED.");
- return(GOT_ERR);
- }
- }
- if(ctl.len > 0) {
- ret |= GOT_CTRL;
- }
- if(dat.len > 0) {
- ret |= GOT_DATA;
- }
- return(ret);
+ int flags = 0;
+ int res, ret;
+
+ ctl_area[0] = 0;
+ dat_area[0] = 0;
+ ret = 0;
+ res = getmsg(fd, &ctl, &dat, &flags);
+
+ if(res < 0) {
+ if(errno == EINTR) {
+ return (GOT_INTR);
+ }
+ else {
+ printf("%s\n", "get_msg FAILED.");
+ return (GOT_ERR);
+ }
+ }
+ if(ctl.len > 0) {
+ ret |= GOT_CTRL;
+ }
+ if(dat.len > 0) {
+ ret |= GOT_DATA;
+ }
+ return (ret);
}
/* verify that dl_primitive in ctl_area = prim */
-static int check_ctrl(int prim)
+static int
+check_ctrl(int prim)
{
- dl_error_ack_t *err_ack = (dl_error_ack_t *)ctl_area;
- if(err_ack->dl_primitive != prim) {
- printf(_("Error: DLPI stream API failed to get MAC in check_ctrl: %s.\n"), strerror(errno));
- exit(STATE_UNKNOWN);
- }
- return 0;
+ dl_error_ack_t *err_ack = (dl_error_ack_t *) ctl_area;
+
+ if(err_ack->dl_primitive != prim) {
+ printf(_("Error: DLPI stream API failed to get MAC in check_ctrl: %s.\n"),
+ strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+ return 0;
}
/* put a control message on a stream */
-static int put_ctrl(int fd, int len, int pri)
+static int
+put_ctrl(int fd, int len, int pri)
{
- ctl.len = len;
- if(putmsg(fd, &ctl, 0, pri) < 0) {
- printf(_("Error: DLPI stream API failed to get MAC in put_ctrl/putmsg(): %s.\n"), strerror(errno));
- exit(STATE_UNKNOWN);
- }
- return 0;
+ ctl.len = len;
+ if(putmsg(fd, &ctl, 0, pri) < 0) {
+ printf(_("Error: DLPI stream API failed to get MAC in put_ctrl/putmsg(): %s.\n"),
+ strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+
+ return 0;
}
+
/* put a control + data message on a stream */
-static int put_both(int fd, int clen, int dlen, int pri)
+static int
+put_both(int fd, int clen, int dlen, int pri)
{
- ctl.len = clen;
- dat.len = dlen;
- if(putmsg(fd, &ctl, &dat, pri) < 0) {
- printf(_("Error: DLPI stream API failed to get MAC in put_both/putmsg().\n"), strerror(errno));
- exit(STATE_UNKNOWN);
- }
- return 0;
+ ctl.len = clen;
+ dat.len = dlen;
+ if(putmsg(fd, &ctl, &dat, pri) < 0) {
+ printf(_("Error: DLPI stream API failed to get MAC in put_both/putmsg().\n"),
+ strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+
+ return 0;
}
+
/* open file descriptor and attach */
-static int dl_open(const char *dev, int unit, int *fd)
+static int
+dl_open(const char *dev, int unit, int *fd)
{
- dl_attach_req_t *attach_req = (dl_attach_req_t *)ctl_area;
- if((*fd = open(dev, O_RDWR)) == -1) {
- printf(_("Error: DLPI stream API failed to get MAC in dl_attach_req/open(%s..): %s.\n"), dev, strerror(errno));
- exit(STATE_UNKNOWN);
- }
- attach_req->dl_primitive = DL_ATTACH_REQ;
- attach_req->dl_ppa = unit;
- put_ctrl(*fd, sizeof(dl_attach_req_t), 0);
- get_msg(*fd);
- return check_ctrl(DL_OK_ACK);
+ dl_attach_req_t *attach_req = (dl_attach_req_t *) ctl_area;
+
+ if((*fd = open(dev, O_RDWR)) == -1) {
+ printf(_
+ ("Error: DLPI stream API failed to get MAC in dl_attach_req/open(%s..): %s.\n"),
+ dev, strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+ attach_req->dl_primitive = DL_ATTACH_REQ;
+ attach_req->dl_ppa = unit;
+ put_ctrl(*fd, sizeof(dl_attach_req_t), 0);
+ get_msg(*fd);
+ return check_ctrl(DL_OK_ACK);
}
+
/* send DL_BIND_REQ */
-static int dl_bind(int fd, int sap, u_char *addr)
+static int
+dl_bind(int fd, int sap, u_char * addr)
{
- dl_bind_req_t *bind_req = (dl_bind_req_t *)ctl_area;
- dl_bind_ack_t *bind_ack = (dl_bind_ack_t *)ctl_area;
- bind_req->dl_primitive = DL_BIND_REQ;
- bind_req->dl_sap = sap;
- bind_req->dl_max_conind = 1;
- bind_req->dl_service_mode = DL_CLDLS;
- bind_req->dl_conn_mgmt = 0;
- bind_req->dl_xidtest_flg = 0;
- put_ctrl(fd, sizeof(dl_bind_req_t), 0);
- get_msg(fd);
- if (GOT_ERR == check_ctrl(DL_BIND_ACK)) {
- printf(_("Error: DLPI stream API failed to get MAC in dl_bind/check_ctrl(): %s.\n"), strerror(errno));
- exit(STATE_UNKNOWN);
- }
- bcopy((u_char *)bind_ack + bind_ack->dl_addr_offset, addr,
- bind_ack->dl_addr_length);
- return 0;
+ dl_bind_req_t *bind_req = (dl_bind_req_t *) ctl_area;
+ dl_bind_ack_t *bind_ack = (dl_bind_ack_t *) ctl_area;
+
+ bind_req->dl_primitive = DL_BIND_REQ;
+ bind_req->dl_sap = sap;
+ bind_req->dl_max_conind = 1;
+ bind_req->dl_service_mode = DL_CLDLS;
+ bind_req->dl_conn_mgmt = 0;
+ bind_req->dl_xidtest_flg = 0;
+ put_ctrl(fd, sizeof(dl_bind_req_t), 0);
+ get_msg(fd);
+ if(GOT_ERR == check_ctrl(DL_BIND_ACK)) {
+ printf(_
+ ("Error: DLPI stream API failed to get MAC in dl_bind/check_ctrl(): %s.\n"),
+ strerror(errno));
+ exit(STATE_UNKNOWN);
+ }
+ memcpy(addr, (u_char *) bind_ack + bind_ack->dl_addr_offset,
+ bind_ack->dl_addr_length);
+ return 0;
}
+
/***********************************************************************
* interface:
* function mac_addr_dlpi - get the mac address of the interface with
@@ -1197,37 +1229,39 @@
*
* return: 0 if OK, -1 if the address could not be determined
*
- *
***********************************************************************/
-long mac_addr_dlpi( const char *dev, int unit, u_char *addr) {
+long
+mac_addr_dlpi(const char *dev, int unit, u_char * addr)
+{
int fd;
u_char mac_addr[25];
- if (GOT_ERR != dl_open(dev, unit, &fd)) {
- if (GOT_ERR != dl_bind(fd, INSAP, mac_addr)) {
- bcopy( mac_addr, addr, 6);
- return 0;
- }
+ if(GOT_ERR != dl_open(dev, unit, &fd)) {
+ if(GOT_ERR != dl_bind(fd, INSAP, mac_addr)) {
+ memcpy(addr, mac_addr, 6);
+ return 0;
+ }
}
- close(fd);
+ close(fd);
return -1;
}
/* Kompf 2000-2003 */
-
#endif
/* print usage help */
-void print_help(void){
+void
+print_help(void)
+{
- print_revision(progname,revision);
+ print_revision(progname, revision);
printf("Copyright (c) 2001-2004 Ethan Galstad (nagios@nagios.org)\n\n");
- printf (COPYRIGHT, copyright, email);
-
+ printf(COPYRIGHT, copyright, email);
+
printf(_("This plugin tests the availability of DHCP servers on a network.\n\n"));
print_usage();
@@ -1241,6 +1275,8 @@
Seconds to wait for DHCPOFFER before timeout occurs\n\
-i, --interface=STRING\n\
Interface to to use for listening (i.e. eth0)\n\
+ -u, --unicast=INTEGER\n\
+ Unicast testing. Requires -s. Useful for testing servers on remote networks.
-v, --verbose\n\
Print extra information (command-line use only)\n\
-h, --help\n\
@@ -1250,12 +1286,10 @@
}
-void print_usage(void)
+void
+print_usage(void)
{
printf("\
Usage: %s [-s serverip] [-r requestedip] [-t timeout] [-i interface]\n\
- [-v]",progname);
+ [-v]", progname);
}
-
-
-