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-rw-r--r--plugins/check_dhcp.c446
1 files changed, 330 insertions, 116 deletions
diff --git a/plugins/check_dhcp.c b/plugins/check_dhcp.c
index ee893cd2..5c3c199d 100644
--- a/plugins/check_dhcp.c
+++ b/plugins/check_dhcp.c
@@ -45,17 +45,57 @@
#include <arpa/inet.h>
#if defined( __linux__ )
+
#include <linux/if_ether.h>
#include <features.h>
-#else
+
+#elif defined (__bsd__)
+
#include <netinet/if_ether.h>
#include <sys/sysctl.h>
#include <net/if_dl.h>
+
+#elif defined(__sun__) || defined(__solaris__)
+
+#define INSAP 22
+#define OUTSAP 24
+
+#include <signal.h>
+#include <ctype.h>
+#include <sys/stropts.h>
+#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 */
+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};
+
+#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
+#define u_int32_t uint32_t
+
+static int get_msg(int);
+static int check_ctrl(int);
+static int put_ctrl(int, int, int);
+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 *);
+
#endif
const char *progname = "check_dhcp";
-/*#define DEBUG*/
#define HAVE_GETOPT_H
@@ -166,6 +206,7 @@ int requested_responses=0;
int request_specific_address=FALSE;
int received_requested_address=FALSE;
+int verbose=0;
struct in_addr requested_address;
@@ -233,6 +274,9 @@ int main(int argc, char **argv){
/* determines hardware address on client machine */
int get_hardware_address(int sock,char *interface_name){
+
+ int i;
+
#if defined(__linux__)
struct ifreq ifr;
@@ -245,7 +289,9 @@ int get_hardware_address(int sock,char *interface_name){
}
memcpy(&client_hardware_address[0],&ifr.ifr_hwaddr.sa_data,6);
-#else
+
+#elif defined(__bsd__)
+
/* Code from getmac.c posted at http://lists.freebsd.org/pipermail/freebsd-hackers/2004-June/007415.html
* by Alecs King based on Unix Network programming Ch 17
*/
@@ -263,39 +309,76 @@ int get_hardware_address(int sock,char *interface_name){
mib[4] = NET_RT_IFLIST;
if ((mib[5] = if_nametoindex(interface_name)) == 0) {
- perror("if_nametoindex error");
- exit(2);
+ printf("Error: if_nametoindex error - %s.\n", strerror(errno));
+ exit(STATE_UNKNOWN);
}
if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
- perror("sysctl 1 error");
- exit(3);
+ 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) {
- perror("malloc error");
+ 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) {
- perror("sysctl 2 error");
- exit(5);
+ 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) ;
-#endif
+#elif defined(__sun__) || defined(__solaris__)
+
+ /*
+ * Lifted from
+ *
+ * mac_addr_dlpi.c
+ *
+ * Copyright @2000, 2003 Martin Kompf, martin@kompf.de
+ *
+ * Return the MAC (ie, ethernet hardware) address by using the dlpi api.
+ *
+ */
+
+ 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);
+ 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);
+ exit(STATE_UNKNOWN);
+ }
-#ifdef DEBUG
- printf("Hardware address: %02x:%02x:%02x:",client_hardware_address[0],client_hardware_address[1],client_hardware_address[2]);
- printf("%02x:",client_hardware_address[3]);
- printf("%02x:%02x\n",client_hardware_address[4],client_hardware_address[5]);
- printf("\n");
+#else
+ printf("Error: can't get MAC address for this architcture.\n");
+ exit(STATE_UNKNOWN);
#endif
+ if (verbose) {
+ printf( "Hadrware address: ");
+ for (i=0; i<6; ++i)
+ printf("%2.2x", client_hardware_address[i]);
+ printf( "\n");
+ }
+
return OK;
}
@@ -364,21 +447,20 @@ int send_dhcp_discover(int sock){
bzero(&sockaddr_broadcast.sin_zero,sizeof(sockaddr_broadcast.sin_zero));
-#ifdef DEBUG
- 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));
-#endif
+ 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 out */
send_dhcp_packet(&discover_packet,sizeof(discover_packet),sock,&sockaddr_broadcast);
-#ifdef DEBUG
- printf("\n\n");
-#endif
+ if (verbose)
+ printf("\n\n");
return OK;
}
@@ -406,9 +488,8 @@ int get_dhcp_offer(int sock){
if((current_time-start_time)>=dhcpoffer_timeout)
break;
-#ifdef DEBUG
- printf("\n\n");
-#endif
+ if (verbose)
+ printf("\n\n");
bzero(&source,sizeof(source));
bzero(&offer_packet,sizeof(offer_packet));
@@ -417,70 +498,69 @@ int get_dhcp_offer(int sock){
result=receive_dhcp_packet(&offer_packet,sizeof(offer_packet),sock,dhcpoffer_timeout,&source);
if(result!=OK){
-#ifdef DEBUG
- printf("Result=ERROR\n");
-#endif
+ if (verbose)
+ printf("Result=ERROR\n");
+
continue;
}
else{
-#ifdef DEBUG
- printf("Result=OK\n");
-#endif
+ if (verbose)
+ printf("Result=OK\n");
+
responses++;
}
-#ifdef DEBUG
- 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));
-#endif
+ 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));
+ }
/* 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){
-#ifdef DEBUG
- printf("DHCPOFFER XID (%lu) did not match DHCPDISCOVER XID (%lu) - ignoring packet\n",ntohl(offer_packet.xid),packet_xid);
-#endif
+ if (verbose)
+ printf("DHCPOFFER XID (%lu) did not match DHCPDISCOVER XID (%lu) - ignoring packet\n",ntohl(offer_packet.xid),packet_xid);
+
continue;
}
/* check hardware address */
result=OK;
-#ifdef DEBUG
- printf("DHCPOFFER chaddr: ");
-#endif
+ if (verbose)
+ printf("DHCPOFFER chaddr: ");
+
for(x=0;x<ETHERNET_HARDWARE_ADDRESS_LENGTH;x++){
-#ifdef DEBUG
- printf("%02X",(unsigned char)offer_packet.chaddr[x]);
-#endif
- if(offer_packet.chaddr[x]!=client_hardware_address[x]){
+ if (verbose)
+ printf("%02X",(unsigned char)offer_packet.chaddr[x]);
+
+ if(offer_packet.chaddr[x]!=client_hardware_address[x])
result=ERROR;
- }
- }
-#ifdef DEBUG
- printf("\n");
-#endif
+ }
+ if (verbose)
+ printf("\n");
+
if(result==ERROR){
-#ifdef DEBUG
- printf("DHCPOFFER hardware address did not match our own - ignoring packet\n");
-#endif
+ if (verbose)
+ printf("DHCPOFFER hardware address did not match our own - ignoring packet\n");
+
continue;
}
-#ifdef DEBUG
- 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));
-#endif
+ 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);
valid_responses++;
}
-#ifdef DEBUG
- printf("Total responses seen on the wire: %d\n",responses);
- printf("Valid responses for this machine: %d\n",valid_responses);
-#endif
+ if (verbose) {
+ printf("Total responses seen on the wire: %d\n",responses);
+ printf("Valid responses for this machine: %d\n",valid_responses);
+ }
return OK;
}
@@ -494,9 +574,8 @@ int send_dhcp_packet(void *buffer, int buffer_size, int sock, struct sockaddr_in
result=sendto(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)dest,sizeof(*dest));
-#ifdef DEBUG
- printf("send_dhcp_packet result: %d\n",result);
-#endif
+ if (verbose)
+ printf("send_dhcp_packet result: %d\n",result);
if(result<0)
return ERROR;
@@ -524,9 +603,8 @@ int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, st
/* make sure some data has arrived */
if(!FD_ISSET(sock,&readfds)){
-#ifdef DEBUG
- printf("No (more) data received\n");
-#endif
+ if (verbose)
+ printf("No (more) data received\n");
return ERROR;
}
@@ -537,26 +615,24 @@ int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, st
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);
-#ifdef DEBUG
- printf("recv_result_1: %d\n",recv_result);
-#endif
+ 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);
-#ifdef DEBUG
- printf("recv_result_2: %d\n",recv_result);
-#endif
+ if (verbose)
+ printf("recv_result_2: %d\n",recv_result);
if(recv_result==-1){
-#ifdef DEBUG
- printf("recvfrom() failed, ");
- printf("errno: (%d) -> %s\n",errno,strerror(errno));
-#endif
+ if (verbose) {
+ printf("recvfrom() failed, ");
+ printf("errno: (%d) -> %s\n",errno,strerror(errno));
+ }
return ERROR;
}
else{
-#ifdef DEBUG
- printf("receive_dhcp_packet() result: %d\n",recv_result);
- printf("receive_dhcp_packet() source: %s\n",inet_ntoa(source_address.sin_addr));
-#endif
+ 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;
@@ -589,9 +665,8 @@ int create_dhcp_socket(void){
exit(STATE_UNKNOWN);
}
-#ifdef DEBUG
- printf("DHCP socket: %d\n",sock);
-#endif
+ if (verbose)
+ printf("DHCP socket: %d\n",sock);
/* set the reuse address flag so we don't get errors when restarting */
flag=1;
@@ -657,9 +732,8 @@ int add_requested_server(struct in_addr server_address){
requested_servers++;
-#ifdef DEBUG
- printf("Requested server address: %s\n",inet_ntoa(new_server->server_address));
-#endif
+ if (verbose)
+ printf("Requested server address: %s\n",inet_ntoa(new_server->server_address));
return OK;
}
@@ -691,9 +765,8 @@ int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
/* get option length */
option_length=offer_packet->options[x++];
-#ifdef DEBUG
- printf("Option: %d (0x%02X)\n",option_type,option_length);
-#endif
+ if (verbose)
+ printf("Option: %d (0x%02X)\n",option_type,option_length);
/* get option data */
if(option_type==DHCP_OPTION_LEASE_TIME)
@@ -708,19 +781,19 @@ int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
for(y=0;y<option_length;y++,x++);
}
-#ifdef DEBUG
- 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("Renewal Time: Infinite\n");
- else
- 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);
-#endif
+ 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("Renewal Time: Infinite\n");
+ else
+ 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);
+ }
new_offer=(dhcp_offer *)malloc(sizeof(dhcp_offer));
@@ -735,10 +808,10 @@ int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
new_offer->rebinding_time=dhcp_rebinding_time;
-#ifdef DEBUG
- printf("Added offer from server @ %s",inet_ntoa(new_offer->server_address));
- printf(" of IP address %s\n",inet_ntoa(new_offer->offered_address));
-#endif
+ 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;
@@ -807,10 +880,10 @@ int get_results(void){
/* 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))){
-#ifdef DEBUG
+ if (verbose) {
printf("DHCP Server Match: Offerer=%s",inet_ntoa(temp_offer->server_address));
printf(" Requested=%s\n",inet_ntoa(temp_server->server_address));
-#endif
+ }
requested_responses++;
}
}
@@ -1039,6 +1112,11 @@ int call_getopt(int argc, char **argv){
print_help();
exit(STATE_OK);
+ case 'v': /* verbose */
+
+ verbose=1;
+ break;
+
case '?': /* help */
/*usage("Invalid argument\n");*/
@@ -1059,3 +1137,139 @@ int validate_arguments(void){
return OK;
}
+#if defined(__sun__) || defined(__solaris__)
+
+
+/*
+ * Copyright @2000, 2003 Martin Kompf, martin@kompf.de
+ *
+ * Nagios plugins thanks Martin for this code.
+ */
+
+/* get a message from a stream; return type of message */
+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);
+}
+
+/* verify that dl_primitive in ctl_area = 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;
+}
+
+/* put a control message on a stream */
+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;
+}
+
+/* put a control + data message on a stream */
+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;
+}
+
+/* open file descriptor and attach */
+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);
+}
+
+/* send DL_BIND_REQ */
+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;
+}
+
+/***********************************************************************
+ * interface:
+ * function mac_addr_dlpi - get the mac address of the interface with
+ * type dev (eg lnc, hme) and unit (0, 1 ..)
+ *
+ * parameter: addr: an array of six bytes, has to be allocated by the caller
+ *
+ * return: 0 if OK, -1 if the address could not be determined
+ *
+ *
+ ***********************************************************************/
+
+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;
+ }
+ }
+ close(fd);
+ return -1;
+}
+
+#endif
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 07:12:11 +0000