[monitoring-plugins] check_dhcp: clang-format
RincewindsHat
git at monitoring-plugins.org
Tue Oct 15 23:30:12 CEST 2024
Module: monitoring-plugins
Branch: master
Commit: 3934457c2a531b86d8dd7ceeebf4e0fbb7c83387
Author: RincewindsHat <12514511+RincewindsHat at users.noreply.github.com>
Date: Tue Oct 15 16:00:07 2024 +0200
URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=3934457
check_dhcp: clang-format
---
plugins-root/check_dhcp.c | 1149 +++++++++++++++++++++------------------------
1 file changed, 548 insertions(+), 601 deletions(-)
diff --git a/plugins-root/check_dhcp.c b/plugins-root/check_dhcp.c
index 4b8f5e2..4f50a5c 100644
--- a/plugins-root/check_dhcp.c
+++ b/plugins-root/check_dhcp.c
@@ -59,45 +59,45 @@ const char *email = "devel at monitoring-plugins.org";
#include <arpa/inet.h>
#if HAVE_SYS_SOCKIO_H
-#include <sys/sockio.h>
+# include <sys/sockio.h>
#endif // HAVE_SYS_SOCKIO_H
-#if defined( __linux__ )
+#if defined(__linux__)
-#include <linux/if_ether.h>
-#include <features.h>
+# include <linux/if_ether.h>
+# include <features.h>
-#elif defined (__bsd__)
+#elif defined(__bsd__)
-#include <netinet/if_ether.h>
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <net/if_dl.h>
+# include <netinet/if_ether.h>
+# include <sys/param.h>
+# include <sys/sysctl.h>
+# include <net/if_dl.h>
#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>
-#include <sys/stropts.h>
-#include <sys/poll.h>
-#include <sys/dlpi.h>
+# 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 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};
-#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
static int get_msg(int);
static int check_ctrl(int);
@@ -105,178 +105,168 @@ 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 *);
+long mac_addr_dlpi(const char *, int, u_char *);
#endif // __sun__ || __solaris__ || __hpux
-
-
/**** Common definitions ****/
-#define OK 0
-#define ERROR -1
-
+#define OK 0
+#define ERROR -1
/**** DHCP definitions ****/
-#define MAX_DHCP_CHADDR_LENGTH 16
-#define MAX_DHCP_SNAME_LENGTH 64
-#define MAX_DHCP_FILE_LENGTH 128
-#define MAX_DHCP_OPTIONS_LENGTH 312
-
-
-typedef struct dhcp_packet_struct{
- uint8_t op; /* packet type */
- uint8_t htype; /* type of hardware address for this machine (Ethernet, etc) */
- uint8_t hlen; /* length of hardware address (of this machine) */
- uint8_t hops; /* hops */
- uint32_t xid; /* random transaction id number - chosen by this machine */
- uint16_t secs; /* seconds used in timing */
- uint16_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 next 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 */
+#define MAX_DHCP_CHADDR_LENGTH 16
+#define MAX_DHCP_SNAME_LENGTH 64
+#define MAX_DHCP_FILE_LENGTH 128
+#define MAX_DHCP_OPTIONS_LENGTH 312
+
+typedef struct dhcp_packet_struct {
+ uint8_t op; /* packet type */
+ uint8_t htype; /* type of hardware address for this machine (Ethernet, etc) */
+ uint8_t hlen; /* length of hardware address (of this machine) */
+ uint8_t hops; /* hops */
+ uint32_t xid; /* random transaction id number - chosen by this machine */
+ uint16_t secs; /* seconds used in timing */
+ uint16_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 next 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 */
uint32_t lease_time; /* lease time in seconds */
uint32_t renewal_time; /* renewal time in seconds */
uint32_t rebinding_time; /* rebinding time in seconds */
- bool desired; /* is this offer desired (necessary in exclusive mode) */
+ bool desired; /* is this offer desired (necessary in exclusive mode) */
struct dhcp_offer_struct *next;
-}dhcp_offer;
-
+} dhcp_offer;
-typedef struct requested_server_struct{
+typedef struct requested_server_struct {
struct in_addr server_address;
bool answered;
struct requested_server_struct *next;
-}requested_server;
-
-
-#define BOOTREQUEST 1
-#define BOOTREPLY 2
-
-#define DHCPDISCOVER 1
-#define DHCPOFFER 2
-#define DHCPREQUEST 3
-#define DHCPDECLINE 4
-#define DHCPACK 5
-#define DHCPNACK 6
-#define DHCPRELEASE 7
-
-#define DHCP_OPTION_MESSAGE_TYPE 53
-#define DHCP_OPTION_HOST_NAME 12
-#define DHCP_OPTION_BROADCAST_ADDRESS 28
-#define DHCP_OPTION_REQUESTED_ADDRESS 50
-#define DHCP_OPTION_LEASE_TIME 51
-#define DHCP_OPTION_SERVER_IDENTIFIER 54
-#define DHCP_OPTION_RENEWAL_TIME 58
-#define DHCP_OPTION_REBINDING_TIME 59
-#define DHCP_OPTION_END 255
-
-#define DHCP_INFINITE_TIME 0xFFFFFFFF
+} requested_server;
+
+#define BOOTREQUEST 1
+#define BOOTREPLY 2
+
+#define DHCPDISCOVER 1
+#define DHCPOFFER 2
+#define DHCPREQUEST 3
+#define DHCPDECLINE 4
+#define DHCPACK 5
+#define DHCPNACK 6
+#define DHCPRELEASE 7
+
+#define DHCP_OPTION_MESSAGE_TYPE 53
+#define DHCP_OPTION_HOST_NAME 12
+#define DHCP_OPTION_BROADCAST_ADDRESS 28
+#define DHCP_OPTION_REQUESTED_ADDRESS 50
+#define DHCP_OPTION_LEASE_TIME 51
+#define DHCP_OPTION_SERVER_IDENTIFIER 54
+#define DHCP_OPTION_RENEWAL_TIME 58
+#define DHCP_OPTION_REBINDING_TIME 59
+#define DHCP_OPTION_END 255
+
+#define DHCP_INFINITE_TIME 0xFFFFFFFF
#define DHCP_BROADCAST_FLAG 32768
-#define DHCP_SERVER_PORT 67
-#define DHCP_CLIENT_PORT 68
+#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 ETHERNET_HARDWARE_ADDRESS 1 /* used in htype field of dhcp packet */
+#define ETHERNET_HARDWARE_ADDRESS_LENGTH 6 /* length of Ethernet hardware addresses */
-bool unicast = false; /* unicast mode: mimic a DHCP relay */
-bool exclusive = false; /* exclusive mode aka "rogue DHCP server detection" */
-struct in_addr my_ip; /* our address (required for relay) */
-struct in_addr dhcp_ip; /* server to query (if in unicast mode) */
-unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH]="";
-unsigned char *user_specified_mac=NULL;
+bool unicast = false; /* unicast mode: mimic a DHCP relay */
+bool exclusive = false; /* exclusive mode aka "rogue DHCP server detection" */
+struct in_addr my_ip; /* our address (required for relay) */
+struct in_addr dhcp_ip; /* server to query (if in unicast mode) */
+unsigned char client_hardware_address[MAX_DHCP_CHADDR_LENGTH] = "";
+unsigned char *user_specified_mac = NULL;
-char network_interface_name[IFNAMSIZ]="eth0";
+char network_interface_name[IFNAMSIZ] = "eth0";
-uint32_t packet_xid=0;
+uint32_t packet_xid = 0;
-uint32_t dhcp_lease_time=0;
-uint32_t dhcp_renewal_time=0;
-uint32_t dhcp_rebinding_time=0;
+uint32_t dhcp_lease_time = 0;
+uint32_t dhcp_renewal_time = 0;
+uint32_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;
-bool request_specific_address=false;
-bool received_requested_address=false;
-int verbose=0;
+bool request_specific_address = false;
+bool received_requested_address = false;
+int verbose = 0;
struct in_addr requested_address;
-
int process_arguments(int, char **);
int call_getopt(int, char **);
int validate_arguments(int);
void print_usage(void);
void print_help(void);
-void resolve_host(const char *in,struct in_addr *out);
+void resolve_host(const char *in, struct in_addr *out);
unsigned char *mac_aton(const char *);
void print_hardware_address(const unsigned char *);
-int get_hardware_address(int,char *);
-int get_ip_address(int,char *);
+int get_hardware_address(int, char *);
+int get_ip_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 = STATE_UNKNOWN;
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
/* Parse extra opts if any */
- argv=np_extra_opts(&argc, argv, progname);
+ argv = np_extra_opts(&argc, argv, progname);
- if(process_arguments(argc,argv)!=OK){
- usage4 (_("Could not parse arguments"));
+ 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 */
- if(user_specified_mac!=NULL)
- memcpy(client_hardware_address,user_specified_mac,6);
+ if (user_specified_mac != NULL)
+ memcpy(client_hardware_address, user_specified_mac, 6);
else
- get_hardware_address(dhcp_socket,network_interface_name);
+ get_hardware_address(dhcp_socket, network_interface_name);
- if(unicast) /* get IP address of client machine */
- get_ip_address(dhcp_socket,network_interface_name);
+ if (unicast) /* get IP address of client machine */
+ get_ip_address(dhcp_socket, network_interface_name);
/* send DHCPDISCOVER packet */
send_dhcp_discover(dhcp_socket);
@@ -288,7 +278,7 @@ int main(int argc, char **argv){
close_dhcp_socket(dhcp_socket);
/* determine state/plugin output to return */
- result=get_results();
+ result = get_results();
/* free allocated memory */
free_dhcp_offer_list();
@@ -297,34 +287,32 @@ int main(int argc, char **argv){
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) {
#if defined(__linux__)
struct ifreq ifr;
- strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name)-1);
- ifr.ifr_name[sizeof(ifr.ifr_name)-1]='\0';
+ 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){
- 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);
+ memcpy(&client_hardware_address[0], &ifr.ifr_hwaddr.sa_data, 6);
#elif defined(__bsd__)
/* King 2004 see ACKNOWLEDGEMENTS */
- size_t len;
- int mib[6];
- char *buf;
- unsigned char *ptr;
- struct if_msghdr *ifm;
- struct sockaddr_dl *sdl;
+ size_t len;
+ int mib[6];
+ char *buf;
+ unsigned char *ptr;
+ struct if_msghdr *ifm;
+ struct sockaddr_dl *sdl;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
@@ -332,22 +320,22 @@ int get_hardware_address(int sock,char *interface_name){
mib[3] = AF_LINK;
mib[4] = NET_RT_IFLIST;
- if((mib[5] = if_nametoindex(interface_name)) == 0){
+ 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){
+ 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){
+ 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){
+ 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);
}
@@ -355,7 +343,7 @@ int get_hardware_address(int sock,char *interface_name){
ifm = (struct if_msghdr *)buf;
sdl = (struct sockaddr_dl *)(ifm + 1);
ptr = (unsigned char *)LLADDR(sdl);
- memcpy(&client_hardware_address[0], ptr, 6) ;
+ memcpy(&client_hardware_address[0], ptr, 6);
/* King 2004 */
#elif defined(__sun__) || defined(__solaris__)
@@ -368,22 +356,21 @@ int get_hardware_address(int sock,char *interface_name){
/* get last number from interfacename, eg lnc0, e1000g0*/
int i;
- p = interface_name + strlen(interface_name) -1;
- for(i = strlen(interface_name) -1; i > 0; p--) {
- if(isalpha(*p))
+ p = interface_name + strlen(interface_name) - 1;
+ for (i = strlen(interface_name) - 1; i > 0; p--) {
+ if (isalpha(*p))
break;
}
p++;
- if( p != interface_name ){
- unit = atoi(p) ;
- strncat(dev, interface_name, 6) ;
- }
- else{
+ if (p != interface_name) {
+ unit = atoi(p);
+ 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){
+ 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);
}
@@ -391,11 +378,11 @@ int get_hardware_address(int sock,char *interface_name){
#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){
+ 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);
}
@@ -406,68 +393,65 @@ int get_hardware_address(int sock,char *interface_name){
exit(STATE_UNKNOWN);
#endif
- if(verbose)
+ if (verbose)
print_hardware_address(client_hardware_address);
return OK;
}
/* determines IP address of the client interface */
-int get_ip_address(int sock,char *interface_name){
+int get_ip_address(int sock, char *interface_name) {
#if defined(SIOCGIFADDR)
struct ifreq ifr;
- strncpy((char *)&ifr.ifr_name,interface_name,sizeof(ifr.ifr_name)-1);
- ifr.ifr_name[sizeof(ifr.ifr_name)-1]='\0';
+ strncpy((char *)&ifr.ifr_name, interface_name, sizeof(ifr.ifr_name) - 1);
+ ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0';
- if(ioctl(sock,SIOCGIFADDR,&ifr)<0){
- printf(_("Error: Cannot determine IP address of interface %s\n"),
- interface_name);
+ if (ioctl(sock, SIOCGIFADDR, &ifr) < 0) {
+ printf(_("Error: Cannot determine IP address of interface %s\n"), interface_name);
exit(STATE_UNKNOWN);
}
- my_ip=((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
+ my_ip = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
#else
printf(_("Error: Cannot get interface IP address on this platform.\n"));
exit(STATE_UNKNOWN);
#endif
- if(verbose)
- printf(_("Pretending to be relay client %s\n"),inet_ntoa(my_ip));
+ if (verbose)
+ printf(_("Pretending to be relay client %s\n"), inet_ntoa(my_ip));
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;
unsigned short opts;
-
/* clear the packet data structure */
- bzero(&discover_packet,sizeof(discover_packet));
-
+ bzero(&discover_packet, 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 = ETHERNET_HARDWARE_ADDRESS;
/* length of our hardware address */
- discover_packet.hlen=ETHERNET_HARDWARE_ADDRESS_LENGTH;
+ discover_packet.hlen = ETHERNET_HARDWARE_ADDRESS_LENGTH;
/*
* transaction ID is supposed to be random.
*/
- srand(time(NULL)^getpid());
- packet_xid=random();
- discover_packet.xid=htonl(packet_xid);
+ srand(time(NULL) ^ getpid());
+ packet_xid = random();
+ discover_packet.xid = htonl(packet_xid);
/*discover_packet.secs=htons(65535);*/
- discover_packet.secs=0xFF;
+ discover_packet.secs = 0xFF;
/*
* server needs to know if it should broadcast or unicast its response:
@@ -476,71 +460,67 @@ int send_dhcp_discover(int sock){
discover_packet.flags = unicast ? 0 : htons(DHCP_BROADCAST_FLAG);
/* our hardware address */
- memcpy(discover_packet.chaddr,client_hardware_address,ETHERNET_HARDWARE_ADDRESS_LENGTH);
+ memcpy(discover_packet.chaddr, client_hardware_address, ETHERNET_HARDWARE_ADDRESS_LENGTH);
/* 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';
opts = 4;
/* DHCP message type is embedded in options field */
- discover_packet.options[opts++]=DHCP_OPTION_MESSAGE_TYPE; /* DHCP message type option identifier */
- discover_packet.options[opts++]='\x01'; /* DHCP message option length in bytes */
- discover_packet.options[opts++]=DHCPDISCOVER;
+ discover_packet.options[opts++] = DHCP_OPTION_MESSAGE_TYPE; /* DHCP message type option identifier */
+ discover_packet.options[opts++] = '\x01'; /* DHCP message option length in bytes */
+ discover_packet.options[opts++] = DHCPDISCOVER;
/* the IP address we're requesting */
- if(request_specific_address){
- discover_packet.options[opts++]=DHCP_OPTION_REQUESTED_ADDRESS;
- discover_packet.options[opts++]='\x04';
- memcpy(&discover_packet.options[opts],&requested_address,sizeof(requested_address));
+ if (request_specific_address) {
+ discover_packet.options[opts++] = DHCP_OPTION_REQUESTED_ADDRESS;
+ discover_packet.options[opts++] = '\x04';
+ memcpy(&discover_packet.options[opts], &requested_address, sizeof(requested_address));
opts += sizeof(requested_address);
}
- discover_packet.options[opts++]= (char)DHCP_OPTION_END;
+ discover_packet.options[opts++] = (char)DHCP_OPTION_END;
/* unicast fields */
- if(unicast)
+ if (unicast)
discover_packet.giaddr.s_addr = my_ip.s_addr;
/* see RFC 1542, 4.1.1 */
discover_packet.hops = unicast ? 1 : 0;
/* send the DHCPDISCOVER packet to broadcast address */
- sockaddr_broadcast.sin_family=AF_INET;
- sockaddr_broadcast.sin_port=htons(DHCP_SERVER_PORT);
+ sockaddr_broadcast.sin_family = AF_INET;
+ sockaddr_broadcast.sin_port = htons(DHCP_SERVER_PORT);
sockaddr_broadcast.sin_addr.s_addr = unicast ? dhcp_ip.s_addr : INADDR_BROADCAST;
- bzero(&sockaddr_broadcast.sin_zero,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));
+ bzero(&sockaddr_broadcast.sin_zero, 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)
+ 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;
struct sockaddr_in via;
- int result=OK;
- int responses=0;
+ int result = OK;
+ int responses = 0;
int x;
time_t start_time;
time_t current_time;
@@ -548,30 +528,29 @@ int get_dhcp_offer(int sock){
time(&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 - start_time) >= dhcpoffer_timeout)
break;
- if(verbose)
+ if (verbose)
printf("\n\n");
- bzero(&source,sizeof(source));
- bzero(&via,sizeof(via));
- bzero(&offer_packet,sizeof(offer_packet));
+ bzero(&source, sizeof(source));
+ bzero(&via, sizeof(via));
+ bzero(&offer_packet, sizeof(offer_packet));
- result=OK;
- result=receive_dhcp_packet(&offer_packet,sizeof(offer_packet),sock,dhcpoffer_timeout,&source);
+ result = OK;
+ result = receive_dhcp_packet(&offer_packet, sizeof(offer_packet), sock, dhcpoffer_timeout, &source);
- if(result!=OK){
- if(verbose)
+ if (result != OK) {
+ if (verbose)
printf(_("Result=ERROR\n"));
continue;
- }
- else{
- if(verbose)
+ } else {
+ if (verbose)
printf(_("Result=OK\n"));
responses++;
@@ -579,85 +558,81 @@ int get_dhcp_offer(int sock){
/* The "source" is either a server or a relay. */
/* Save a copy of "source" into "via" even if it's via itself */
- memcpy(&via,&source,sizeof(source)) ;
+ memcpy(&via, &source, sizeof(source));
- if(verbose){
- printf(_("DHCPOFFER from IP address %s"),inet_ntoa(source.sin_addr));
- printf(_(" via %s\n"),inet_ntoa(via.sin_addr));
- printf("DHCPOFFER XID: %u (0x%X)\n",ntohl(offer_packet.xid),ntohl(offer_packet.xid));
+ if (verbose) {
+ printf(_("DHCPOFFER from IP address %s"), inet_ntoa(source.sin_addr));
+ printf(_(" via %s\n"), inet_ntoa(via.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 (%u) did not match DHCPDISCOVER XID (%u) - 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)
+ 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]);
+ for (x = 0; x < ETHERNET_HARDWARE_ADDRESS_LENGTH; x++) {
+ if (verbose)
+ printf("%02X", (unsigned char)offer_packet.chaddr[x]);
- if(offer_packet.chaddr[x]!=client_hardware_address[x])
- result=ERROR;
+ if (offer_packet.chaddr[x] != client_hardware_address[x])
+ result = ERROR;
}
- if(verbose)
+ 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){
+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)
+ 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){
+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;
@@ -666,44 +641,42 @@ int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, st
struct sockaddr_in source_address;
int nfound;
-
/* wait for data to arrive (up time timeout) */
- tv.tv_sec=timeout;
- tv.tv_usec=0;
+ 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);
+ 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)
+ if (!FD_ISSET(sock, &readfds)) {
+ if (verbose)
printf(_("No (more) data received (nfound: %d)\n"), nfound);
return ERROR;
}
- else{
- bzero(&source_address,sizeof(source_address));
- address_size=sizeof(source_address);
- recv_result=recvfrom(sock,(char *)buffer,buffer_size,0,(struct sockaddr *)&source_address,&address_size);
- if(verbose)
- printf("recv_result: %d\n",recv_result);
+ else {
+ bzero(&source_address, sizeof(source_address));
+ address_size = sizeof(source_address);
+ recv_result = recvfrom(sock, (char *)buffer, buffer_size, 0, (struct sockaddr *)&source_address, &address_size);
+ if (verbose)
+ printf("recv_result: %d\n", recv_result);
- if(recv_result==-1){
- if(verbose){
+ if (recv_result == -1) {
+ if (verbose) {
printf(_("recvfrom() failed, "));
- printf("errno: (%d) -> %s\n",errno,strerror(errno));
+ 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));
+ } 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));
}
- memcpy(address,&source_address,sizeof(source_address));
+ memcpy(address, &source_address, sizeof(source_address));
return OK;
}
}
@@ -711,172 +684,166 @@ int receive_dhcp_packet(void *buffer, int buffer_size, int sock, int timeout, st
return OK;
}
-
/* creates a socket for DHCP communication */
-int create_dhcp_socket(void){
+int create_dhcp_socket(void) {
struct sockaddr_in myname;
struct ifreq interface;
int sock;
- int flag=1;
+ int flag = 1;
/* Set up the address we're going to bind to. */
- bzero(&myname,sizeof(myname));
- myname.sin_family=AF_INET;
+ bzero(&myname, sizeof(myname));
+ myname.sin_family = AF_INET;
/* listen to DHCP server port if we're in unicast mode */
myname.sin_port = htons(unicast ? DHCP_SERVER_PORT : DHCP_CLIENT_PORT);
myname.sin_addr.s_addr = unicast ? my_ip.s_addr : INADDR_ANY;
- bzero(&myname.sin_zero,sizeof(myname.sin_zero));
+ 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){
+ 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);
+ 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){
+ 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(!unicast && setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char *)&flag,sizeof flag)<0){
+ if (!unicast && 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-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);
+ 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-1);
- interface.ifr_name[IFNAMSIZ-1]='\0';
+ strncpy(interface.ifr_name, network_interface_name, IFNAMSIZ - 1);
+ interface.ifr_name[IFNAMSIZ - 1] = '\0';
#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);
+ 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){
+int close_dhcp_socket(int sock) {
close(sock);
return OK;
}
-
/* adds a requested server address to list in memory */
-int add_requested_server(struct in_addr server_address){
+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->answered=false;
+ new_server->server_address = server_address;
+ new_server->answered = false;
- 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;
unsigned option_type;
unsigned option_length;
struct in_addr serv_ident = {0};
- if(offer_packet==NULL)
+ if (offer_packet == NULL)
return ERROR;
/* process all DHCP options present in the packet */
- for(x=4;x<MAX_DHCP_OPTIONS_LENGTH-1;){
+ for (x = 4; x < MAX_DHCP_OPTIONS_LENGTH - 1;) {
- if((int)offer_packet->options[x]==-1)
+ if ((int)offer_packet->options[x] == -1)
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 */
- switch(option_type){
- case DHCP_OPTION_LEASE_TIME:
- memcpy(&dhcp_lease_time, &offer_packet->options[x],sizeof(dhcp_lease_time));
- dhcp_lease_time = ntohl(dhcp_lease_time);
- break;
- case DHCP_OPTION_RENEWAL_TIME:
- memcpy(&dhcp_renewal_time, &offer_packet->options[x],sizeof(dhcp_renewal_time));
- dhcp_renewal_time = ntohl(dhcp_renewal_time);
- break;
- case DHCP_OPTION_REBINDING_TIME:
- memcpy(&dhcp_rebinding_time, &offer_packet->options[x],sizeof(dhcp_rebinding_time));
- dhcp_rebinding_time = ntohl(dhcp_rebinding_time);
- break;
- case DHCP_OPTION_SERVER_IDENTIFIER:
- memcpy(&serv_ident.s_addr, &offer_packet->options[x],sizeof(serv_ident.s_addr));
- break;
+ switch (option_type) {
+ case DHCP_OPTION_LEASE_TIME:
+ memcpy(&dhcp_lease_time, &offer_packet->options[x], sizeof(dhcp_lease_time));
+ dhcp_lease_time = ntohl(dhcp_lease_time);
+ break;
+ case DHCP_OPTION_RENEWAL_TIME:
+ memcpy(&dhcp_renewal_time, &offer_packet->options[x], sizeof(dhcp_renewal_time));
+ dhcp_renewal_time = ntohl(dhcp_renewal_time);
+ break;
+ case DHCP_OPTION_REBINDING_TIME:
+ memcpy(&dhcp_rebinding_time, &offer_packet->options[x], sizeof(dhcp_rebinding_time));
+ dhcp_rebinding_time = ntohl(dhcp_rebinding_time);
+ break;
+ case DHCP_OPTION_SERVER_IDENTIFIER:
+ memcpy(&serv_ident.s_addr, &offer_packet->options[x], sizeof(serv_ident.s_addr));
+ break;
}
/* skip option data we're ignoring */
- if(option_type==0) /* "pad" option, see RFC 2132 (3.1) */
- x+=1;
+ if (option_type == 0) /* "pad" option, see RFC 2132 (3.1) */
+ x += 1;
else
- x+=option_length;
+ x += option_length;
}
- 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)
+ if (new_offer == NULL)
return ERROR;
/*
@@ -891,298 +858,286 @@ int add_dhcp_offer(struct in_addr source,dhcp_packet *offer_packet){
* DHCPOFFER from. If 'serv_ident' isn't available for some reason, we
* use 'source'.
*/
- new_offer->server_address=serv_ident.s_addr?serv_ident: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->desired=false; /* exclusive mode: we'll check that in get_results */
-
-
- 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));
+ new_offer->server_address = serv_ident.s_addr ? serv_ident : 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->desired = false; /* exclusive mode: we'll check that in get_results */
+
+ 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){
- dhcp_offer *temp_offer, *undesired_offer=NULL;
+int get_results(void) {
+ dhcp_offer *temp_offer, *undesired_offer = NULL;
requested_server *temp_server;
int result;
- uint32_t max_lease_time=0;
+ uint32_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"),inet_ntoa(temp_server->server_address));
- if(temp_server->answered)
+ 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"), inet_ntoa(temp_server->server_address));
+ if (temp_server->answered)
printf(_(" (duplicate)"));
printf(_("\n"));
}
- if(!temp_server->answered){
+ if (!temp_server->answered) {
requested_responses++;
- temp_server->answered=true;
- temp_offer->desired=true;
+ temp_server->answered = true;
+ temp_offer->desired = true;
}
}
}
}
/* exclusive mode: check for undesired offers */
- 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) {
if (!temp_offer->desired) {
- undesired_offer=temp_offer; /* Checks only for the first undesired offer */
- break; /* no further checks needed */
+ undesired_offer = temp_offer; /* Checks only for the first undesired offer */
+ break; /* no further checks needed */
}
}
}
/* else check and see if we got our requested address from any server */
- else{
+ else {
- 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;
}
}
- 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 && !received_requested_address)
- result=STATE_WARNING;
+ 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 && !received_requested_address)
+ result = STATE_WARNING;
- if(exclusive && undesired_offer)
- result=STATE_CRITICAL;
+ if (exclusive && undesired_offer)
+ result = STATE_CRITICAL;
- if(result==0) /* garrett honeycutt 2005 */
+ if (result == 0) /* garrett honeycutt 2005 */
printf("OK: ");
- else if(result==1)
+ else if (result == 1)
printf("WARNING: ");
- else if(result==2)
+ else if (result == 2)
printf("CRITICAL: ");
- else if(result==3)
+ else if (result == 3)
printf("UNKNOWN: ");
/* 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);
-
+ printf(_("Received %d DHCPOFFER(s)"), valid_responses);
- if(exclusive && undesired_offer){
- printf(_(", Rogue DHCP Server detected! Server %s"),inet_ntoa(undesired_offer->server_address));
- printf(_(" offered %s \n"),inet_ntoa(undesired_offer->offered_address));
+ if (exclusive && undesired_offer) {
+ printf(_(", Rogue DHCP Server detected! Server %s"), inet_ntoa(undesired_offer->server_address));
+ printf(_(" offered %s \n"), inet_ntoa(undesired_offer->offered_address));
return result;
}
- 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 (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)
- printf(_(", requested address (%s) was %soffered"),inet_ntoa(requested_address),(received_requested_address)?"":_("not "));
+ if (request_specific_address)
+ printf(_(", requested address (%s) was %soffered"), inet_ntoa(requested_address), (received_requested_address) ? "" : _("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");
return result;
}
-
/* process command-line arguments */
-int process_arguments(int argc, char **argv){
- if(argc<1)
+int process_arguments(int argc, char **argv) {
+ if (argc < 1)
return ERROR;
- call_getopt(argc,argv);
+ call_getopt(argc, argv);
return validate_arguments(argc);
}
-
-
-int call_getopt(int argc, char **argv){
+int call_getopt(int argc, char **argv) {
extern int optind;
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'},
- {"mac", required_argument,0,'m'},
- {"unicast", no_argument, 0,'u'},
- {"exclusive", no_argument, 0,'x'},
- {"verbose", no_argument, 0,'v'},
- {"version", no_argument, 0,'V'},
- {"help", no_argument, 0,'h'},
- {0,0,0,0}
- };
-
- int c=0;
- while(true){
- c=getopt_long(argc,argv,"+hVvxt:s:r:t:i:m:u",long_options,&option_index);
-
- if(c==-1||c==EOF||c==1)
+ 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'},
+ {"mac", required_argument, 0, 'm'},
+ {"unicast", no_argument, 0, 'u'},
+ {"exclusive", no_argument, 0, 'x'},
+ {"verbose", no_argument, 0, 'v'},
+ {"version", no_argument, 0, 'V'},
+ {"help", no_argument, 0, 'h'},
+ {0, 0, 0, 0}};
+
+ int c = 0;
+ while (true) {
+ c = getopt_long(argc, argv, "+hVvxt:s:r:t:i:m:u", long_options, &option_index);
+
+ if (c == -1 || c == EOF || c == 1)
break;
- switch(c){
-
- case 's': /* DHCP server address */
- resolve_host(optarg,&dhcp_ip);
- add_requested_server(dhcp_ip);
- break;
+ switch (c) {
- case 'r': /* address we are requested from DHCP servers */
- resolve_host(optarg,&requested_address);
- request_specific_address=true;
- break;
+ case 's': /* DHCP server address */
+ resolve_host(optarg, &dhcp_ip);
+ add_requested_server(dhcp_ip);
+ break;
- case 't': /* timeout */
+ case 'r': /* address we are requested from DHCP servers */
+ resolve_host(optarg, &requested_address);
+ request_specific_address = true;
+ break;
- /*
- if(is_intnonneg(optarg))
- */
- if(atoi(optarg)>0)
- dhcpoffer_timeout=atoi(optarg);
- /*
- else
- usage("Time interval must be a nonnegative integer\n");
- */
- break;
+ case 't': /* timeout */
+
+ /*
+ if(is_intnonneg(optarg))
+ */
+ if (atoi(optarg) > 0)
+ dhcpoffer_timeout = atoi(optarg);
+ /*
+ else
+ usage("Time interval must be a nonnegative integer\n");
+ */
+ break;
- case 'm': /* MAC address */
+ case 'm': /* MAC address */
- if((user_specified_mac=mac_aton(optarg)) == NULL)
- usage("Cannot parse MAC address.\n");
- if(verbose)
- print_hardware_address(user_specified_mac);
+ if ((user_specified_mac = mac_aton(optarg)) == NULL)
+ usage("Cannot parse MAC address.\n");
+ if (verbose)
+ print_hardware_address(user_specified_mac);
- break;
+ break;
- case 'i': /* interface name */
+ case 'i': /* interface name */
- strncpy(network_interface_name,optarg,sizeof(network_interface_name)-1);
- network_interface_name[sizeof(network_interface_name)-1]='\x0';
+ strncpy(network_interface_name, optarg, sizeof(network_interface_name) - 1);
+ network_interface_name[sizeof(network_interface_name) - 1] = '\x0';
- break;
+ break;
- case 'u': /* unicast testing */
- unicast=true;
- break;
- case 'x': /* exclusive testing aka "rogue DHCP server detection" */
- exclusive=true;
- break;
+ case 'u': /* unicast testing */
+ unicast = true;
+ break;
+ case 'x': /* exclusive testing aka "rogue DHCP server detection" */
+ exclusive = true;
+ break;
- case 'V': /* version */
- print_revision(progname, NP_VERSION);
- exit(STATE_UNKNOWN);
+ case 'V': /* version */
+ print_revision(progname, NP_VERSION);
+ exit(STATE_UNKNOWN);
- case 'h': /* help */
- print_help();
- exit(STATE_UNKNOWN);
+ case 'h': /* help */
+ print_help();
+ exit(STATE_UNKNOWN);
- case 'v': /* verbose */
- verbose=1;
- break;
- case '?': /* help */
- usage5 ();
- break;
+ case 'v': /* verbose */
+ verbose = 1;
+ break;
+ case '?': /* help */
+ usage5();
+ break;
- default:
- break;
+ default:
+ break;
}
}
return optind;
}
+int validate_arguments(int argc) {
-int validate_arguments(int argc){
-
- if(argc - optind > 0)
+ if (argc - optind > 0)
usage(_("Got unexpected non-option argument"));
return OK;
}
-
#if defined(__sun__) || defined(__solaris__) || defined(__hpux__)
/* 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;
@@ -1190,30 +1145,29 @@ static int get_msg(int fd){
ret = 0;
res = getmsg(fd, &ctl, &dat, &flags);
- if(res < 0){
- if(errno == EINTR){
- return(GOT_INTR);
- }
- else{
+ if (res < 0) {
+ if (errno == EINTR) {
+ return (GOT_INTR);
+ } else {
printf("%s\n", "get_msg FAILED.");
- return(GOT_ERR);
+ return (GOT_ERR);
}
}
- if(ctl.len > 0){
+ if (ctl.len > 0) {
ret |= GOT_CTRL;
}
- if(dat.len > 0){
+ if (dat.len > 0) {
ret |= GOT_DATA;
}
- return(ret);
+ 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){
+ 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);
}
@@ -1222,35 +1176,35 @@ static int check_ctrl(int prim){
}
/* 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){
+ 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;
+ 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){
+ 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;
+ 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){
+ 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);
}
@@ -1262,7 +1216,7 @@ static int dl_open(const char *dev, int unit, int *fd){
}
/* 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;
@@ -1274,12 +1228,11 @@ static int dl_bind(int fd, int sap, u_char *addr){
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)){
+ 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);
+ bcopy((u_char *)bind_ack + bind_ack->dl_addr_offset, addr, bind_ack->dl_addr_length);
return 0;
}
@@ -1296,13 +1249,13 @@ static int dl_bind(int fd, int sap, u_char *addr){
*
***********************************************************************/
-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);
+ if (GOT_ERR != dl_open(dev, unit, &fd)) {
+ if (GOT_ERR != dl_bind(fd, INSAP, mac_addr)) {
+ bcopy(mac_addr, addr, 6);
return 0;
}
}
@@ -1314,99 +1267,93 @@ long mac_addr_dlpi( const char *dev, int unit, u_char *addr){
/* Kompf 2000-2003 */
#endif
-
/* resolve host name or die (TODO: move this to netutils.c!) */
-void resolve_host(const char *in,struct in_addr *out){
+void resolve_host(const char *in, struct in_addr *out) {
struct addrinfo hints, *ai;
- memset(&hints,0,sizeof(hints));
- hints.ai_family=PF_INET;
- if (getaddrinfo(in,NULL,&hints,&ai) != 0)
- usage_va(_("Invalid hostname/address - %s"),optarg);
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_INET;
+ if (getaddrinfo(in, NULL, &hints, &ai) != 0)
+ usage_va(_("Invalid hostname/address - %s"), optarg);
- memcpy(out,&((struct sockaddr_in *)ai->ai_addr)->sin_addr,sizeof(*out));
+ memcpy(out, &((struct sockaddr_in *)ai->ai_addr)->sin_addr, sizeof(*out));
freeaddrinfo(ai);
}
-
/* parse MAC address string, return 6 bytes (unterminated) or NULL */
-unsigned char *mac_aton(const char *string){
+unsigned char *mac_aton(const char *string) {
static unsigned char result[6];
char tmp[3];
unsigned i, j;
- for(i=0, j=0; string[i] != '\0' && j < sizeof(result); i++){
+ for (i = 0, j = 0; string[i] != '\0' && j < sizeof(result); i++) {
/* ignore ':' and any other non-hex character */
- if(!isxdigit(string[i]) || !isxdigit(string[i+1]))
+ if (!isxdigit(string[i]) || !isxdigit(string[i + 1]))
continue;
- tmp[0]=string[i];
- tmp[1]=string[i+1];
- tmp[2]='\0';
- result[j]=strtol(tmp,(char **)NULL,16);
+ tmp[0] = string[i];
+ tmp[1] = string[i + 1];
+ tmp[2] = '\0';
+ result[j] = strtol(tmp, (char **)NULL, 16);
i++;
j++;
}
- return (j==6) ? result : NULL;
+ return (j == 6) ? result : NULL;
}
-
-void print_hardware_address(const unsigned char *address){
+void print_hardware_address(const unsigned char *address) {
int i;
printf(_("Hardware address: "));
- for (i=0; i<5; i++)
+ for (i = 0; i < 5; i++)
printf("%2.2x:", address[i]);
printf("%2.2x", address[i]);
putchar('\n');
}
-
/* print usage help */
-void print_help(void){
+void print_help(void) {
print_revision(progname, NP_VERSION);
printf("Copyright (c) 2001-2004 Ethan Galstad (nagios at nagios.org)\n");
- printf (COPYRIGHT, copyright, email);
+ printf(COPYRIGHT, copyright, email);
printf("%s\n", _("This plugin tests the availability of DHCP servers on a network."));
- printf ("\n\n");
+ printf("\n\n");
print_usage();
- printf (UT_HELP_VRSN);
- printf (UT_EXTRA_OPTS);
-
- printf (UT_VERBOSE);
-
- printf (" %s\n", "-s, --serverip=IPADDRESS");
- printf (" %s\n", _("IP address of DHCP server that we must hear from"));
- printf (" %s\n", "-r, --requestedip=IPADDRESS");
- printf (" %s\n", _("IP address that should be offered by at least one DHCP server"));
- printf (" %s\n", "-t, --timeout=INTEGER");
- printf (" %s\n", _("Seconds to wait for DHCPOFFER before timeout occurs"));
- printf (" %s\n", "-i, --interface=STRING");
- printf (" %s\n", _("Interface to to use for listening (i.e. eth0)"));
- printf (" %s\n", "-m, --mac=STRING");
- printf (" %s\n", _("MAC address to use in the DHCP request"));
- printf (" %s\n", "-u, --unicast");
- printf (" %s\n", _("Unicast testing: mimic a DHCP relay, requires -s"));
- printf (" %s\n", "-x, --exclusive");
- printf (" %s\n", _("Only requested DHCP server may response (rogue DHCP server detection), requires -s"));
-
- printf (UT_SUPPORT);
+ printf(UT_HELP_VRSN);
+ printf(UT_EXTRA_OPTS);
+
+ printf(UT_VERBOSE);
+
+ printf(" %s\n", "-s, --serverip=IPADDRESS");
+ printf(" %s\n", _("IP address of DHCP server that we must hear from"));
+ printf(" %s\n", "-r, --requestedip=IPADDRESS");
+ printf(" %s\n", _("IP address that should be offered by at least one DHCP server"));
+ printf(" %s\n", "-t, --timeout=INTEGER");
+ printf(" %s\n", _("Seconds to wait for DHCPOFFER before timeout occurs"));
+ printf(" %s\n", "-i, --interface=STRING");
+ printf(" %s\n", _("Interface to to use for listening (i.e. eth0)"));
+ printf(" %s\n", "-m, --mac=STRING");
+ printf(" %s\n", _("MAC address to use in the DHCP request"));
+ printf(" %s\n", "-u, --unicast");
+ printf(" %s\n", _("Unicast testing: mimic a DHCP relay, requires -s"));
+ printf(" %s\n", "-x, --exclusive");
+ printf(" %s\n", _("Only requested DHCP server may response (rogue DHCP server detection), requires -s"));
+
+ printf(UT_SUPPORT);
return;
}
+void print_usage(void) {
-void
-print_usage(void){
-
- printf ("%s\n", _("Usage:"));
- printf (" %s [-v] [-u] [-x] [-s serverip] [-r requestedip] [-t timeout]\n",progname);
- printf (" [-i interface] [-m mac]\n");
+ printf("%s\n", _("Usage:"));
+ printf(" %s [-v] [-u] [-x] [-s serverip] [-r requestedip] [-t timeout]\n", progname);
+ printf(" [-i interface] [-m mac]\n");
return;
}
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