1 files changed, 229 insertions, 218 deletions

diff --git a/plugins/netutils.c b/plugins/netutils.c
index c6af248e..b4c6ff0a 100644
--- a/plugins/netutils.c
+++ b/plugins/netutils.c
@@ -1,40 +1,43 @@
 /*****************************************************************************
-* 
-* Monitoring Plugins network utilities
-* 
-* License: GPL
-* Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
-* Copyright (c) 2003-2008 Monitoring Plugins Development Team
-* 
-* Description:
-* 
-* This file contains commons functions used in many of the plugins.
-* 
-* 
-* This program is free software: you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
-* the Free Software Foundation, either version 3 of the License, or
-* (at your option) any later version.
-* 
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-* GNU General Public License for more details.
-* 
-* You should have received a copy of the GNU General Public License
-* along with this program.  If not, see <http://www.gnu.org/licenses/>.
-* 
-* 
-*****************************************************************************/
+ *
+ * Monitoring Plugins network utilities
+ *
+ * License: GPL
+ * Copyright (c) 1999 Ethan Galstad (nagios@nagios.org)
+ * Copyright (c) 2003-2024 Monitoring Plugins Development Team
+ *
+ * Description:
+ *
+ * This file contains commons functions used in many of the plugins.
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ *****************************************************************************/
 
 #include "common.h"
+#include "output.h"
+#include "states.h"
+#include <sys/types.h>
 #include "netutils.h"
 
 unsigned int socket_timeout = DEFAULT_SOCKET_TIMEOUT;
-unsigned int socket_timeout_state = STATE_CRITICAL;
-
-int econn_refuse_state = STATE_CRITICAL;
+mp_state_enum socket_timeout_state = STATE_CRITICAL;
+mp_state_enum econn_refuse_state = STATE_CRITICAL;
 bool was_refused = false;
+
 #if USE_IPV6
 int address_family = AF_UNSPEC;
 #else
@@ -42,177 +45,177 @@ int address_family = AF_INET;
 #endif
 
 /* handles socket timeouts */
-void
-socket_timeout_alarm_handler (int sig)
-{
-        if (sig == SIGALRM)
-                printf (_("%s - Socket timeout after %d seconds\n"), state_text(socket_timeout_state),  socket_timeout);
-        else
-                printf (_("%s - Abnormal timeout after %d seconds\n"), state_text(socket_timeout_state), socket_timeout);
-
-        exit (socket_timeout_state);
-}
+void socket_timeout_alarm_handler(int sig) {
+        mp_subcheck timeout_sc = mp_subcheck_init();
+        timeout_sc = mp_set_subcheck_state(timeout_sc, socket_timeout_state);
+
+        if (sig == SIGALRM) {
+                xasprintf(&timeout_sc.output, _("Socket timeout after %d seconds\n"), socket_timeout);
+        } else {
+                xasprintf(&timeout_sc.output, _("Abnormal timeout after %d seconds\n"), socket_timeout);
+        }
+
+        mp_check overall = mp_check_init();
+        mp_add_subcheck_to_check(&overall, timeout_sc);
 
+        mp_exit(overall);
+}
 
 /* connects to a host on a specified tcp port, sends a string, and gets a
          response. loops on select-recv until timeout or eof to get all of a
          multi-packet answer */
-int
-process_tcp_request2 (const char *server_address, int server_port,
-        const char *send_buffer, char *recv_buffer, int recv_size)
-{
+mp_state_enum process_tcp_request2(const char *server_address, const int server_port,
+                                                                   const char *send_buffer, char *recv_buffer,
+                                                                   const int recv_size) {
 
-        int result;
-        int send_result;
-        int recv_result;
-        int sd;
-        struct timeval tv;
-        fd_set readfds;
-        int recv_length = 0;
+        int socket;
 
-        result = np_net_connect (server_address, server_port, &sd, IPPROTO_TCP);
-        if (result != STATE_OK)
+        mp_state_enum connect_result =
+                np_net_connect(server_address, server_port, &socket, IPPROTO_TCP);
+        if (connect_result != STATE_OK) {
                 return STATE_CRITICAL;
+        }
 
-        send_result = send (sd, send_buffer, strlen (send_buffer), 0);
-        if (send_result<0 || (size_t)send_result!=strlen(send_buffer)) {
-                printf ("%s\n", _("Send failed"));
+        mp_state_enum result;
+        ssize_t send_result = send(socket, send_buffer, strlen(send_buffer), 0);
+        if (send_result < 0 || (size_t)send_result != strlen(send_buffer)) {
+                // printf("%s\n", _("Send failed"));
                 result = STATE_WARNING;
         }
 
-        while (1) {
+        fd_set readfds;
+        ssize_t recv_length = 0;
+        while (true) {
                 /* wait up to the number of seconds for socket timeout
                    minus one for data from the host */
-                tv.tv_sec = socket_timeout - 1;
-                tv.tv_usec = 0;
-                FD_ZERO (&readfds);
-                FD_SET (sd, &readfds);
-                select (sd + 1, &readfds, NULL, NULL, &tv);
+                struct timeval timeout = {
+                        .tv_sec = socket_timeout - 1,
+                        .tv_usec = 0,
+                };
+                FD_ZERO(&readfds);
+                FD_SET(socket, &readfds);
+                select(socket + 1, &readfds, NULL, NULL, &timeout);
 
                 /* make sure some data has arrived */
-                if (!FD_ISSET (sd, &readfds)) { /* it hasn't */
+                if (!FD_ISSET(socket, &readfds)) { /* it hasn't */
                         if (!recv_length) {
-                                strcpy (recv_buffer, "");
-                                printf ("%s\n", _("No data was received from host!"));
+                                strcpy(recv_buffer, "");
+                                // printf("%s\n", _("No data was received from host!"));
                                 result = STATE_WARNING;
-                        }
-                        else {                                                                          /* this one failed, but previous ones worked */
+                        } else { /* this one failed, but previous ones worked */
                                 recv_buffer[recv_length] = 0;
                         }
                         break;
+                } /* it has */
+
+                ssize_t recv_result =
+                        recv(socket, recv_buffer + recv_length, (size_t)(recv_size - recv_length - 1), 0);
+                if (recv_result == -1) {
+                        /* recv failed, bail out */
+                        strcpy(recv_buffer + recv_length, "");
+                        result = STATE_WARNING;
+                        break;
                 }
-                else {                                                                                  /* it has */
-                        recv_result =
-                                recv (sd, recv_buffer + recv_length,
-                                        (size_t)recv_size - recv_length - 1, 0);
-                        if (recv_result == -1) {
-                                /* recv failed, bail out */
-                                strcpy (recv_buffer + recv_length, "");
-                                result = STATE_WARNING;
-                                break;
-                        }
-                        else if (recv_result == 0) {
-                                /* end of file ? */
-                                recv_buffer[recv_length] = 0;
-                                break;
-                        }
-                        else {                                                                          /* we got data! */
-                                recv_length += recv_result;
-                                if (recv_length >= recv_size - 1) {
-                                        /* buffer full, we're done */
-                                        recv_buffer[recv_size - 1] = 0;
-                                        break;
-                                }
-                        }
+
+                if (recv_result == 0) {
+                        /* end of file ? */
+                        recv_buffer[recv_length] = 0;
+                        break;
+                }
+
+                /* we got data! */
+                recv_length += recv_result;
+                if (recv_length >= recv_size - 1) {
+                        /* buffer full, we're done */
+                        recv_buffer[recv_size - 1] = 0;
+                        break;
                 }
                 /* end if(!FD_ISSET(sd,&readfds)) */
         }
-        /* end while(1) */
 
-        close (sd);
+        close(socket);
         return result;
 }
 
-
 /* connects to a host on a specified port, sends a string, and gets a
    response */
-int
-process_request (const char *server_address, int server_port, int proto,
-        const char *send_buffer, char *recv_buffer, int recv_size)
-{
-        int result;
-        int sd;
-
-        result = STATE_OK;
+mp_state_enum process_request(const char *server_address, const int server_port, const int proto,
+                                                          const char *send_buffer, char *recv_buffer, const int recv_size) {
 
-        result = np_net_connect (server_address, server_port, &sd, proto);
-        if (result != STATE_OK)
+        mp_state_enum result = STATE_OK;
+        int socket;
+        result = np_net_connect(server_address, server_port, &socket, proto);
+        if (result != STATE_OK) {
                 return STATE_CRITICAL;
+        }
 
-        result = send_request (sd, proto, send_buffer, recv_buffer, recv_size);
+        result = send_request(socket, proto, send_buffer, recv_buffer, recv_size);
 
-        close (sd);
+        close(socket);
 
         return result;
 }
 
-
 /* opens a tcp or udp connection to a remote host or local socket */
-int
-np_net_connect (const char *host_name, int port, int *sd, int proto)
-{
-        /* send back STATE_UNKOWN if there's an error
-           send back STATE_OK if we connect
-           send back STATE_CRITICAL if we can't connect.
-           Let upstream figure out what to send to the user. */
-        struct addrinfo hints;
-        struct addrinfo *r, *res;
-        struct sockaddr_un su;
-        char port_str[6], host[MAX_HOST_ADDRESS_LENGTH];
-        size_t len;
-        int socktype, result;
-        short is_socket = (host_name[0] == '/');
-
-        socktype = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
-
+mp_state_enum np_net_connect(const char *host_name, int port, int *socketDescriptor,
+                                                         const int proto) {
+        /* send back STATE_UNKOWN if there's an error
+           send back STATE_OK if we connect
+           send back STATE_CRITICAL if we can't connect.
+           Let upstream figure out what to send to the user. */
+        bool is_socket = (host_name[0] == '/');
+        int socktype = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM;
+
+        struct addrinfo hints = {};
+        struct addrinfo *res = NULL;
+        int result;
         /* as long as it doesn't start with a '/', it's assumed a host or ip */
-        if (!is_socket){
-                memset (&hints, 0, sizeof (hints));
+        if (!is_socket) {
+                memset(&hints, 0, sizeof(hints));
                 hints.ai_family = address_family;
                 hints.ai_protocol = proto;
                 hints.ai_socktype = socktype;
 
-                len = strlen (host_name);
+                size_t len = strlen(host_name);
                 /* check for an [IPv6] address (and strip the brackets) */
                 if (len >= 2 && host_name[0] == '[' && host_name[len - 1] == ']') {
                         host_name++;
                         len -= 2;
                 }
-                if (len >= sizeof(host))
+
+                char host[MAX_HOST_ADDRESS_LENGTH];
+
+                if (len >= sizeof(host)) {
                         return STATE_UNKNOWN;
-                memcpy (host, host_name, len);
+                }
+
+                memcpy(host, host_name, len);
                 host[len] = '\0';
-                snprintf (port_str, sizeof (port_str), "%d", port);
-                result = getaddrinfo (host, port_str, &hints, &res);
 
-                if (result != 0) {
-                        printf ("%s\n", gai_strerror (result));
+                char port_str[6];
+                snprintf(port_str, sizeof(port_str), "%d", port);
+                int getaddrinfo_err = getaddrinfo(host, port_str, &hints, &res);
+
+                if (getaddrinfo_err != 0) {
+                        // printf("%s\n", gai_strerror(result));
                         return STATE_UNKNOWN;
                 }
 
-                r = res;
-                while (r) {
+                struct addrinfo *addressPointer = res;
+                while (addressPointer) {
                         /* attempt to create a socket */
-                        *sd = socket (r->ai_family, socktype, r->ai_protocol);
+                        *socketDescriptor =
+                                socket(addressPointer->ai_family, socktype, addressPointer->ai_protocol);
 
-                        if (*sd < 0) {
-                                printf ("%s\n", _("Socket creation failed"));
-                                freeaddrinfo (r);
+                        if (*socketDescriptor < 0) {
+                                // printf("%s\n", _("Socket creation failed"));
+                                freeaddrinfo(addressPointer);
                                 return STATE_UNKNOWN;
                         }
 
                         /* attempt to open a connection */
-                        result = connect (*sd, r->ai_addr, r->ai_addrlen);
+                        result =
+                                connect(*socketDescriptor, addressPointer->ai_addr, addressPointer->ai_addrlen);
 
                         if (result == 0) {
                                 was_refused = false;
@@ -227,149 +230,157 @@ np_net_connect (const char *host_name, int port, int *sd, int proto)
                                 }
                         }
 
-                        close (*sd);
-                        r = r->ai_next;
+                        close(*socketDescriptor);
+                        addressPointer = addressPointer->ai_next;
                 }
-                freeaddrinfo (res);
-        }
-        /* else the hostname is interpreted as a path to a unix socket */
-        else {
-                if(strlen(host_name) >= UNIX_PATH_MAX){
+
+                freeaddrinfo(res);
+
+        } else {
+                /* else the hostname is interpreted as a path to a unix socket */
+                if (strlen(host_name) >= UNIX_PATH_MAX) {
                         die(STATE_UNKNOWN, _("Supplied path too long unix domain socket"));
                 }
-                memset(&su, 0, sizeof(su));
+
+                struct sockaddr_un su = {};
                 su.sun_family = AF_UNIX;
                 strncpy(su.sun_path, host_name, UNIX_PATH_MAX);
-                *sd = socket(PF_UNIX, SOCK_STREAM, 0);
-                if(*sd < 0){
+                *socketDescriptor = socket(PF_UNIX, SOCK_STREAM, 0);
+
+                if (*socketDescriptor < 0) {
                         die(STATE_UNKNOWN, _("Socket creation failed"));
                 }
-                result = connect(*sd, (struct sockaddr *)&su, sizeof(su));
-                if (result < 0 && errno == ECONNREFUSED)
+
+                result = connect(*socketDescriptor, (struct sockaddr *)&su, sizeof(su));
+                if (result < 0 && errno == ECONNREFUSED) {
                         was_refused = true;
+                }
         }
 
-        if (result == 0)
+        if (result == 0) {
                 return STATE_OK;
-        else if (was_refused) {
+        }
+
+        if (was_refused) {
                 switch (econn_refuse_state) { /* a user-defined expected outcome */
                 case STATE_OK:
                 case STATE_WARNING:  /* user wants WARN or OK on refusal, or... */
                 case STATE_CRITICAL: /* user did not set econn_refuse_state, or wanted critical */
-                        if (is_socket)
-                                printf("connect to file socket %s: %s\n", host_name, strerror(errno));
-                        else
-                                printf("connect to address %s and port %d: %s\n",
-                                       host_name, port, strerror(errno));
+                        if (is_socket) {
+                                // printf("connect to file socket %s: %s\n", host_name, strerror(errno));
+                        } else {
+                                // printf("connect to address %s and port %d: %s\n", host_name, port,
+                                // strerror(errno));
+                        }
                         return STATE_CRITICAL;
                         break;
                 default: /* it's a logic error if we do not end up in STATE_(OK|WARNING|CRITICAL) */
                         return STATE_UNKNOWN;
                         break;
                 }
-        }
-        else {
-                if (is_socket)
-                        printf("connect to file socket %s: %s\n", host_name, strerror(errno));
-                else
-                        printf("connect to address %s and port %d: %s\n",
-                               host_name, port, strerror(errno));
+        } else {
+                if (is_socket) {
+                        // printf("connect to file socket %s: %s\n", host_name, strerror(errno));
+                } else {
+                        // printf("connect to address %s and port %d: %s\n", host_name, port, strerror(errno));
+                }
                 return STATE_CRITICAL;
         }
 }
 
-int
-send_request (int sd, int proto, const char *send_buffer, char *recv_buffer, int recv_size)
-{
-        int result = STATE_OK;
-        int send_result;
-        int recv_result;
-        struct timeval tv;
-        fd_set readfds;
+mp_state_enum send_request(const int socket, const int proto, const char *send_buffer,
+                                                   char *recv_buffer, const int recv_size) {
+        mp_state_enum result = STATE_OK;
 
-        send_result = send (sd, send_buffer, strlen (send_buffer), 0);
-        if (send_result<0 || (size_t)send_result!=strlen(send_buffer)) {
-                printf ("%s\n", _("Send failed"));
+        ssize_t send_result = send(socket, send_buffer, strlen(send_buffer), 0);
+        if (send_result < 0 || (size_t)send_result != strlen(send_buffer)) {
+                // printf("%s\n", _("Send failed"));
                 result = STATE_WARNING;
         }
 
         /* wait up to the number of seconds for socket timeout minus one
            for data from the host */
-        tv.tv_sec = socket_timeout - 1;
-        tv.tv_usec = 0;
-        FD_ZERO (&readfds);
-        FD_SET (sd, &readfds);
-        select (sd + 1, &readfds, NULL, NULL, &tv);
+        struct timeval timestamp = {
+                .tv_sec = socket_timeout - 1,
+                .tv_usec = 0,
+        };
+        fd_set readfds;
+        FD_ZERO(&readfds);
+        FD_SET(socket, &readfds);
+        select(socket + 1, &readfds, NULL, NULL, &timestamp);
 
         /* make sure some data has arrived */
-        if (!FD_ISSET (sd, &readfds)) {
-                strcpy (recv_buffer, "");
-                printf ("%s\n", _("No data was received from host!"));
+        if (!FD_ISSET(socket, &readfds)) {
+                strcpy(recv_buffer, "");
+                // printf("%s\n", _("No data was received from host!"));
                 result = STATE_WARNING;
-        }
-
-        else {
-                recv_result = recv (sd, recv_buffer, (size_t)recv_size - 1, 0);
+        } else {
+                ssize_t recv_result = recv(socket, recv_buffer, (size_t)(recv_size - 1), 0);
                 if (recv_result == -1) {
-                        strcpy (recv_buffer, "");
-                        if (proto != IPPROTO_TCP)
-                                printf ("%s\n", _("Receive failed"));
+                        strcpy(recv_buffer, "");
+                        if (proto != IPPROTO_TCP) {
+                                // printf("%s\n", _("Receive failed"));
+                        }
                         result = STATE_WARNING;
-                }
-                else
+                } else {
                         recv_buffer[recv_result] = 0;
+                }
 
                 /* die returned string */
                 recv_buffer[recv_size - 1] = 0;
         }
+
         return result;
 }
 
-
-bool is_host (const char *address) {
-        if (is_addr (address) || is_hostname (address))
+bool is_host(const char *address) {
+        if (is_addr(address) || is_hostname(address)) {
                 return (true);
+        }
 
         return (false);
 }
 
-void
-host_or_die(const char *str)
-{
-        if(!str || (!is_addr(str) && !is_hostname(str)))
+void host_or_die(const char *str) {
+        if (!str || (!is_addr(str) && !is_hostname(str))) {
                 usage_va(_("Invalid hostname/address - %s"), str);
+        }
 }
 
-bool is_addr (const char *address) {
+bool is_addr(const char *address) {
 #ifdef USE_IPV6
-        if (address_family == AF_INET && is_inet_addr (address))
+        if (address_family == AF_INET && is_inet_addr(address)) {
                 return true;
-        else if (address_family == AF_INET6 && is_inet6_addr (address))
+        }
+
+        if (address_family == AF_INET6 && is_inet6_addr(address)) {
                 return true;
+        }
 #else
-        if (is_inet_addr (address))
-                return (true);
+        if (is_inet_addr(address)) {
+                return true;
+        }
 #endif
 
-        return (false);
+        return false;
 }
 
-int
-dns_lookup (const char *in, struct sockaddr_storage *ss, int family)
-{
+bool dns_lookup(const char *node_string, struct sockaddr_storage *ss, const int family) {
         struct addrinfo hints;
-        struct addrinfo *res;
-        int retval;
-
-        memset (&hints, 0, sizeof(struct addrinfo));
+        memset(&hints, 0, sizeof(struct addrinfo));
         hints.ai_family = family;
 
-        retval = getaddrinfo (in, NULL, &hints, &res);
-        if (retval != 0)
+        struct addrinfo *res;
+        int retval = getaddrinfo(node_string, NULL, &hints, &res);
+        if (retval != 0) {
                 return false;
+        }
+
+        if (ss != NULL) {
+                memcpy(ss, res->ai_addr, res->ai_addrlen);
+        }
+
+        freeaddrinfo(res);
 
-        if (ss != NULL)
-                memcpy (ss, res->ai_addr, res->ai_addrlen);
-        freeaddrinfo (res);
         return true;
 }