X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=plugins%2Fnetutils.c;h=1d6100abf843efd3f25a8209adbdcfa4042d8fd4;hb=386b791af2a5c9d95531d2ca047dd8ffc12bcb2e;hp=4ca3168d9553e7767ef893b9aba0ea8769f42a60;hpb=9e17dab6c3e4b4e7142f3ea5b2a60fcd488dc709;p=nagiosplug.git diff --git a/plugins/netutils.c b/plugins/netutils.c index 4ca3168..1d6100a 100644 --- a/plugins/netutils.c +++ b/plugins/netutils.c @@ -1,92 +1,64 @@ -/**************************************************************************** -* +/***************************************************************************** +* * Nagios plugins network utilities -* +* * License: GPL * Copyright (c) 1999 Ethan Galstad (nagios@nagios.org) -* -* Last Modified: $Date$ -* +* Copyright (c) 2003-2008 Nagios Plugins Development Team +* * Description: -* +* * This file contains commons functions used in many of the plugins. -* -* License Information: -* -* This program is free software; you can redistribute it and/or modify +* +* +* 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 2 of the License, or +* 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, write to the Free Software -* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -* -****************************************************************************/ +* along with this program. If not, see . +* +* +*****************************************************************************/ + +#define LOCAL_TIMEOUT_ALARM_HANDLER #include "common.h" #include "netutils.h" -int socket_timeout = DEFAULT_SOCKET_TIMEOUT; int econn_refuse_state = STATE_CRITICAL; int was_refused = FALSE; +#if USE_IPV6 int address_family = AF_UNSPEC; +#else +int address_family = AF_INET; +#endif /* handles socket timeouts */ void socket_timeout_alarm_handler (int sig) { if (sig == SIGALRM) - printf ("CRITICAL - Socket timeout after %d seconds\n", socket_timeout); + printf (_("%s - Socket timeout after %d seconds\n"), state_text(socket_timeout_state), socket_timeout); else - printf ("CRITICAL - Abnormal timeout after %d seconds\n", socket_timeout); - - exit (STATE_CRITICAL); -} - - -/* connects to a host on a specified TCP port, sends a string, - and gets a response */ -int -process_tcp_request (char *server_address, int server_port, - char *send_buffer, char *recv_buffer, int recv_size) -{ - int result; - - result = process_request (server_address, server_port, - IPPROTO_TCP, send_buffer, recv_buffer, recv_size); + printf (_("%s - Abnormal timeout after %d seconds\n"), state_text(socket_timeout_state), socket_timeout); - return result; -} - - -/* connects to a host on a specified UDP port, sends a string, and gets a - response */ -int -process_udp_request (char *server_address, int server_port, - char *send_buffer, char *recv_buffer, int recv_size) -{ - int result; - - result = process_request (server_address, server_port, - IPPROTO_UDP, send_buffer, recv_buffer, recv_size); - - return result; + exit (socket_timeout_state); } - -/* 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 +/* 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 (char *server_address, int server_port, - char *send_buffer, char *recv_buffer, int recv_size) +process_tcp_request2 (const char *server_address, int server_port, + const char *send_buffer, char *recv_buffer, int recv_size) { int result; @@ -97,13 +69,13 @@ process_tcp_request2 (char *server_address, int server_port, fd_set readfds; int recv_length = 0; - result = my_connect (server_address, server_port, &sd, IPPROTO_TCP); + result = np_net_connect (server_address, server_port, &sd, IPPROTO_TCP); if (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 ("send() failed\n"); + printf ("%s\n", _("Send failed")); result = STATE_WARNING; } @@ -120,7 +92,7 @@ process_tcp_request2 (char *server_address, int server_port, if (!FD_ISSET (sd, &readfds)) { /* it hasn't */ if (!recv_length) { strcpy (recv_buffer, ""); - printf ("No data was recieved from host!\n"); + printf ("%s\n", _("No data was received from host!")); result = STATE_WARNING; } else { /* this one failed, but previous ones worked */ @@ -130,8 +102,8 @@ process_tcp_request2 (char *server_address, int server_port, } else { /* it has */ recv_result = - recv (sd, recv_buffer + recv_length, - recv_size - recv_length - 1, 0); + 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, ""); @@ -160,60 +132,23 @@ process_tcp_request2 (char *server_address, int server_port, return result; } -/* connects to a host on a specified port, sends a string, and gets a + +/* connects to a host on a specified port, sends a string, and gets a response */ int -process_request (char *server_address, int server_port, int proto, - char *send_buffer, char *recv_buffer, int recv_size) +process_request (const char *server_address, int server_port, int proto, + const char *send_buffer, char *recv_buffer, int recv_size) { int result; - int send_result; - int recv_result; int sd; - struct timeval tv; - fd_set readfds; result = STATE_OK; - result = my_connect (server_address, server_port, &sd, proto); + result = np_net_connect (server_address, server_port, &sd, proto); if (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 ("send() failed\n"); - 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); - - /* make sure some data has arrived */ - if (!FD_ISSET (sd, &readfds)) { - strcpy (recv_buffer, ""); - printf ("No data was recieved from host!\n"); - result = STATE_WARNING; - } - - else { - recv_result = recv (sd, recv_buffer, recv_size - 1, 0); - if (recv_result == -1) { - strcpy (recv_buffer, ""); - if (proto != IPPROTO_TCP) - printf ("recv() failed\n"); - result = STATE_WARNING; - } - else - recv_buffer[recv_result] = 0; - - /* die returned string */ - recv_buffer[recv_size - 1] = 0; - } + result = send_request (sd, proto, send_buffer, recv_buffer, recv_size); close (sd); @@ -221,65 +156,57 @@ process_request (char *server_address, int server_port, int proto, } -/* opens a connection to a remote host/tcp port */ -int -my_tcp_connect (char *host_name, int port, int *sd) -{ - int result; - - result = my_connect (host_name, port, sd, IPPROTO_TCP); - - return result; -} - - -/* opens a connection to a remote host/udp port */ -int -my_udp_connect (char *host_name, int port, int *sd) -{ - int result; - - result = my_connect (host_name, port, sd, IPPROTO_UDP); - - return result; -} - - -/* opens a tcp or udp connection to a remote host */ +/* opens a tcp or udp connection to a remote host or local socket */ int -my_connect (char *host_name, int port, int *sd, int proto) +np_net_connect (const char *host_name, int port, int *sd, int proto) { struct addrinfo hints; - struct addrinfo *res; - char port_str[6]; - int result; - - memset (&hints, 0, sizeof (hints)); - hints.ai_family = address_family; - hints.ai_protocol = proto; - hints.ai_socktype = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM; - - snprintf (port_str, sizeof (port_str), "%d", port); - result = getaddrinfo (host_name, port_str, &hints, &res); + struct addrinfo *r, *res; + struct sockaddr_un su; + char port_str[6], host[MAX_HOST_ADDRESS_LENGTH]; + size_t len; + int socktype, result; + + socktype = (proto == IPPROTO_UDP) ? SOCK_DGRAM : SOCK_STREAM; + + /* as long as it doesn't start with a '/', it's assumed a host or ip */ + if(host_name[0] != '/'){ + memset (&hints, 0, sizeof (hints)); + hints.ai_family = address_family; + hints.ai_protocol = proto; + hints.ai_socktype = socktype; + + 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)) + return STATE_UNKNOWN; + 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)); + return STATE_UNKNOWN; + } - if (result != 0) { - printf ("%s\n", gai_strerror (result)); - return STATE_UNKNOWN; - } - else { - while (res) { + r = res; + while (r) { /* attempt to create a socket */ - *sd = socket (res->ai_family, (proto == IPPROTO_UDP) ? - SOCK_DGRAM : SOCK_STREAM, res->ai_protocol); + *sd = socket (r->ai_family, socktype, r->ai_protocol); if (*sd < 0) { - printf ("Socket creation failed\n"); - freeaddrinfo (res); + printf ("%s\n", _("Socket creation failed")); + freeaddrinfo (r); return STATE_UNKNOWN; } /* attempt to open a connection */ - result = connect (*sd, res->ai_addr, res->ai_addrlen); + result = connect (*sd, r->ai_addr, r->ai_addrlen); if (result == 0) { was_refused = FALSE; @@ -289,25 +216,50 @@ my_connect (char *host_name, int port, int *sd, int proto) if (result < 0) { switch (errno) { case ECONNREFUSED: - switch (econn_refuse_state) { - case STATE_OK: - case STATE_WARNING: - was_refused = TRUE; - } + was_refused = TRUE; break; } } close (*sd); - res = res->ai_next; + r = r->ai_next; } freeaddrinfo (res); } + /* else the hostname is interpreted as a path to a unix socket */ + else { + if(strlen(host_name) >= UNIX_PATH_MAX){ + die(STATE_UNKNOWN, _("Supplied path too long unix domain socket")); + } + memset(&su, 0, sizeof(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){ + die(STATE_UNKNOWN, _("Socket creation failed")); + } + result = connect(*sd, (struct sockaddr *)&su, sizeof(su)); + if (result < 0 && errno == ECONNREFUSED) + was_refused = TRUE; + } if (result == 0) return STATE_OK; - else if (was_refused) - return econn_refuse_state; + else 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 */ + return econn_refuse_state; + break; + case STATE_CRITICAL: /* user did not set econn_refuse_state */ + printf ("%s\n", strerror(errno)); + return econn_refuse_state; + break; + default: /* it's a logic error if we do not end up in STATE_(OK|WARNING|CRITICAL) */ + return STATE_UNKNOWN; + break; + } + } else { printf ("%s\n", strerror(errno)); return STATE_CRITICAL; @@ -315,7 +267,55 @@ my_connect (char *host_name, int port, int *sd, int proto) } int -is_host (char *address) +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; + + 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")); + 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); + + /* make sure some data has arrived */ + if (!FD_ISSET (sd, &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); + if (recv_result == -1) { + strcpy (recv_buffer, ""); + if (proto != IPPROTO_TCP) + printf ("%s\n", _("Receive failed")); + result = STATE_WARNING; + } + else + recv_buffer[recv_result] = 0; + + /* die returned string */ + recv_buffer[recv_size - 1] = 0; + } + return result; +} + + +int +is_host (const char *address) { if (is_addr (address) || is_hostname (address)) return (TRUE); @@ -323,18 +323,23 @@ is_host (char *address) return (FALSE); } +void +host_or_die(const char *str) +{ + if(!str || (!is_addr(str) && !is_hostname(str))) + usage_va(_("Invalid hostname/address - %s"), str); +} + int -is_addr (char *address) +is_addr (const char *address) { #ifdef USE_IPV6 - if (is_inet_addr (address) && address_family != AF_INET6) + if (address_family == AF_INET && is_inet_addr (address)) + return TRUE; + else if (address_family == AF_INET6 && is_inet6_addr (address)) + return TRUE; #else if (is_inet_addr (address)) -#endif - return (TRUE); - -#ifdef USE_IPV6 - if (is_inet6_addr (address) && address_family != AF_INET) return (TRUE); #endif @@ -342,7 +347,7 @@ is_addr (char *address) } int -resolve_host_or_addr (char *address, int family) +resolve_host_or_addr (const char *address, int family) { struct addrinfo hints; struct addrinfo *res; @@ -359,28 +364,3 @@ resolve_host_or_addr (char *address, int family) return TRUE; } } - -int -is_inet_addr (char *address) -{ - return resolve_host_or_addr (address, AF_INET); -} - -#ifdef USE_IPV6 -int -is_inet6_addr (char *address) -{ - return resolve_host_or_addr (address, AF_INET6); -} -#endif - -int -is_hostname (char *s1) -{ -#ifdef USE_IPV6 - return resolve_host_or_addr (s1, address_family); -#else - return resolve_host_or_addr (s1, AF_INET); -#endif -} -