| /* |
| * system.c |
| */ |
| /* Portions of this file are subject to the following copyright(s). See |
| * the Net-SNMP's COPYING file for more details and other copyrights |
| * that may apply: |
| */ |
| /*********************************************************** |
| Copyright 1992 by Carnegie Mellon University |
| |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, |
| provided that the above copyright notice appear in all copies and that |
| both that copyright notice and this permission notice appear in |
| supporting documentation, and that the name of CMU not be |
| used in advertising or publicity pertaining to distribution of the |
| software without specific, written prior permission. |
| |
| CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| SOFTWARE. |
| ******************************************************************/ |
| /* |
| * Portions of this file are copyrighted by: |
| * Copyright © 2003 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms specified in the COPYING file |
| * distributed with the Net-SNMP package. |
| */ |
| /* |
| * Portions of this file are copyrighted by: |
| * Copyright (C) 2007 Apple, Inc. All rights reserved. |
| * Use is subject to license terms specified in the COPYING file |
| * distributed with the Net-SNMP package. |
| */ |
| /* |
| * System dependent routines go here |
| */ |
| #include <net-snmp/net-snmp-config.h> |
| #include <net-snmp/net-snmp-features.h> |
| #include <stdio.h> |
| #include <ctype.h> |
| #include <errno.h> |
| |
| #if HAVE_IO_H |
| #include <io.h> |
| #endif |
| #if HAVE_DIRECT_H |
| #include <direct.h> |
| #endif |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #if HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| |
| #if TIME_WITH_SYS_TIME |
| # include <sys/time.h> |
| # include <time.h> |
| #else |
| # if HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| # else |
| # include <time.h> |
| # endif |
| #endif |
| |
| #include <sys/types.h> |
| |
| #if HAVE_NETINET_IN_H |
| #include <netinet/in.h> |
| #endif |
| |
| #if HAVE_SYS_SOCKET_H |
| #include <sys/socket.h> |
| #endif |
| #if HAVE_NET_IF_H |
| #include <net/if.h> |
| #endif |
| #if HAVE_NETDB_H |
| #include <netdb.h> |
| #endif |
| |
| |
| #if HAVE_SYS_SOCKIO_H |
| #include <sys/sockio.h> |
| #endif |
| |
| #if HAVE_SYS_IOCTL_H |
| #include <sys/ioctl.h> |
| #endif |
| |
| #ifdef HAVE_NLIST_H |
| #include <nlist.h> |
| #endif |
| |
| #if HAVE_SYS_FILE_H |
| #include <sys/file.h> |
| #endif |
| |
| #if HAVE_KSTAT_H |
| #include <kstat.h> |
| #endif |
| |
| #if HAVE_SYS_PARAM_H |
| #include <sys/param.h> |
| #endif |
| #if HAVE_SYS_SYSCTL_H |
| #include <sys/sysctl.h> |
| #endif |
| |
| #if HAVE_STRING_H |
| #include <string.h> |
| #else |
| #include <strings.h> |
| #endif |
| |
| #if HAVE_DMALLOC_H |
| #include <dmalloc.h> |
| #endif |
| |
| #ifdef HAVE_SYS_STAT_H |
| #include <sys/stat.h> |
| #endif |
| #if HAVE_FCNTL_H |
| #include <fcntl.h> |
| #endif |
| |
| #if defined(hpux10) || defined(hpux11) |
| #include <sys/pstat.h> |
| #endif |
| |
| #if HAVE_SYS_UTSNAME_H |
| #include <sys/utsname.h> |
| #endif |
| |
| #if HAVE_SYS_SYSTEMCFG_H |
| #include <sys/systemcfg.h> |
| #endif |
| |
| #if HAVE_SYS_SYSTEMINFO_H |
| #include <sys/systeminfo.h> |
| #endif |
| |
| #if defined(darwin9) |
| #include <crt_externs.h> /* for _NSGetArgv() */ |
| #endif |
| |
| #if HAVE_PWD_H |
| #include <pwd.h> |
| #endif |
| #if HAVE_GRP_H |
| #include <grp.h> |
| #endif |
| |
| #if HAVE_LIMITS_H |
| #include <limits.h> |
| #endif |
| |
| #if HAVE_ARPA_INET_H |
| #include <arpa/inet.h> |
| #endif |
| |
| #ifdef DNSSEC_LOCAL_VALIDATION |
| #if 1 /*HAVE_ARPA_NAMESER_H*/ |
| #include <arpa/nameser.h> |
| #endif |
| #include <validator/validator.h> |
| /* NetSNMP and DNSSEC-Tools both define FREE. We'll not use either here. */ |
| #undef FREE |
| #endif |
| |
| #include <net-snmp/types.h> |
| #include <net-snmp/output_api.h> |
| #include <net-snmp/utilities.h> |
| #include <net-snmp/library/system.h> /* for "internal" definitions */ |
| |
| #include <net-snmp/library/snmp_api.h> |
| #include <net-snmp/library/read_config.h> /* for get_temp_file_pattern() */ |
| |
| #include "inet_ntop.h" |
| |
| /* NetSNMP and DNSSEC-Tools both define FREE. We'll not use either here. */ |
| #undef FREE |
| |
| netsnmp_feature_child_of(system_all, libnetsnmp) |
| |
| netsnmp_feature_child_of(user_information, system_all) |
| netsnmp_feature_child_of(calculate_sectime_diff, system_all) |
| |
| #ifndef IFF_LOOPBACK |
| # define IFF_LOOPBACK 0 |
| #endif |
| |
| #ifdef INADDR_LOOPBACK |
| # define LOOPBACK INADDR_LOOPBACK |
| #else |
| # define LOOPBACK 0x7f000001 |
| #endif |
| |
| #ifndef EAI_FAIL |
| # define EAI_FAIL -4 /* Non-recoverable failure in name res. */ |
| #endif |
| |
| #if defined(HAVE_FORK) |
| static void |
| _daemon_prep(int stderr_log) |
| { |
| /* Avoid keeping any directory in use. */ |
| chdir("/"); |
| |
| if (stderr_log) |
| return; |
| |
| /* |
| * Close inherited file descriptors to avoid |
| * keeping unnecessary references. |
| */ |
| close(0); |
| close(1); |
| close(2); |
| |
| /* |
| * Redirect std{in,out,err} to /dev/null, just in case. |
| */ |
| open("/dev/null", O_RDWR); |
| dup(0); |
| dup(0); |
| } |
| #endif |
| |
| /** |
| * fork current process into the background. |
| * |
| * This function forks a process into the background, in order to |
| * become a daemon process. It does a few things along the way: |
| * |
| * - becoming a process/session group leader, and forking a second time so |
| * that process/session group leader can exit. |
| * |
| * - changing the working directory to / |
| * |
| * - closing stdin, stdout and stderr (unless stderr_log is set) and |
| * redirecting them to /dev/null |
| * |
| * @param quit_immediately : indicates if the parent process should |
| * exit after a successful fork. |
| * @param stderr_log : indicates if stderr is being used for |
| * logging and shouldn't be closed |
| * @returns -1 : fork error |
| * 0 : child process returning |
| * >0 : parent process returning. returned value is the child PID. |
| */ |
| int |
| netsnmp_daemonize(int quit_immediately, int stderr_log) |
| { |
| int i = 0; |
| DEBUGMSGT(("daemonize","deamonizing...\n")); |
| #if HAVE_FORK |
| #if defined(darwin9) |
| char path [PATH_MAX] = ""; |
| uint32_t size = sizeof (path); |
| |
| /* |
| * if we are already launched in a "daemonized state", just |
| * close & redirect the file descriptors |
| */ |
| if(getppid() <= 2) { |
| _daemon_prep(stderr_log); |
| return 0; |
| } |
| |
| if (_NSGetExecutablePath (path, &size)) |
| return -1; |
| #endif |
| /* |
| * Fork to return control to the invoking process and to |
| * guarantee that we aren't a process group leader. |
| */ |
| i = fork(); |
| if (i != 0) { |
| /* Parent. */ |
| DEBUGMSGT(("daemonize","first fork returned %d.\n", i)); |
| if(i == -1) { |
| snmp_log(LOG_ERR,"first fork failed (errno %d) in " |
| "netsnmp_daemonize()\n", errno); |
| return -1; |
| } |
| if (quit_immediately) { |
| DEBUGMSGT(("daemonize","parent exiting\n")); |
| exit(0); |
| } |
| } else { |
| /* Child. */ |
| #ifdef HAVE_SETSID |
| /* Become a process/session group leader. */ |
| setsid(); |
| #endif |
| /* |
| * Fork to let the process/session group leader exit. |
| */ |
| if ((i = fork()) != 0) { |
| DEBUGMSGT(("daemonize","second fork returned %d.\n", i)); |
| if(i == -1) { |
| snmp_log(LOG_ERR,"second fork failed (errno %d) in " |
| "netsnmp_daemonize()\n", errno); |
| } |
| /* Parent. */ |
| exit(0); |
| } |
| #ifndef WIN32 |
| else { |
| /* Child. */ |
| |
| DEBUGMSGT(("daemonize","child continuing\n")); |
| |
| #if ! defined(darwin9) |
| _daemon_prep(stderr_log); |
| #else |
| /* |
| * Some darwin calls (using mach ports) don't work after |
| * a fork. So, now that we've forked, we re-exec ourself |
| * to ensure that the child's mach ports are all set up correctly, |
| * the getppid call above will prevent the exec child from |
| * forking... |
| */ |
| char * const *argv = *_NSGetArgv (); |
| DEBUGMSGT(("daemonize","re-execing forked child\n")); |
| execv (path, argv); |
| snmp_log(LOG_ERR,"Forked child unable to re-exec - %s.\n", strerror (errno)); |
| exit (0); |
| #endif |
| } |
| #endif /* !WIN32 */ |
| } |
| #endif /* HAVE_FORK */ |
| return i; |
| } |
| |
| /* |
| * ********************************************* |
| */ |
| #ifdef WIN32 |
| in_addr_t |
| get_myaddr(void) |
| { |
| char local_host[130]; |
| int result; |
| LPHOSTENT lpstHostent; |
| SOCKADDR_IN in_addr, remote_in_addr; |
| SOCKET hSock; |
| int nAddrSize = sizeof(SOCKADDR); |
| |
| in_addr.sin_addr.s_addr = INADDR_ANY; |
| |
| result = gethostname(local_host, sizeof(local_host)); |
| if (result == 0) { |
| lpstHostent = gethostbyname((LPSTR) local_host); |
| if (lpstHostent) { |
| in_addr.sin_addr.s_addr = |
| *((u_long FAR *) (lpstHostent->h_addr)); |
| return ((in_addr_t) in_addr.sin_addr.s_addr); |
| } |
| } |
| |
| /* |
| * if we are here, than we don't have host addr |
| */ |
| hSock = socket(AF_INET, SOCK_DGRAM, 0); |
| if (hSock != INVALID_SOCKET) { |
| /* |
| * connect to any port and address |
| */ |
| remote_in_addr.sin_family = AF_INET; |
| remote_in_addr.sin_port = htons(IPPORT_ECHO); |
| remote_in_addr.sin_addr.s_addr = inet_addr("0.0.0.0"); |
| result = |
| connect(hSock, (LPSOCKADDR) & remote_in_addr, |
| sizeof(SOCKADDR)); |
| if (result != SOCKET_ERROR) { |
| /* |
| * get local ip address |
| */ |
| getsockname(hSock, (LPSOCKADDR) & in_addr, |
| (int FAR *) &nAddrSize); |
| } |
| closesocket(hSock); |
| } |
| return ((in_addr_t) in_addr.sin_addr.s_addr); |
| } |
| |
| long |
| get_uptime(void) |
| { |
| long return_value = 0; |
| DWORD buffersize = (sizeof(PERF_DATA_BLOCK) + |
| sizeof(PERF_OBJECT_TYPE)), |
| type = REG_EXPAND_SZ; |
| PPERF_DATA_BLOCK perfdata = NULL; |
| |
| /* |
| * min requirement is one PERF_DATA_BLOCK plus one PERF_OBJECT_TYPE |
| */ |
| perfdata = (PPERF_DATA_BLOCK) malloc(buffersize); |
| if (!perfdata) |
| return 0; |
| |
| memset(perfdata, 0, buffersize); |
| |
| RegQueryValueEx(HKEY_PERFORMANCE_DATA, |
| "Global", NULL, &type, (LPBYTE) perfdata, &buffersize); |
| |
| /* |
| * we can not rely on the return value since there is always more so |
| * we check the signature |
| */ |
| |
| if (wcsncmp(perfdata->Signature, L"PERF", 4) == 0) { |
| /* |
| * signature ok, and all we need is in the in the PERF_DATA_BLOCK |
| */ |
| return_value = (long) ((perfdata->PerfTime100nSec.QuadPart / |
| (LONGLONG) 100000)); |
| } else |
| return_value = GetTickCount() / 10; |
| |
| RegCloseKey(HKEY_PERFORMANCE_DATA); |
| free(perfdata); |
| |
| return return_value; |
| } |
| |
| char * |
| winsock_startup(void) |
| { |
| WORD VersionRequested; |
| WSADATA stWSAData; |
| int i; |
| static char errmsg[100]; |
| |
| /* winsock 1: use MAKEWORD(1,1) */ |
| /* winsock 2: use MAKEWORD(2,2) */ |
| |
| VersionRequested = MAKEWORD(2,2); |
| i = WSAStartup(VersionRequested, &stWSAData); |
| if (i != 0) { |
| if (i == WSAVERNOTSUPPORTED) |
| sprintf(errmsg, |
| "Unable to init. socket lib, does not support 1.1"); |
| else { |
| sprintf(errmsg, "Socket Startup error %d", i); |
| } |
| return (errmsg); |
| } |
| return (NULL); |
| } |
| |
| void |
| winsock_cleanup(void) |
| { |
| WSACleanup(); |
| } |
| |
| #else /* ! WIN32 */ |
| /*******************************************************************/ |
| |
| /* |
| * XXX What if we have multiple addresses? Or no addresses for that matter? |
| * XXX Could it be computed once then cached? Probably not worth it (not |
| * used very often). |
| */ |
| in_addr_t |
| get_myaddr(void) |
| { |
| int sd, i, lastlen = 0; |
| struct ifconf ifc; |
| struct ifreq *ifrp = NULL; |
| in_addr_t addr; |
| char *buf = NULL; |
| |
| if ((sd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| return 0; |
| } |
| |
| /* |
| * Cope with lots of interfaces and brokenness of ioctl SIOCGIFCONF on |
| * some platforms; see W. R. Stevens, ``Unix Network Programming Volume |
| * I'', p.435. |
| */ |
| |
| for (i = 8;; i += 8) { |
| buf = (char *) calloc(i, sizeof(struct ifreq)); |
| if (buf == NULL) { |
| close(sd); |
| return 0; |
| } |
| ifc.ifc_len = i * sizeof(struct ifreq); |
| ifc.ifc_buf = (caddr_t) buf; |
| |
| if (ioctl(sd, SIOCGIFCONF, (char *) &ifc) < 0) { |
| if (errno != EINVAL || lastlen != 0) { |
| /* |
| * Something has gone genuinely wrong. |
| */ |
| free(buf); |
| close(sd); |
| return 0; |
| } |
| /* |
| * Otherwise, it could just be that the buffer is too small. |
| */ |
| } else { |
| if (ifc.ifc_len == lastlen) { |
| /* |
| * The length is the same as the last time; we're done. |
| */ |
| break; |
| } |
| lastlen = ifc.ifc_len; |
| } |
| free(buf); |
| } |
| |
| for (ifrp = ifc.ifc_req; |
| (char *)ifrp < (char *)ifc.ifc_req + ifc.ifc_len; |
| #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN |
| ifrp = (struct ifreq *)(((char *) ifrp) + |
| sizeof(ifrp->ifr_name) + |
| ifrp->ifr_addr.sa_len) |
| #else |
| ifrp++ |
| #endif |
| ) { |
| if (ifrp->ifr_addr.sa_family != AF_INET) { |
| continue; |
| } |
| addr = ((struct sockaddr_in *) &(ifrp->ifr_addr))->sin_addr.s_addr; |
| |
| if (ioctl(sd, SIOCGIFFLAGS, (char *) ifrp) < 0) { |
| continue; |
| } |
| if ((ifrp->ifr_flags & IFF_UP) |
| #ifdef IFF_RUNNING |
| && (ifrp->ifr_flags & IFF_RUNNING) |
| #endif /* IFF_RUNNING */ |
| && !(ifrp->ifr_flags & IFF_LOOPBACK) |
| && addr != LOOPBACK) { |
| /* |
| * I *really* don't understand why this is necessary. Perhaps for |
| * some broken platform? Leave it for now. JBPN |
| */ |
| #ifdef SYS_IOCTL_H_HAS_SIOCGIFADDR |
| if (ioctl(sd, SIOCGIFADDR, (char *) ifrp) < 0) { |
| continue; |
| } |
| addr = |
| ((struct sockaddr_in *) &(ifrp->ifr_addr))->sin_addr. |
| s_addr; |
| #endif |
| free(buf); |
| close(sd); |
| return addr; |
| } |
| } |
| free(buf); |
| close(sd); |
| return 0; |
| } |
| |
| |
| #if !defined(solaris2) && !defined(linux) && !defined(cygwin) |
| /* |
| * Returns boottime in centiseconds(!). |
| * Caches this for future use. |
| */ |
| long |
| get_boottime(void) |
| { |
| static long boottime_csecs = 0; |
| #if defined(hpux10) || defined(hpux11) |
| struct pst_static pst_buf; |
| #else |
| struct timeval boottime; |
| #ifdef NETSNMP_CAN_USE_SYSCTL |
| int mib[2]; |
| size_t len; |
| #elif defined(NETSNMP_CAN_USE_NLIST) |
| int kmem; |
| #if !defined(hpux) |
| static char boottime_name[] = "_boottime"; |
| #else |
| static char boottime_name[] = "boottime"; |
| #endif |
| static char empty_name[] = ""; |
| struct nlist nl[2]; |
| |
| memset(nl, 0, sizeof(nl)); |
| nl[0].n_name = boottime_name; |
| nl[1].n_name = empty_name; |
| #endif /* NETSNMP_CAN_USE_SYSCTL */ |
| #endif /* hpux10 || hpux 11 */ |
| |
| |
| if (boottime_csecs != 0) |
| return (boottime_csecs); |
| |
| #if defined(hpux10) || defined(hpux11) |
| pstat_getstatic(&pst_buf, sizeof(struct pst_static), 1, 0); |
| boottime_csecs = pst_buf.boot_time * 100; |
| #elif NETSNMP_CAN_USE_SYSCTL |
| mib[0] = CTL_KERN; |
| mib[1] = KERN_BOOTTIME; |
| |
| len = sizeof(boottime); |
| |
| sysctl(mib, 2, &boottime, &len, NULL, 0); |
| boottime_csecs = (boottime.tv_sec * 100) + (boottime.tv_usec / 10000); |
| #elif defined(NETSNMP_CAN_USE_NLIST) |
| if ((kmem = open("/dev/kmem", 0)) < 0) |
| return 0; |
| nlist(KERNEL_LOC, nl); |
| if (nl[0].n_type == 0) { |
| close(kmem); |
| return 0; |
| } |
| |
| lseek(kmem, (long) nl[0].n_value, L_SET); |
| read(kmem, &boottime, sizeof(boottime)); |
| close(kmem); |
| boottime_csecs = (boottime.tv_sec * 100) + (boottime.tv_usec / 10000); |
| #else |
| return 0; |
| #endif /* hpux10 || hpux 11 */ |
| |
| return (boottime_csecs); |
| } |
| #endif |
| |
| /** |
| * Returns the system uptime in centiseconds. |
| * |
| * @note The value returned by this function is not identical to sysUpTime |
| * defined in RFC 1213. get_uptime() returns the system uptime while |
| * sysUpTime represents the time that has elapsed since the most recent |
| * restart of the network manager (snmpd). |
| * |
| * @see See also netsnmp_get_agent_uptime(). |
| */ |
| long |
| get_uptime(void) |
| { |
| #if defined(aix4) || defined(aix5) || defined(aix6) || defined(aix7) |
| static char lbolt_name[] = "lbolt"; |
| struct nlist nl; |
| int kmem; |
| time_t lbolt; |
| nl.n_name = lbolt_name; |
| if(knlist(&nl, 1, sizeof(struct nlist)) != 0) return(0); |
| if(nl.n_type == 0 || nl.n_value == 0) return(0); |
| if((kmem = open("/dev/mem", 0)) < 0) return 0; |
| lseek(kmem, (long) nl.n_value, L_SET); |
| read(kmem, &lbolt, sizeof(lbolt)); |
| close(kmem); |
| return(lbolt); |
| #elif defined(solaris2) |
| kstat_ctl_t *ksc = kstat_open(); |
| kstat_t *ks; |
| kid_t kid; |
| kstat_named_t *named; |
| u_long lbolt = 0; |
| |
| if (ksc) { |
| ks = kstat_lookup(ksc, "unix", -1, "system_misc"); |
| if (ks) { |
| kid = kstat_read(ksc, ks, NULL); |
| if (kid != -1) { |
| named = kstat_data_lookup(ks, "lbolt"); |
| if (named) { |
| #ifdef KSTAT_DATA_UINT32 |
| lbolt = named->value.ui32; |
| #else |
| lbolt = named->value.ul; |
| #endif |
| } |
| } |
| } |
| kstat_close(ksc); |
| } |
| return lbolt; |
| #elif defined(linux) || defined(cygwin) |
| FILE *in = fopen("/proc/uptime", "r"); |
| long uptim = 0, a, b; |
| if (in) { |
| if (2 == fscanf(in, "%ld.%ld", &a, &b)) |
| uptim = a * 100 + b; |
| fclose(in); |
| } |
| return uptim; |
| #else |
| struct timeval now; |
| long boottime_csecs, nowtime_csecs; |
| |
| boottime_csecs = get_boottime(); |
| if (boottime_csecs == 0) |
| return 0; |
| gettimeofday(&now, (struct timezone *) 0); |
| nowtime_csecs = (now.tv_sec * 100) + (now.tv_usec / 10000); |
| |
| return (nowtime_csecs - boottime_csecs); |
| #endif |
| } |
| |
| #endif /* ! WIN32 */ |
| /*******************************************************************/ |
| |
| #ifdef DNSSEC_LOCAL_VALIDATION |
| static val_context_t *_val_context = NULL; |
| |
| static val_context_t * |
| netsnmp_validator_context(void) |
| { |
| if (NULL == _val_context) { |
| int rc; |
| char *apptype = netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID, |
| NETSNMP_DS_LIB_APPTYPE); |
| DEBUGMSGTL(("dns:sec:context", "creating dnssec context for %s\n", |
| apptype)); |
| rc = val_create_context(apptype, &_val_context); |
| } |
| |
| return _val_context; |
| } |
| #endif /* DNSSEC_LOCAL_VALIDATION */ |
| |
| int |
| netsnmp_gethostbyname_v4(const char* name, in_addr_t *addr_out) |
| { |
| #if HAVE_GETADDRINFO |
| struct addrinfo *addrs = NULL; |
| struct addrinfo hint; |
| int err; |
| |
| memset(&hint, 0, sizeof hint); |
| hint.ai_flags = 0; |
| hint.ai_family = PF_INET; |
| hint.ai_socktype = SOCK_DGRAM; |
| hint.ai_protocol = 0; |
| |
| err = netsnmp_getaddrinfo(name, NULL, &hint, &addrs); |
| if (err != 0) { |
| return -1; |
| } |
| |
| if (addrs != NULL) { |
| memcpy(addr_out, |
| &((struct sockaddr_in *) addrs->ai_addr)->sin_addr, |
| sizeof(in_addr_t)); |
| freeaddrinfo(addrs); |
| } else { |
| DEBUGMSGTL(("get_thisaddr", |
| "Failed to resolve IPv4 hostname\n")); |
| } |
| return 0; |
| |
| #elif HAVE_GETHOSTBYNAME |
| struct hostent *hp = NULL; |
| |
| hp = netsnmp_gethostbyname(name); |
| if (hp == NULL) { |
| DEBUGMSGTL(("get_thisaddr", |
| "hostname (couldn't resolve)\n")); |
| return -1; |
| } else if (hp->h_addrtype != AF_INET) { |
| DEBUGMSGTL(("get_thisaddr", |
| "hostname (not AF_INET!)\n")); |
| return -1; |
| } else { |
| DEBUGMSGTL(("get_thisaddr", |
| "hostname (resolved okay)\n")); |
| memcpy(addr_out, hp->h_addr, sizeof(in_addr_t)); |
| } |
| return 0; |
| |
| #elif HAVE_GETIPNODEBYNAME |
| struct hostent *hp = NULL; |
| int err; |
| |
| hp = getipnodebyname(peername, AF_INET, 0, &err); |
| if (hp == NULL) { |
| DEBUGMSGTL(("get_thisaddr", |
| "hostname (couldn't resolve = %d)\n", err)); |
| return -1; |
| } |
| DEBUGMSGTL(("get_thisaddr", |
| "hostname (resolved okay)\n")); |
| memcpy(addr_out, hp->h_addr, sizeof(in_addr_t)); |
| return 0; |
| |
| #else /* HAVE_GETIPNODEBYNAME */ |
| return -1; |
| #endif |
| } |
| |
| int |
| netsnmp_getaddrinfo(const char *name, const char *service, |
| const struct addrinfo *hints, struct addrinfo **res) |
| { |
| #if HAVE_GETADDRINFO |
| struct addrinfo *addrs = NULL; |
| struct addrinfo hint; |
| int err; |
| #ifdef DNSSEC_LOCAL_VALIDATION |
| val_status_t val_status; |
| #endif |
| |
| DEBUGMSGTL(("dns:getaddrinfo", "looking up ")); |
| if (name) |
| DEBUGMSG(("dns:getaddrinfo", "\"%s\"", name)); |
| else |
| DEBUGMSG(("dns:getaddrinfo", "<NULL>")); |
| |
| if (service) |
| DEBUGMSG(("dns:getaddrinfo", ":\"%s\"", service)); |
| |
| if (hints) |
| DEBUGMSG(("dns:getaddrinfo", " with hint ({ ... })")); |
| else |
| DEBUGMSG(("dns:getaddrinfo", " with no hint")); |
| |
| DEBUGMSG(("dns:getaddrinfo", "\n")); |
| |
| if (NULL == hints) { |
| memset(&hint, 0, sizeof hint); |
| hint.ai_flags = 0; |
| hint.ai_family = PF_INET; |
| hint.ai_socktype = SOCK_DGRAM; |
| hint.ai_protocol = 0; |
| hints = &hint; |
| } else { |
| memcpy(&hint, hints, sizeof hint); |
| } |
| |
| #ifndef DNSSEC_LOCAL_VALIDATION |
| err = getaddrinfo(name, NULL, &hint, &addrs); |
| #else /* DNSSEC_LOCAL_VALIDATION */ |
| err = val_getaddrinfo(netsnmp_validator_context(), name, NULL, &hint, |
| &addrs, &val_status); |
| DEBUGMSGTL(("dns:sec:val", "err %d, val_status %d / %s; trusted: %d\n", |
| err, val_status, p_val_status(val_status), |
| val_istrusted(val_status))); |
| if (! val_istrusted(val_status)) { |
| int rc; |
| if ((err != 0) && VAL_GETADDRINFO_HAS_STATUS(err)) { |
| snmp_log(LOG_WARNING, |
| "WARNING: UNTRUSTED error in DNS resolution for %s!\n", |
| name); |
| rc = EAI_FAIL; |
| } else { |
| snmp_log(LOG_WARNING, |
| "The authenticity of DNS response is not trusted (%s)\n", |
| p_val_status(val_status)); |
| rc = EAI_NONAME; |
| } |
| /** continue anyways if DNSSEC_WARN_ONLY is set */ |
| if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, |
| NETSNMP_DS_LIB_DNSSEC_WARN_ONLY)) |
| return rc; |
| } |
| |
| |
| #endif /* DNSSEC_LOCAL_VALIDATION */ |
| *res = addrs; |
| if ((0 == err) && addrs && addrs->ai_addr) { |
| DEBUGMSGTL(("dns:getaddrinfo", "answer { AF_INET, %s:%hu }\n", |
| inet_ntoa(((struct sockaddr_in*)addrs->ai_addr)->sin_addr), |
| ntohs(((struct sockaddr_in*)addrs->ai_addr)->sin_port))); |
| } |
| return err; |
| #else |
| NETSNMP_LOGONCE((LOG_ERR, "getaddrinfo not available")); |
| return EAI_FAIL; |
| #endif /* getaddrinfo */ |
| } |
| |
| struct hostent * |
| netsnmp_gethostbyname(const char *name) |
| { |
| #if HAVE_GETHOSTBYNAME |
| #ifdef DNSSEC_LOCAL_VALIDATION |
| val_status_t val_status; |
| #endif |
| struct hostent *hp = NULL; |
| |
| if (NULL == name) |
| return NULL; |
| |
| DEBUGMSGTL(("dns:gethostbyname", "looking up %s\n", name)); |
| |
| #ifdef DNSSEC_LOCAL_VALIDATION |
| hp = val_gethostbyname(netsnmp_validator_context(), name, &val_status); |
| DEBUGMSGTL(("dns:sec:val", "val_status %d / %s; trusted: %d\n", |
| val_status, p_val_status(val_status), |
| val_istrusted(val_status))); |
| if (!val_istrusted(val_status)) { |
| snmp_log(LOG_WARNING, |
| "The authenticity of DNS response is not trusted (%s)\n", |
| p_val_status(val_status)); |
| /** continue anyways if DNSSEC_WARN_ONLY is set */ |
| if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, |
| NETSNMP_DS_LIB_DNSSEC_WARN_ONLY)) |
| hp = NULL; |
| } |
| else if (val_does_not_exist(val_status) && hp) |
| hp = NULL; |
| #else |
| hp = gethostbyname(name); |
| #endif |
| if (hp == NULL) { |
| DEBUGMSGTL(("dns:gethostbyname", |
| "couldn't resolve %s\n", name)); |
| } else if (hp->h_addrtype != AF_INET) { |
| DEBUGMSGTL(("dns:gethostbyname", |
| "warning: response for %s not AF_INET!\n", name)); |
| } else { |
| DEBUGMSGTL(("dns:gethostbyname", |
| "%s resolved okay\n", name)); |
| } |
| return hp; |
| #else |
| NETSNMP_LOGONCE((LOG_ERR, "gethostbyname not available")); |
| return NULL; |
| #endif /* HAVE_GETHOSTBYNAME */ |
| } |
| |
| /** |
| * Look up the host name via DNS. |
| * |
| * @param[in] addr Pointer to the address to resolve. This argument points e.g. |
| * to a struct in_addr for AF_INET or to a struct in6_addr for AF_INET6. |
| * @param[in] len Length in bytes of *addr. |
| * @param[in] type Address family, e.g. AF_INET or AF_INET6. |
| * |
| * @return Pointer to a hostent structure if address lookup succeeded or NULL |
| * if the lookup failed. |
| * |
| * @see See also the gethostbyaddr() man page. |
| */ |
| struct hostent * |
| netsnmp_gethostbyaddr(const void *addr, socklen_t len, int type) |
| { |
| #if HAVE_GETHOSTBYADDR |
| struct hostent *hp = NULL; |
| char buf[64]; |
| |
| DEBUGMSGTL(("dns:gethostbyaddr", "resolving %s\n", |
| inet_ntop(type, addr, buf, sizeof(buf)))); |
| |
| #ifdef DNSSEC_LOCAL_VALIDATION |
| val_status_t val_status; |
| hp = val_gethostbyaddr(netsnmp_validator_context(), addr, len, type, |
| &val_status); |
| DEBUGMSGTL(("dns:sec:val", "val_status %d / %s; trusted: %d\n", |
| val_status, p_val_status(val_status), |
| val_istrusted(val_status))); |
| if (!val_istrusted(val_status)) { |
| snmp_log(LOG_WARNING, |
| "The authenticity of DNS response is not trusted (%s)\n", |
| p_val_status(val_status)); |
| /** continue anyways if DNSSEC_WARN_ONLY is set */ |
| if (!netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID, |
| NETSNMP_DS_LIB_DNSSEC_WARN_ONLY)) |
| hp = NULL; |
| } |
| else if (val_does_not_exist(val_status) && hp) |
| hp = NULL; |
| #else |
| hp = gethostbyaddr(addr, len, type); |
| #endif |
| if (hp == NULL) { |
| DEBUGMSGTL(("dns:gethostbyaddr", "couldn't resolve addr\n")); |
| } else if (hp->h_addrtype != AF_INET) { |
| DEBUGMSGTL(("dns:gethostbyaddr", |
| "warning: response for addr not AF_INET!\n")); |
| } else { |
| DEBUGMSGTL(("dns:gethostbyaddr", "addr resolved okay\n")); |
| } |
| return hp; |
| #else |
| NETSNMP_LOGONCE((LOG_ERR, "gethostbyaddr not available")); |
| return NULL; |
| #endif |
| } |
| |
| /*******************************************************************/ |
| |
| #ifndef HAVE_STRNCASECMP |
| |
| /* |
| * test for NULL pointers before and NULL characters after |
| * * comparing possibly non-NULL strings. |
| * * WARNING: This function does NOT check for array overflow. |
| */ |
| int |
| strncasecmp(const char *s1, const char *s2, size_t nch) |
| { |
| size_t ii; |
| int res = -1; |
| |
| if (!s1) { |
| if (!s2) |
| return 0; |
| return (-1); |
| } |
| if (!s2) |
| return (1); |
| |
| for (ii = 0; (ii < nch) && *s1 && *s2; ii++, s1++, s2++) { |
| res = (int) (tolower(*s1) - tolower(*s2)); |
| if (res != 0) |
| break; |
| } |
| |
| if (ii == nch) { |
| s1--; |
| s2--; |
| } |
| |
| if (!*s1) { |
| if (!*s2) |
| return 0; |
| return (-1); |
| } |
| if (!*s2) |
| return (1); |
| |
| return (res); |
| } |
| |
| int |
| strcasecmp(const char *s1, const char *s2) |
| { |
| return strncasecmp(s1, s2, 1000000); |
| } |
| |
| #endif /* HAVE_STRNCASECMP */ |
| |
| |
| #ifndef HAVE_STRDUP |
| char * |
| strdup(const char *src) |
| { |
| int len; |
| char *dst; |
| |
| len = strlen(src) + 1; |
| if ((dst = (char *) malloc(len)) == NULL) |
| return (NULL); |
| strcpy(dst, src); |
| return (dst); |
| } |
| #endif /* HAVE_STRDUP */ |
| |
| #ifndef HAVE_SETENV |
| int |
| setenv(const char *name, const char *value, int overwrite) |
| { |
| char *cp; |
| int ret; |
| |
| if (overwrite == 0) { |
| if (getenv(name)) |
| return 0; |
| } |
| cp = (char *) malloc(strlen(name) + strlen(value) + 2); |
| if (cp == NULL) |
| return -1; |
| sprintf(cp, "%s=%s", name, value); |
| ret = putenv(cp); |
| #ifdef WIN32 |
| free(cp); |
| #endif |
| return ret; |
| } |
| #endif /* HAVE_SETENV */ |
| |
| netsnmp_feature_child_of(calculate_time_diff, netsnmp_unused) |
| #ifndef NETSNMP_FEATURE_REMOVE_CALCULATE_TIME_DIFF |
| /** |
| * Compute (*now - *then) in centiseconds. |
| */ |
| int |
| calculate_time_diff(const struct timeval *now, const struct timeval *then) |
| { |
| struct timeval diff; |
| |
| NETSNMP_TIMERSUB(now, then, &diff); |
| return (int)(diff.tv_sec * 100 + diff.tv_usec / 10000); |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_CALCULATE_TIME_DIFF */ |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_CALCULATE_SECTIME_DIFF |
| /** Compute rounded (*now - *then) in seconds. */ |
| u_int |
| calculate_sectime_diff(const struct timeval *now, const struct timeval *then) |
| { |
| struct timeval diff; |
| |
| NETSNMP_TIMERSUB(now, then, &diff); |
| return diff.tv_sec + (diff.tv_usec >= 500000L); |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_CALCULATE_SECTIME_DIFF */ |
| |
| #ifndef HAVE_STRCASESTR |
| /* |
| * only glibc2 has this. |
| */ |
| char * |
| strcasestr(const char *haystack, const char *needle) |
| { |
| const char *cp1 = haystack, *cp2 = needle; |
| const char *cx; |
| int tstch1, tstch2; |
| |
| /* |
| * printf("looking for '%s' in '%s'\n", needle, haystack); |
| */ |
| if (cp1 && cp2 && *cp1 && *cp2) |
| for (cp1 = haystack, cp2 = needle; *cp1;) { |
| cx = cp1; |
| cp2 = needle; |
| do { |
| /* |
| * printf("T'%c' ", *cp1); |
| */ |
| if (!*cp2) { /* found the needle */ |
| /* |
| * printf("\nfound '%s' in '%s'\n", needle, cx); |
| */ |
| return NETSNMP_REMOVE_CONST(char *, cx); |
| } |
| if (!*cp1) |
| break; |
| |
| tstch1 = toupper(*cp1); |
| tstch2 = toupper(*cp2); |
| if (tstch1 != tstch2) |
| break; |
| /* |
| * printf("M'%c' ", *cp1); |
| */ |
| cp1++; |
| cp2++; |
| } |
| while (1); |
| if (*cp1) |
| cp1++; |
| } |
| /* |
| * printf("\n"); |
| */ |
| if (cp1 && *cp1) |
| return NETSNMP_REMOVE_CONST(char *, cp1); |
| |
| return NULL; |
| } |
| #endif |
| |
| int |
| mkdirhier(const char *pathname, mode_t mode, int skiplast) |
| { |
| struct stat sbuf; |
| char *ourcopy = strdup(pathname); |
| char *entry; |
| char *buf = NULL; |
| char *st = NULL; |
| int res; |
| |
| res = SNMPERR_GENERR; |
| if (!ourcopy) |
| goto out; |
| |
| buf = malloc(strlen(pathname) + 2); |
| if (!buf) |
| goto out; |
| |
| #if defined (WIN32) || defined (cygwin) |
| /* convert backslash to forward slash */ |
| for (entry = ourcopy; *entry; entry++) |
| if (*entry == '\\') |
| *entry = '/'; |
| #endif |
| |
| entry = strtok_r(ourcopy, "/", &st); |
| |
| buf[0] = '\0'; |
| |
| #if defined (WIN32) || defined (cygwin) |
| /* |
| * Check if first entry contains a drive-letter |
| * e.g "c:/path" |
| */ |
| if ((entry) && (':' == entry[1]) && |
| (('\0' == entry[2]) || ('/' == entry[2]))) { |
| strcat(buf, entry); |
| entry = strtok_r(NULL, "/", &st); |
| } |
| #endif |
| |
| /* |
| * check to see if filename is a directory |
| */ |
| while (entry) { |
| strcat(buf, "/"); |
| strcat(buf, entry); |
| entry = strtok_r(NULL, "/", &st); |
| if (entry == NULL && skiplast) |
| break; |
| if (stat(buf, &sbuf) < 0) { |
| /* |
| * DNE, make it |
| */ |
| #ifdef WIN32 |
| if (CreateDirectory(buf, NULL) == 0) |
| #else |
| if (mkdir(buf, mode) == -1) |
| #endif |
| goto out; |
| else |
| snmp_log(LOG_INFO, "Created directory: %s\n", buf); |
| } else { |
| /* |
| * exists, is it a file? |
| */ |
| if ((sbuf.st_mode & S_IFDIR) == 0) { |
| /* |
| * ack! can't make a directory on top of a file |
| */ |
| goto out; |
| } |
| } |
| } |
| res = SNMPERR_SUCCESS; |
| out: |
| free(buf); |
| free(ourcopy); |
| return res; |
| } |
| |
| /** |
| * netsnmp_mktemp creates a temporary file based on the |
| * configured tempFilePattern |
| * |
| * @return file descriptor |
| */ |
| const char * |
| netsnmp_mktemp(void) |
| { |
| #ifdef PATH_MAX |
| static char name[PATH_MAX]; |
| #else |
| static char name[256]; |
| #endif |
| int fd = -1; |
| |
| strlcpy(name, get_temp_file_pattern(), sizeof(name)); |
| #ifdef HAVE_MKSTEMP |
| { |
| mode_t oldmask = umask(~(S_IRUSR | S_IWUSR)); |
| netsnmp_assert(oldmask != (mode_t)(-1)); |
| fd = mkstemp(name); |
| umask(oldmask); |
| } |
| #else |
| if (mktemp(name)) { |
| # ifndef WIN32 |
| fd = open(name, O_CREAT | O_EXCL | O_WRONLY, S_IRUSR | S_IWUSR); |
| # else |
| /* |
| * Win32 needs _S_IREAD | _S_IWRITE to set permissions on file |
| * after closing |
| */ |
| fd = _open(name, _O_CREAT | _O_EXCL | _O_WRONLY, _S_IREAD | _S_IWRITE); |
| # endif |
| } |
| #endif |
| if (fd >= 0) { |
| close(fd); |
| DEBUGMSGTL(("netsnmp_mktemp", "temp file created: %s\n", |
| name)); |
| return name; |
| } |
| snmp_log(LOG_ERR, "netsnmp_mktemp: error creating file %s\n", |
| name); |
| return NULL; |
| } |
| |
| /* |
| * This function was created to differentiate actions |
| * that are appropriate for Linux 2.4 kernels, but not later kernels. |
| * |
| * This function can be used to test kernels on any platform that supports uname(). |
| * |
| * If not running a platform that supports uname(), return -1. |
| * |
| * If ospname matches, and the release matches up through the prefix, |
| * return 0. |
| * If the release is ordered higher, return 1. |
| * Be aware that "ordered higher" is not a guarantee of correctness. |
| */ |
| int |
| netsnmp_os_prematch(const char *ospmname, |
| const char *ospmrelprefix) |
| { |
| #if HAVE_SYS_UTSNAME_H |
| static int printOSonce = 1; |
| struct utsname utsbuf; |
| if ( 0 > uname(&utsbuf)) |
| return -1; |
| |
| if (printOSonce) { |
| printOSonce = 0; |
| /* show the four elements that the kernel can be sure of */ |
| DEBUGMSGT(("daemonize","sysname '%s',\nrelease '%s',\nversion '%s',\nmachine '%s'\n", |
| utsbuf.sysname, utsbuf.release, utsbuf.version, utsbuf.machine)); |
| } |
| if (0 != strcasecmp(utsbuf.sysname, ospmname)) return -1; |
| |
| /* Required to match only the leading characters */ |
| return strncasecmp(utsbuf.release, ospmrelprefix, strlen(ospmrelprefix)); |
| |
| #else |
| |
| return -1; |
| |
| #endif /* HAVE_SYS_UTSNAME_H */ |
| } |
| |
| /** |
| * netsnmp_os_kernel_width determines kernel width at runtime |
| * Currently implemented for IRIX, AIX and Tru64 Unix |
| * |
| * @return kernel width (usually 32 or 64) on success, -1 on error |
| */ |
| int |
| netsnmp_os_kernel_width(void) |
| { |
| #ifdef irix6 |
| char buf[8]; |
| sysinfo(_MIPS_SI_OS_NAME, buf, 7); |
| if (strncmp("IRIX64", buf, 6) == 0) { |
| return 64; |
| } else if (strncmp("IRIX", buf, 4) == 0) { |
| return 32; |
| } else { |
| return -1; |
| } |
| #elif defined(aix4) || defined(aix5) || defined(aix6) || defined(aix7) |
| return (__KERNEL_32() ? 32 : (__KERNEL_64() ? 64 : -1)); |
| #elif defined(osf4) || defined(osf5) || defined(__alpha) |
| return 64; /* Alpha is always 64bit */ |
| #else |
| /* kernel width detection not implemented */ |
| return -1; |
| #endif |
| } |
| |
| netsnmp_feature_child_of(str_to_uid, user_information) |
| #ifndef NETSNMP_FEATURE_REMOVE_STR_TO_UID |
| /** |
| * Convert a user name or number into numeric form. |
| * |
| * @param[in] useroruid Either a Unix user name or the ASCII representation |
| * of a user number. |
| * |
| * @return Either a user number > 0 or 0 if useroruid is not a valid user |
| * name, not a valid user number or the name of the root user. |
| */ |
| int netsnmp_str_to_uid(const char *useroruid) { |
| int uid; |
| #if HAVE_GETPWNAM && HAVE_PWD_H |
| struct passwd *pwd; |
| #endif |
| |
| uid = atoi(useroruid); |
| |
| if (uid == 0) { |
| #if HAVE_GETPWNAM && HAVE_PWD_H |
| pwd = getpwnam(useroruid); |
| uid = pwd ? pwd->pw_uid : 0; |
| endpwent(); |
| #endif |
| if (uid == 0) |
| snmp_log(LOG_WARNING, "Can't identify user (%s).\n", useroruid); |
| } |
| return uid; |
| |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_STR_TO_UID */ |
| |
| netsnmp_feature_child_of(str_to_gid, user_information) |
| #ifndef NETSNMP_FEATURE_REMOVE_STR_TO_GID |
| /** |
| * Convert a group name or number into numeric form. |
| * |
| * @param[in] grouporgid Either a Unix group name or the ASCII representation |
| * of a group number. |
| * |
| * @return Either a group number > 0 or 0 if grouporgid is not a valid group |
| * name, not a valid group number or the root group. |
| */ |
| int netsnmp_str_to_gid(const char *grouporgid) |
| { |
| int gid; |
| |
| gid = atoi(grouporgid); |
| |
| if (gid == 0) { |
| #if HAVE_GETGRNAM && HAVE_GRP_H |
| struct group *grp; |
| |
| grp = getgrnam(grouporgid); |
| gid = grp ? grp->gr_gid : 0; |
| endgrent(); |
| #endif |
| if (gid == 0) |
| snmp_log(LOG_WARNING, "Can't identify group (%s).\n", grouporgid); |
| } |
| |
| return gid; |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_STR_TO_GID */ |
