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net-snmp/agent/mibgroup/util_funcs.c

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/*
* util_funcs.c
*/
/*
* Portions of this file are copyrighted by:
* Copyright 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) 2016 VMware, Inc. All rights reserved.
* Use is subject to license terms specified in the COPYING file
* distributed with the Net-SNMP package.
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-features.h>
#include <sys/types.h>
#if HAVE_IO_H
#include <io.h>
#endif
#include <stdio.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef __alpha
#ifndef _BSD
#define _BSD
#define _myBSD
#endif
#endif
#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifdef __alpha
#ifdef _myBSD
#undef _BSD
#undef _myBSD
#endif
#endif
#ifndef WEXITSTATUS
# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
#endif
#ifndef WIFEXITED
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#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
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <errno.h>
#include <signal.h>
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include <ctype.h>
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_BASETSD_H
#include <basetsd.h>
#define ssize_t SSIZE_T
#endif
#if HAVE_RAISE
#define alarm raise
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/library/snmp_logging.h>
#include <net-snmp/agent/netsnmp_close_fds.h>
#include "struct.h"
#include "util_funcs.h"
#include "utilities/execute.h"
#if HAVE_LIMITS_H
#include "limits.h"
#endif
#ifdef USING_UCD_SNMP_ERRORMIB_MODULE
#include "ucd-snmp/errormib.h"
#else
#define setPerrorstatus(x) snmp_log_perror(x)
#endif
netsnmp_feature_child_of(util_funcs, libnetsnmpmibs)
netsnmp_feature_child_of(shell_command, util_funcs)
netsnmp_feature_child_of(get_exten_instance, util_funcs)
netsnmp_feature_child_of(clear_cache, util_funcs)
netsnmp_feature_child_of(find_field, util_funcs)
netsnmp_feature_child_of(parse_miboid, util_funcs)
netsnmp_feature_child_of(string_append_int, util_funcs)
netsnmp_feature_child_of(internal_mib_table, util_funcs)
#if defined(HAVE_LINUX_RTNETLINK_H)
netsnmp_feature_child_of(prefix_info_all, util_funcs)
netsnmp_feature_child_of(prefix_info, prefix_info_all)
netsnmp_feature_child_of(update_prefix_info, prefix_info_all)
netsnmp_feature_child_of(delete_prefix_info, prefix_info_all)
netsnmp_feature_child_of(find_prefix_info, prefix_info_all)
netsnmp_feature_child_of(create_prefix_info, prefix_info_all)
#endif /* HAVE_LINUX_RTNETLINK_H */
#if defined(NETSNMP_EXCACHETIME) && defined(USING_UTILITIES_EXECUTE_MODULE) && defined(HAVE_EXECV)
static long cachetime;
#endif
/** deprecated, use netsnmp_mktemp instead */
const char *
make_tempfile(void)
{
return netsnmp_mktemp();
}
#ifndef NETSNMP_FEATURE_REMOVE_SHELL_COMMAND
int
shell_command(struct extensible *ex)
{
#if HAVE_SYSTEM
const char *ofname;
char *shellline = NULL;
FILE *shellout;
ofname = make_tempfile();
if (ofname == NULL) {
ex->output[0] = 0;
ex->result = 127;
return ex->result;
}
if (asprintf(&shellline, "%s > %s", ex->command, ofname) >= 0) {
ex->result = system(shellline);
ex->result = WEXITSTATUS(ex->result);
free(shellline);
}
shellout = fopen(ofname, "r");
if (shellout != NULL) {
if (fgets(ex->output, sizeof(ex->output), shellout) == NULL) {
ex->output[0] = 0;
}
fclose(shellout);
}
unlink(ofname);
#else
ex->output[0] = 0;
ex->result = 0;
#endif
return (ex->result);
}
#endif /* NETSNMP_FEATURE_REMOVE_SHELL_COMMAND */
#define MAXOUTPUT 300
int
exec_command(struct extensible *ex)
{
#if defined (HAVE_EXECV) || defined (WIN32)
int fd;
FILE *file;
if ((fd = get_exec_output(ex)) != -1) {
file = fdopen(fd, "r");
if (fgets(ex->output, sizeof(ex->output), file) == NULL) {
ex->output[0] = 0;
}
fclose(file);
wait_on_exec(ex);
} else
#endif /* HAVE_EXECV */
{
ex->output[0] = 0;
ex->result = 0;
}
return (ex->result);
}
#ifndef NETSNMP_FEATURE_REMOVE_GET_EXTEN_INSTANCE
struct extensible *
get_exten_instance(struct extensible *exten, size_t inst)
{
int i;
if (exten == NULL)
return (NULL);
for (i = 1; i != (int) inst && exten != NULL; i++)
exten = exten->next;
return (exten);
}
#endif /* NETSNMP_FEATURE_REMOVE_GET_EXTEN_INSTANCE */
void
wait_on_exec(struct extensible *ex)
{
#if defined(WIN32) && !defined (mingw32)
int rc;
if (ex->tid != 0 && ex->pid != 0) {
HANDLE hThread = ex->tid;
HANDLE hProcess = ex->pid;
rc = WaitForSingleObject(hProcess, NETSNMP_TIMEOUT_WAITFORSINGLEOBJECT);
DEBUGMSGT(("exec:wait_on_exec","WaitForSingleObject rc=(%d)\n",rc ));
rc = CloseHandle( hThread );
DEBUGMSGT(("exec:wait_on_exec","CloseHandle hThread=(%d)\n",rc ));
rc = CloseHandle( hProcess );
DEBUGMSGT(("exec:wait_on_exec","CloseHandle hProcess=(%d)\n",rc ));
ex->pid = 0;
ex->tid = 0;
}
#else
#ifndef NETSNMP_EXCACHETIME
if (ex->pid && waitpid(ex->pid, &ex->result, 0) < 0) {
setPerrorstatus("waitpid");
}
ex->pid = 0;
#endif /* NETSNMP_EXCACHETIME */
#endif /* WIN32 */
}
#define MAXARGS 30
int
get_exec_output(struct extensible *ex)
{
#ifndef USING_UTILITIES_EXECUTE_MODULE
ex->result = -1;
NETSNMP_LOGONCE((LOG_WARNING, "support for run_exec_command not available\n"));
#else
#if HAVE_EXECV
char cachefile[STRMAX];
char cache[NETSNMP_MAXCACHESIZE];
int cachebytes;
int cfd;
#ifdef NETSNMP_EXCACHETIME
long curtime;
static char lastcmd[STRMAX];
static int lastresult;
#endif
DEBUGMSGTL(("exec:get_exec_output","calling %s\n", ex->command));
sprintf(cachefile, "%s/%s", get_persistent_directory(), NETSNMP_CACHEFILE);
#ifdef NETSNMP_EXCACHETIME
curtime = time(NULL);
if (curtime > (cachetime + NETSNMP_EXCACHETIME) ||
strcmp(ex->command, lastcmd) != 0) {
strlcpy(lastcmd, ex->command, sizeof(lastcmd));
cachetime = curtime;
#endif
cachebytes = NETSNMP_MAXCACHESIZE;
ex->result = run_exec_command( ex->command, NULL, cache, &cachebytes );
unlink(cachefile);
/*
* XXX Use SNMP_FILEMODE_CLOSED instead of 644?
*/
if ((cfd = open(cachefile, O_WRONLY | O_TRUNC | O_CREAT, 0600)) < 0) {
snmp_log(LOG_ERR,"can not create cache file\n");
setPerrorstatus(cachefile);
#ifdef NETSNMP_EXCACHETIME
cachetime = 0;
#endif
return -1;
}
if (cachebytes > 0)
write(cfd, (void *) cache, cachebytes);
close(cfd);
#ifdef NETSNMP_EXCACHETIME
lastresult = ex->result;
} else {
ex->result = lastresult;
}
#endif
DEBUGMSGTL(("exec:get_exec_output","using cached value\n"));
if ((cfd = open(cachefile, O_RDONLY)) < 0) {
snmp_log(LOG_ERR,"can not open cache file\n");
setPerrorstatus(cachefile);
return -1;
}
return (cfd);
#else /* !HAVE_EXECV */
#if defined(WIN32) && !defined(HAVE_EXECV)
/* MSVC and MinGW. Cygwin already works as it has execv and fork */
int fd;
/* Reference: MS tech note: 190351 */
HANDLE hOutputReadTmp, hOutputRead, hOutputWrite = NULL;
HANDLE hErrorWrite;
SECURITY_ATTRIBUTES sa;
PROCESS_INFORMATION pi;
STARTUPINFO si;
sa.nLength= sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
DEBUGMSGTL(("exec:get_exec_output","calling %s\n", ex->command));
/* Child temporary output pipe with Inheritance on (sa.bInheritHandle is true) */
if (!CreatePipe(&hOutputReadTmp,&hOutputWrite,&sa,0)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes CreatePipe ChildOut: %lu\n",
GetLastError()));
return -1;
}
/* Copy the stdout handle to the stderr handle in case the child closes one of
* its stdout handles. */
if (!DuplicateHandle(GetCurrentProcess(),hOutputWrite, GetCurrentProcess(),
&hErrorWrite,0, TRUE,DUPLICATE_SAME_ACCESS)) {
DEBUGMSGTL(("util_funcs", "get_exec_output DuplicateHandle: %lu\n", GetLastError()));
return -1;
}
/* Create new copies of the input and output handles but set bInheritHandle to
* FALSE so the new handle can not be inherited. Otherwise the handles can not
* be closed. */
if (!DuplicateHandle(GetCurrentProcess(), hOutputReadTmp, GetCurrentProcess(),
&hOutputRead, 0, FALSE, DUPLICATE_SAME_ACCESS)) {
DEBUGMSGTL(("util_funcs", "get_exec_output DupliateHandle ChildOut: %lu\n", GetLastError()));
CloseHandle(hErrorWrite);
return -1;
}
/* Close the temporary output and input handles */
if (!CloseHandle(hOutputReadTmp)) {
DEBUGMSGTL(("util_funcs", "get_exec_output CloseHandle (hOutputReadTmp): %lu\n", GetLastError()));
CloseHandle(hErrorWrite);
CloseHandle(hOutputRead);
return -1;
}
/* Associates a C run-time file descriptor with an existing operating-system file handle. */
fd = _open_osfhandle((intptr_t) hOutputRead, 0);
/* Set up STARTUPINFO for CreateProcess with the handles and have it hide the window
* for the new process. */
ZeroMemory(&si,sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
si.hStdOutput = hOutputWrite;
si.hStdError = hErrorWrite;
si.wShowWindow = SW_HIDE;
/* Launch the process that you want to redirect. Example snmpd.conf pass_persist:
* pass_persist .1.3.6.1.4.1.2021.255 c:/perl/bin/perl c:/temp/pass_persisttest
*/
if (!CreateProcess(NULL, ex->command, NULL, NULL, TRUE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi)) {
DEBUGMSGTL(("util_funcs","get_exec_output CreateProcess:'%s' %lu\n",ex->command, GetLastError()));
CloseHandle(hErrorWrite);
CloseHandle(hOutputRead);
return -1;
}
/* Set global child process handle */
ex->pid = pi.hProcess;
ex->tid = pi.hThread;
/* Close pipe handles to make sure that no handles to the write end of the
* output pipe are maintained in this process or else the pipe will
* not close when the child process exits and any calls to ReadFile
* will hang.
*/
if (!CloseHandle(hOutputWrite)){
DEBUGMSGTL(("util_funcs","get_exec_output CloseHandle hOutputWrite: %lu\n",
GetLastError()));
return -1;
}
if (!CloseHandle(hErrorWrite)) {
DEBUGMSGTL(("util_funcs","get_exec_output CloseHandle hErrorWrite: %lu\n",
GetLastError()));
return -1;
}
return fd;
#endif /* WIN32 */
#endif /* HAVE_EXEC */
#endif /* !defined(USING_UTILITIES_EXECUTE_MODULE) */
return -1;
}
int
get_exec_pipes(char *cmd, int *fdIn, int *fdOut, netsnmp_pid_t *pid)
{
/* Alexander Prömel, alexander@proemel.de 08/24/2006
The following code, is tested on picotux rev. 1.01.
I think, it will be better to put the named pipes, into /var/run or make it selectable via CONFIG file.
If the pipe file already exist, the creation will fail.
I put the pipes into /flash, the pipepath has to change in ucd-snmp/pass_persist.c too, if you change it here.
*/
#if HAVE_EXECV
#ifdef __uClinux__ /* HAVE uClinux */
int in,out;
char fifo_in_path[256];
char fifo_out_path[256];
pid_t tpid;
if ((tpid = vfork()) == 0) { /*temp child*/
execve(cmd, NULL,NULL);
perror(cmd);
exit(1);
} else {
if(tpid > 0) {
/*initialize workspace*/
snprintf(fifo_in_path, 256, "/flash/cp_%d", tpid);
snprintf(fifo_out_path, 256, "/flash/pc_%d", tpid);
in = mkfifo(fifo_in_path, S_IRWXU); /*Create Input Pipe, 700*/
if ( in ) {
perror("parent: inpipe");
exit(0);
}
out = mkfifo(fifo_out_path, S_IRWXU); /*Create Output Pipe, 700*/
if ( out ) {
perror("parent: outpipe");
exit(0);
}
in = open(fifo_in_path,O_RDONLY); /*open the Input Pipe read Only*/
if(in < 0) {
perror("parent: input");
exit(0);
}
out = open(fifo_out_path,O_WRONLY); /*open the Output Pipe write Only*/
if(out < 0) {
perror("parent: output");
exit(0);
}
*fdIn = in; /*read*/
*fdOut = out; /*write*/
*pid = tpid;
return (1); /* We are returning 0 for error... */
} else { /*pid < 0*/
setPerrorstatus("vfork");
return 0;
}
}
#else /*HAVE x86*/
int fd[2][2], i, cnt;
char ctmp[STRMAX], *cptr1, *cptr2, argvs[STRMAX], **argv,
**aptr;
/*
* Setup our pipes
*/
if (pipe(fd[0]) || pipe(fd[1])) {
setPerrorstatus("pipe");
return 0;
}
if ((*pid = fork()) == 0) { /* First handle for the child */
close(fd[0][1]);
close(fd[1][0]);
close(0);
if (dup(fd[0][0]) != 0) {
setPerrorstatus("dup 0");
return 0;
}
close(fd[0][0]);
close(1);
if (dup(fd[1][1]) != 1) {
setPerrorstatus("dup 1");
return 0;
}
close(fd[1][1]);
/*
* write standard output and standard error to pipe.
*/
/*
* close all non-standard open file descriptors
*/
netsnmp_close_fds(1);
(void) dup(1); /* stderr */
for (cnt = 1, cptr1 = cmd, cptr2 = argvs; *cptr1 != 0;
cptr2++, cptr1++) {
*cptr2 = *cptr1;
if (*cptr1 == ' ') {
*(cptr2++) = 0;
if ((cptr1 = skip_white(cptr1)) == NULL)
break;
*cptr2 = *cptr1;
if (*cptr1 != 0)
cnt++;
}
}
*cptr2 = 0;
*(cptr2 + 1) = 0;
argv = (char **) malloc((cnt + 2) * sizeof(char *));
if (argv == NULL)
return 0; /* memory alloc error */
aptr = argv;
*(aptr++) = argvs;
for (cptr2 = argvs, i = 1; i != cnt; cptr2++)
if (*cptr2 == 0) {
*(aptr++) = cptr2 + 1;
i++;
}
while (*cptr2 != 0)
cptr2++;
*(aptr++) = NULL;
copy_nword(cmd, ctmp, sizeof(ctmp));
execv(ctmp, argv);
perror(ctmp);
exit(1);
} else {
close(fd[0][0]);
close(fd[1][1]);
if (*pid < 0) {
close(fd[0][1]);
close(fd[1][0]);
setPerrorstatus("fork");
return 0;
}
*fdIn = fd[1][0];
*fdOut = fd[0][1];
return (1); /* We are returning 0 for error... */
}
#endif /* uClinux or x86 */
#endif /* !HAVE_EXECV */
#if defined(WIN32) && !defined (mingw32) && !defined(HAVE_EXECV)
/* MSVC (MinGW not working but should use this code). Cygwin already works as it has execv and fork */
/* Reference: MS tech note: 190351 */
HANDLE hInputWriteTmp, hInputRead, hInputWrite = NULL;
HANDLE hOutputReadTmp, hOutputRead, hOutputWrite = NULL;
HANDLE hErrorWrite;
SECURITY_ATTRIBUTES sa;
PROCESS_INFORMATION pi;
STARTUPINFO si;
sa.nLength= sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = TRUE;
/* Child temporary output pipe with Inheritance on (sa.bInheritHandle is true) */
if (!CreatePipe(&hOutputReadTmp,&hOutputWrite,&sa,0)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes CreatePipe ChildOut: %d\n",
GetLastError()));
return 0;
}
/* Child temporary input pipe with Inheritance on (sa.bInheritHandle is true) */
if (!CreatePipe(&hInputRead,&hInputWriteTmp,&sa,0)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes CreatePipe ChildIn: %d\n", GetLastError()));
return 0;
}
/* Copy the stdout handle to the stderr handle in case the child closes one of
* its stdout handles. */
if (!DuplicateHandle(GetCurrentProcess(),hOutputWrite, GetCurrentProcess(),
&hErrorWrite,0, TRUE,DUPLICATE_SAME_ACCESS)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes DuplicateHandle: %d\n", GetLastError()));
return 0;
}
/* Create new copies of the input and output handles but set bInheritHandle to
* FALSE so the new handle can not be inherited. Otherwise the handles can not
* be closed. */
if (!DuplicateHandle(GetCurrentProcess(), hOutputReadTmp, GetCurrentProcess(),
&hOutputRead, 0, FALSE, DUPLICATE_SAME_ACCESS)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes DupliateHandle ChildOut: %d\n", GetLastError()));
CloseHandle(hErrorWrite);
return 0;
}
if (!DuplicateHandle(GetCurrentProcess(),hInputWriteTmp,
GetCurrentProcess(), &hInputWrite, 0, FALSE, DUPLICATE_SAME_ACCESS)) {
DEBUGMSGTL(("util_funcs","get_exec_pipes DupliateHandle ChildIn: %d\n", GetLastError()));
CloseHandle(hErrorWrite);
CloseHandle(hOutputRead);
return 0;
}
/* Close the temporary output and input handles */
if (!CloseHandle(hOutputReadTmp)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes CloseHandle (hOutputReadTmp): %d\n", GetLastError()));
CloseHandle(hErrorWrite);
CloseHandle(hOutputRead);
CloseHandle(hInputWrite);
return 0;
}
if (!CloseHandle(hInputWriteTmp)) {
DEBUGMSGTL(("util_funcs", "get_exec_pipes CloseHandle (hInputWriteTmp): %d\n", GetLastError()));
CloseHandle(hErrorWrite);
CloseHandle(hOutputRead);
CloseHandle(hInputWrite);
return 0;
}
/* Associates a C run-time file descriptor with an existing operating-system file handle. */
*fdIn = _open_osfhandle((intptr_t) hOutputRead, 0);
*fdOut = _open_osfhandle((intptr_t) hInputWrite, 0);
/* Set up STARTUPINFO for CreateProcess with the handles and have it hide the window
* for the new process. */
ZeroMemory(&si,sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
si.hStdOutput = hOutputWrite;
si.hStdInput = hInputRead;
si.hStdError = hErrorWrite;
si.wShowWindow = SW_HIDE;
/* Launch the process that you want to redirect. Example snmpd.conf pass_persist:
* pass_persist .1.3.6.1.4.1.2021.255 c:/perl/bin/perl c:/temp/pass_persisttest
*/
if (!CreateProcess(NULL, cmd, NULL, NULL, TRUE, CREATE_NEW_CONSOLE, NULL, NULL, &si, &pi)) {
DEBUGMSGTL(("util_funcs","get_exec_pipes CreateProcess:'%s' %d\n",cmd, GetLastError()));
CloseHandle(hErrorWrite);
CloseHandle(hOutputRead);
CloseHandle(hInputWrite);
return 0;
}
DEBUGMSGTL(("util_funcs","child hProcess (stored in pid): %p\n", pi.hProcess));
DEBUGMSGTL(("util_funcs","child dwProcessId (task manager): %d\n",(int)pi.dwProcessId));
/* Set global child process handle */
*pid = pi.hProcess;
/* Cleanup */
if (!CloseHandle(pi.hThread))
DEBUGMSGTL(("util_funcs","get_exec_pipes CloseHandle pi.hThread: %d\n",cmd));
/* Close pipe handles to make sure that no handles to the write end of the
* output pipe are maintained in this process or else the pipe will
* not close when the child process exits and any calls to ReadFile
* will hang.
*/
if (!CloseHandle(hOutputWrite)){
DEBUGMSGTL(("util_funcs","get_exec_pipes CloseHandle hOutputWrite: %d\n",cmd, GetLastError()));
return 0;
}
if (!CloseHandle(hInputRead)) {
DEBUGMSGTL(("util_funcs","get_exec_pipes CloseHandle hInputRead: %d\n",cmd, GetLastError()));
return 0;
}
if (!CloseHandle(hErrorWrite)) {
DEBUGMSGTL(("util_funcs","get_exec_pipes CloseHandle hErrorWrite: %d\n",cmd, GetLastError()));
return 0;
}
return 1;
#endif /* WIN32 */
return 0;
}
#ifndef NETSNMP_FEATURE_REMOVE_CLEAR_CACHE
int
clear_cache(int action,
u_char * var_val,
u_char var_val_type,
size_t var_val_len,
u_char * statP, oid * name, size_t name_len)
{
if (var_val_type != ASN_INTEGER) {
snmp_log(LOG_NOTICE, "Wrong type != int\n");
return SNMP_ERR_WRONGTYPE;
}
#if defined(NETSNMP_EXCACHETIME) && defined(USING_UTILITIES_EXECUTE_MODULE) && defined(HAVE_EXECV)
else {
long tmp = 0;
tmp = *((long *) var_val);
if (tmp == 1 && action == COMMIT) {
cachetime = 0; /* reset the cache next read */
}
}
#endif
return SNMP_ERR_NOERROR;
}
#endif /* NETSNMP_FEATURE_REMOVE_CLEAR_CACHE */
void
print_mib_oid(oid name[], size_t len)
{
char *buffer;
buffer = (char *) malloc(11 * len); /* maximum digit lengths for int32 + a '.' */
if (!buffer) {
snmp_log(LOG_ERR, "Malloc failed - out of memory?");
return;
}
sprint_mib_oid(buffer, name, len);
snmp_log(LOG_NOTICE, "Mib: %s\n", buffer);
free(buffer);
}
void
sprint_mib_oid(char *buf, const oid *name, size_t len)
{
int i;
for (i = 0; i < (int) len; i++)
buf += sprintf(buf, ".%" NETSNMP_PRIo "u", name[i]);
}
/*
* checkmib(): provided for backwards compatibility, do not use:
*/
int
checkmib(struct variable *vp, oid * name, size_t * length,
int exact, size_t * var_len, WriteMethod ** write_method, int max)
{
/*
* checkmib used to be header_simple_table, with reveresed boolean
* return output. header_simple_table() was created to match
* header_generic().
*/
return (!header_simple_table(vp, name, length, exact, var_len,
write_method, max));
}
#ifndef NETSNMP_FEATURE_REMOVE_FIND_FIELD
char *
find_field(char *ptr, int field)
{
int i;
char *init = ptr;
if (field == NETSNMP_LASTFIELD) {
/*
* skip to end
*/
while (*ptr++);
ptr = ptr - 2;
/*
* rewind a field length
*/
while (*ptr != 0 && isspace((unsigned char)(*ptr)) && init <= ptr)
ptr--;
while (*ptr != 0 && !isspace((unsigned char)(*ptr)) && init <= ptr)
ptr--;
if (isspace((unsigned char)(*ptr)))
ptr++; /* past space */
if (ptr < init)
ptr = init;
if (!isspace((unsigned char)(*ptr)) && *ptr != 0)
return (ptr);
} else {
if ((ptr = skip_white(ptr)) == NULL)
return (NULL);
for (i = 1; *ptr != 0 && i != field; i++) {
if ((ptr = skip_not_white(ptr)) == NULL)
return (NULL);
if ((ptr = skip_white(ptr)) == NULL)
return (NULL);
}
if (*ptr != 0 && i == field)
return (ptr);
return (NULL);
}
return (NULL);
}
#endif /* NETSNMP_FEATURE_REMOVE_FIND_FIELD */
#ifndef NETSNMP_FEATURE_REMOVE_PARSE_MIBOID
int
parse_miboid(const char *buf, oid * oidout)
{
int i;
if (!buf)
return 0;
if (*buf == '.')
buf++;
for (i = 0; isdigit((unsigned char)(*buf)); i++) {
/* Subidentifiers are unsigned values, up to 2^32-1
* so we need to use 'strtoul' rather than 'atoi'
*/
oidout[i] = strtoul(buf, NULL, 10) & 0xffffffff;
while (isdigit((unsigned char)(*buf))) buf++;
if (*buf == '.')
buf++;
}
/*
* oidout[i] = -1; hmmm
*/
return i;
}
#endif /* NETSNMP_FEATURE_REMOVE_PARSE_MIBOID */
#ifndef NETSNMP_FEATURE_REMOVE_STRING_APPEND_INT
void
string_append_int(char *s, int val)
{
char textVal[16];
if (val < 10) {
*s++ = '0' + val;
*s = '\0';
return;
}
sprintf(textVal, "%d", val);
strcpy(s, textVal);
return;
}
#endif /* NETSNMP_FEATURE_REMOVE_STRING_APPEND_INT */
#ifndef NETSNMP_FEATURE_REMOVE_INTERNAL_MIB_TABLE
struct internal_mib_table {
int max_size; /* Size of the current data table */
int next_index; /* Index of the next free entry */
int current_index; /* Index of the 'current' entry */
int cache_timeout;
marker_t cache_markerM;
RELOAD *reload; /* Routine to read in the data */
COMPARE *compare; /* Routine to compare two entries */
int data_size; /* Size of an individual entry */
void *data; /* The table itself */
};
mib_table_t
Initialise_Table(int size, int timeout, RELOAD *reload, COMPARE *compare)
{
struct internal_mib_table *t;
t = (struct internal_mib_table *)
malloc(sizeof(struct internal_mib_table));
if (t == NULL)
return NULL;
t->max_size = 0;
t->next_index = 1; /* Don't use index 0 */
t->current_index = 1;
t->cache_timeout = timeout;
t->cache_markerM = NULL;
t->reload = reload;
t->compare = compare;
t->data_size = size;
t->data = NULL;
return (mib_table_t) t;
}
#define TABLE_ADD( x, y ) ((void*)((char*)(x) + y))
#define TABLE_INDEX(t, i) (TABLE_ADD(t->data, i * t->data_size))
#define TABLE_START(t) (TABLE_INDEX(t, 1))
#define TABLE_NEXT(t) (TABLE_INDEX(t, t->next_index))
#define TABLE_CURRENT(t) (TABLE_INDEX(t, t->current_index))
int
check_and_reload_table(struct internal_mib_table *table)
{
/*
* If the saved data is fairly recent,
* we don't need to reload it
*/
if (table->cache_markerM &&
!(netsnmp_ready_monotonic(table->cache_markerM,
table->cache_timeout * 1000)))
return 1;
/*
* Call the routine provided to read in the data
*
* N.B: Update the cache marker *before* calling
* this routine, to avoid problems with recursion
*/
netsnmp_set_monotonic_marker(&table->cache_markerM);
table->next_index = 1;
if (table->reload((mib_table_t) table) < 0) {
free(table->cache_markerM);
table->cache_markerM = NULL;
return 0;
}
table->current_index = 1;
if (table->compare != NULL) /* Sort the table */
qsort(TABLE_START(table), table->next_index-1,
table->data_size, table->compare);
return 1;
}
int
Search_Table(mib_table_t t, void *entry, int exact)
{
struct internal_mib_table *table = (struct internal_mib_table *) t;
void *entry2;
int res;
if (!check_and_reload_table(table))
return -1;
if (table->compare == NULL) {
/*
* XXX - not sure this is right ?
*/
memcpy(entry, table->data, table->data_size);
return 0;
}
if (table->next_index == table->current_index)
table->current_index = 1;
entry2 = TABLE_CURRENT(table);
res = table->compare(entry, entry2);
if ((res < 0) && (table->current_index != 1)) {
table->current_index = 1;
entry2 = TABLE_CURRENT(table);
res = table->compare(entry, entry2);
}
while (res > 0) {
table->current_index++;
if (table->next_index == table->current_index)
return -1;
entry2 = TABLE_CURRENT(table);
res = table->compare(entry, entry2);
}
if (exact && res != 0)
return -1;
if (!exact && res == 0) {
table->current_index++;
if (table->next_index == table->current_index)
return -1;
entry2 = TABLE_CURRENT(table);
}
memcpy(entry, entry2, table->data_size);
return 0;
}
int
Add_Entry(mib_table_t t, void *entry)
{
struct internal_mib_table *table = (struct internal_mib_table *) t;
int new_max;
void *new_data; /* Used for
* a) extending the data table
* b) the next entry to use
*/
if (table->max_size <= table->next_index) {
/*
* Table is full, so extend it to double the size
*/
new_max = 2 * table->max_size;
if (new_max == 0)
new_max = 10; /* Start with 10 entries */
new_data = (void *) malloc(new_max * table->data_size);
if (new_data == NULL)
return -1;
if (table->data) {
memcpy(new_data, table->data,
table->max_size * table->data_size);
free(table->data);
}
table->data = new_data;
table->max_size = new_max;
}
/*
* Insert the new entry into the data array
*/
new_data = TABLE_NEXT(table);
memcpy(new_data, entry, table->data_size);
table->next_index++;
return 0;
}
void *
Retrieve_Table_Data(mib_table_t t, int *max_idx)
{
struct internal_mib_table *table = (struct internal_mib_table *) t;
if (!check_and_reload_table(table))
return NULL;
*max_idx = table->next_index - 1;
return table->data;
}
#endif /* NETSNMP_FEATURE_REMOVE_INTERNAL_MIB_TABLE */
#if defined(HAVE_LINUX_RTNETLINK_H)
#ifndef NETSNMP_FEATURE_REMOVE_CREATE_PREFIX_INFO
prefix_cbx *net_snmp_create_prefix_info(unsigned long OnLinkFlag,
unsigned long AutonomousFlag,
char *in6ptr)
{
prefix_cbx *node = SNMP_MALLOC_TYPEDEF(prefix_cbx);
if(!in6ptr) {
free(node);
return NULL;
}
if(!node) {
free(node);
return NULL;
}
node->next_info = NULL;
node->ipAddressPrefixOnLinkFlag = OnLinkFlag;
node->ipAddressPrefixAutonomousFlag = AutonomousFlag;
memcpy(node->in6p, in6ptr, sizeof(node->in6p));
return node;
}
#endif /* NETSNMP_FEATURE_REMOVE_CREATE_PREFIX_INFO */
#ifndef NETSNMP_FEATURE_REMOVE_FIND_PREFIX_INFO
int net_snmp_find_prefix_info(prefix_cbx **head,
char *address,
prefix_cbx *node_to_find)
{
int iret;
memset(node_to_find, 0, sizeof(prefix_cbx));
if(!*head)
return -1;
memcpy(node_to_find->in6p, address, sizeof(node_to_find->in6p));
iret = net_snmp_search_update_prefix_info(head, node_to_find, 1);
if(iret < 0) {
DEBUGMSGTL(("util_funcs:prefix", "Unable to search the list\n"));
return -1;
} else if (!iret) {
DEBUGMSGTL(("util_funcs:prefix", "Could not find prefix info\n"));
return -1;
} else
return 0;
}
#endif /* NETSNMP_FEATURE_REMOVE_FIND_PREFIX_INFO */
#ifndef NETSNMP_FEATURE_REMOVE_UPDATE_PREFIX_INFO
int net_snmp_update_prefix_info(prefix_cbx **head,
prefix_cbx *node_to_update)
{
int iret;
iret = net_snmp_search_update_prefix_info(head, node_to_update, 0);
if(iret < 0) {
DEBUGMSGTL(("util_funcs:prefix", "Unable to update prefix info\n"));
return -1;
} else if (!iret) {
DEBUGMSGTL(("util_funcs:prefix", "Unable to find the node to update\n"));
return -1;
} else
return 0;
}
#endif /* NETSNMP_FEATURE_REMOVE_UPDATE_PREFIX_INFO */
int net_snmp_search_update_prefix_info(prefix_cbx **head,
prefix_cbx *node_to_use,
int functionality)
{
/* We define functionality based on need *
* 0 - Need to do a search and update. We have to provide the node_to_use structure filled fully *
* 1 - Need to do only search. Provide the node_to_use with in6p value filled */
prefix_cbx *temp_node;
netsnmp_assert(NULL != head);
netsnmp_assert(NULL != node_to_use);
if(functionality > 1)
return -1;
if(!node_to_use)
return -1;
if (!functionality) {
if (!*head) {
*head = node_to_use;
return 1;
}
for (temp_node = *head; temp_node->next_info != NULL ; temp_node = temp_node->next_info) {
if (0 == strcmp(temp_node->in6p, node_to_use->in6p)) {
temp_node->ipAddressPrefixOnLinkFlag = node_to_use->ipAddressPrefixOnLinkFlag;
temp_node->ipAddressPrefixAutonomousFlag = node_to_use->ipAddressPrefixAutonomousFlag;
return 2;
}
}
temp_node->next_info = node_to_use;
return 1;
} else {
for (temp_node = *head; temp_node != NULL ; temp_node = temp_node->next_info) {
if (0 == strcmp(temp_node->in6p, node_to_use->in6p)) {
/*need yo put sem here as i read here */
node_to_use->ipAddressPrefixOnLinkFlag = temp_node->ipAddressPrefixOnLinkFlag;
node_to_use->ipAddressPrefixAutonomousFlag = temp_node->ipAddressPrefixAutonomousFlag;
return 1;
}
}
return 0;
}
}
#ifndef NETSNMP_FEATURE_REMOVE_DELETE_PREFIX_INFO
int net_snmp_delete_prefix_info(prefix_cbx **head,
char *address)
{
prefix_cbx *temp_node,*prev_node;
if(!address)
return -1;
if(!head)
return -1;
for (temp_node = *head, prev_node = NULL; temp_node;
prev_node = temp_node, temp_node = temp_node->next_info) {
if (temp_node->in6p && strcmp(temp_node->in6p, address) == 0) {
if (prev_node)
prev_node->next_info = temp_node->next_info;
else
*head = temp_node->next_info;
free(temp_node);
return 1;
}
}
return 0;
}
#endif /* NETSNMP_FEATURE_REMOVE_DELETE_PREFIX_INFO */
#endif /* HAVE_LINUX_RTNETLINK_H */
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