void init_master(void)
{
struct snmp_session sess, *session;
if ( ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_ROLE) != MASTER_AGENT )
return;
DEBUGMSGTL(("agentx/master","initializing...\n"));
snmp_sess_init( &sess );
sess.version = AGENTX_VERSION_1;
sess.flags |= SNMP_FLAGS_STREAM_SOCKET;
if ( ds_get_string(DS_APPLICATION_ID, DS_AGENT_X_SOCKET) )
sess.peername = strdup(ds_get_string(DS_APPLICATION_ID, DS_AGENT_X_SOCKET));
else
sess.peername = strdup(AGENTX_SOCKET);
if ( sess.peername[0] == '/' ) {
/*
* If this is a Unix pathname,
* try and create the directory first.
*/
if (mkdirhier(sess.peername, AGENT_DIRECTORY_MODE, 1)) {
snmp_log(LOG_ERR,
"Failed to create the directory for the agentX socket: %s\n",
sess.peername);
}
}
/*
* Otherwise, let 'snmp_open' interpret the string.
*/
sess.local_port = AGENTX_PORT; /* Indicate server & set default port */
sess.remote_port = 0;
sess.callback = handle_master_agentx_packet;
session = snmp_open_ex( &sess, 0, agentx_parse, 0, agentx_build,
agentx_check_packet );
if ( session == NULL && sess.s_errno == EADDRINUSE ) {
/*
* Could be a left-over socket (now deleted)
* Try again
*/
session = snmp_open_ex( &sess, 0, agentx_parse, 0, agentx_build,
agentx_check_packet );
}
if ( session == NULL ) {
/* diagnose snmp_open errors with the input struct snmp_session pointer */
snmp_sess_perror("init_master", &sess);
if (!ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_NO_ROOT_ACCESS))
exit(1);
}
DEBUGMSGTL(("agentx/master","initializing... DONE\n"));
}
void
read_configs (void)
{
char *optional_config = ds_get_string(DS_LIBRARY_ID, DS_LIB_OPTIONALCONFIG);
char *type = ds_get_string(DS_LIBRARY_ID, DS_LIB_APPTYPE);
DEBUGMSGTL(("read_config","reading normal configuration tokens\n"));
if (!ds_get_boolean(DS_LIBRARY_ID, DS_LIB_DONT_READ_CONFIGS))
read_config_files(NORMAL_CONFIG);
/* do this even when the normal above wasn't done */
if (optional_config && type)
read_config_with_type(optional_config, type);
snmp_call_callbacks(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_POST_READ_CONFIG,
NULL);
}
void
unregister_config_handler(const char *type_param,
const char *token)
{
struct config_files **ctmp = &config_files;
struct config_line **ltmp, *ltmp2;
const char *type = type_param;
if ( type == NULL )
type = ds_get_string(DS_LIBRARY_ID, DS_LIB_APPTYPE);
/* find type in current list */
while (*ctmp != NULL && strcmp((*ctmp)->fileHeader,type)) {
ctmp = &((*ctmp)->next);
}
if (*ctmp == NULL) {
/* Not found, return. */
return;
}
ltmp = &((*ctmp)->start);
if (*ltmp == NULL) {
/* Not found, return. */
return;
}
if (strcmp((*ltmp)->config_token,token) == 0) {
/* found it at the top of the list */
(*ctmp)->start = (*ltmp)->next;
free((*ltmp)->config_token);
SNMP_FREE((*ltmp)->help);
free(*ltmp);
return;
}
while ((*ltmp)->next != NULL && strcmp((*ltmp)->next->config_token,token)) {
ltmp = &((*ltmp)->next);
}
if (*ltmp == NULL) {
free((*ltmp)->config_token);
SNMP_FREE((*ltmp)->help);
ltmp2 = (*ltmp)->next->next;
free((*ltmp)->next);
(*ltmp)->next = ltmp2;
}
}
int
snmp_parse_args(int argc,
char *const *argv,
netsnmp_session * session, const char *localOpts,
void (*proc) (int, char *const *, int))
{
int arg;
char *cp;
char *Apsz = NULL;
char *Xpsz = NULL;
char *Cpsz = NULL;
char Opts[BUF_SIZE];
/*
* initialize session to default values
*/
snmp_sess_init(session);
strcpy(Opts, "Y:VhHm:M:O:I:P:D:dv:r:t:c:Z:e:E:n:u:l:x:X:a:A:p:T:-:3:");
if (localOpts)
strcat(Opts, localOpts);
/*
* get the options
*/
DEBUGMSGTL(("snmp_parse_args", "starting: %d/%d\n", optind, argc));
for (arg = 0; arg < argc; arg++) {
DEBUGMSGTL(("snmp_parse_args", " arg %d = %s\n", arg, argv[arg]));
}
optind = 1;
while ((arg = getopt(argc, argv, Opts)) != EOF) {
DEBUGMSGTL(("snmp_parse_args", "handling (#%d): %c\n", optind,
arg));
switch (arg) {
case '-':
if (strcasecmp(optarg, "help") == 0) {
return (-1);
}
if (strcasecmp(optarg, "version") == 0) {
fprintf(stderr, "NET-SNMP version: %s\n",
netsnmp_get_version());
return (-2);
}
handle_long_opt(optarg);
break;
case 'V':
fprintf(stderr, "NET-SNMP version: %s\n",
netsnmp_get_version());
return (-2);
case 'h':
return (-1);
break;
case 'H':
init_snmp("snmpapp");
fprintf(stderr, "Configuration directives understood:\n");
read_config_print_usage(" ");
return (-2);
case 'Y':
netsnmp_config_remember(optarg);
break;
case 'm':
setenv("MIBS", optarg, 1);
break;
case 'M':
setenv("MIBDIRS", optarg, 1);
break;
case 'O':
cp = snmp_out_toggle_options(optarg);
if (cp != NULL) {
fprintf(stderr,
"Unknown output option passed to -O: %c.\n", *cp);
return (-1);
}
break;
case 'I':
cp = snmp_in_toggle_options(optarg);
if (cp != NULL) {
fprintf(stderr, "Unknown input option passed to -I: %c.\n",
*cp);
return (-1);
}
break;
case 'P':
cp = snmp_mib_toggle_options(optarg);
if (cp != NULL) {
fprintf(stderr,
"Unknown parsing option passed to -P: %c.\n", *cp);
return (-1);
}
break;
case 'D':
debug_register_tokens(optarg);
snmp_set_do_debugging(1);
break;
case 'd':
ds_set_boolean(DS_LIBRARY_ID, DS_LIB_DUMP_PACKET, 1);
break;
case 'v':
if (!strcmp(optarg, "1")) {
session->version = SNMP_VERSION_1;
} else if (!strcasecmp(optarg, "2c")) {
session->version = SNMP_VERSION_2c;
} else if (!strcasecmp(optarg, "3")) {
session->version = SNMP_VERSION_3;
} else {
fprintf(stderr,
"Invalid version specified after -v flag: %s\n",
optarg);
return (-1);
}
break;
case 'p':
fprintf(stderr, "Warning: -p option is no longer used - ");
fprintf(stderr, "specify the remote host as HOST:PORT\n");
return (-1);
break;
case 'T':
fprintf(stderr, "Warning: -T option is no longer used - ");
fprintf(stderr, "specify the remote host as TRANSPORT:HOST\n");
return (-1);
break;
case 't':
session->timeout = atoi(optarg) * 1000000L;
if (session->timeout < 0 || !isdigit(optarg[0])) {
fprintf(stderr,
"Invalid timeout in seconds after -t flag.\n");
return (-1);
}
break;
case 'r':
session->retries = atoi(optarg);
if (session->retries < 0 || !isdigit(optarg[0])) {
fprintf(stderr,
"Invalid number of retries after -r flag.\n");
return (-1);
}
break;
case 'c':
Cpsz = optarg;
break;
case '3':
if (snmpv3_options(optarg, session, &Apsz, &Xpsz, argc, argv) <
0) {
return (-1);
}
break;
#define SNMPV3_CMD_OPTIONS
#ifdef SNMPV3_CMD_OPTIONS
case 'Z':
session->engineBoots = strtoul(optarg, NULL, 10);
if (session->engineBoots == 0 || !isdigit(optarg[0])) {
fprintf(stderr,
"Need engine boots value after -Z flag.\n");
return (-1);
}
cp = strchr(optarg, ',');
if (cp && *(++cp) && isdigit(*cp))
session->engineTime = strtoul(cp, NULL, 10);
/*
* Handle previous '-Z boot time' syntax
*/
else if ((optind < argc) && isdigit(argv[optind][0]))
session->engineTime = strtoul(argv[optind], NULL, 10);
else {
fprintf(stderr, "Need engine time value after -Z flag.\n");
return (-1);
}
break;
case 'e':{
size_t ebuf_len = 32, eout_len = 0;
u_char *ebuf = (u_char *) malloc(ebuf_len);
if (ebuf == NULL) {
fprintf(stderr,
"malloc failure processing -e flag.\n");
return (-1);
}
if (!snmp_hex_to_binary
(&ebuf, &ebuf_len, &eout_len, 1, optarg)) {
fprintf(stderr,
"Bad engine ID value after -e flag.\n");
free(ebuf);
return (-1);
}
session->securityEngineID = ebuf;
session->securityEngineIDLen = eout_len;
break;
}
case 'E':{
size_t ebuf_len = 32, eout_len = 0;
u_char *ebuf = (u_char *) malloc(ebuf_len);
if (ebuf == NULL) {
fprintf(stderr,
"malloc failure processing -E flag.\n");
return (-1);
}
if (!snmp_hex_to_binary
(&ebuf, &ebuf_len, &eout_len, 1, optarg)) {
fprintf(stderr,
"Bad engine ID value after -E flag.\n");
free(ebuf);
return (-1);
}
session->contextEngineID = ebuf;
session->contextEngineIDLen = eout_len;
break;
}
case 'n':
session->contextName = optarg;
session->contextNameLen = strlen(optarg);
break;
case 'u':
session->securityName = optarg;
session->securityNameLen = strlen(optarg);
break;
case 'l':
if (!strcasecmp(optarg, "noAuthNoPriv") || !strcmp(optarg, "1")
|| !strcasecmp(optarg, "nanp")) {
session->securityLevel = SNMP_SEC_LEVEL_NOAUTH;
} else if (!strcasecmp(optarg, "authNoPriv")
|| !strcmp(optarg, "2")
|| !strcasecmp(optarg, "anp")) {
session->securityLevel = SNMP_SEC_LEVEL_AUTHNOPRIV;
} else if (!strcasecmp(optarg, "authPriv")
|| !strcmp(optarg, "3")
|| !strcasecmp(optarg, "ap")) {
session->securityLevel = SNMP_SEC_LEVEL_AUTHPRIV;
} else {
fprintf(stderr,
"Invalid security level specified after -l flag: %s\n",
optarg);
return (-1);
}
break;
case 'a':
if (!strcasecmp(optarg, "MD5")) {
session->securityAuthProto = usmHMACMD5AuthProtocol;
session->securityAuthProtoLen = USM_AUTH_PROTO_MD5_LEN;
} else if (!strcasecmp(optarg, "SHA")) {
session->securityAuthProto = usmHMACSHA1AuthProtocol;
session->securityAuthProtoLen = USM_AUTH_PROTO_SHA_LEN;
} else {
fprintf(stderr,
"Invalid authentication protocol specified after -a flag: %s\n",
optarg);
return (-1);
}
break;
case 'x':
if (!strcasecmp(optarg, "DES")) {
session->securityPrivProto = usmDESPrivProtocol;
session->securityPrivProtoLen = USM_PRIV_PROTO_DES_LEN;
} else {
fprintf(stderr,
"Invalid privacy protocol specified after -x flag: %s\n",
optarg);
return (-1);
}
break;
case 'A':
Apsz = optarg;
break;
case 'X':
Xpsz = optarg;
break;
#endif /* SNMPV3_CMD_OPTIONS */
case '?':
return (-1);
break;
default:
proc(argc, argv, arg);
break;
}
}
DEBUGMSGTL(("snmp_parse_args", "finished: %d/%d\n", optind, argc));
/*
* read in MIB database and initialize the snmp library
*/
init_snmp("snmpapp");
/*
* session default version
*/
if (session->version == SNMP_DEFAULT_VERSION) {
/*
* run time default version
*/
session->version = ds_get_int(DS_LIBRARY_ID, DS_LIB_SNMPVERSION);
/*
* compile time default version
*/
if (!session->version) {
switch (SNMP_DEFAULT_VERSION) {
case 1:
session->version = SNMP_VERSION_1;
break;
case 2:
session->version = SNMP_VERSION_2c;
break;
case 3:
session->version = SNMP_VERSION_3;
break;
}
} else {
if (session->version == DS_SNMP_VERSION_1) /* bogus value. version 1 actually = 0 */
session->version = SNMP_VERSION_1;
}
}
/*
* make master key from pass phrases
*/
if (Apsz) {
session->securityAuthKeyLen = USM_AUTH_KU_LEN;
if (session->securityAuthProto == NULL) {
/*
* get .conf set default
*/
const oid *def =
get_default_authtype(&session->securityAuthProtoLen);
session->securityAuthProto =
snmp_duplicate_objid(def, session->securityAuthProtoLen);
}
if (session->securityAuthProto == NULL) {
/*
* assume MD5
*/
session->securityAuthProto =
snmp_duplicate_objid(usmHMACMD5AuthProtocol,
USM_AUTH_PROTO_MD5_LEN);
session->securityAuthProtoLen = USM_AUTH_PROTO_MD5_LEN;
}
if (generate_Ku(session->securityAuthProto,
session->securityAuthProtoLen,
(u_char *) Apsz, strlen(Apsz),
session->securityAuthKey,
&session->securityAuthKeyLen) != SNMPERR_SUCCESS) {
snmp_perror(argv[0]);
fprintf(stderr,
"Error generating a key (Ku) from the supplied authentication pass phrase. \n");
return (-2);
}
}
if (Xpsz) {
session->securityPrivKeyLen = USM_PRIV_KU_LEN;
if (session->securityPrivProto == NULL) {
/*
* get .conf set default
*/
const oid *def =
get_default_privtype(&session->securityPrivProtoLen);
session->securityPrivProto =
snmp_duplicate_objid(def, session->securityPrivProtoLen);
}
if (session->securityPrivProto == NULL) {
/*
* assume DES
*/
session->securityPrivProto =
snmp_duplicate_objid(usmDESPrivProtocol,
USM_PRIV_PROTO_DES_LEN);
session->securityPrivProtoLen = USM_PRIV_PROTO_DES_LEN;
}
if (generate_Ku(session->securityAuthProto,
session->securityAuthProtoLen,
(u_char *) Xpsz, strlen(Xpsz),
session->securityPrivKey,
&session->securityPrivKeyLen) != SNMPERR_SUCCESS) {
snmp_perror(argv[0]);
fprintf(stderr,
"Error generating a key (Ku) from the supplied privacy pass phrase. \n");
return (-2);
}
}
/*
* get the hostname
*/
if (optind == argc) {
fprintf(stderr, "No hostname specified.\n");
return (-1);
}
session->peername = argv[optind++]; /* hostname */
/*
* If v1 or v2c, check community has been set, either by a -c option above,
* or via a default token somewhere.
*/
if (session->version == SNMP_VERSION_1 ||
session->version == SNMP_VERSION_2c) {
if (Cpsz == NULL) {
Cpsz = ds_get_string(DS_LIBRARY_ID, DS_LIB_COMMUNITY);
}
if (Cpsz == NULL) {
fprintf(stderr, "No community name specified.\n");
return (-1);
}
session->community = (unsigned char *) Cpsz;
session->community_len = strlen(Cpsz);
}
return optind;
}
void
read_app_config_store(const char *line)
{
read_config_store(ds_get_string(DS_LIBRARY_ID, DS_LIB_APPTYPE), line);
}
/*******************************************************************-o-******
* register_config_handler
*
* Parameters:
* *type
* *token
* *parser
* *releaser
*
* Returns:
* Pointer to a new config line entry -OR- NULL on error.
*/
struct config_line *
register_config_handler(const char *type_param,
const char *token,
void (*parser) (const char *, char *),
void (*releaser) (void),
const char *help)
{
struct config_files **ctmp = &config_files;
struct config_line **ltmp;
const char *type = type_param;
if ( type == NULL )
type = ds_get_string(DS_LIBRARY_ID, DS_LIB_APPTYPE);
/*
* Find type in current list -OR- create a new file type.
*/
while (*ctmp != NULL && strcmp((*ctmp)->fileHeader, type)) {
ctmp = &((*ctmp)->next);
}
if (*ctmp == NULL) {
*ctmp = (struct config_files *)
malloc(sizeof(struct config_files));
if ( !*ctmp ) {
return NULL;
}
(*ctmp)->next = NULL;
(*ctmp)->start = NULL;
(*ctmp)->fileHeader = strdup(type);
}
/*
* Find parser type in current list -OR- create a new
* line parser entry.
*/
ltmp = &((*ctmp)->start);
while (*ltmp != NULL && strcmp((*ltmp)->config_token, token)) {
ltmp = &((*ltmp)->next);
}
if (*ltmp == NULL) {
*ltmp = (struct config_line *)
malloc(sizeof(struct config_line));
if ( !*ltmp ) {
return NULL;
}
(*ltmp)->next = NULL;
(*ltmp)->config_time = NORMAL_CONFIG;
(*ltmp)->parse_line = 0;
(*ltmp)->free_func = 0;
(*ltmp)->config_token = strdup(token);
if (help != NULL)
(*ltmp)->help = strdup(help);
}
/*
* Add/Replace the parse/free functions for the given line type
* in the given file type.
*/
(*ltmp)->parse_line = parser;
(*ltmp)->free_func = releaser;
return (*ltmp);
} /* end register_config_handler() */