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src/usr.bin/snmp/snmpc.c

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/* $OpenBSD: snmpc.c,v 1.41 2024/04/23 13:34:50 jsg Exp $ */
/*
* Copyright (c) 2019 Martijn van Duren <martijn@openbsd.org>
* Copyright (c) 2013 Reyk Floeter <reyk@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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.
*/
#include <sys/limits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <openssl/evp.h>
#include <ber.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <locale.h>
#include <netdb.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include <wchar.h>
#include "smi.h"
#include "snmp.h"
#include "usm.h"
#define GETOPT_COMMON "A:a:c:E:e:K:k:l:n:O:r:t:u:v:X:x:Z:"
int snmpc_get(int, char *[]);
int snmpc_walk(int, char *[]);
int snmpc_set(int, char *[]);
int snmpc_trap(int, char *[]);
int snmpc_df(int, char *[]);
int snmpc_mibtree(int, char *[]);
struct snmp_agent *snmpc_connect(char *, char *);
int snmpc_parseagent(char *, char *);
int snmpc_print(struct ber_element *);
__dead void snmpc_printerror(enum snmp_error, struct ber_element *, int,
const char *);
char *snmpc_hex2bin(char *, size_t *);
ssize_t snmpc_mbswidth(char *);
struct ber_element *snmpc_varbindparse(int, char *[]);
void usage(void);
struct snmp_app {
const char *name;
const int usecommonopt;
const char *optstring;
const char *usage;
int (*exec)(int, char *[]);
};
struct snmp_app snmp_apps[] = {
{ "get", 1, NULL, "agent oid ...", snmpc_get },
{ "getnext", 1, NULL, "agent oid ...", snmpc_get },
{ "walk", 1, "C:", "[-C cIipt] [-C E endoid] [-C s skipoid] agent [oid]", snmpc_walk },
{ "bulkget", 1, "C:", "[-C n<nonrep>r<maxrep>] agent oid ...", snmpc_get },
{ "bulkwalk", 1, "C:", "[-C cipn<nonrep>r<maxrep>] [-C s skipoid] agent [oid]", snmpc_walk },
{ "set", 1, NULL, "agent oid type value [oid type value] ...", snmpc_set },
{ "trap", 1, NULL, "agent uptime oid [oid type value] ...", snmpc_trap },
{ "df", 1, "C:", "[-Ch] [-Cr<maxrep>] agent", snmpc_df },
{ "mibtree", 0, "O:", "[-O fnS] [oid ...]", snmpc_mibtree }
};
struct snmp_app *snmp_app = NULL;
char *community = NULL;
struct snmp_v3 *v3;
char *mib = "mib_2";
int retries = 5;
int timeout = 1;
enum snmp_version version = SNMP_V3;
int print_equals = 1;
int print_varbind_only = 0;
int print_summary = 0;
int print_time = 0;
int print_human = 0;
int walk_check_increase = 1;
int walk_fallback_oid = 1;
int walk_include_oid = 0;
int smi_print_hint = 1;
int non_repeaters = 0;
int max_repetitions = 10;
struct ber_oid walk_end = {{0}, 0};
struct ber_oid *walk_skip = NULL;
size_t walk_skip_len = 0;
enum smi_oid_lookup oid_lookup = smi_oidl_short;
enum smi_output_string output_string = smi_os_default;
int utf8 = 0;
int
main(int argc, char *argv[])
{
const EVP_MD *md = NULL;
const EVP_CIPHER *cipher = NULL;
struct snmp_sec *sec;
char *user = NULL;
enum usm_key_level authkeylevel = USM_KEY_UNSET;
char *authkey = NULL;
size_t authkeylen = 0;
enum usm_key_level privkeylevel = USM_KEY_UNSET;
char *privkey = NULL;
size_t privkeylen = 0;
int seclevel = SNMP_MSGFLAG_REPORT;
char *ctxname = NULL;
char *ctxengineid = NULL, *secengineid = NULL;
size_t ctxengineidlen, secengineidlen;
int zflag = 0;
long long boots = 0, time = 0;
char optstr[BUFSIZ];
const char *errstr;
char *strtolp;
int ch;
size_t i;
/*
* Determine if output can handle UTF-8 based on locale.
*/
setlocale(LC_CTYPE, "");
utf8 = MB_CUR_MAX > 1;
/*
* SMIv2 allows for UTF-8 text at some locations.
* Set it explicitly so we can handle it on the input side.
*/
if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL)
errx(1, "setlocale(LC_CTYPE, \"en_US.UTF-8\") failed");
if (pledge("stdio inet dns unix", NULL) == -1)
err(1, "pledge");
if (argc <= 1)
usage();
optstr[0] = '\0';
for (i = 0; i < sizeof(snmp_apps)/sizeof(*snmp_apps); i++) {
if (strcmp(snmp_apps[i].name, argv[1]) == 0) {
snmp_app = &snmp_apps[i];
if (snmp_app->optstring != NULL) {
if (strlcpy(optstr, snmp_app->optstring,
sizeof(optstr)) > sizeof(optstr))
errx(1, "strlcat");
}
break;
}
}
if (snmp_app == NULL)
usage();
if (snmp_app->usecommonopt) {
if (strlcat(optstr, GETOPT_COMMON, sizeof(optstr)) >
sizeof(optstr))
errx(1, "strlcpy");
}
argc--;
argv++;
smi_init();
while ((ch = getopt(argc, argv, optstr)) != -1) {
switch (ch) {
case 'A':
authkey = optarg;
authkeylen = strlen(authkey);
authkeylevel = USM_KEY_PASSWORD;
break;
case 'a':
if (strcasecmp(optarg, "MD5") == 0)
md = EVP_md5();
else if (strcasecmp(optarg, "SHA") == 0)
md = EVP_sha1();
else if (strcasecmp(optarg, "SHA-224") == 0)
md = EVP_sha224();
else if (strcasecmp(optarg, "SHA-256") == 0)
md = EVP_sha256();
else if (strcasecmp(optarg, "SHA-384") == 0)
md = EVP_sha384();
else if (strcasecmp(optarg, "SHA-512") == 0)
md = EVP_sha512();
else
errx(1, "Invalid authentication protocol "
"specified after -a flag: %s", optarg);
break;
case 'c':
community = optarg;
break;
case 'E':
ctxengineid = snmpc_hex2bin(optarg,
&ctxengineidlen);
if (ctxengineid == NULL) {
if (errno == EINVAL)
errx(1, "Bad engine ID value "
"after -3E flag.");
err(1, "-3E");
}
break;
case 'e':
secengineid = snmpc_hex2bin(optarg,
&secengineidlen);
if (secengineid == NULL) {
if (errno == EINVAL)
errx(1, "Bad engine ID value "
"after -3e flag.");
err(1, "-3e");
}
break;
case 'K':
privkey = snmpc_hex2bin(optarg, &privkeylen);
if (privkey == NULL) {
if (errno == EINVAL)
errx(1, "Bad key value after "
"-3K flag.");
errx(1, "-3K");
}
privkeylevel = USM_KEY_LOCALIZED;
break;
case 'k':
authkey = snmpc_hex2bin(optarg, &authkeylen);
if (authkey == NULL) {
if (errno == EINVAL)
errx(1, "Bad key value after -k flag.");
err(1, "-k");
}
authkeylevel = USM_KEY_LOCALIZED;
break;
case 'l':
if (strcasecmp(optarg, "noAuthNoPriv") == 0)
seclevel = SNMP_MSGFLAG_REPORT;
else if (strcasecmp(optarg, "authNoPriv") == 0)
seclevel = SNMP_MSGFLAG_AUTH |
SNMP_MSGFLAG_REPORT;
else if (strcasecmp(optarg, "authPriv") == 0)
seclevel = SNMP_MSGFLAG_AUTH |
SNMP_MSGFLAG_PRIV | SNMP_MSGFLAG_REPORT;
else
errx(1, "Invalid security level specified "
"after -l flag: %s", optarg);
break;
case 'n':
ctxname = optarg;
break;
case 'r':
if ((retries = strtonum(optarg, 0, INT_MAX,
&errstr)) == 0) {
if (errstr != NULL)
errx(1, "-r: %s argument", errstr);
}
break;
case 't':
if ((timeout = strtonum(optarg, 1, INT_MAX,
&errstr)) == 0) {
if (errstr != NULL)
errx(1, "-t: %s argument", errstr);
}
break;
case 'u':
user = optarg;
break;
case 'v':
if (strcmp(optarg, "1") == 0)
version = SNMP_V1;
else if (strcmp(optarg, "2c") == 0)
version = SNMP_V2C;
else if (strcmp(optarg, "3") == 0)
version = SNMP_V3;
else
errc(1, EINVAL, "-v");
break;
case 'C':
for (i = 0; i < strlen(optarg); i++) {
switch (optarg[i]) {
case 'c':
if (strcmp(snmp_app->name, "walk") &&
strcmp(snmp_app->name, "bulkwalk"))
usage();
walk_check_increase = 0;
break;
case 'h':
if (strcmp(snmp_app->name, "df"))
usage();
print_human = 1;
break;
case 'i':
if (strcmp(snmp_app->name, "walk") &&
strcmp(snmp_app->name, "bulkwalk"))
usage();
walk_include_oid = 1;
break;
case 'n':
if (strcmp(snmp_app->name, "bulkget") &&
strcmp(snmp_app->name, "bulkwalk"))
usage();
errno = 0;
non_repeaters = strtol(&optarg[i + 1],
&strtolp, 10);
if (non_repeaters < 0 ||
errno == ERANGE) {
if (non_repeaters < 0)
errx(1, "%s%s",
"-Cn: too small ",
"argument");
else
errx(1, "%s%s",
"-Cn: too large",
"argument");
} else if (&optarg[i + 1] == strtolp)
errx(1, "-Cn invalid argument");
i = strtolp - optarg - 1;
break;
case 'p':
if (strcmp(snmp_app->name, "walk") &&
strcmp(snmp_app->name, "bulkwalk"))
usage();
print_summary = 1;
break;
case 'r':
if (strcmp(snmp_app->name, "bulkget") &&
strcmp(snmp_app->name, "bulkwalk") &&
strcmp(snmp_app->name, "df"))
usage();
errno = 0;
max_repetitions = strtol(&optarg[i + 1],
&strtolp, 10);
if (max_repetitions < 0 ||
errno == ERANGE) {
if (max_repetitions < 0)
errx(1, "%s%s",
"-Cr: too small ",
"argument");
else
errx(1, "%s%s",
"-Cr: too large",
"argument");
} else if (&optarg[i + 1] == strtolp)
errx(1, "-Cr invalid argument");
i = strtolp - optarg - 1;
break;
case 's':
if (strcmp(snmp_app->name, "walk") &&
strcmp(snmp_app->name, "bulkwalk"))
usage();
if ((walk_skip = recallocarray(
walk_skip, walk_skip_len,
walk_skip_len + 1,
sizeof(*walk_skip))) == NULL)
errx(1, "malloc");
if (smi_string2oid(argv[optind],
&(walk_skip[walk_skip_len])) != 0)
errx(1, "%s: %s",
"Unknown Object Identifier",
argv[optind]);
walk_skip_len++;
optind++;
break;
case 't':
if (strcmp(snmp_app->name, "walk"))
usage();
print_time = 1;
break;
case 'E':
if (strcmp(snmp_app->name, "walk"))
usage();
if (smi_string2oid(argv[optind],
&walk_end) != 0)
errx(1, "%s: %s",
"Unknown Object Identifier",
argv[optind]);
optind++;
continue;
case 'I':
if (strcmp(snmp_app->name, "walk"))
usage();
walk_fallback_oid = 0;
break;
default:
usage();
}
if (optarg[i] == 'E')
break;
}
break;
case 'O':
for (i = 0; i < strlen(optarg); i++) {
if (strcmp(snmp_app->name, "mibtree") == 0 &&
optarg[i] != 'f' && optarg[i] != 'n' &&
optarg[i] != 'S')
usage();
switch (optarg[i]) {
case 'a':
output_string = smi_os_ascii;
break;
case 'f':
oid_lookup = smi_oidl_full;
break;
case 'n':
oid_lookup = smi_oidl_numeric;
break;
case 'q':
print_equals = 0;
smi_print_hint = 0;
break;
case 'v':
print_varbind_only = 1;
break;
case 'x':
output_string = smi_os_hex;
break;
case 'S':
oid_lookup = smi_oidl_short;
break;
case 'Q':
smi_print_hint = 0;
break;
default:
usage();
}
}
break;
case 'X':
privkey = optarg;
privkeylen = strlen(privkey);
privkeylevel = USM_KEY_PASSWORD;
break;
case 'x':
if (strcasecmp(optarg, "DES") == 0)
cipher = EVP_des_cbc();
else if (strcasecmp(optarg, "AES") == 0)
cipher = EVP_aes_128_cfb128();
else
errx(1, "Invalid privacy protocol "
"specified after -3x flag: %s",
optarg);
break;
case 'Z':
boots = strtoll(optarg, &strtolp, 10);
if (boots < 0 || strtolp == optarg || strtolp[0] != ',')
usage();
strtolp++;
time = strtoll(strtolp, &strtolp, 10);
if (boots < 0 || strtolp == optarg)
usage();
zflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!snmp_app->usecommonopt) {
/* No SNMP protocol settings */
} else if (version == SNMP_V1 || version == SNMP_V2C) {
if (community == NULL || community[0] == '\0')
errx(1, "No community name specified.");
} else if (version == SNMP_V3) {
/* Setup USM */
if (user == NULL || user[0] == '\0')
errx(1, "No securityName specified");
if ((sec = usm_init(user, strlen(user))) == NULL)
err(1, "usm_init");
if (seclevel & SNMP_MSGFLAG_AUTH) {
if (md == NULL)
md = EVP_sha1();
if (authkey == NULL)
errx(1, "No authKey or authPassword specified");
if (usm_setauth(sec, md, authkey, authkeylen,
authkeylevel) == -1)
err(1, "Can't set authkey");
}
if (seclevel & SNMP_MSGFLAG_PRIV) {
if (cipher == NULL)
cipher = EVP_aes_128_cfb128();
if (privkey == NULL)
errx(1, "No privKey or privPassword specified");
if (usm_setpriv(sec, cipher, privkey, privkeylen,
privkeylevel) == -1)
err(1, "Can't set authkey");
}
if (secengineid != NULL) {
if (usm_setengineid(sec, secengineid,
secengineidlen) == -1)
err(1, "Can't set secengineid");
}
if (zflag)
if (usm_setbootstime(sec, boots, time) == -1)
err(1, "Can't set boots/time");
v3 = snmp_v3_init(seclevel, ctxname, ctxname == NULL ? 0 :
strlen(ctxname), sec);
if (v3 == NULL)
err(1, "snmp_v3_init");
if (ctxengineid != NULL) {
if (snmp_v3_setengineid(v3, ctxengineid,
ctxengineidlen) == -1)
err(1, "Can't set ctxengineid");
}
}
return snmp_app->exec(argc, argv);
}
int
snmpc_get(int argc, char *argv[])
{
struct ber_oid *oid;
struct ber_element *pdu, *varbind;
struct snmp_agent *agent;
int errorstatus, errorindex;
int i;
int class;
unsigned type;
char *hint = NULL;
if (argc < 2)
usage();
if ((agent = snmpc_connect(argv[0], "161")) == NULL)
err(1, "%s", snmp_app->name);
agent->timeout = timeout;
agent->retries = retries;
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
argc--;
argv++;
oid = reallocarray(NULL, argc, sizeof(*oid));
if (oid == NULL)
err(1, "malloc");
for (i = 0; i < argc; i++) {
if (smi_string2oid(argv[i], &oid[i]) == -1)
errx(1, "%s: Unknown object identifier", argv[i]);
}
if (strcmp(snmp_app->name, "getnext") == 0) {
if ((pdu = snmp_getnext(agent, oid, argc)) == NULL)
err(1, "getnext");
} else if (strcmp(snmp_app->name, "bulkget") == 0) {
if (version < SNMP_V2C)
errx(1, "Cannot send V2 PDU on V1 session");
if (non_repeaters > argc)
errx(1, "need more objects than -Cn<num>");
if ((pdu = snmp_getbulk(agent, oid, argc, non_repeaters,
max_repetitions)) == NULL)
err(1, "bulkget");
} else {
if ((pdu = snmp_get(agent, oid, argc)) == NULL)
err(1, "get");
}
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type, &errorstatus,
&errorindex, &varbind);
if (errorstatus != 0) {
if (errorindex >= 1 && errorindex <= argc)
hint = argv[errorindex - 1];
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, hint);
}
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
printf("Received report:\n");
for (; varbind != NULL; varbind = varbind->be_next) {
if (!snmpc_print(varbind))
err(1, "Can't print response");
}
ober_free_elements(pdu);
snmp_free_agent(agent);
return 0;
}
int
snmpc_walk(int argc, char *argv[])
{
struct ber_oid oid, loid, noid;
struct ber_element *pdu, *varbind, *value;
struct timespec start, finish;
struct snmp_agent *agent;
const char *oids;
int n = 0, prev_cmp, skip_cmp;
int errorstatus, errorindex;
int class;
size_t i;
unsigned type;
if (strcmp(snmp_app->name, "bulkwalk") == 0 && version < SNMP_V2C)
errx(1, "Cannot send V2 PDU on V1 session");
if (argc < 1 || argc > 2)
usage();
oids = argc == 1 ? mib : argv[1];
if ((agent = snmpc_connect(argv[0], "161"))== NULL)
err(1, "%s", snmp_app->name);
agent->timeout = timeout;
agent->retries = retries;
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
if (smi_string2oid(oids, &oid) == -1)
errx(1, "%s: Unknown object identifier", oids);
bcopy(&oid, &noid, sizeof(noid));
if (print_time)
clock_gettime(CLOCK_MONOTONIC, &start);
if (walk_include_oid) {
if ((pdu = snmp_get(agent, &oid, 1)) == NULL)
err(1, "%s", snmp_app->name);
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type,
&errorstatus, &errorindex, &varbind);
if (errorstatus != 0)
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, oids);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
printf("Received report:\n");
if (!snmpc_print(varbind))
err(1, "Can't print response");
ober_free_element(pdu);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
return 1;
n++;
}
while (1) {
for (i = 0; i < walk_skip_len; i++) {
skip_cmp = ober_oid_cmp(&noid, &(walk_skip[i]));
if (skip_cmp == 0 || skip_cmp == 2) {
bcopy(&(walk_skip[i]), &noid, sizeof(noid));
noid.bo_id[noid.bo_n -1]++;
break;
}
}
bcopy(&noid, &loid, sizeof(loid));
if (strcmp(snmp_app->name, "bulkwalk") == 0) {
if ((pdu = snmp_getbulk(agent, &noid, 1,
non_repeaters, max_repetitions)) == NULL)
err(1, "bulkwalk");
} else {
if ((pdu = snmp_getnext(agent, &noid, 1)) == NULL)
err(1, "walk");
}
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type,
&errorstatus, &errorindex, &varbind);
if (errorstatus != 0) {
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, NULL);
}
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
printf("Received report:\n");
for (; varbind != NULL; varbind = varbind->be_next) {
(void) ober_scanf_elements(varbind, "{oe}", &noid,
&value);
if (value->be_class == BER_CLASS_CONTEXT &&
value->be_type == BER_TYPE_EOC)
break;
for (i = 0; i < walk_skip_len; i++) {
skip_cmp = ober_oid_cmp(&noid, &(walk_skip[i]));
if (skip_cmp == 0 || skip_cmp == 2)
break;
}
if (i < walk_skip_len)
continue;
prev_cmp = ober_oid_cmp(&noid, &loid);
if (walk_check_increase && prev_cmp == -1)
errx(1, "OID not increasing");
if (prev_cmp == 0 || ober_oid_cmp(&noid, &oid) != 2)
break;
if (walk_end.bo_n != 0 &&
ober_oid_cmp(&noid, &walk_end) != -1)
break;
if (!snmpc_print(varbind))
err(1, "Can't print response");
n++;
}
ober_free_elements(pdu);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
return 1;
if (varbind != NULL)
break;
}
if (walk_fallback_oid && n == 0) {
if ((pdu = snmp_get(agent, &oid, 1)) == NULL)
err(1, "%s", snmp_app->name);
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type,
&errorstatus, &errorindex, &varbind);
if (errorstatus != 0)
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, oids);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
printf("Received report:\n");
if (!snmpc_print(varbind))
err(1, "Can't print response");
ober_free_element(pdu);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
return 1;
n++;
}
if (print_time)
clock_gettime(CLOCK_MONOTONIC, &finish);
if (print_summary)
printf("Variables found: %d\n", n);
if (print_time) {
if ((finish.tv_nsec -= start.tv_nsec) < 0) {
finish.tv_sec -= 1;
finish.tv_nsec += 1000000000;
}
finish.tv_sec -= start.tv_sec;
fprintf(stderr, "Total traversal time: %lld.%09ld seconds\n",
finish.tv_sec, finish.tv_nsec);
}
snmp_free_agent(agent);
return 0;
}
int
snmpc_set(int argc, char *argv[])
{
struct snmp_agent *agent;
struct ber_element *pdu, *varbind;
int errorstatus, errorindex;
int class;
unsigned type;
char *hint = NULL;
if (argc < 4)
usage();
if ((agent = snmpc_connect(argv[0], "161")) == NULL)
err(1, "%s", snmp_app->name);
argc--;
argv++;
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
if ((pdu = snmp_set(agent, snmpc_varbindparse(argc, argv))) == NULL)
err(1, "set");
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type, &errorstatus,
&errorindex, &varbind);
if (errorstatus != 0) {
if (errorindex >= 1 && errorindex <= argc / 3)
hint = argv[(errorindex - 1) * 3];
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, hint);
}
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT)
printf("Received report:\n");
for (; varbind != NULL; varbind = varbind->be_next) {
if (!snmpc_print(varbind))
err(1, "Can't print response");
}
ober_free_elements(pdu);
snmp_free_agent(agent);
return 0;
}
int
snmpc_trap(int argc, char *argv[])
{
struct snmp_agent *agent;
struct timespec ts;
struct ber_oid trapoid;
const char *errstr = NULL;
long long lval;
if (version == SNMP_V1)
errx(1, "trap is not supported for snmp v1");
if (argc < 3)
usage();
if ((agent = snmpc_connect(argv[0], "162")) == NULL)
err(1, "%s", snmp_app->name);
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
if (argv[1][0] == '\0') {
if (clock_gettime(CLOCK_UPTIME, &ts) == -1)
err(1, "clock_gettime");
} else {
lval = strtonum(argv[1], 0, UINT32_MAX, &errstr);
if (errstr != NULL)
errx(1, "Bad value notation (%s)", argv[1]);
ts.tv_sec = lval / 100;
ts.tv_nsec = (lval % 100) * 10000000;
}
if (smi_string2oid(argv[2], &trapoid) == -1)
errx(1, "Invalid oid: %s\n", argv[2]);
argc -= 3;
argv += 3;
snmp_trap(agent, &ts, &trapoid, snmpc_varbindparse(argc, argv));
return 0;
}
#define INCR_NEXTTAB(x) ((x + 8) & ~7)
#define NEXTTAB(x) (8 - (x & 7))
int
snmpc_df(int argc, char *argv[])
{
struct snmpc_df {
uint32_t index;
char *descr;
int descrwidth;
/* Theoretical maximum for 2 32 bit values multiplied */
char size[21];
char used[21];
char avail[21];
char proc[5];
} *df = NULL;
struct ber_oid descroid = {{ 1, 3, 6, 1, 2, 1, 25, 2, 3, 1, 3 }, 11};
struct ber_oid unitsoid = {{ 1, 3, 6, 1, 2, 1, 25, 2, 3, 1, 4 }, 11};
struct ber_oid sizeoid = {{ 1, 3, 6, 1, 2, 1, 25, 2, 3, 1, 5 }, 11};
struct ber_oid usedoid = {{ 1, 3, 6, 1, 2, 1, 25, 2, 3, 1, 6 }, 11};
struct ber_oid oid, *reqoid;
char oids[SNMP_MAX_OID_STRLEN];
struct ber_element *pdu, *varbind, *elm;
struct snmp_agent *agent;
int errorstatus, errorindex;
int class;
size_t i, j, rows = 0;
unsigned type;
char *string;
int descrlen = 0, sizelen = 0, usedlen = 0, availlen = 0, proclen = 0;
int len;
long long units, size, used;
int fmtret;
if (argc != 1)
usage();
if ((agent = snmpc_connect(argv[0], "161")) == NULL)
err(1, "%s", snmp_app->name);
agent->timeout = timeout;
agent->retries = retries;
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
descrlen = sizeof("Description") - 1;
sizelen = sizeof("Size") - 1;
usedlen = sizeof("Used") - 1;
availlen = sizeof("Available") - 1;
proclen = sizeof("Used%") - 1;
bcopy(&descroid, &oid, sizeof(descroid));
i = 0;
while(1) {
if (version < SNMP_V2C) {
if ((pdu = snmp_getnext(agent, &oid, 1)) == NULL)
err(1, "df");
} else {
if ((pdu = snmp_getbulk(agent, &oid, 1, 0,
max_repetitions)) == NULL)
err(1, "df");
}
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type,
&errorstatus, &errorindex, &varbind);
if (errorstatus != 0)
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, NULL);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT) {
printf("Received report:\n");
for (; varbind != NULL; varbind = varbind->be_next) {
if (!snmpc_print(varbind))
err(1, "Can't print response");
}
return 1;
}
for (; varbind != NULL; varbind = varbind->be_next) {
if (ober_scanf_elements(varbind, "{os", &oid,
&string) == -1 ||
ober_oid_cmp(&oid, &descroid) != 2)
break;
rows++;
}
if ((df = reallocarray(df, rows, sizeof(*df))) == NULL)
err(1, "malloc");
(void) ober_scanf_elements(pdu, "{SSS{e", &varbind);
for (; i < rows; varbind = varbind->be_next, i++) {
if (ober_scanf_elements(varbind, "{oe", &oid,
&elm) == -1) {
i--;
rows--;
continue;
}
if (ober_oid_cmp(&oid, &descroid) != 2)
break;
df[i].index = oid.bo_id[oid.bo_n - 1];
if ((df[i].descr = smi_print_element(&oid, elm, 0,
smi_os_ascii, 0, utf8)) == NULL) {
smi_oid2string(&oid, oids, sizeof(oids),
oid_lookup);
warn("df: can't print oid %s", oids);
i--;
rows--;
continue;
}
if ((df[i].descrwidth =
(int) snmpc_mbswidth(df[i].descr)) == -1)
err(1, "df: invalid hrStorageDescr");
if (df[i].descrwidth > descrlen)
descrlen = df[i].descrwidth;
}
ober_free_elements(pdu);
if (varbind != NULL)
break;
}
if (max_repetitions < 3)
max_repetitions = 3;
if ((reqoid = reallocarray(NULL, max_repetitions, sizeof(*reqoid))) == NULL)
err(1, "malloc");
for (i = 0; i < rows;) {
for (j = 0; i + j < rows && j < (size_t)max_repetitions / 3;
j++) {
bcopy(&unitsoid, &(reqoid[(j * 3) + 0]),
sizeof(unitsoid));
reqoid[(j * 3) + 0].bo_id[
reqoid[(j * 3) + 0].bo_n++] = df[i + j].index;
bcopy(&sizeoid, &(reqoid[(j * 3) + 1]),
sizeof(sizeoid));
reqoid[(j * 3) + 1].bo_id[
reqoid[(j * 3) + 1].bo_n++] = df[i + j].index;
bcopy(&usedoid, &(reqoid[(j * 3) + 2]),
sizeof(usedoid));
reqoid[(j * 3) + 2].bo_id[
reqoid[(j * 3) + 2].bo_n++] = df[i + j].index;
}
if ((pdu = snmp_get(agent, reqoid, j * 3)) == NULL)
err(1, "df");
(void) ober_scanf_elements(pdu, "t{Sdd{e", &class, &type,
&errorstatus, &errorindex, &varbind);
if (errorstatus != 0)
snmpc_printerror((enum snmp_error) errorstatus, varbind,
errorindex, NULL);
if (class == BER_CLASS_CONTEXT && type == SNMP_C_REPORT) {
printf("Received report:\n");
for (; varbind != NULL; varbind = varbind->be_next) {
if (!snmpc_print(varbind))
err(1, "Can't print response");
}
}
for (j = 0; varbind != NULL; i++) {
if (ober_scanf_elements(varbind, "{oi}{oi}{oi}",
&(reqoid[0]), &units, &(reqoid[1]), &size,
&(reqoid[2]), &used, &varbind) == -1) {
break;
}
varbind = varbind->be_next->be_next->be_next;
unitsoid.bo_id[unitsoid.bo_n++] = df[i].index;
if (ober_oid_cmp(&unitsoid, &(reqoid[0])) != 0) {
warnx("df: received invalid object");
break;
}
unitsoid.bo_n--;
sizeoid.bo_id[sizeoid.bo_n++] = df[i].index;
if (ober_oid_cmp(&sizeoid, &(reqoid[1])) != 0) {
warnx("df: received invalid object");
break;
}
sizeoid.bo_n--;
usedoid.bo_id[usedoid.bo_n++] = df[i].index;
if (ober_oid_cmp(&usedoid, &(reqoid[2])) != 0) {
warnx("df: received invalid object");
break;
}
usedoid.bo_n--;
if (print_human)
fmtret = fmt_scaled((units * size), df[i].size);
if (!print_human || fmtret == -1)
snprintf(df[i].size, sizeof(df[i].size), "%lld",
(units * size) / 1024);
len = (int) strlen(df[i].size);
if (len > sizelen)
sizelen = len;
if (print_human)
fmtret = fmt_scaled(units * used, df[i].used);
if (!print_human || fmtret == -1)
snprintf(df[i].used, sizeof(df[i].used), "%lld",
(units * used) / 1024);
len = (int) strlen(df[i].used);
if (len > usedlen)
usedlen = len;
if (print_human)
fmtret = fmt_scaled(units * (size - used),
df[i].avail);
if (!print_human || fmtret == -1)
snprintf(df[i].avail, sizeof(df[i].avail),
"%lld", (units * (size - used)) / 1024);
len = (int) strlen(df[i].avail);
if (len > availlen)
availlen = len;
if (size == 0)
strlcpy(df[i].proc, "0%", sizeof(df[i].proc));
else {
snprintf(df[i].proc, sizeof(df[i].proc),
"%lld%%", (used * 100) / size);
}
len = (int) strlen(df[i].proc);
if (len > proclen)
proclen = len;
j++;
}
if (j == 0) {
warnx("Failed to retrieve information for %s",
df[i].descr);
memmove(df + i, df + i + 1,
(rows - i - 1) * sizeof(*df));
rows--;
i--;
}
}
printf("%-*s%*s%*s%*s%*s\n",
descrlen, "Description",
NEXTTAB(descrlen) + sizelen, "Size",
NEXTTAB(sizelen) + usedlen, "Used",
NEXTTAB(usedlen) + availlen, "Available",
NEXTTAB(availlen) + proclen, "Used%");
for (i = 0; i < rows; i++) {
printf("%s%*s%*s%*s%*s%*s\n",
df[i].descr, descrlen - df[i].descrwidth, "",
NEXTTAB(descrlen) + sizelen, df[i].size,
NEXTTAB(sizelen) + usedlen, df[i].used,
NEXTTAB(usedlen) + availlen, df[i].avail,
NEXTTAB(availlen) + proclen, df[i].proc);
}
return 0;
}
int
snmpc_mibtree(int argc, char *argv[])
{
struct oid *oid;
struct ber_oid soid;
char buf[BUFSIZ];
int i;
if (argc == 0) {
for (oid = NULL; (oid = smi_foreach(oid)) != NULL;) {
smi_oid2string(&oid->o_id, buf, sizeof(buf),
oid_lookup);
printf("%s\n", buf);
}
} else {
for (i = 0; i < argc; i++) {
if (smi_string2oid(argv[i], &soid) == -1) {
warnx("%s: Unknown object identifier", argv[i]);
continue;
}
smi_oid2string(&soid, buf, sizeof(buf), oid_lookup);
printf("%s\n", buf);
}
}
return 0;
}
struct snmp_agent *
snmpc_connect(char *host, char *port)
{
switch (version) {
case SNMP_V1:
case SNMP_V2C:
return snmp_connect_v12(snmpc_parseagent(host, port), version,
community);
case SNMP_V3:
return snmp_connect_v3(snmpc_parseagent(host, port), v3);
}
return NULL;
}
int
snmpc_print(struct ber_element *elm)
{
struct ber_oid oid;
char oids[SNMP_MAX_OID_STRLEN];
char *value;
elm = elm->be_sub;
if (ober_get_oid(elm, &oid) != 0) {
errno = EINVAL;
return 0;
}
elm = elm->be_next;
value = smi_print_element(&oid, elm, smi_print_hint, output_string,
oid_lookup, utf8);
if (value == NULL)
return 0;
if (print_varbind_only)
printf("%s\n", value);
else if (print_equals) {
smi_oid2string(&oid, oids, sizeof(oids), oid_lookup);
printf("%s = %s\n", oids, value);
} else {
smi_oid2string(&oid, oids, sizeof(oids), oid_lookup);
printf("%s %s\n", oids, value);
}
free(value);
return 1;
}
__dead void
snmpc_printerror(enum snmp_error error, struct ber_element *varbind,
int index, const char *hint)
{
struct ber_oid hoid, vboid;
char oids[SNMP_MAX_OID_STRLEN];
const char *oid = NULL;
int i;
if (index >= 1) {
/* Only print if the index is in the reply */
for (i = 1; varbind != NULL && i < index;
varbind = varbind->be_next)
i++;
if (varbind != NULL &&
ober_get_oid(varbind->be_sub, &vboid) == 0) {
/* If user and reply conform print user input */
if (hint != NULL &&
smi_string2oid(hint, &hoid) == 0 &&
ober_oid_cmp(&hoid, &vboid) == 0)
oid = hint;
else
oid = smi_oid2string(&vboid, oids,
sizeof(oids), oid_lookup);
}
}
if (oid == NULL)
oid = "?";
switch (error) {
case SNMP_ERROR_NONE:
errx(1, "No error, how did I get here?");
case SNMP_ERROR_TOOBIG:
errx(1, "Can't parse oid %s: Response too big", oid);
case SNMP_ERROR_NOSUCHNAME:
errx(1, "Can't parse oid %s: No such object", oid);
case SNMP_ERROR_BADVALUE:
errx(1, "Can't parse oid %s: Bad value", oid);
case SNMP_ERROR_READONLY:
errx(1, "Can't parse oid %s: Read only", oid);
case SNMP_ERROR_GENERR:
errx(1, "Can't parse oid %s: Generic error", oid);
case SNMP_ERROR_NOACCESS:
errx(1, "Can't parse oid %s: Access denied", oid);
case SNMP_ERROR_WRONGTYPE:
errx(1, "Can't parse oid %s: Wrong type", oid);
case SNMP_ERROR_WRONGLENGTH:
errx(1, "Can't parse oid %s: Wrong length", oid);
case SNMP_ERROR_WRONGENC:
errx(1, "Can't parse oid %s: Wrong encoding", oid);
case SNMP_ERROR_WRONGVALUE:
errx(1, "Can't parse oid %s: Wrong value", oid);
case SNMP_ERROR_NOCREATION:
errx(1, "Can't parse oid %s: Can't be created", oid);
case SNMP_ERROR_INCONVALUE:
errx(1, "Can't parse oid %s: Inconsistent value", oid);
case SNMP_ERROR_RESUNAVAIL:
errx(1, "Can't parse oid %s: Resource unavailable", oid);
case SNMP_ERROR_COMMITFAILED:
errx(1, "Can't parse oid %s: Commit failed", oid);
case SNMP_ERROR_UNDOFAILED:
errx(1, "Can't parse oid %s: Undo failed", oid);
case SNMP_ERROR_AUTHERROR:
errx(1, "Can't parse oid %s: Authorization error", oid);
case SNMP_ERROR_NOTWRITABLE:
errx(1, "Can't parse oid %s: Not writable", oid);
case SNMP_ERROR_INCONNAME:
errx(1, "Can't parse oid %s: Inconsistent name", oid);
}
errx(1, "Can't parse oid %s: Unknown error (%d)", oid, error);
}
int
snmpc_parseagent(char *agent, char *defaultport)
{
struct addrinfo hints, *ai, *ai0 = NULL;
struct sockaddr_un saddr;
char *agentdup, *specifier, *hostname, *port = NULL;
int error;
int s;
if ((agentdup = specifier = strdup(agent)) == NULL)
err(1, NULL);
bzero(&hints, sizeof(hints));
if ((hostname = strchr(specifier, ':')) != NULL) {
*hostname++ = '\0';
if (strcasecmp(specifier, "udp") == 0) {
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
} else if (strcasecmp(specifier, "tcp") == 0) {
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
} else if (strcasecmp(specifier, "udp6") == 0 ||
strcasecmp(specifier, "udpv6") == 0 ||
strcasecmp(specifier, "udpipv6") == 0) {
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_DGRAM;
} else if (strcasecmp(specifier, "tcp6") == 0 ||
strcasecmp(specifier, "tcpv6") == 0 ||
strcasecmp(specifier, "tcpipv6") == 0) {
hints.ai_family = AF_INET6;
hints.ai_socktype = SOCK_STREAM;
} else if (strcasecmp(specifier, "unix") == 0) {
hints.ai_family = AF_UNIX;
hints.ai_addr = (struct sockaddr *)&saddr;
hints.ai_addrlen = sizeof(saddr);
saddr.sun_len = sizeof(saddr);
saddr.sun_family = AF_UNIX;
if (strlcpy(saddr.sun_path, hostname,
sizeof(saddr.sun_path)) > sizeof(saddr.sun_path))
errx(1, "Hostname path too long");
ai = &hints;
} else {
*--hostname = ':';
hostname = specifier;
}
} else {
hostname = specifier;
}
if (hints.ai_family == AF_INET) {
if ((port = strchr(hostname, ':')) != NULL)
*port++ = '\0';
} else if (hints.ai_family == AF_INET6 || hints.ai_family == 0) {
if (hostname[0] == '[') {
hints.ai_family = AF_INET6;
hostname++;
if ((port = strchr(hostname, ']')) == NULL)
errx(1, "invalid agent");
*port++ = '\0';
if (port[0] == ':')
*port++ = '\0';
else if (port[0] == '\0')
port = NULL;
else
errx(1, "invalid agent");
} else {
if ((port = strrchr(hostname, ':')) != NULL)
*port++ = '\0';
}
}
if (hints.ai_family != AF_UNIX) {
if (hints.ai_socktype == 0)
hints.ai_socktype = SOCK_DGRAM;
if (port == NULL)
port = defaultport;
error = getaddrinfo(hostname, port, &hints, &ai0);
if (error) {
if (error != EAI_NODATA || port == defaultport)
errx(1, "%s", gai_strerror(error));
*--port = ':';
error = getaddrinfo(hostname, defaultport, &hints,
&ai0);
if (error)
errx(1, "%s", gai_strerror(error));
}
s = -1;
for (ai = ai0; ai != NULL; ai = ai->ai_next) {
if ((s = socket(ai->ai_family, ai->ai_socktype,
ai->ai_protocol)) != -1 &&
connect(s, (struct sockaddr *)ai->ai_addr,
ai->ai_addrlen) != -1)
break;
close(s);
s = -1;
}
} else {
s = socket(AF_UNIX, SOCK_STREAM, 0);
if (connect(s, (struct sockaddr *)ai->ai_addr,
ai->ai_addrlen) == -1)
err(1, "Can't connect to %s", agent);
}
if (s == -1)
err(1, "Can't connect to agent %s", agent);
if (ai0 != NULL)
freeaddrinfo(ai0);
free(agentdup);
return s;
}
char *
snmpc_hex2bin(char *hexstr, size_t *binlen)
{
char *decstr;
if (hexstr[0] == '0' && hexstr[1] == 'x')
hexstr += 2;
while (hexstr[0] == ' ' || hexstr[0] == '\t')
hexstr++;
if ((decstr = malloc((strlen(hexstr) / 2) + 1)) == NULL)
return NULL;
for (*binlen = 0; hexstr[0] != '\0'; (*binlen)++) {
hexstr[0] = toupper(hexstr[0]);
hexstr[1] = toupper(hexstr[1]);
if (hexstr[0] >= '0' && hexstr[0] <= '9')
decstr[*binlen] = (hexstr[0] - '0') << 4;
else if (hexstr[0] >= 'A' && hexstr[0] <= 'F')
decstr[*binlen] = ((hexstr[0] - 'A') + 10) << 4;
else
goto fail;
if (hexstr[1] >= '0' && hexstr[1] <= '9')
decstr[*binlen] |= (hexstr[1] - '0');
else if (hexstr[1] >= 'A' && hexstr[1] <= 'F')
decstr[*binlen] |= (hexstr[1] - 'A') + 10;
else
goto fail;
hexstr += 2;
while (hexstr[0] == ' ' || hexstr[0] == '\t')
hexstr++;
}
return decstr;
fail:
errno = EINVAL;
free(decstr);
return NULL;
}
ssize_t
snmpc_mbswidth(char *str)
{
wchar_t wc;
size_t width = 0;
size_t i;
int len;
for (i = 0; (len = mbtowc(&wc, &(str[i]), MB_CUR_MAX)) != 0; i += len) {
if (len == -1) {
mbtowc(NULL, NULL, MB_CUR_MAX);
return -1;
}
width += wcwidth(wc);
}
return width;
}
struct ber_element *
snmpc_varbindparse(int argc, char *argv[])
{
struct ber_oid oid, oidval;
struct in_addr addr4;
char *addr = (char *)&addr4;
char *str = NULL, *tmpstr, *endstr;
const char *errstr = NULL;
struct ber_element *varbind = NULL, *vblist = NULL;
int i, ret;
size_t strl, byte;
long long lval;
if (argc % 3 != 0)
usage();
for (i = 0; i < argc; i += 3) {
if (smi_string2oid(argv[i], &oid) == -1)
errx(1, "Invalid oid: %s\n", argv[i]);
switch (argv[i + 1][0]) {
case 'a':
ret = inet_pton(AF_INET, argv[i + 2], &addr4);
if (ret == -1)
err(1, "inet_pton");
if (ret == 0)
errx(1, "%s: Bad value notation (%s)", argv[i],
argv[i + 2]);
if ((varbind = ober_printf_elements(varbind, "{Oxt}",
&oid, addr, sizeof(addr4), BER_CLASS_APPLICATION,
SNMP_T_IPADDR)) == NULL)
err(1, "ober_printf_elements");
break;
case 'b':
tmpstr = argv[i + 2];
strl = 0;
do {
lval = strtoll(tmpstr, &endstr, 10);
if (endstr[0] != ' ' && endstr[0] != '\t' &&
endstr[0] != ',' && endstr[0] != '\0')
errx(1, "%s: Bad value notation (%s)",
argv[i], argv[i + 2]);
if (tmpstr == endstr) {
tmpstr++;
continue;
}
if (lval < 0)
errx(1, "%s: Bad value notation (%s)",
argv[i], argv[i + 2]);
byte = lval / 8;
if (byte >= strl) {
if ((str = recallocarray(str, strl,
byte + 1, 1)) == NULL)
err(1, "malloc");
strl = byte + 1;
}
str[byte] |= 0x80 >> (lval % 8);
tmpstr = endstr + 1;
} while (endstr[0] != '\0');
/*
* RFC3416 Section 2.5
* A BITS value is encoded as an OCTET STRING
*/
goto pastestring;
case 'c':
lval = strtonum(argv[i + 2], 0, UINT32_MAX,
&errstr);
if (errstr != NULL)
errx(1, "%s: Bad value notation (%s)", argv[i],
argv[i + 2]);
if ((varbind = ober_printf_elements(varbind, "{Oit}",
&oid, lval, BER_CLASS_APPLICATION,
SNMP_T_COUNTER32)) == NULL)
err(1, "ober_printf_elements");
break;
case 'd':
/* String always shrinks */
if ((str = malloc(strlen(argv[i + 2]))) == NULL)
err(1, "malloc");
tmpstr = argv[i + 2];
strl = 0;
do {
lval = strtoll(tmpstr, &endstr, 10);
if (endstr[0] != ' ' && endstr[0] != '\t' &&
endstr[0] != '\0')
errx(1, "%s: Bad value notation (%s)",
argv[i], argv[i + 2]);
if (tmpstr == endstr) {
tmpstr++;
continue;
}
if (lval < 0 || lval > 0xff)
errx(1, "%s: Bad value notation (%s)",
argv[i], argv[i + 2]);
str[strl++] = (unsigned char) lval;
tmpstr = endstr + 1;
} while (endstr[0] != '\0');
goto pastestring;
case 'i':
lval = strtonum(argv[i + 2], INT32_MIN, INT32_MAX,
&errstr);
if (errstr != NULL)
errx(1, "%s: Bad value notation (%s)", argv[i],
argv[i + 2]);
if ((varbind = ober_printf_elements(varbind, "{Oi}",
&oid, lval)) == NULL)
err(1, "ober_printf_elements");
break;
case 'n':
if ((varbind = ober_printf_elements(varbind, "{O0}",
&oid)) == NULL)
err(1, "ober_printf_elements");
break;
case 'o':
if (smi_string2oid(argv[i + 2], &oidval) == -1)
errx(1, "%s: Unknown Object Identifier (Sub-id "
"not found: (top) -> %s)", argv[i],
argv[i + 2]);
if ((varbind = ober_printf_elements(varbind, "{OO}",
&oid, &oidval)) == NULL)
err(1, "ober_printf_elements");
break;
case 's':
if ((str = strdup(argv[i + 2])) == NULL)
err(1, NULL);
strl = strlen(argv[i + 2]);
pastestring:
if ((varbind = ober_printf_elements(varbind, "{Ox}",
&oid, str, strl)) == NULL)
err(1, "ober_printf_elements");
free(str);
break;
case 't':
lval = strtonum(argv[i + 2], 0, UINT32_MAX,
&errstr);
if (errstr != NULL)
errx(1, "%s: Bad value notation (%s)", argv[i],
argv[i + 2]);
if ((varbind = ober_printf_elements(varbind, "{Oit}",
&oid, lval, BER_CLASS_APPLICATION,
SNMP_T_TIMETICKS)) == NULL)
err(1, "ober_printf_elements");
break;
case 'u':
lval = strtonum(argv[i + 2], 0, UINT32_MAX,
&errstr);
if (errstr != NULL)
errx(1, "%s: Bad value notation (%s)", argv[i],
argv[i + 2]);
if ((varbind = ober_printf_elements(varbind, "{Oit}",
&oid, lval, BER_CLASS_APPLICATION,
SNMP_T_GAUGE32)) == NULL)
err(1, "ober_printf_elements");
break;
case 'x':
/* String always shrinks */
if ((str = malloc(strlen(argv[i + 2]))) == NULL)
err(1, "malloc");
tmpstr = argv[i + 2];
strl = 0;
do {
lval = strtoll(tmpstr, &endstr, 16);
if (endstr[0] != ' ' && endstr[0] != '\t' &&
endstr[0] != '\0')
errx(1, "%s: Bad value notation (%s)",
argv[i], argv[i + 2]);
if (tmpstr == endstr) {
tmpstr++;
continue;
}
if (lval < 0 || lval > 0xff)
errx(1, "%s: Bad value notation (%s)",
argv[i], argv[i + 2]);
str[strl++] = (unsigned char) lval;
tmpstr = endstr + 1;
} while (endstr[0] != '\0');
goto pastestring;
default:
usage();
}
if (vblist == NULL)
vblist = varbind;
}
return vblist;
}
__dead void
usage(void)
{
size_t i;
if (snmp_app != NULL) {
fprintf(stderr, "usage: snmp %s%s%s\n",
snmp_app->name,
snmp_app->usecommonopt ?
" [-A authpass] [-a digest] [-c community] [-e secengineid]\n"
" [-E ctxengineid] [-K localpriv] [-k localauth] [-l seclevel]\n"
" [-n ctxname] [-O afnqvxSQ] [-r retries] [-t timeout] [-u user]\n"
" [-v version] [-X privpass] [-x cipher] [-Z boots,time]\n"
" " : "",
snmp_app->usage == NULL ? " " : snmp_app->usage);
exit(1);
}
for (i = 0; i < (sizeof(snmp_apps)/sizeof(*snmp_apps)); i++) {
if (i == 0)
fprintf(stderr, "usage: ");
else
fprintf(stderr, " ");
fprintf(stderr, "snmp %s%s %s\n",
snmp_apps[i].name,
snmp_apps[i].usecommonopt ?
" [options]" : "",
snmp_apps[i].usage ? snmp_apps[i].usage : "");
}
exit(1);
}
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