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onesixtyone.c
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onesixtyone.c
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/*
* onesixtyone version 0.8 Copyright (C) 2002 solareclipse@phreedom.org
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Fixed 13/10/2005 (john@ev6.net) No longer uses a fixed size array to
* hold communities and hosts.. Should scale to any number of hosts or
* communities
*
* Fixed 28/03/2006 (larkmowe@gmail.com) -w option now works. Spaces allowed
* in communitry strings read from files.
*
* Fixed 25/05/2012 (about.me/r.hicks) -p option allows you to specify a custom port other than 161 to scan.
* Fixed 25/05/2012 (about.me/r.hicks) fixed underlying issue with outputting custom port numbers to the screen. Cosmetic.
* Fixed 17/01/2013 (about.me/r.hicks) fixed yet another issue with outputting custom port numbers to the screen, also sorted out scanning a list of hosts for a custom port.
*
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
/*
* the defaults
*/
int community_count = 2;
char *community[] = { "public", "private" };
#ifndef INADDR_NONE /* Solaris is broken */
#define INADDR_NONE -1
#endif
char *snmp_errors[] = {
"NO ERROR", /* 0 */
"TOO BIG", /* 1 */
"NO SUCH NAME", /* 2 */
"BAD VALUE", /* 3 */
"READ ONLY", /* 4 */
"GENERIC ERROR", /* 5 */
"NO ACCESS", /* 6 */
"WRONG TYPE", /* 7 */
"WRONG LENGTH", /* 8 */
"WRONG ENCODING", /* 9 */
"WRONG VALUE", /* 10 */
"NO CREATION", /* 11 */
"INCONSISTENT VALUE", /* 12 */
"RESOURCE UNAVAILABLE", /* 13 */
"COMMIT FAILED", /* 14 */
"UNDO FAILED", /* 15 */
"AUTHORIZATION ERROR", /* 16 */
"NOT WRITABLE", /* 17 */
"INCONSISTENT NAME", /* 18 */
};
struct {
int debug;
int log;
int quiet;
int port;
char portStr[5];
long wait;
FILE *log_fd;
} o;
char community_filename[250];
char input_filename[250];
int host_count = 0;
char singlehost[64];
void
usage(char *cmdline)
{
printf("onesixtyone v0.8 ( http://about.me/r.hicks )\n");
printf(" Source at www.phillips321.co.uk\n");
printf("Based on modified onesixtyone by http://labs.portcullis.co.uk/application/onesixtyone/\n");
printf("Based on original onesixtyone by solareclipse@phreedom.org\n");
printf("\n");
printf("Usage: onesixtyone [options] <host> <community>\n");
printf(" -c <communityfile> file with community names to try\n");
printf(" -i <inputfile> file with target hosts\n");
printf(" -o <outputfile> output log\n");
printf(" -d debug mode, use twice for more information\n\n");
printf(" -p <portnumber> specify a non-standard port to scan against\n\n");
printf(" -w n wait n milliseconds (1/1000 of a second) between sending packets (default 10)\n");
printf(" -q quiet mode, do not print log to stdout, use with -l\n");
printf("examples: %s -c dict.txt 192.168.4.1 public\n", cmdline);
printf(" %s -c dict.txt -i hosts -o my.log -w 100\n\n", cmdline);
}
void
read_communities(char *filename)
{
FILE *fd;
int i,
c;
char ecom[1024];
if (o.debug > 0)
printf("Using community file %s\n", filename);
if ((fd = fopen(filename, "r")) == 0) {
printf("Error opening community file %s\n", filename);
return;
}
i = 0;
c = 0;
/*
* loop 1, determine number of lines
*/
while (fgets(ecom, sizeof(ecom), fd)) {
i++;
}
community_count = i;
fclose(fd);
}
void
read_hosts(char *filename)
{
FILE *fd;
char
ecom[1024];
host_count = 0;
if ((fd = fopen(filename, "r")) == 0) {
printf("Error opening hosts file %s\n", filename);
return;
}
/*
* loop 1, determine number of lines
*/
while (fgets(ecom, sizeof(ecom), fd)) {
host_count++;
}
if (o.debug > 0)
printf("%d hosts read from file\n", host_count);
}
void
logfx(char *fmt, ...)
{
va_list args;
va_start(args, fmt);
if (o.log)
vfprintf(o.log_fd, fmt, args);
if (!o.quiet)
vprintf(fmt, args);
va_end(args);
}
void
init_options(int argc, char *argv[])
{
char log_filename[255];
int input_file;
int community_file;
int arg;
o.debug = 0;
o.log = 0;
o.quiet = 0;
o.wait = 10;
o.port = 161;
strncpy(o.portStr,"161",sizeof(o.portStr) - 1);
o.portStr[sizeof(o.portStr)-1] = 0;
input_file = 0;
community_file = 0;
o.log_fd = NULL;
while ((arg = getopt(argc, argv, "c:di:o:p:w:q")) != EOF) {
switch (arg) {
case 'c':
community_file = 1;
strncpy(community_filename, optarg,
sizeof(community_filename));
break;
case 'd':
o.debug++;
break;
case 'i':
input_file = 1;
strncpy(input_filename, optarg, sizeof(input_filename));
break;
case 'o':
o.log = 1;
strncpy(log_filename, optarg, sizeof(log_filename));
break;
case 'w':
o.wait = atol(optarg); /* convert to nanoseconds */
break;
case 'q':
o.quiet = 1;
break;
case 'p':
o.port = atoi(optarg); /*added ability to specify a port */
strncpy(o.portStr,optarg,sizeof(o.portStr));
break;
case '?':
usage(argv[0]);
exit(1);
break;
}
}
if (o.debug) {
if (o.debug > 0)
printf("Debug level %d\n", o.debug);
}
if (!input_file) {
if (optind >= argc) {
usage(argv[0]);
exit(1);
}
snprintf(singlehost, sizeof(singlehost), "%s", argv[optind++]);
host_count = 1;
if (o.debug > 0)
printf("Target ip read from command line: %s\n",
argv[optind - 1]);
} else {
read_hosts((char *) &input_filename);
}
if (community_file) {
read_communities((char *) &community_filename);
}
if (optind < argc) {
if (community_file) {
usage(argv[0]);
exit(1);
}
community[0] = argv[optind++];
community_count = 1;
if (o.debug > 0)
printf("Community read from command line: %s\n",
community[0]);;
}
if (optind < argc) {
usage(argv[0]);
exit(1);
}
if (o.log) {
if ((o.log_fd = fopen(log_filename, "w")) == 0) {
printf("Error opening log file %s\n", log_filename);
exit(1);
}
printf("Logging to file %s\n", log_filename);
if(o.port != 161){
char * s = malloc(snprintf(NULL, 0, "%s %d", "Non-standard port selected - scanning port:\n", o.port) + 1);
sprintf(s, "%s %d\n", "Non-standard port selected - scanning port:", o.port);
logfx(s);
}
} else if (o.quiet) {
printf
("Warning: quiet mode specified without logging, you will lose your scan results\n");
}
/*
* if (o.debug > 0) { printf("%d communities:", community_count); for
* (i=0; i < community_count; i++) printf(" %s", community[i]);
* printf("\n"); }
*/
if (o.debug > 0) {
printf("%d communities\n", community_count);
}
if (o.debug > 0)
printf("Waiting for %ld milliseconds between packets\n", o.wait);
}
int
build_snmp_req(char *buf, int buf_size, char *community)
{
int i;
static int id;
char object[] =
"\x30\x0e\x30\x0c\x06\x08\x2b\x06\x01\x02\x01\x01\x01\x0\x05\x00";
if (21 + strlen(community) + strlen(object) > buf_size) {
printf("SNMP packet length exceeded.\nCommunity: %s\nObject: %s\n",
community, object);
exit(1);
}
if (--id > 0x7ffe)
id = 0;
memset(buf, 0, buf_size);
buf[0] = 0x30;
buf[1] = 19 + strlen(community) + sizeof(object) - 1;
/*
* Version: 1
*/
buf[2] = 0x02;
buf[3] = 0x01;
buf[4] = 0x00;
/*
* Community
*/
buf[5] = 0x04;
buf[6] = strlen(community);
strcpy((buf + 7), community);
i = 7 + strlen(community);
/*
* PDU type: GET
*/
buf[i++] = ' ';
buf[i++] = 12 + sizeof(object) - 1;
/*
* Request ID
*/
buf[i++] = 0x02;
buf[i++] = 0x04;
buf[i++] = (char) ((id >> 24) & 0xff);
buf[i++] = (char) ((id >> 16) & 0xff);
buf[i++] = (char) ((id >> 8) & 0xff);
buf[i++] = (char) ((id >> 0) & 0xff);
/*
* Error status: no error
*/
buf[i++] = 0x02;
buf[i++] = 0x01;
buf[i++] = 0x00;
/*
* Error index
*/
buf[i++] = 0x02;
buf[i++] = 0x01;
buf[i++] = 0x00;
/*
* Object ID
*/
memcpy((char *) &buf[i], &object, sizeof(object) - 1);
i = i + sizeof(object) - 1;
return (i);
}
int
parse_asn_length(u_char * buf, int buf_size, int *i)
{
int len;
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[*i] < 0x81) {
len = buf[*i];
*i += 1;
} else if (buf[*i] == 0x81) {
*i += 1;
if ((*i) + 1 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
len = buf[*i];
*i += 1;
} else if (buf[*i] == 0x82) {
*i += 1;
if ((*i) + 2 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
len = (buf[*i] << 8) + buf[(*i) + 1];
*i += 2;
} else if (buf[*i] == 0x83) {
*i += 1;
if ((*i) + 3 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
len = (buf[*i] << 16) + (buf[(*i) + 1] << 8) + buf[(*i) + 2];
*i += 3;
} else if (buf[*i] == 0x84) {
*i += 1;
if ((*i) + 4 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
len =
(buf[*i] << 24) + (buf[(*i) + 1] << 16) +
(buf[(*i) + 2] << 8) + buf[(*i) + 3];
*i += 4;
} else {
logfx("Unable to decode SNMP packet: wrong length\n");
return -1;
}
if ((*i) + len > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
return len;
}
int
skip_asn_length(u_char * buf, int buf_size, int *i)
{
int ret;
if ((ret = parse_asn_length(buf, buf_size, i)) > 0)
*i += ret;
return ret;
}
int
parse_asn_integer(u_char * buf, int buf_size, int *i)
{
int ret;
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[*i] == 0x81) {
*i += 1;
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
}
if (buf[*i] == 0x01) {
if ((*i) + 2 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
ret = (int) buf[(*i) + 1];
*i += 2;
} else if (buf[*i] == 0x02) {
if ((*i) + 3 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
ret = ((int) buf[(*i) + 1] << 8) + (int) buf[(*i) + 2];
*i += 3;
} else if (buf[*i] == 0x04) {
if ((*i) + 5 > buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
ret = ((int) buf[(*i) + 1] << 24) +
((int) buf[(*i) + 2] << 16) +
((int) buf[(*i) + 3] << 8) + (int) buf[(*i) + 4];
*i += 5;
} else {
logfx
("Unable to decode SNMP packet: unrecognized integer length\n");
return -1;
}
return ret;
}
int
print_asn_string(u_char * buf, int buf_size, int *i)
{
int ret;
int string_end;
if ((ret = parse_asn_length(buf, buf_size, i)) == -1)
return -1;
else
string_end = *i + ret;
for (; *i < string_end; *i += 1) {
if (buf[*i] < 0x20 || buf[*i] > 0x80)
logfx(" ");
else
logfx("%c", buf[*i]);
}
return 0;
}
int
parse_snmp_header(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x30) {
logfx("Unable to decode SNMP packet: wrong header\n");
return -1;
}
if (parse_asn_length(buf, buf_size, i) < 0)
return -1;
return 0;
}
int
parse_snmp_version(u_char * buf, int buf_size, int *i)
{
int ret;
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x02) {
logfx("Unable to decode SNMP packet: snmp version invalid\n");
return -1;
}
if ((ret = parse_asn_integer(buf, buf_size, i)) == -1)
return -1;
else if (ret != 0) {
logfx("Unable to decode SNMP packet: snmp version invalid\n");
return -1;
}
return 0;
}
int
parse_snmp_community(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x04) {
logfx("Unable to decode SNMP packet: community name not found\n");
return -1;
}
logfx("[");
if (print_asn_string(buf, buf_size, i) == -1)
return -1;
logfx("] ");
return 0;
}
int
parse_snmp_pdu(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0xa2) {
logfx
("Unable to decode SNMP packet: PDU type not RESPONSE (0xa2)\n");
return -1;
}
if (parse_asn_length(buf, buf_size, i) < 0)
return -1;
return 0;
}
int
parse_snmp_requestid(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x02) {
logfx("Unable to decode SNMP packet: request id invalid\n");
return -1;
}
if (parse_asn_integer(buf, buf_size, i) < 0)
return -1;
return 0;
}
int
parse_snmp_errorcode(u_char * buf, int buf_size, int *i)
{
int ret;
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x02) {
logfx("Unable to decode SNMP packet: error code invalid\n");
return -1;
}
if ((ret = parse_asn_integer(buf, buf_size, i)) < 0)
return -1;
if (ret != 0) {
if (ret < 0 || ret > 18) {
logfx("Unable to decode SNMP packet: error code invalid\n");
return -1;
}
logfx("Host responded with error %s\n", snmp_errors[ret]);
return -1;
}
return 0;
}
int
parse_snmp_errorindex(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x02) {
logfx("Unable to decode SNMP packet: error index invalid\n");
return -1;
}
if (parse_asn_integer(buf, buf_size, i) < 0)
return -1;
return 0;
}
int
parse_snmp_objheader(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x30) {
logfx("Unable to decode SNMP packet: invalid object header\n");
return -1;
}
if (parse_asn_length(buf, buf_size, i) < 0)
return -1;
return 0;
}
int
parse_snmp_objheader6(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x06) {
logfx("Unable to decode SNMP packet: invalid object header\n");
return -1;
}
if (skip_asn_length(buf, buf_size, i) < 0)
return -1;
return 0;
}
int
parse_snmp_value(u_char * buf, int buf_size, int *i)
{
if (*i >= buf_size) {
logfx("Unable to decode SNMP packet: buffer overflow\n");
return -1;
}
if (buf[(*i)++] != 0x04) {
logfx("Unable to decode SNMP packet: invalid value\n");
return -1;
}
if (print_asn_string(buf, buf_size, i) < 0)
return -1;
return 0;
}
void
parse_snmp_response(u_char * buf, int buf_size)
{
int i;
i = 0;
if (parse_snmp_header(buf, buf_size, &i) == -1)
return;
if (parse_snmp_version(buf, buf_size, &i) == -1)
return;
if (parse_snmp_community(buf, buf_size, &i) == -1)
return;
if (parse_snmp_pdu(buf, buf_size, &i) == -1)
return;
if (parse_snmp_requestid(buf, buf_size, &i) == -1)
return;
if (parse_snmp_errorcode(buf, buf_size, &i) == -1)
return;
if (parse_snmp_errorindex(buf, buf_size, &i) == -1)
return;
/*
* Bug in an HP JetDirect
*/
if (i + 3 <= buf_size && buf[i] == 0x00 && buf[i + 1] == 0x30
&& buf[i + 2] == 0x20)
i += 3;
if (parse_snmp_objheader(buf, buf_size, &i) == -1)
return;
if (parse_snmp_objheader(buf, buf_size, &i) == -1)
return;
if (parse_snmp_objheader6(buf, buf_size, &i) == -1)
return;
if (parse_snmp_value(buf, buf_size, &i) == -1) {
// If value isn't parsed we still need a CR or the
// next response will be displayed on this line.
logfx("\n");
return;
}
logfx("\n");
}
/*
* Subtract the `struct timeval' values X and Y, storing the result in
* RESULT. Return 1 if the difference is negative, otherwise 0.
*/
inline int
timeval_subtract(struct timeval *result, struct timeval *x,
struct timeval *y)
{
int nsec;
/*
* Perform the carry for the later subtraction by updating y.
*/
if (x->tv_usec < y->tv_usec) {
nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
nsec = (x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
/*
* Compute the time remaining to wait. tv_usec is certainly positive.
*/
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/*
* Return 1 if result is negative.
*/
return x->tv_sec < y->tv_sec;
}
void
receive_snmp(int sock, long wait, struct sockaddr_in *remote_addr)
{
struct timeval tv_now,
tv_until,
tv_wait;
unsigned int remote_addr_len;
char buf[1500];
int ret;
fd_set fds;
gettimeofday(&tv_now, NULL);
tv_until.tv_sec = tv_now.tv_sec;
tv_until.tv_usec = tv_now.tv_usec + wait * 1000;
if (tv_until.tv_usec >= 1000000) {
tv_until.tv_sec += tv_until.tv_usec / 1000000;
tv_until.tv_usec = tv_until.tv_usec % 1000000;
}
tv_wait.tv_sec = wait / 1000;
tv_wait.tv_usec = wait % 1000 * 1000;
do {
/*
* Put the socket into the fd set
*/
FD_ZERO(&fds);
FD_SET(sock, &fds);
if ((ret = select(sock + 1, &fds, NULL, NULL, &tv_wait)) == -1) {
printf("Error in pselect\n");
exit(1);
} else if (ret > 0) {
memset(&buf, 0x0, sizeof(buf));
remote_addr_len = sizeof(*remote_addr);
ret =
recvfrom(sock, &buf, sizeof(buf), 0,
(struct sockaddr *) remote_addr,
&remote_addr_len);
if (ret < 0) {
printf("Error in recvfrom\n");
}
logfx("%s ", inet_ntoa(remote_addr->sin_addr));
parse_snmp_response((u_char *) & buf, ret);
if (o.log)
fflush(o.log_fd);
}
gettimeofday(&tv_now, NULL);
}
while (timeval_subtract(&tv_wait, &tv_until, &tv_now) == 0);
}
int
main(int argc, char *argv[])
{
struct sockaddr_in local_addr;
struct sockaddr_in remote_addr;
int sock;
int ret;
int c;
char sendbuf[1500],
combuf[128],
hostbuf[64];
int sendbuf_size,
hostfile = 1;
FILE *com,
*hostfd;
init_options(argc, argv);
/*
* socket creation
*/
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
printf("Error creating socket\n");
exit(1);
}
local_addr.sin_family = AF_INET;
local_addr.sin_addr.s_addr = htonl(INADDR_ANY);
local_addr.sin_port = htons(0);
ret = bind(sock, (struct sockaddr *) &local_addr, sizeof(local_addr));
if (ret < 0) {
printf("Error binding socket\n");
exit(1);
}
/*
* remote address
*/
remote_addr.sin_family = AF_INET;
remote_addr.sin_port = htons(o.port);
printf("Scanning %d hosts, %d communities, on port %s \n", host_count,
community_count,o.portStr);
/*
* iterate through communities
*/
/*
* community[] is pointer to char
*/
/*
* for (c=0; c < community_count; c++) {
*/
/*
* read community file, iterate
*/
if ((com = fopen(community_filename, "r")) == NULL) {
/*
* No communities file, use defaults
*/
printf("No communities file, using default\n");
}
if ((hostfd = fopen(input_filename, "r")) == NULL) {
printf("Cant open hosts file, scanning single host: %s\n",
singlehost);
hostfile = 0;
}
if (com != NULL) {
while (fgets(combuf, sizeof(combuf), com)) {
// Chop \n off end of combuf. Don't sscanf or community strings won't be allowed to contain spaces.
combuf[strlen(combuf) - 1] = '\0';
if (o.debug > 0)
printf("Trying community %s\n", combuf);
sendbuf_size =
build_snmp_req((char *) &sendbuf, sizeof(sendbuf), combuf);
/*
* now iterate hosts
*/
if (hostfd != NULL) {
while (fgets(hostbuf, sizeof(hostbuf), hostfd)) {
remote_addr.sin_addr.s_addr = inet_addr(hostbuf);
if (o.debug > 1)
printf("Sending to ip %s\n",
inet_ntoa(*(struct in_addr *) &remote_addr.
sin_addr.s_addr));
ret =
sendto(sock, &sendbuf, sendbuf_size, 0,
(struct sockaddr *) &remote_addr,
sizeof(remote_addr));
if (ret < 0) {
printf("Error in sendto while sending to %s: %s\n", inet_ntoa(*(struct in_addr *) &remote_addr.sin_addr.s_addr), strerror(errno));
/*
* exit(1);
*/
}
// receive packets and wait a bit
receive_snmp(sock, o.wait, &remote_addr);
}
rewind(hostfd);
} else { /* no hostfile */
remote_addr.sin_addr.s_addr = inet_addr(singlehost);
if (o.debug > 1)
printf("Sending to ip %s\n",
inet_ntoa(*(struct in_addr *) &remote_addr.
sin_addr.s_addr));
ret =
sendto(sock, &sendbuf, sendbuf_size, 0,
(struct sockaddr *) &remote_addr,
sizeof(remote_addr));
if (ret < 0) {
printf("Error in sendto while sending to %s: %s\n", inet_ntoa(*(struct in_addr *) &remote_addr.sin_addr.s_addr), strerror(errno));
/*
* exit(1);
*/
}
// receive packets and wait a bit
receive_snmp(sock, o.wait, &remote_addr);
}
}
} else { /* no comfile */
for (c = 0; c < community_count; c++) {
if (o.debug > 0)
printf("Trying community %s\n", community[c]);
sendbuf_size =
build_snmp_req((char *) &sendbuf, sizeof(sendbuf),
community[c]);
if (hostfd != NULL) {
while (fgets(hostbuf, sizeof(hostbuf), hostfd)) {
remote_addr.sin_addr.s_addr = inet_addr(hostbuf);