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|
/*
* Copyright (c) 2012 Red Hat.
* Copyright (c) 1995-2004 Silicon Graphics, Inc. All Rights Reserved.
*
* 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.
*/
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <syslog.h>
#include "./cisco.h"
extern int port;
int
conn_cisco(cisco_t * cp)
{
__pmFdSet wfds;
__pmSockAddr *myaddr;
void *enumIx;
int flags = 0;
int fd;
int ret;
fd = -1;
enumIx = NULL;
for (myaddr = __pmHostEntGetSockAddr(cp->hostinfo, &enumIx);
myaddr != NULL;
myaddr = __pmHostEntGetSockAddr(cp->hostinfo, &enumIx)) {
/* Create a socket */
if (__pmSockAddrIsInet(myaddr))
fd = __pmCreateSocket();
else if (__pmSockAddrIsIPv6(myaddr))
fd = __pmCreateIPv6Socket();
else
continue;
if (fd < 0) {
__pmSockAddrFree(myaddr);
continue; /* Try the next address */
}
/* Attempt to connect */
flags = __pmConnectTo(fd, myaddr, cp->port);
__pmSockAddrFree(myaddr);
if (flags < 0) {
/*
* Mark failure in case we fall out the end of the loop
* and try next address. fd has been closed in __pmConnectTo().
*/
setoserror(ECONNREFUSED);
fd = -1;
continue;
}
/* FNDELAY and we're in progress - wait on select */
__pmFD_ZERO(&wfds);
__pmFD_SET(fd, &wfds);
ret = __pmSelectWrite(fd+1, &wfds, NULL);
/* Was the connection successful? */
if (ret == 0)
setoserror(ETIMEDOUT);
else if (ret > 0) {
ret = __pmConnectCheckError(fd);
if (ret == 0)
break;
setoserror(ret);
}
/* Unsuccessful connection. */
__pmCloseSocket(fd);
fd = -1;
} /* loop over addresses */
if (fd == -1) {
fprintf(stderr, "conn_cisco(%s): connect: %s\n",
cp->host, netstrerror());
return -1;
}
fd = __pmConnectRestoreFlags(fd, flags);
if (fd < 0) {
fprintf(stderr, "conn_cisco(%s): setsockopt: %s\n",
cp->host, netstrerror());
return -1;
}
return fd;
}
static void
skip2eol(FILE *f)
{
int c;
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fprintf(stderr, "skip2eol:");
#endif
while ((c = fgetc(f)) != EOF) {
if (c == '\n')
break;
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fprintf(stderr, "%c", c);
#endif
}
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fputc('\n', stderr);
#endif
}
char *
mygetwd(FILE *f, char *prompt)
{
char *p;
int c;
static char buf[1024];
int len_prompt = strlen(prompt);
int found_prompt = 0;
p = buf;
while ((c = fgetc(f)) != EOF) {
if (c == '\r' || c == '\n' || c == ' ' || c == '\t') {
if (p == buf)
continue;
break;
}
*p++ = c;
if (p-buf >= len_prompt && strncmp(&p[-len_prompt], prompt, len_prompt) == 0) {
found_prompt = 1;
break;
}
}
*p = '\0';
if (feof(f)) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fprintf(stderr, "mygetwd: EOF fd=%d\n", fileno(f));
#endif
return NULL;
}
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fprintf(stderr, "mygetwd: fd=%d wd=\"%s\"%s\n", fileno(f), buf, found_prompt ? " [prompt]" : "");
#endif
return buf;
}
/*
* The CISCO "show interface" command output is parsed.
*
* See the file Samples for examples.
*
* The parser is a Finite State Automaton (FSA) that follows these
* rules:
*
* SHOW_INT style ... uses "show int <interface>" command
* state token next state
* NOISE <interface name> IN_REPORT
* IN_REPORT Description: skip rest of line, IN_REPORT
* IN_REPORT <prompt> DONE
* IN_REPORT minute RATE
* IN_REPORT second RATE
* IN_REPORT input, BYTES_IN
* IN_REPORT output, BYTES_OUT
* IN_REPORT BW BW
* RATE input skip next token, RATE_IN
* RATE output skip next token, RATE_OUT
* RATE_IN <number> (rate_in) IN_REPORT
* RATE_OUT <number> (rate_out) IN_REPORT
* BYTES_IN <number> (bytes_in) IN_REPORT
* BYTES_OUT <number> (bytes_out) IN_REPORT
* BW <number> (bandwidth) IN_REPORT
*
* SHOW_FRAME style ... uses "show frame pvc int <interface>" command
* state token next state
* NOISE <interface name> IN_REPORT
* IN_REPORT Description: skip rest of line, IN_REPORT
* IN_REPORT <prompt> DONE
* IN_REPORT 1st bytes BYTES_IN
* IN_REPORT 2nd bytes BYTES_OUT
* IN_REPORT 3rd bytes BYTES_OUT_BCAST
* BYTES_IN <number> (bytes_in) IN_REPORT
* BYTES_OUT <number> (bytes_out) IN_REPORT
* BYTES_OUT_BCAST <number> (bytes_out_bcast) IN_REPORT
*
* Note lines are terminated with \r
*/
#define DONE -1
#define NOISE 0
#define IN_REPORT 1
#define RATE 2
#define RATE_IN 3
#define RATE_OUT 4
#define BYTES_IN 5
#define BYTES_OUT 6
#define BW 7
#define BYTES_OUT_BCAST 8
#ifdef PCP_DEBUG
static char *statestr[] = {
"done", "noise", "in_report",
"rate", "rate_in", "rate_out", "bytes_in", "bytes_out", "bw",
"bytes_out_bcast"
};
#endif
int
dousername(cisco_t *cp, char **pw_prompt)
{
char *w;
int len, done = 0;
int len_prompt = strlen(cp->prompt);
for ( ; ; ) {
w = mygetwd(cp->fin, cp->prompt);
if (w == NULL)
break;
if (strlen(w) >= len_prompt && strncmp(&w[strlen(w)-len_prompt], cp->prompt, len_prompt) == 0)
break;
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0)
fprintf(stderr, "Username:? got - %s\n", w);
#endif
if (strcmp(w, USERPROMPT) == 0) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send username: %s\n", cp->username);
}
#endif
fprintf(cp->fout, "%s\n", cp->username);
fflush(cp->fout);
for ( ; ; ) {
w = mygetwd(cp->fin, cp->prompt);
if (w == NULL || strcmp(w, USERPROMPT) == 0)
/* closed connection or Username re-prompt */
break;
len = strlen(w);
if ((len >= len_prompt && strncmp(&w[len-len_prompt], cp->prompt, len_prompt) == 0) ||
w[len-1] == ':') {
/* command prompt or passwd */
if (w[len-1] == ':')
*pw_prompt = w;
done = 1;
break;
}
}
break;
}
}
if (done == 0) {
fprintf(stderr, "Error: Cisco username negotiation failed for \"%s\"\n",
cp->host);
fprintf(stderr,
"To check that a username is required, enter the following command:\n"
" $ telnet %s\n"
"If the prompt \"%s\" does not appear, no username is required.\n"
"Otherwise, enter the username \"%s\" to check that this\n"
"is correct.\n",
cp->host, USERPROMPT, cp->username);
}
return done;
}
int
dopasswd(cisco_t *cp, char *pw_prompt)
{
char *w;
int done = 0;
int len_prompt = strlen(cp->prompt);
for ( ; ; ) {
if (pw_prompt) /* dousername may have read passwd prompt */
w = pw_prompt;
else
w = mygetwd(cp->fin, cp->prompt);
pw_prompt = NULL;
if (w == NULL)
break;
if (strlen(w) >= len_prompt && strncmp(&w[strlen(w)-len_prompt], cp->prompt, len_prompt) == 0)
break;
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0)
fprintf(stderr, "Password:? got - %s\n", w);
#endif
if (strcmp(w, PWPROMPT) == 0) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send passwd: %s\n", cp->passwd);
}
#endif
fprintf(cp->fout, "%s\n", cp->passwd);
fflush(cp->fout);
for ( ; ; ) {
w = mygetwd(cp->fin, cp->prompt);
if (w == NULL || strcmp(w, PWPROMPT) == 0)
/* closed connection or user-level password re-prompt */
break;
if (strlen(w) >= len_prompt && strncmp(&w[strlen(w)-len_prompt], cp->prompt, len_prompt) == 0) {
/* command prompt */
done = 1;
break;
}
}
break;
}
}
if (done == 0) {
fprintf(stderr, "Error: Cisco user-level password negotiation failed for \"%s\"\n",
cp->host);
fprintf(stderr,
"To check that a user-level password is required, enter the following command:\n"
" $ telnet %s\n"
"If the prompt \"%s\" does not appear, no user-level password is required.\n"
"Otherwise, enter the user-level password \"%s\" to check that this\n"
"is correct.\n",
cp->host, PWPROMPT, cp->passwd);
}
return done;
}
static int timeout;
void
onalarm(int dummy)
{
timeout = 1;
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0) {
fprintf(stderr, "Alarm timeout!\n");
}
#endif
}
static int
get_fr_bw(cisco_t *cp, char *interface)
{
int state = NOISE;
int bandwidth = -1;
char *w;
int len_prompt = strlen(cp->prompt);
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send: s%s\n", interface);
}
#endif
fprintf(cp->fout, "show int s%s\n", interface);
fflush(cp->fout);
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fprintf(stderr, "BW Parse:");
#endif
while (state != DONE) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2)
fprintf(stderr, "[%s] ", statestr[state+1]);
#endif
w = mygetwd(cp->fin, cp->prompt);
if (w == NULL || timeout) {
/*
* End of File (telenet timeout?)
*/
alarm(0);
return -1;
}
switch (state) {
case NOISE:
if (strncmp(w, "Serial", 6) == 0 && strcmp(&w[6], interface) == 0)
state = IN_REPORT;
break;
case IN_REPORT:
if (strcmp(w, "Description:") == 0)
skip2eol(cp->fin);
else if (strlen(w) >= len_prompt && strncmp(&w[strlen(w)-len_prompt], cp->prompt, len_prompt) == 0)
state = DONE;
else if (strcmp(w, "BW") == 0)
state = BW;
break;
case BW:
sscanf(w, "%d", &bandwidth);
bandwidth *= 1000; /* Kbit -> bytes/sec */
bandwidth /= 8;
state = IN_REPORT;
break;
}
}
alarm(0);
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0) {
fprintf(stderr, "Extracted bandwidth: %d bytes/sec\n", bandwidth);
}
#endif
return bandwidth;
}
#define SHOW_INT 1
#define SHOW_FRAME 2
int
grab_cisco(intf_t *ip)
{
int style;
int next_state;
int state = NOISE;
int skip = 0;
int i;
int namelen;
char *pw_prompt = NULL;
char *w;
int fd;
int fd2;
int nval = 0;
cisco_t *cp = ip->cp;
intf_t tmp;
int len_prompt = strlen(cp->prompt);
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0) {
fprintf(stderr, "grab_cisco(%s:%s):\n", cp->host, ip->interface);
}
#endif
tmp.bandwidth = tmp.rate_in = tmp.rate_out = -1;
tmp.bytes_in = tmp.bytes_out = tmp.bytes_out_bcast = -1;
if (cp->fin == NULL) {
fd = conn_cisco(cp);
if (fd < 0) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0)
fprintf(stderr, "grab_cisco(%s:%s): connect failed: %s\n",
cp->host, ip->interface, netstrerror());
#endif
return -1;
}
else {
cp->fin = fdopen (fd, "r");
if ((fd2 = dup(fd)) < 0) {
perror("dup");
exit(1);
}
cp->fout = fdopen (fd2, "w");
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0) {
fprintf(stderr, "grab_cisco(%s:%s): connected fin=%d fout=%d",
cp->host, ip->interface, fileno(cp->fin), fileno(cp->fout));
if (cp->username != NULL)
fprintf(stderr, " username=%s", cp->username);
else
fprintf(stderr, " NO username");
if (cp->passwd != NULL)
fprintf(stderr, " passwd=%s", cp->passwd);
else
fprintf(stderr, " NO passwd");
fputc('\n', stderr);
}
#endif
if (cp->username != NULL) {
/*
* Username stuff ...
*/
if (dousername(cp, &pw_prompt) == 0) {
fclose(cp->fin);
fclose(cp->fout);
cp->fin = cp->fout = NULL;
return -1;
}
}
if (cp->passwd != NULL) {
/*
* User-level password stuff ...
*/
if (dopasswd(cp, pw_prompt) == 0) {
fclose(cp->fin);
fclose(cp->fout);
cp->fin = cp->fout = NULL;
return -1;
}
}
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send: \n");
}
#endif
fprintf(cp->fout, "\n");
fflush(cp->fout);
}
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send: terminal length 0\n");
}
#endif
fprintf(cp->fout, "terminal length 0\n");
fflush(cp->fout);
}
timeout = 0;
signal(SIGALRM, onalarm);
/*
* Choice of timeout here is somewhat arbitrary ... for a long
* time this was 5 (seconds), but then testing with an entry
* level Model 800 ADSL router revealed that up to 20 seconds
* was required to generate the expected output.
*/
alarm(20);
style = SHOW_INT; /* default Cisco command */
if (ip->interface[0] == 's' && strchr(ip->interface, '.') != NULL) {
/*
* Frame-relay PVC on subinterface for s2/3.7 style interface name
*/
style = SHOW_FRAME;
if (ip->bandwidth == -2) {
/*
* one-trip initialzation ... need show int s2/3.7 to
* get bandwidth
*/
ip->bandwidth = get_fr_bw(cp, &ip->interface[1]);
}
tmp.bandwidth = ip->bandwidth;
if (tmp.bandwidth != -1)
nval++;
}
if (style == SHOW_FRAME) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send: show frame pvc int s%s\n", &ip->interface[1]);
}
#endif
fprintf(cp->fout, "show frame pvc int s%s\n", &ip->interface[1]);
next_state = BYTES_IN;
}
else {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL1) {
fprintf(stderr, "Send: show int %s\n", ip->interface);
}
#endif
fprintf(cp->fout, "show int %s\n", ip->interface);
}
fflush(cp->fout);
state = NOISE;
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2) {
fprintf(stderr, "Parse:");
fflush(stderr);
}
#endif
while (state != DONE) {
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL2) {
fprintf(stderr, "[%s] ", statestr[state+1]);
fflush(stderr);
}
#endif
w = mygetwd(cp->fin, cp->prompt);
if (w == NULL || timeout) {
/*
* End of File (telenet timeout?)
* ... mark as closed, and try again at next request
*/
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0)
fprintf(stderr, "grab_cisco(%s:%s): forced disconnect fin=%d\n",
cp->host, ip->interface, fileno(cp->fin));
#endif
fclose(cp->fin);
fclose(cp->fout);
cp->fin = cp->fout = NULL;
alarm(0);
return -1;
}
switch (state) {
case NOISE:
for (i = 0; i < num_intf_tab; i++) {
namelen = strlen(intf_tab[i].name);
if (strncmp(w, intf_tab[i].name, namelen) == 0) {
state = IN_REPORT;
break;
}
}
break;
case IN_REPORT:
if (strcmp(w, "Description:") == 0)
skip2eol(cp->fin);
if (strlen(w) >= len_prompt && strncmp(&w[strlen(w)-len_prompt], cp->prompt, len_prompt) == 0)
state = DONE;
else if (style == SHOW_INT) {
if (strcmp(w, "minute") == 0 || strcmp(w, "second") == 0)
state = RATE;
else if (strcmp(w, "input,") == 0)
state = BYTES_IN;
else if (strcmp(w, "output,") == 0)
state = BYTES_OUT;
else if (strcmp(w, "BW") == 0)
state = BW;
}
else if (style == SHOW_FRAME) {
if (strcmp(w, "bytes") == 0) {
if (next_state == BYTES_IN) {
state = BYTES_IN;
next_state = BYTES_OUT;
}
else if (next_state == BYTES_OUT) {
state = BYTES_OUT;
next_state = BYTES_OUT_BCAST;
}
else if (next_state == BYTES_OUT_BCAST) {
state = BYTES_OUT_BCAST;
next_state = IN_REPORT;
}
else
state = next_state;
}
}
break;
case RATE:
if (strcmp(w, "input") == 0) {
skip = 1;
state = RATE_IN;
}
else if (strcmp(w, "output") == 0) {
skip = 1;
state = RATE_OUT;
}
break;
case RATE_IN:
if (skip-- == 0) {
tmp.rate_in = atol(w) / 8;
nval++;
state = IN_REPORT;
}
break;
case RATE_OUT:
if (skip-- == 0) {
tmp.rate_out = atol(w) / 8;
nval++;
state = IN_REPORT;
}
break;
case BYTES_IN:
tmp.bytes_in = strtoull(w, NULL, 10);
nval++;
state = IN_REPORT;
break;
case BYTES_OUT:
tmp.bytes_out = strtoull(w, NULL, 10);
nval++;
state = IN_REPORT;
break;
case BYTES_OUT_BCAST:
tmp.bytes_out_bcast = strtoull(w, NULL, 10);
nval++;
state = IN_REPORT;
break;
case BW:
sscanf(w, "%d", &tmp.bandwidth);
tmp.bandwidth *= 1000; /* Kbit -> bytes/sec */
tmp.bandwidth /= 8;
nval++;
state = IN_REPORT;
break;
}
}
alarm(0);
#ifdef PCP_DEBUG
if (pmDebug & DBG_TRACE_APPL0) {
fprintf(stderr, "Extracted %d values ...\n", nval);
if (tmp.bandwidth != 0xffffffff)
fprintf(stderr, "bandwidth: %d bytes/sec\n", tmp.bandwidth);
else
fprintf(stderr, "bandwidth: ? bytes/sec\n");
fprintf(stderr, "recent rate (bytes/sec):");
if (tmp.rate_in != 0xffffffff)
fprintf(stderr, " %d in", tmp.rate_in);
else
fprintf(stderr, " ? in");
if (tmp.rate_out != 0xffffffff)
fprintf(stderr, " %d out", tmp.rate_out);
else
fprintf(stderr, " ? out");
fprintf(stderr, "\ntotal bytes:");
if (tmp.bytes_in != 0xffffffffffffffffLL)
fprintf(stderr, " %llu in", (unsigned long long)tmp.bytes_in);
else
fprintf(stderr, " ? in");
if (tmp.bytes_out != 0xffffffffffffffffLL)
fprintf(stderr, " %llu out", (unsigned long long)tmp.bytes_out);
else
fprintf(stderr, " ? out");
if (tmp.bytes_out_bcast != 0xffffffffffffffffLL)
fprintf(stderr, " %llu out_bcast", (unsigned long long)tmp.bytes_out_bcast);
else
fprintf(stderr, " ? out_bcast");
fprintf(stderr, "\n\n");
}
#endif
/* pretend this is atomic */
ip->bandwidth = tmp.bandwidth;
ip->rate_in = tmp.rate_in;
ip->rate_out = tmp.rate_out;
ip->bytes_in = tmp.bytes_in;
ip->bytes_out = tmp.bytes_out;
ip->bytes_out_bcast = tmp.bytes_out_bcast;
return nval;
}
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