- add netmap-libpcap
- add netmap (FreeBSD header files need to be updated with this) - move prototype perl scripts to prototype/ folder - create basic structure for sipcap app (no code yet)
This commit is contained in:
farrokhi
411
netmap-libpcap/savefile.c
Normal file
411
netmap-libpcap/savefile.c
Normal file
@ -0,0 +1,411 @@
|
||||
/*
|
||||
* Copyright (c) 1993, 1994, 1995, 1996, 1997
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that: (1) source code distributions
|
||||
* retain the above copyright notice and this paragraph in its entirety, (2)
|
||||
* distributions including binary code include the above copyright notice and
|
||||
* this paragraph in its entirety in the documentation or other materials
|
||||
* provided with the distribution, and (3) all advertising materials mentioning
|
||||
* features or use of this software display the following acknowledgement:
|
||||
* ``This product includes software developed by the University of California,
|
||||
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
||||
* the University nor the names of its contributors may be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
||||
*
|
||||
* savefile.c - supports offline use of tcpdump
|
||||
* Extraction/creation by Jeffrey Mogul, DECWRL
|
||||
* Modified by Steve McCanne, LBL.
|
||||
*
|
||||
* Used to save the received packet headers, after filtering, to
|
||||
* a file, and then read them later.
|
||||
* The first record in the file contains saved values for the machine
|
||||
* dependent values so we can print the dump file on any architecture.
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include "config.h"
|
||||
#endif
|
||||
|
||||
#ifdef WIN32
|
||||
#include <pcap-stdinc.h>
|
||||
#else /* WIN32 */
|
||||
#if HAVE_INTTYPES_H
|
||||
#include <inttypes.h>
|
||||
#elif HAVE_STDINT_H
|
||||
#include <stdint.h>
|
||||
#endif
|
||||
#ifdef HAVE_SYS_BITYPES_H
|
||||
#include <sys/bitypes.h>
|
||||
#endif
|
||||
#include <sys/types.h>
|
||||
#endif /* WIN32 */
|
||||
|
||||
#include <errno.h>
|
||||
#include <memory.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "pcap-int.h"
|
||||
#include "pcap/usb.h"
|
||||
|
||||
#ifdef HAVE_OS_PROTO_H
|
||||
#include "os-proto.h"
|
||||
#endif
|
||||
|
||||
#include "sf-pcap.h"
|
||||
#include "sf-pcap-ng.h"
|
||||
|
||||
/*
|
||||
* Setting O_BINARY on DOS/Windows is a bit tricky
|
||||
*/
|
||||
#if defined(WIN32)
|
||||
#define SET_BINMODE(f) _setmode(_fileno(f), _O_BINARY)
|
||||
#elif defined(MSDOS)
|
||||
#if defined(__HIGHC__)
|
||||
#define SET_BINMODE(f) setmode(f, O_BINARY)
|
||||
#else
|
||||
#define SET_BINMODE(f) setmode(fileno(f), O_BINARY)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
static int
|
||||
sf_getnonblock(pcap_t *p, char *errbuf)
|
||||
{
|
||||
/*
|
||||
* This is a savefile, not a live capture file, so never say
|
||||
* it's in non-blocking mode.
|
||||
*/
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
sf_setnonblock(pcap_t *p, int nonblock, char *errbuf)
|
||||
{
|
||||
/*
|
||||
* This is a savefile, not a live capture file, so reject
|
||||
* requests to put it in non-blocking mode. (If it's a
|
||||
* pipe, it could be put in non-blocking mode, but that
|
||||
* would significantly complicate the code to read packets,
|
||||
* as it would have to handle reading partial packets and
|
||||
* keeping the state of the read.)
|
||||
*/
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"Savefiles cannot be put into non-blocking mode");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
static int
|
||||
sf_stats(pcap_t *p, struct pcap_stat *ps)
|
||||
{
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"Statistics aren't available from savefiles");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
static int
|
||||
sf_setbuff(pcap_t *p, int dim)
|
||||
{
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"The kernel buffer size cannot be set while reading from a file");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
static int
|
||||
sf_setmode(pcap_t *p, int mode)
|
||||
{
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"impossible to set mode while reading from a file");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
static int
|
||||
sf_setmintocopy(pcap_t *p, int size)
|
||||
{
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"The mintocopy parameter cannot be set while reading from a file");
|
||||
return (-1);
|
||||
}
|
||||
#endif
|
||||
|
||||
static int
|
||||
sf_inject(pcap_t *p, const void *buf _U_, size_t size _U_)
|
||||
{
|
||||
strlcpy(p->errbuf, "Sending packets isn't supported on savefiles",
|
||||
PCAP_ERRBUF_SIZE);
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set direction flag: Which packets do we accept on a forwarding
|
||||
* single device? IN, OUT or both?
|
||||
*/
|
||||
static int
|
||||
sf_setdirection(pcap_t *p, pcap_direction_t d)
|
||||
{
|
||||
snprintf(p->errbuf, sizeof(p->errbuf),
|
||||
"Setting direction is not supported on savefiles");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
void
|
||||
sf_cleanup(pcap_t *p)
|
||||
{
|
||||
if (p->rfile != stdin)
|
||||
(void)fclose(p->rfile);
|
||||
if (p->buffer != NULL)
|
||||
free(p->buffer);
|
||||
pcap_freecode(&p->fcode);
|
||||
}
|
||||
|
||||
pcap_t *
|
||||
pcap_open_offline_with_tstamp_precision(const char *fname, u_int precision,
|
||||
char *errbuf)
|
||||
{
|
||||
FILE *fp;
|
||||
pcap_t *p;
|
||||
|
||||
if (fname[0] == '-' && fname[1] == '\0')
|
||||
{
|
||||
fp = stdin;
|
||||
#if defined(WIN32) || defined(MSDOS)
|
||||
/*
|
||||
* We're reading from the standard input, so put it in binary
|
||||
* mode, as savefiles are binary files.
|
||||
*/
|
||||
SET_BINMODE(fp);
|
||||
#endif
|
||||
}
|
||||
else {
|
||||
#if !defined(WIN32) && !defined(MSDOS)
|
||||
fp = fopen(fname, "r");
|
||||
#else
|
||||
fp = fopen(fname, "rb");
|
||||
#endif
|
||||
if (fp == NULL) {
|
||||
snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", fname,
|
||||
pcap_strerror(errno));
|
||||
return (NULL);
|
||||
}
|
||||
}
|
||||
p = pcap_fopen_offline_with_tstamp_precision(fp, precision, errbuf);
|
||||
if (p == NULL) {
|
||||
if (fp != stdin)
|
||||
fclose(fp);
|
||||
}
|
||||
return (p);
|
||||
}
|
||||
|
||||
pcap_t *
|
||||
pcap_open_offline(const char *fname, char *errbuf)
|
||||
{
|
||||
return (pcap_open_offline_with_tstamp_precision(fname,
|
||||
PCAP_TSTAMP_PRECISION_MICRO, errbuf));
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
pcap_t* pcap_hopen_offline_with_tstamp_precision(intptr_t osfd, u_int precision,
|
||||
char *errbuf)
|
||||
{
|
||||
int fd;
|
||||
FILE *file;
|
||||
|
||||
fd = _open_osfhandle(osfd, _O_RDONLY);
|
||||
if ( fd < 0 )
|
||||
{
|
||||
snprintf(errbuf, PCAP_ERRBUF_SIZE, pcap_strerror(errno));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
file = _fdopen(fd, "rb");
|
||||
if ( file == NULL )
|
||||
{
|
||||
snprintf(errbuf, PCAP_ERRBUF_SIZE, pcap_strerror(errno));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return pcap_fopen_offline_with_tstamp_precision(file, precision,
|
||||
errbuf);
|
||||
}
|
||||
|
||||
pcap_t* pcap_hopen_offline(intptr_t osfd, char *errbuf)
|
||||
{
|
||||
return pcap_hopen_offline_with_tstamp_precision(osfd,
|
||||
PCAP_TSTAMP_PRECISION_MICRO, errbuf);
|
||||
}
|
||||
#endif
|
||||
|
||||
static pcap_t *(*check_headers[])(bpf_u_int32, FILE *, u_int, char *, int *) = {
|
||||
pcap_check_header,
|
||||
pcap_ng_check_header
|
||||
};
|
||||
|
||||
#define N_FILE_TYPES (sizeof check_headers / sizeof check_headers[0])
|
||||
|
||||
#ifdef WIN32
|
||||
static
|
||||
#endif
|
||||
pcap_t *
|
||||
pcap_fopen_offline_with_tstamp_precision(FILE *fp, u_int precision,
|
||||
char *errbuf)
|
||||
{
|
||||
register pcap_t *p;
|
||||
bpf_u_int32 magic;
|
||||
size_t amt_read;
|
||||
u_int i;
|
||||
int err;
|
||||
|
||||
/*
|
||||
* Read the first 4 bytes of the file; the network analyzer dump
|
||||
* file formats we support (pcap and pcap-ng), and several other
|
||||
* formats we might support in the future (such as snoop, DOS and
|
||||
* Windows Sniffer, and Microsoft Network Monitor) all have magic
|
||||
* numbers that are unique in their first 4 bytes.
|
||||
*/
|
||||
amt_read = fread((char *)&magic, 1, sizeof(magic), fp);
|
||||
if (amt_read != sizeof(magic)) {
|
||||
if (ferror(fp)) {
|
||||
snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
||||
"error reading dump file: %s",
|
||||
pcap_strerror(errno));
|
||||
} else {
|
||||
snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
||||
"truncated dump file; tried to read %lu file header bytes, only got %lu",
|
||||
(unsigned long)sizeof(magic),
|
||||
(unsigned long)amt_read);
|
||||
}
|
||||
return (NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Try all file types.
|
||||
*/
|
||||
for (i = 0; i < N_FILE_TYPES; i++) {
|
||||
p = (*check_headers[i])(magic, fp, precision, errbuf, &err);
|
||||
if (p != NULL) {
|
||||
/* Yup, that's it. */
|
||||
goto found;
|
||||
}
|
||||
if (err) {
|
||||
/*
|
||||
* Error trying to read the header.
|
||||
*/
|
||||
return (NULL);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Well, who knows what this mess is....
|
||||
*/
|
||||
snprintf(errbuf, PCAP_ERRBUF_SIZE, "unknown file format");
|
||||
return (NULL);
|
||||
|
||||
found:
|
||||
p->rfile = fp;
|
||||
|
||||
/* Padding only needed for live capture fcode */
|
||||
p->fddipad = 0;
|
||||
|
||||
#if !defined(WIN32) && !defined(MSDOS)
|
||||
/*
|
||||
* You can do "select()" and "poll()" on plain files on most
|
||||
* platforms, and should be able to do so on pipes.
|
||||
*
|
||||
* You can't do "select()" on anything other than sockets in
|
||||
* Windows, so, on Win32 systems, we don't have "selectable_fd".
|
||||
*/
|
||||
p->selectable_fd = fileno(fp);
|
||||
#endif
|
||||
|
||||
p->read_op = pcap_offline_read;
|
||||
p->inject_op = sf_inject;
|
||||
p->setfilter_op = install_bpf_program;
|
||||
p->setdirection_op = sf_setdirection;
|
||||
p->set_datalink_op = NULL; /* we don't support munging link-layer headers */
|
||||
p->getnonblock_op = sf_getnonblock;
|
||||
p->setnonblock_op = sf_setnonblock;
|
||||
p->stats_op = sf_stats;
|
||||
#ifdef WIN32
|
||||
p->setbuff_op = sf_setbuff;
|
||||
p->setmode_op = sf_setmode;
|
||||
p->setmintocopy_op = sf_setmintocopy;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* For offline captures, the standard one-shot callback can
|
||||
* be used for pcap_next()/pcap_next_ex().
|
||||
*/
|
||||
p->oneshot_callback = pcap_oneshot;
|
||||
|
||||
p->activated = 1;
|
||||
|
||||
return (p);
|
||||
}
|
||||
|
||||
#ifdef WIN32
|
||||
static
|
||||
#endif
|
||||
pcap_t *
|
||||
pcap_fopen_offline(FILE *fp, char *errbuf)
|
||||
{
|
||||
return (pcap_fopen_offline_with_tstamp_precision(fp,
|
||||
PCAP_TSTAMP_PRECISION_MICRO, errbuf));
|
||||
}
|
||||
|
||||
/*
|
||||
* Read packets from a capture file, and call the callback for each
|
||||
* packet.
|
||||
* If cnt > 0, return after 'cnt' packets, otherwise continue until eof.
|
||||
*/
|
||||
int
|
||||
pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
|
||||
{
|
||||
struct bpf_insn *fcode;
|
||||
int status = 0;
|
||||
int n = 0;
|
||||
u_char *data;
|
||||
|
||||
while (status == 0) {
|
||||
struct pcap_pkthdr h;
|
||||
|
||||
/*
|
||||
* Has "pcap_breakloop()" been called?
|
||||
* If so, return immediately - if we haven't read any
|
||||
* packets, clear the flag and return -2 to indicate
|
||||
* that we were told to break out of the loop, otherwise
|
||||
* leave the flag set, so that the *next* call will break
|
||||
* out of the loop without having read any packets, and
|
||||
* return the number of packets we've processed so far.
|
||||
*/
|
||||
if (p->break_loop) {
|
||||
if (n == 0) {
|
||||
p->break_loop = 0;
|
||||
return (-2);
|
||||
} else
|
||||
return (n);
|
||||
}
|
||||
|
||||
status = p->next_packet_op(p, &h, &data);
|
||||
if (status) {
|
||||
if (status == 1)
|
||||
return (0);
|
||||
return (status);
|
||||
}
|
||||
|
||||
if ((fcode = p->fcode.bf_insns) == NULL ||
|
||||
bpf_filter(fcode, data, h.len, h.caplen)) {
|
||||
(*callback)(user, &h, data);
|
||||
if (++n >= cnt && cnt > 0)
|
||||
break;
|
||||
}
|
||||
}
|
||||
/*XXX this breaks semantics tcpslice expects */
|
||||
return (n);
|
||||
}
|
||||
Reference in New Issue
Block a user