- 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
367
netmap-libpcap/pcap-nit.c
Normal file
367
netmap-libpcap/pcap-nit.c
Normal file
@ -0,0 +1,367 @@
|
||||
/*
|
||||
* Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include "config.h"
|
||||
#endif
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/timeb.h>
|
||||
#include <sys/file.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/socket.h>
|
||||
|
||||
#include <net/if.h>
|
||||
#include <net/nit.h>
|
||||
|
||||
#include <netinet/in.h>
|
||||
#include <netinet/in_systm.h>
|
||||
#include <netinet/ip.h>
|
||||
#include <netinet/if_ether.h>
|
||||
#include <netinet/ip_var.h>
|
||||
#include <netinet/udp.h>
|
||||
#include <netinet/udp_var.h>
|
||||
#include <netinet/tcp.h>
|
||||
#include <netinet/tcpip.h>
|
||||
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "pcap-int.h"
|
||||
|
||||
#ifdef HAVE_OS_PROTO_H
|
||||
#include "os-proto.h"
|
||||
#endif
|
||||
|
||||
/*
|
||||
* The chunk size for NIT. This is the amount of buffering
|
||||
* done for read calls.
|
||||
*/
|
||||
#define CHUNKSIZE (2*1024)
|
||||
|
||||
/*
|
||||
* The total buffer space used by NIT.
|
||||
*/
|
||||
#define BUFSPACE (4*CHUNKSIZE)
|
||||
|
||||
/* Forwards */
|
||||
static int nit_setflags(int, int, int, char *);
|
||||
|
||||
/*
|
||||
* Private data for capturing on NIT devices.
|
||||
*/
|
||||
struct pcap_nit {
|
||||
struct pcap_stat stat;
|
||||
};
|
||||
|
||||
static int
|
||||
pcap_stats_nit(pcap_t *p, struct pcap_stat *ps)
|
||||
{
|
||||
struct pcap_nit *pn = p->priv;
|
||||
|
||||
/*
|
||||
* "ps_recv" counts packets handed to the filter, not packets
|
||||
* that passed the filter. As filtering is done in userland,
|
||||
* this does not include packets dropped because we ran out
|
||||
* of buffer space.
|
||||
*
|
||||
* "ps_drop" presumably counts packets dropped by the socket
|
||||
* because of flow control requirements or resource exhaustion;
|
||||
* it doesn't count packets dropped by the interface driver.
|
||||
* As filtering is done in userland, it counts packets regardless
|
||||
* of whether they would've passed the filter.
|
||||
*
|
||||
* These statistics don't include packets not yet read from the
|
||||
* kernel by libpcap or packets not yet read from libpcap by the
|
||||
* application.
|
||||
*/
|
||||
*ps = pn->stat;
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
pcap_read_nit(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
|
||||
{
|
||||
struct pcap_nit *pn = p->priv;
|
||||
register int cc, n;
|
||||
register u_char *bp, *cp, *ep;
|
||||
register struct nit_hdr *nh;
|
||||
register int caplen;
|
||||
|
||||
cc = p->cc;
|
||||
if (cc == 0) {
|
||||
cc = read(p->fd, (char *)p->buffer, p->bufsize);
|
||||
if (cc < 0) {
|
||||
if (errno == EWOULDBLOCK)
|
||||
return (0);
|
||||
snprintf(p->errbuf, sizeof(p->errbuf), "pcap_read: %s",
|
||||
pcap_strerror(errno));
|
||||
return (-1);
|
||||
}
|
||||
bp = p->buffer;
|
||||
} else
|
||||
bp = p->bp;
|
||||
|
||||
/*
|
||||
* Loop through each packet. The increment expression
|
||||
* rounds up to the next int boundary past the end of
|
||||
* the previous packet.
|
||||
*/
|
||||
n = 0;
|
||||
ep = bp + cc;
|
||||
while (bp < ep) {
|
||||
/*
|
||||
* 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 {
|
||||
p->cc = ep - bp;
|
||||
p->bp = bp;
|
||||
return (n);
|
||||
}
|
||||
}
|
||||
|
||||
nh = (struct nit_hdr *)bp;
|
||||
cp = bp + sizeof(*nh);
|
||||
|
||||
switch (nh->nh_state) {
|
||||
|
||||
case NIT_CATCH:
|
||||
break;
|
||||
|
||||
case NIT_NOMBUF:
|
||||
case NIT_NOCLUSTER:
|
||||
case NIT_NOSPACE:
|
||||
pn->stat.ps_drop = nh->nh_dropped;
|
||||
continue;
|
||||
|
||||
case NIT_SEQNO:
|
||||
continue;
|
||||
|
||||
default:
|
||||
snprintf(p->errbuf, sizeof(p->errbuf),
|
||||
"bad nit state %d", nh->nh_state);
|
||||
return (-1);
|
||||
}
|
||||
++pn->stat.ps_recv;
|
||||
bp += ((sizeof(struct nit_hdr) + nh->nh_datalen +
|
||||
sizeof(int) - 1) & ~(sizeof(int) - 1));
|
||||
|
||||
caplen = nh->nh_wirelen;
|
||||
if (caplen > p->snapshot)
|
||||
caplen = p->snapshot;
|
||||
if (bpf_filter(p->fcode.bf_insns, cp, nh->nh_wirelen, caplen)) {
|
||||
struct pcap_pkthdr h;
|
||||
h.ts = nh->nh_timestamp;
|
||||
h.len = nh->nh_wirelen;
|
||||
h.caplen = caplen;
|
||||
(*callback)(user, &h, cp);
|
||||
if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) {
|
||||
p->cc = ep - bp;
|
||||
p->bp = bp;
|
||||
return (n);
|
||||
}
|
||||
}
|
||||
}
|
||||
p->cc = 0;
|
||||
return (n);
|
||||
}
|
||||
|
||||
static int
|
||||
pcap_inject_nit(pcap_t *p, const void *buf, size_t size)
|
||||
{
|
||||
struct sockaddr sa;
|
||||
int ret;
|
||||
|
||||
memset(&sa, 0, sizeof(sa));
|
||||
strncpy(sa.sa_data, device, sizeof(sa.sa_data));
|
||||
ret = sendto(p->fd, buf, size, 0, &sa, sizeof(sa));
|
||||
if (ret == -1) {
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send: %s",
|
||||
pcap_strerror(errno));
|
||||
return (-1);
|
||||
}
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static int
|
||||
nit_setflags(pcap_t *p)
|
||||
{
|
||||
struct nit_ioc nioc;
|
||||
|
||||
memset(&nioc, 0, sizeof(nioc));
|
||||
nioc.nioc_typetomatch = NT_ALLTYPES;
|
||||
nioc.nioc_snaplen = p->snapshot;
|
||||
nioc.nioc_bufalign = sizeof(int);
|
||||
nioc.nioc_bufoffset = 0;
|
||||
|
||||
if (p->opt.buffer_size != 0)
|
||||
nioc.nioc_bufspace = p->opt.buffer_size;
|
||||
else {
|
||||
/* Default buffer size */
|
||||
nioc.nioc_bufspace = BUFSPACE;
|
||||
}
|
||||
|
||||
if (p->opt.immediate) {
|
||||
/*
|
||||
* XXX - will this cause packets to be delivered immediately?
|
||||
* XXX - given that this is for SunOS prior to 4.0, do
|
||||
* we care?
|
||||
*/
|
||||
nioc.nioc_chunksize = 0;
|
||||
} else
|
||||
nioc.nioc_chunksize = CHUNKSIZE;
|
||||
if (p->opt.timeout != 0) {
|
||||
nioc.nioc_flags |= NF_TIMEOUT;
|
||||
nioc.nioc_timeout.tv_sec = p->opt.timeout / 1000;
|
||||
nioc.nioc_timeout.tv_usec = (p->opt.timeout * 1000) % 1000000;
|
||||
}
|
||||
if (p->opt.promisc)
|
||||
nioc.nioc_flags |= NF_PROMISC;
|
||||
|
||||
if (ioctl(p->fd, SIOCSNIT, &nioc) < 0) {
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "SIOCSNIT: %s",
|
||||
pcap_strerror(errno));
|
||||
return (-1);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
pcap_activate_nit(pcap_t *p)
|
||||
{
|
||||
int fd;
|
||||
struct sockaddr_nit snit;
|
||||
|
||||
if (p->opt.rfmon) {
|
||||
/*
|
||||
* No monitor mode on SunOS 3.x or earlier (no
|
||||
* Wi-Fi *devices* for the hardware that supported
|
||||
* them!).
|
||||
*/
|
||||
return (PCAP_ERROR_RFMON_NOTSUP);
|
||||
}
|
||||
|
||||
if (p->snapshot < 96)
|
||||
/*
|
||||
* NIT requires a snapshot length of at least 96.
|
||||
*/
|
||||
p->snapshot = 96;
|
||||
|
||||
memset(p, 0, sizeof(*p));
|
||||
p->fd = fd = socket(AF_NIT, SOCK_RAW, NITPROTO_RAW);
|
||||
if (fd < 0) {
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"socket: %s", pcap_strerror(errno));
|
||||
goto bad;
|
||||
}
|
||||
snit.snit_family = AF_NIT;
|
||||
(void)strncpy(snit.snit_ifname, p->opt.source, NITIFSIZ);
|
||||
|
||||
if (bind(fd, (struct sockaddr *)&snit, sizeof(snit))) {
|
||||
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
||||
"bind: %s: %s", snit.snit_ifname, pcap_strerror(errno));
|
||||
goto bad;
|
||||
}
|
||||
if (nit_setflags(p) < 0)
|
||||
goto bad;
|
||||
|
||||
/*
|
||||
* NIT supports only ethernets.
|
||||
*/
|
||||
p->linktype = DLT_EN10MB;
|
||||
|
||||
p->bufsize = BUFSPACE;
|
||||
p->buffer = (u_char *)malloc(p->bufsize);
|
||||
if (p->buffer == NULL) {
|
||||
strlcpy(p->errbuf, pcap_strerror(errno), PCAP_ERRBUF_SIZE);
|
||||
goto bad;
|
||||
}
|
||||
|
||||
/*
|
||||
* "p->fd" is a socket, so "select()" should work on it.
|
||||
*/
|
||||
p->selectable_fd = p->fd;
|
||||
|
||||
/*
|
||||
* This is (presumably) a real Ethernet capture; give it a
|
||||
* link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
|
||||
* that an application can let you choose it, in case you're
|
||||
* capturing DOCSIS traffic that a Cisco Cable Modem
|
||||
* Termination System is putting out onto an Ethernet (it
|
||||
* doesn't put an Ethernet header onto the wire, it puts raw
|
||||
* DOCSIS frames out on the wire inside the low-level
|
||||
* Ethernet framing).
|
||||
*/
|
||||
p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
|
||||
/*
|
||||
* If that fails, just leave the list empty.
|
||||
*/
|
||||
if (p->dlt_list != NULL) {
|
||||
p->dlt_list[0] = DLT_EN10MB;
|
||||
p->dlt_list[1] = DLT_DOCSIS;
|
||||
p->dlt_count = 2;
|
||||
}
|
||||
|
||||
p->read_op = pcap_read_nit;
|
||||
p->inject_op = pcap_inject_nit;
|
||||
p->setfilter_op = install_bpf_program; /* no kernel filtering */
|
||||
p->setdirection_op = NULL; /* Not implemented. */
|
||||
p->set_datalink_op = NULL; /* can't change data link type */
|
||||
p->getnonblock_op = pcap_getnonblock_fd;
|
||||
p->setnonblock_op = pcap_setnonblock_fd;
|
||||
p->stats_op = pcap_stats_nit;
|
||||
|
||||
return (0);
|
||||
bad:
|
||||
pcap_cleanup_live_common(p);
|
||||
return (PCAP_ERROR);
|
||||
}
|
||||
|
||||
pcap_t *
|
||||
pcap_create_interface(const char *device, char *ebuf)
|
||||
{
|
||||
pcap_t *p;
|
||||
|
||||
p = pcap_create_common(device, ebuf, sizeof (struct pcap_nit));
|
||||
if (p == NULL)
|
||||
return (NULL);
|
||||
|
||||
p->activate_op = pcap_activate_nit;
|
||||
return (p);
|
||||
}
|
||||
|
||||
int
|
||||
pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
|
||||
{
|
||||
return (0);
|
||||
}
|
||||
Reference in New Issue
Block a user