#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/libpcap/pcap-libdlpi.c,v 1.1.2.6 2008-04-14 20:41:52 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/bufmod.h>
#include <sys/stream.h>
#include <libdlpi.h>
#include <errno.h>
#include <memory.h>
#include <stropts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pcap-int.h"
#include "dlpisubs.h"
static int pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *);
static int pcap_inject_libdlpi(pcap_t *, const void *, size_t);
static void pcap_close_libdlpi(pcap_t *);
static void pcap_libdlpi_err(const char *, const char *, int, char *);
static boolean_t list_interfaces(const char *, void *);
typedef struct linknamelist {
char linkname[DLPI_LINKNAME_MAX];
struct linknamelist *lnl_next;
} linknamelist_t;
typedef struct linkwalk {
linknamelist_t *lw_list;
int lw_err;
} linkwalk_t;
static boolean_t
list_interfaces(const char *linkname, void *arg)
{
linkwalk_t *lwp = arg;
linknamelist_t *entry;
if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) {
lwp->lw_err = ENOMEM;
return (B_TRUE);
}
(void) strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX);
if (lwp->lw_list == NULL) {
lwp->lw_list = entry;
} else {
entry->lnl_next = lwp->lw_list;
lwp->lw_list = entry;
}
return (B_FALSE);
}
static int
pcap_activate_libdlpi(pcap_t *p)
{
int retv;
dlpi_handle_t dh;
dlpi_info_t dlinfo;
int err = PCAP_ERROR;
retv = dlpi_open(p->opt.source, &dh, DLPI_RAW|DLPI_PASSIVE);
if (retv != DLPI_SUCCESS) {
if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK)
err = PCAP_ERROR_NO_SUCH_DEVICE;
else if (retv == DLPI_SYSERR && errno == EACCES)
err = PCAP_ERROR_PERM_DENIED;
pcap_libdlpi_err(p->opt.source, "dlpi_open", retv,
p->errbuf);
return (err);
}
p->dlpi_hd = dh;
if (p->opt.rfmon) {
err = PCAP_ERROR_RFMON_NOTSUP;
goto bad;
}
if ((retv = dlpi_bind(p->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
pcap_libdlpi_err(p->opt.source, "dlpi_bind", retv, p->errbuf);
goto bad;
}
if (p->opt.promisc) {
retv = dlpi_promiscon(p->dlpi_hd, DL_PROMISC_PHYS);
if (retv != DLPI_SUCCESS) {
pcap_libdlpi_err(p->opt.source,
"dlpi_promisc(PHYSICAL)", retv, p->errbuf);
goto bad;
}
} else {
retv = dlpi_promiscon(p->dlpi_hd, DL_PROMISC_MULTI);
if (retv != DLPI_SUCCESS) {
pcap_libdlpi_err(p->opt.source, "dlpi_promisc(MULTI)",
retv, p->errbuf);
goto bad;
}
}
if ((retv = dlpi_promiscon(p->dlpi_hd, DL_PROMISC_SAP)) != DLPI_SUCCESS) {
if (!promisc) {
pcap_libdlpi_err(p->opt.source, "dlpi_promisc(SAP)",
retv, p->errbuf);
goto bad;
}
fprintf(stderr, "WARNING: dlpi_promisc(SAP) failed on"
" %s:(%s)\n", p->opt.source, dlpi_strerror(retv));
}
if ((retv = dlpi_info(p->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
pcap_libdlpi_err(p->opt.source, "dlpi_info", retv, p->errbuf);
goto bad;
}
if (pcap_process_mactype(p, dlinfo.di_mactype) != 0)
goto bad;
p->fd = dlpi_fd(p->dlpi_hd);
if (pcap_conf_bufmod(p, snaplen, p->md.timeout) != 0)
goto bad;
if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
pcap_strerror(errno));
goto bad;
}
if (pcap_alloc_databuf(p) != 0)
goto bad;
p->selectable_fd = p->fd;
p->read_op = pcap_read_libdlpi;
p->inject_op = pcap_inject_libdlpi;
p->setfilter_op = install_bpf_program;
p->setdirection_op = NULL;
p->set_datalink_op = NULL;
p->getnonblock_op = pcap_getnonblock_fd;
p->setnonblock_op = pcap_setnonblock_fd;
p->stats_op = pcap_stats_dlpi;
p->cleanup_op = pcap_cleanup_libdlpi;
return (0);
bad:
pcap_cleanup_libdlpi(p);
return (err);
}
int
pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
{
int retv = 0;
linknamelist_t *entry, *next;
linkwalk_t lw = {NULL, 0};
int save_errno;
dlpi_walk(list_interfaces, &lw, 0);
if (lw.lw_err != 0) {
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"dlpi_walk: %s", pcap_strerror(lw.lw_err));
retv = -1;
goto done;
}
for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0)
retv = -1;
}
done:
save_errno = errno;
for (entry = lw.lw_list; entry != NULL; entry = next) {
next = entry->lnl_next;
free(entry);
}
errno = save_errno;
return (retv);
}
static int
pcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user)
{
int len;
u_char *bufp;
size_t msglen;
int retv;
len = p->cc;
if (len != 0) {
bufp = p->bp;
goto process_pkts;
}
do {
if (p->break_loop) {
p->break_loop = 0;
return (-2);
}
msglen = p->bufsize;
bufp = p->buffer + p->offset;
retv = dlpi_recv(p->dlpi_hd, NULL, NULL, bufp,
&msglen, -1, NULL);
if (retv != DLPI_SUCCESS) {
if (retv == DL_SYSERR && errno == EINTR) {
len = 0;
continue;
}
pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd),
"dlpi_recv", retv, p->errbuf);
return (-1);
}
len = msglen;
} while (len == 0);
process_pkts:
return (pcap_process_pkts(p, callback, user, count, bufp, len));
}
static int
pcap_inject_libdlpi(pcap_t *p, const void *buf, size_t size)
{
int retv;
retv = dlpi_send(p->dlpi_hd, NULL, 0, buf, size, NULL);
if (retv != DLPI_SUCCESS) {
pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), "dlpi_send", retv,
p->errbuf);
return (-1);
}
return (size);
}
static void
pcap_cleanup_libdlpi(pcap_t *p)
{
if (p->dlpi_hd != NULL) {
dlpi_close(p->dlpi_hd);
p->dlpi_hd = NULL;
p->fd = -1;
}
pcap_cleanup_live_common(p);
}
static void
pcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf)
{
snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s",
func, linkname, dlpi_strerror(err));
}
pcap_t *
pcap_create(const char *device, char *ebuf)
{
pcap_t *p;
p = pcap_create_common(device, ebuf);
if (p == NULL)
return (NULL);
p->activate_op = pcap_activate_libdlpi;
return (p);
}