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-rw-r--r--contrib/libpcap/pcap-libdlpi.c515
1 files changed, 515 insertions, 0 deletions
diff --git a/contrib/libpcap/pcap-libdlpi.c b/contrib/libpcap/pcap-libdlpi.c
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index 000000000000..b5ee339fa91c
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+++ b/contrib/libpcap/pcap-libdlpi.c
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+/*
+ * 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.
+ *
+ * This code contributed by Sagun Shakya (sagun.shakya@sun.com)
+ */
+/*
+ * Packet capture routines for DLPI using libdlpi under SunOS 5.11.
+ */
+
+#include <config.h>
+
+#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"
+
+/* Forwards. */
+static int dlpromiscon(pcap_t *, bpf_u_int32);
+static int pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *);
+static int pcap_inject_libdlpi(pcap_t *, const void *, int);
+static void pcap_libdlpi_err(const char *, const char *, int, char *);
+static void pcap_cleanup_libdlpi(pcap_t *);
+
+/*
+ * list_interfaces() will list all the network links that are
+ * available on a system.
+ */
+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;
+
+/*
+ * The caller of this function should free the memory allocated
+ * for each linknamelist_t "entry" allocated.
+ */
+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) pcapint_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)
+{
+ struct pcap_dlpi *pd = p->priv;
+ int status = 0;
+ int retv;
+ dlpi_handle_t dh;
+ dlpi_info_t dlinfo;
+
+ /*
+ * Enable Solaris raw and passive DLPI extensions;
+ * dlpi_open() will not fail if the underlying link does not support
+ * passive mode. See dlpi(7P) for details.
+ */
+ retv = dlpi_open(p->opt.device, &dh, DLPI_RAW|DLPI_PASSIVE);
+ if (retv != DLPI_SUCCESS) {
+ if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK) {
+ /*
+ * There's nothing more to say, so clear the
+ * error message.
+ */
+ status = PCAP_ERROR_NO_SUCH_DEVICE;
+ p->errbuf[0] = '\0';
+ } else if (retv == DL_SYSERR &&
+ (errno == EPERM || errno == EACCES)) {
+ status = PCAP_ERROR_PERM_DENIED;
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Attempt to open DLPI device failed with %s - root privilege may be required",
+ (errno == EPERM) ? "EPERM" : "EACCES");
+ } else {
+ status = PCAP_ERROR;
+ pcap_libdlpi_err(p->opt.device, "dlpi_open", retv,
+ p->errbuf);
+ }
+ return (status);
+ }
+ pd->dlpi_hd = dh;
+
+ if (p->opt.rfmon) {
+ /*
+ * This device exists, but we don't support monitor mode
+ * any platforms that support DLPI.
+ */
+ status = PCAP_ERROR_RFMON_NOTSUP;
+ goto bad;
+ }
+
+ /* Bind with DLPI_ANY_SAP. */
+ if ((retv = dlpi_bind(pd->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
+ status = PCAP_ERROR;
+ pcap_libdlpi_err(p->opt.device, "dlpi_bind", retv, p->errbuf);
+ goto bad;
+ }
+
+ /*
+ * Turn a negative snapshot value (invalid), a snapshot value of
+ * 0 (unspecified), or a value bigger than the normal maximum
+ * value, into the maximum allowed value.
+ *
+ * If some application really *needs* a bigger snapshot
+ * length, we should just increase MAXIMUM_SNAPLEN.
+ */
+ if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
+ p->snapshot = MAXIMUM_SNAPLEN;
+
+ /* Enable promiscuous mode. */
+ if (p->opt.promisc) {
+ retv = dlpromiscon(p, DL_PROMISC_PHYS);
+ if (retv < 0) {
+ /*
+ * "You don't have permission to capture on
+ * this device" and "you don't have permission
+ * to capture in promiscuous mode on this
+ * device" are different; let the user know,
+ * so if they can't get permission to
+ * capture in promiscuous mode, they can at
+ * least try to capture in non-promiscuous
+ * mode.
+ *
+ * XXX - you might have to capture in
+ * promiscuous mode to see outgoing packets.
+ */
+ if (retv == PCAP_ERROR_PERM_DENIED)
+ status = PCAP_ERROR_PROMISC_PERM_DENIED;
+ else
+ status = retv;
+ goto bad;
+ }
+ } else {
+ /* Try to enable multicast. */
+ retv = dlpromiscon(p, DL_PROMISC_MULTI);
+ if (retv < 0) {
+ status = retv;
+ goto bad;
+ }
+ }
+
+ /* Try to enable SAP promiscuity. */
+ retv = dlpromiscon(p, DL_PROMISC_SAP);
+ if (retv < 0) {
+ /*
+ * Not fatal, since the DL_PROMISC_PHYS mode worked.
+ * Report it as a warning, however.
+ */
+ if (p->opt.promisc)
+ status = PCAP_WARNING;
+ else {
+ status = retv;
+ goto bad;
+ }
+ }
+
+ /* Determine link type. */
+ if ((retv = dlpi_info(pd->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
+ status = PCAP_ERROR;
+ pcap_libdlpi_err(p->opt.device, "dlpi_info", retv, p->errbuf);
+ goto bad;
+ }
+
+ if (pcap_process_mactype(p, dlinfo.di_mactype) != 0) {
+ status = PCAP_ERROR;
+ goto bad;
+ }
+
+ p->fd = dlpi_fd(pd->dlpi_hd);
+
+ /* Push and configure bufmod. */
+ if (pcap_conf_bufmod(p, p->snapshot) != 0) {
+ status = PCAP_ERROR;
+ goto bad;
+ }
+
+ /*
+ * Flush the read side.
+ */
+ if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
+ status = PCAP_ERROR;
+ pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "FLUSHR");
+ goto bad;
+ }
+
+ /* Allocate data buffer. */
+ if (pcap_alloc_databuf(p) != 0) {
+ status = PCAP_ERROR;
+ goto bad;
+ }
+
+ /*
+ * "p->fd" is a FD for a STREAMS device, so "select()" and
+ * "poll()" should work on it.
+ */
+ p->selectable_fd = p->fd;
+
+ p->read_op = pcap_read_libdlpi;
+ p->inject_op = pcap_inject_libdlpi;
+ p->setfilter_op = pcapint_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 = pcapint_getnonblock_fd;
+ p->setnonblock_op = pcapint_setnonblock_fd;
+ p->stats_op = pcap_stats_dlpi;
+ p->cleanup_op = pcap_cleanup_libdlpi;
+
+ return (status);
+bad:
+ pcap_cleanup_libdlpi(p);
+ return (status);
+}
+
+#define STRINGIFY(n) #n
+
+static int
+dlpromiscon(pcap_t *p, bpf_u_int32 level)
+{
+ struct pcap_dlpi *pd = p->priv;
+ int retv;
+ int err;
+
+ retv = dlpi_promiscon(pd->dlpi_hd, level);
+ if (retv != DLPI_SUCCESS) {
+ if (retv == DL_SYSERR &&
+ (errno == EPERM || errno == EACCES)) {
+ if (level == DL_PROMISC_PHYS) {
+ err = PCAP_ERROR_PROMISC_PERM_DENIED;
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Attempt to set promiscuous mode failed with %s - root privilege may be required",
+ (errno == EPERM) ? "EPERM" : "EACCES");
+ } else {
+ err = PCAP_ERROR_PERM_DENIED;
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Attempt to set %s mode failed with %s - root privilege may be required",
+ (level == DL_PROMISC_MULTI) ? "multicast" : "SAP promiscuous",
+ (errno == EPERM) ? "EPERM" : "EACCES");
+ }
+ } else {
+ err = PCAP_ERROR;
+ pcap_libdlpi_err(p->opt.device,
+ "dlpi_promiscon" STRINGIFY(level),
+ retv, p->errbuf);
+ }
+ return (err);
+ }
+ return (0);
+}
+
+/*
+ * Presumably everything returned by dlpi_walk() is a DLPI device,
+ * so there's no work to be done here to check whether name refers
+ * to a DLPI device.
+ */
+static int
+is_dlpi_interface(const char *name _U_)
+{
+ return (1);
+}
+
+static int
+get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
+{
+ /*
+ * Nothing we can do other than mark loopback devices as "the
+ * connected/disconnected status doesn't apply".
+ *
+ * XXX - on Solaris, can we do what the dladm command does,
+ * i.e. get a connected/disconnected indication from a kstat?
+ * (Note that you can also get the link speed, and possibly
+ * other information, from a kstat as well.)
+ */
+ if (*flags & PCAP_IF_LOOPBACK) {
+ /*
+ * Loopback devices aren't wireless, and "connected"/
+ * "disconnected" doesn't apply to them.
+ */
+ *flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
+ return (0);
+ }
+ return (0);
+}
+
+/*
+ * In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
+ * network links that are plumbed and are up. dlpi_walk(3DLPI) will find
+ * additional network links present in the system.
+ */
+int
+pcapint_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
+{
+ int retv = 0;
+
+ linknamelist_t *entry, *next;
+ linkwalk_t lw = {NULL, 0};
+ int save_errno;
+
+ /*
+ * Get the list of regular interfaces first.
+ */
+ if (pcapint_findalldevs_interfaces(devlistp, errbuf,
+ is_dlpi_interface, get_if_flags) == -1)
+ return (-1); /* failure */
+
+ /* dlpi_walk() for loopback will be added here. */
+
+ /*
+ * Find all DLPI devices in the current zone.
+ *
+ * XXX - will pcapint_findalldevs_interfaces() find any devices
+ * outside the current zone? If not, the only reason to call
+ * it would be to get the interface addresses.
+ */
+ dlpi_walk(list_interfaces, &lw, 0);
+
+ if (lw.lw_err != 0) {
+ pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ lw.lw_err, "dlpi_walk");
+ retv = -1;
+ goto done;
+ }
+
+ /* Add linkname if it does not exist on the list. */
+ for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
+ /*
+ * If it isn't already in the list of devices, try to
+ * add it.
+ */
+ if (pcapint_find_or_add_dev(devlistp, entry->linkname, 0, get_if_flags,
+ NULL, errbuf) == NULL)
+ 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);
+}
+
+/*
+ * Read data received on DLPI handle. Returns -2 if told to terminate, else
+ * returns the number of packets read.
+ */
+static int
+pcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user)
+{
+ struct pcap_dlpi *pd = p->priv;
+ int len;
+ u_char *bufp;
+ size_t msglen;
+ int retv;
+
+ len = p->cc;
+ if (len != 0) {
+ bufp = p->bp;
+ goto process_pkts;
+ }
+ do {
+ /* Has "pcap_breakloop()" been called? */
+ if (p->break_loop) {
+ /*
+ * Yes - clear the flag that indicates that it has,
+ * and return -2 to indicate that we were told to
+ * break out of the loop.
+ */
+ p->break_loop = 0;
+ return (-2);
+ }
+
+ msglen = p->bufsize;
+ bufp = (u_char *)p->buffer + p->offset;
+
+ retv = dlpi_recv(pd->dlpi_hd, NULL, NULL, bufp,
+ &msglen, -1, NULL);
+ if (retv != DLPI_SUCCESS) {
+ /*
+ * This is most likely a call to terminate out of the
+ * loop. So, do not return an error message, instead
+ * check if "pcap_breakloop()" has been called above.
+ */
+ if (retv == DL_SYSERR && errno == EINTR) {
+ len = 0;
+ continue;
+ }
+ pcap_libdlpi_err(dlpi_linkname(pd->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, int size)
+{
+ struct pcap_dlpi *pd = p->priv;
+ int retv;
+
+ retv = dlpi_send(pd->dlpi_hd, NULL, 0, buf, size, NULL);
+ if (retv != DLPI_SUCCESS) {
+ pcap_libdlpi_err(dlpi_linkname(pd->dlpi_hd), "dlpi_send", retv,
+ p->errbuf);
+ return (-1);
+ }
+ /*
+ * dlpi_send(3DLPI) does not provide a way to return the number of
+ * bytes sent on the wire. Based on the fact that DLPI_SUCCESS was
+ * returned we are assuming 'size' bytes were sent.
+ */
+ return (size);
+}
+
+/*
+ * Close dlpi handle.
+ */
+static void
+pcap_cleanup_libdlpi(pcap_t *p)
+{
+ struct pcap_dlpi *pd = p->priv;
+
+ if (pd->dlpi_hd != NULL) {
+ dlpi_close(pd->dlpi_hd);
+ pd->dlpi_hd = NULL;
+ p->fd = -1;
+ }
+ pcapint_cleanup_live_common(p);
+}
+
+/*
+ * Write error message to buffer.
+ */
+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 *
+pcapint_create_interface(const char *device _U_, char *ebuf)
+{
+ pcap_t *p;
+
+ p = PCAP_CREATE_COMMON(ebuf, struct pcap_dlpi);
+ if (p == NULL)
+ return (NULL);
+
+ p->activate_op = pcap_activate_libdlpi;
+ return (p);
+}
+
+/*
+ * Libpcap version string.
+ */
+const char *
+pcap_lib_version(void)
+{
+ return (PCAP_VERSION_STRING);
+}
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