diff options
Diffstat (limited to 'lib/libpcap/libpcap/pcap-libdlpi.c')
-rw-r--r-- | lib/libpcap/libpcap/pcap-libdlpi.c | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/lib/libpcap/libpcap/pcap-libdlpi.c b/lib/libpcap/libpcap/pcap-libdlpi.c new file mode 100644 index 0000000..a38da8b --- /dev/null +++ b/lib/libpcap/libpcap/pcap-libdlpi.c @@ -0,0 +1,495 @@ +/* + * 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. + */ + +#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" + +/* 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 *, size_t); +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) pcap_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) + status = PCAP_ERROR_NO_SUCH_DEVICE; + else if (retv == DL_SYSERR && + (errno == EPERM || errno == EACCES)) + status = PCAP_ERROR_PERM_DENIED; + 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; + pcap_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 = 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_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)) + err = PCAP_ERROR_PERM_DENIED; + 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 +pcap_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 (pcap_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 pcap_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) { + pcap_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 (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, size_t 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; + } + pcap_cleanup_live_common(p); +} + +/* + * Write error message to buffer. + */ +static void +pcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf) +{ + pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s", + func, linkname, dlpi_strerror(err)); +} + +pcap_t * +pcap_create_interface(const char *device _U_, char *ebuf) +{ + pcap_t *p; + + p = pcap_create_common(ebuf, sizeof (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); +} |