diff options
Diffstat (limited to 'freebsd/contrib/libpcap/fad-helpers.c')
| -rw-r--r-- | freebsd/contrib/libpcap/fad-helpers.c | 890 |
1 files changed, 0 insertions, 890 deletions
diff --git a/freebsd/contrib/libpcap/fad-helpers.c b/freebsd/contrib/libpcap/fad-helpers.c deleted file mode 100644 index 0b98b484..00000000 --- a/freebsd/contrib/libpcap/fad-helpers.c +++ /dev/null @@ -1,890 +0,0 @@ -#include <machine/rtems-bsd-user-space.h> - -/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */ -/* - * Copyright (c) 1994, 1995, 1996, 1997, 1998 - * 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 the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the Computer Systems - * Engineering Group at Lawrence Berkeley Laboratory. - * 4. Neither the name of the University nor of the Laboratory may be used - * to endorse or promote products derived from this software without - * specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#ifdef _WIN32 -#include <pcap-stdinc.h> -#else /* _WIN32 */ - -#include <sys/param.h> -#ifndef MSDOS -#include <sys/file.h> -#endif -#include <sys/ioctl.h> -#include <sys/socket.h> -#ifdef HAVE_SYS_SOCKIO_H -#include <sys/sockio.h> -#endif - -struct mbuf; /* Squelch compiler warnings on some platforms for */ -struct rtentry; /* declarations in <net/if.h> */ -#include <net/if.h> -#include <netinet/in.h> -#endif /* _WIN32 */ - -#include <ctype.h> -#include <errno.h> -#include <memory.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#if !defined(_WIN32) && !defined(__BORLANDC__) -#include <unistd.h> -#endif /* !_WIN32 && !__BORLANDC__ */ -#ifdef HAVE_LIMITS_H -#include <limits.h> -#else -#define INT_MAX 2147483647 -#endif - -#include "pcap-int.h" - -#ifdef HAVE_OS_PROTO_H -#include "os-proto.h" -#endif - -#ifndef _WIN32 -/* Not all systems have IFF_LOOPBACK */ -#ifdef IFF_LOOPBACK -#define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK) -#else -#define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \ - (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0')) -#endif - -#ifdef IFF_UP -#define ISUP(flags) ((flags) & IFF_UP) -#else -#define ISUP(flags) 0 -#endif - -#ifdef IFF_RUNNING -#define ISRUNNING(flags) ((flags) & IFF_RUNNING) -#else -#define ISRUNNING(flags) 0 -#endif - -/* - * Map UN*X-style interface flags to libpcap flags. - */ -bpf_u_int32 -if_flags_to_pcap_flags(const char *name _U_, u_int if_flags) -{ - bpf_u_int32 pcap_flags; - - pcap_flags = 0; - if (ISLOOPBACK(name, if_flags)) - pcap_flags |= PCAP_IF_LOOPBACK; - if (ISUP(if_flags)) - pcap_flags |= PCAP_IF_UP; - if (ISRUNNING(if_flags)) - pcap_flags |= PCAP_IF_RUNNING; - return (pcap_flags); -} -#endif - -static struct sockaddr * -dup_sockaddr(struct sockaddr *sa, size_t sa_length) -{ - struct sockaddr *newsa; - - if ((newsa = malloc(sa_length)) == NULL) - return (NULL); - return (memcpy(newsa, sa, sa_length)); -} - -/* - * Construct a "figure of merit" for an interface, for use when sorting - * the list of interfaces, in which interfaces that are up are superior - * to interfaces that aren't up, interfaces that are up and running are - * superior to interfaces that are up but not running, and non-loopback - * interfaces that are up and running are superior to loopback interfaces, - * and interfaces with the same flags have a figure of merit that's higher - * the lower the instance number. - * - * The goal is to try to put the interfaces most likely to be useful for - * capture at the beginning of the list. - * - * The figure of merit, which is lower the "better" the interface is, - * has the uppermost bit set if the interface isn't running, the bit - * below that set if the interface isn't up, the bit below that set - * if the interface is a loopback interface, and the interface index - * in the 29 bits below that. (Yes, we assume u_int is 32 bits.) - */ -static u_int -get_figure_of_merit(pcap_if_t *dev) -{ - const char *cp; - u_int n; - - if (strcmp(dev->name, "any") == 0) { - /* - * Give the "any" device an artificially high instance - * number, so it shows up after all other non-loopback - * interfaces. - */ - n = 0x1FFFFFFF; /* 29 all-1 bits */ - } else { - /* - * A number at the end of the device name string is - * assumed to be a unit number. - */ - cp = dev->name + strlen(dev->name) - 1; - while (cp-1 >= dev->name && *(cp-1) >= '0' && *(cp-1) <= '9') - cp--; - if (*cp >= '0' && *cp <= '9') - n = atoi(cp); - else - n = 0; - } - if (!(dev->flags & PCAP_IF_RUNNING)) - n |= 0x80000000; - if (!(dev->flags & PCAP_IF_UP)) - n |= 0x40000000; - if (dev->flags & PCAP_IF_LOOPBACK) - n |= 0x20000000; - return (n); -} - -/* - * Try to get a description for a given device. - * Returns a mallocated description if it could and NULL if it couldn't. - * - * XXX - on FreeBSDs that support it, should it get the sysctl named - * "dev.{adapter family name}.{adapter unit}.%desc" to get a description - * of the adapter? Note that "dev.an.0.%desc" is "Aironet PC4500/PC4800" - * with my Cisco 350 card, so the name isn't entirely descriptive. The - * "dev.an.0.%pnpinfo" has a better description, although one might argue - * that the problem is really a driver bug - if it can find out that it's - * a Cisco 340 or 350, rather than an old Aironet card, it should use - * that in the description. - * - * Do NetBSD, DragonflyBSD, or OpenBSD support this as well? FreeBSD - * and OpenBSD let you get a description, but it's not generated by the OS, - * it's set with another ioctl that ifconfig supports; we use that to get - * a description in FreeBSD and OpenBSD, but if there is no such - * description available, it still might be nice to get some description - * string based on the device type or something such as that. - * - * In OS X, the System Configuration framework can apparently return - * names in 10.4 and later. - * - * It also appears that freedesktop.org's HAL offers an "info.product" - * string, but the HAL specification says it "should not be used in any - * UI" and "subsystem/capability specific properties" should be used - * instead and, in any case, I think HAL is being deprecated in - * favor of other stuff such as DeviceKit. DeviceKit doesn't appear - * to have any obvious product information for devices, but maybe - * I haven't looked hard enough. - * - * Using the System Configuration framework, or HAL, or DeviceKit, or - * whatever, would require that libpcap applications be linked with - * the frameworks/libraries in question. That shouldn't be a problem - * for programs linking with the shared version of libpcap (unless - * you're running on AIX - which I think is the only UN*X that doesn't - * support linking a shared library with other libraries on which it - * depends, and having an executable linked only with the first shared - * library automatically pick up the other libraries when started - - * and using HAL or whatever). Programs linked with the static - * version of libpcap would have to use pcap-config with the --static - * flag in order to get the right linker flags in order to pick up - * the additional libraries/frameworks; those programs need that anyway - * for libpcap 1.1 and beyond on Linux, as, by default, it requires - * -lnl. - * - * Do any other UN*Xes, or desktop environments support getting a - * description? - */ -static char * -get_if_description(const char *name) -{ -#ifdef SIOCGIFDESCR - char *description = NULL; - int s; - struct ifreq ifrdesc; -#ifndef IFDESCRSIZE - size_t descrlen = 64; -#else - size_t descrlen = IFDESCRSIZE; -#endif /* IFDESCRSIZE */ - - /* - * Get the description for the interface. - */ - memset(&ifrdesc, 0, sizeof ifrdesc); - strlcpy(ifrdesc.ifr_name, name, sizeof ifrdesc.ifr_name); - s = socket(AF_INET, SOCK_DGRAM, 0); - if (s >= 0) { -#ifdef __FreeBSD__ - /* - * On FreeBSD, if the buffer isn't big enough for the - * description, the ioctl succeeds, but the description - * isn't copied, ifr_buffer.length is set to the description - * length, and ifr_buffer.buffer is set to NULL. - */ - for (;;) { - free(description); - if ((description = malloc(descrlen)) != NULL) { - ifrdesc.ifr_buffer.buffer = description; - ifrdesc.ifr_buffer.length = descrlen; - if (ioctl(s, SIOCGIFDESCR, &ifrdesc) == 0) { - if (ifrdesc.ifr_buffer.buffer == - description) - break; - else - descrlen = ifrdesc.ifr_buffer.length; - } else { - /* - * Failed to get interface description. - */ - free(description); - description = NULL; - break; - } - } else - break; - } -#else /* __FreeBSD__ */ - /* - * The only other OS that currently supports - * SIOCGIFDESCR is OpenBSD, and it has no way - * to get the description length - it's clamped - * to a maximum of IFDESCRSIZE. - */ - if ((description = malloc(descrlen)) != NULL) { - ifrdesc.ifr_data = (caddr_t)description; - if (ioctl(s, SIOCGIFDESCR, &ifrdesc) != 0) { - /* - * Failed to get interface description. - */ - free(description); - description = NULL; - } - } -#endif /* __FreeBSD__ */ - close(s); - if (description != NULL && strlen(description) == 0) { - /* - * Description is empty, so discard it. - */ - free(description); - description = NULL; - } - } - -#ifdef __FreeBSD__ - /* - * For FreeBSD, if we didn't get a description, and this is - * a device with a name of the form usbusN, label it as a USB - * bus. - */ - if (description == NULL) { - if (strncmp(name, "usbus", 5) == 0) { - /* - * OK, it begins with "usbus". - */ - long busnum; - char *p; - - errno = 0; - busnum = strtol(name + 5, &p, 10); - if (errno == 0 && p != name + 5 && *p == '\0' && - busnum >= 0 && busnum <= INT_MAX) { - /* - * OK, it's a valid number that's not - * bigger than INT_MAX. Construct - * a description from it. - */ - static const char descr_prefix[] = "USB bus number "; - size_t descr_size; - - /* - * Allow enough room for a 32-bit bus number. - * sizeof (descr_prefix) includes the - * terminating NUL. - */ - descr_size = sizeof (descr_prefix) + 10; - description = malloc(descr_size); - if (description != NULL) { - pcap_snprintf(description, descr_size, - "%s%ld", descr_prefix, busnum); - } - } - } - } -#endif - return (description); -#else /* SIOCGIFDESCR */ - return (NULL); -#endif /* SIOCGIFDESCR */ -} - -/* - * Look for a given device in the specified list of devices. - * - * If we find it, return 0 and set *curdev_ret to point to it. - * - * If we don't find it, check whether we can open it: - * - * If that fails with PCAP_ERROR_NO_SUCH_DEVICE or - * PCAP_ERROR_IFACE_NOT_UP, don't attempt to add an entry for - * it, as that probably means it exists but doesn't support - * packet capture. - * - * Otherwise, attempt to add an entry for it, with the specified - * ifnet flags and description, and, if that succeeds, return 0 - * and set *curdev_ret to point to the new entry, otherwise - * return PCAP_ERROR and set errbuf to an error message. If we - * weren't given a description, try to get one. - */ -int -add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name, - bpf_u_int32 flags, const char *description, char *errbuf) -{ - pcap_t *p; - pcap_if_t *curdev, *prevdev, *nextdev; - u_int this_figure_of_merit, nextdev_figure_of_merit; - char open_errbuf[PCAP_ERRBUF_SIZE]; - int ret; - - /* - * Is there already an entry in the list for this interface? - */ - for (curdev = *alldevs; curdev != NULL; curdev = curdev->next) { - if (strcmp(name, curdev->name) == 0) - break; /* yes, we found it */ - } - - if (curdev == NULL) { - /* - * No, we didn't find it. - * - * Can we open this interface for live capture? - * - * We do this check so that interfaces that are - * supplied by the interface enumeration mechanism - * we're using but that don't support packet capture - * aren't included in the list. Loopback interfaces - * on Solaris are an example of this; we don't just - * omit loopback interfaces on all platforms because - * you *can* capture on loopback interfaces on some - * OSes. - * - * On OS X, we don't do this check if the device - * name begins with "wlt"; at least some versions - * of OS X offer monitor mode capturing by having - * a separate "monitor mode" device for each wireless - * adapter, rather than by implementing the ioctls - * that {Free,Net,Open,DragonFly}BSD provide. - * Opening that device puts the adapter into monitor - * mode, which, at least for some adapters, causes - * them to deassociate from the network with which - * they're associated. - * - * Instead, we try to open the corresponding "en" - * device (so that we don't end up with, for users - * without sufficient privilege to open capture - * devices, a list of adapters that only includes - * the wlt devices). - */ -#ifdef __APPLE__ - if (strncmp(name, "wlt", 3) == 0) { - char *en_name; - size_t en_name_len; - - /* - * Try to allocate a buffer for the "en" - * device's name. - */ - en_name_len = strlen(name) - 1; - en_name = malloc(en_name_len + 1); - if (en_name == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - return (-1); - } - strcpy(en_name, "en"); - strcat(en_name, name + 3); - p = pcap_create(en_name, open_errbuf); - free(en_name); - } else -#endif /* __APPLE */ - p = pcap_create(name, open_errbuf); - if (p == NULL) { - /* - * The attempt to create the pcap_t failed; - * that's probably an indication that we're - * out of memory. - * - * Don't bother including this interface, - * but don't treat it as an error. - */ - *curdev_ret = NULL; - return (0); - } - /* Small snaplen, so we don't try to allocate much memory. */ - pcap_set_snaplen(p, 68); - ret = pcap_activate(p); - pcap_close(p); - switch (ret) { - - case PCAP_ERROR_NO_SUCH_DEVICE: - case PCAP_ERROR_IFACE_NOT_UP: - /* - * We expect these two errors - they're the - * reason we try to open the device. - * - * PCAP_ERROR_NO_SUCH_DEVICE typically means - * "there's no such device *known to the - * OS's capture mechanism*", so, even though - * it might be a valid network interface, you - * can't capture on it (e.g., the loopback - * device in Solaris up to Solaris 10, or - * the vmnet devices in OS X with VMware - * Fusion). We don't include those devices - * in our list of devices, as there's no - * point in doing so - they're not available - * for capture. - * - * PCAP_ERROR_IFACE_NOT_UP means that the - * OS's capture mechanism doesn't work on - * interfaces not marked as up; some capture - * mechanisms *do* support that, so we no - * longer reject those interfaces out of hand, - * but we *do* want to reject them if they - * can't be opened for capture. - */ - *curdev_ret = NULL; - return (0); - } - - /* - * Yes, we can open it, or we can't, for some other - * reason. - * - * If we can open it, we want to offer it for - * capture, as you can capture on it. If we can't, - * we want to offer it for capture, so that, if - * the user tries to capture on it, they'll get - * an error and they'll know why they can't - * capture on it (e.g., insufficient permissions) - * or they'll report it as a problem (and then - * have the error message to provide as information). - * - * Allocate a new entry. - */ - curdev = malloc(sizeof(pcap_if_t)); - if (curdev == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - return (-1); - } - - /* - * Fill in the entry. - */ - curdev->next = NULL; - curdev->name = strdup(name); - if (curdev->name == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - free(curdev); - return (-1); - } - if (description == NULL) { - /* - * We weren't handed a description for the - * interface, so see if we can generate one - * ourselves. - */ - curdev->description = get_if_description(name); - } else { - /* - * We were handed a description; make a copy. - */ - curdev->description = strdup(description); - if (curdev->description == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - free(curdev->name); - free(curdev); - return (-1); - } - } - curdev->addresses = NULL; /* list starts out as empty */ - curdev->flags = flags; - - /* - * Add it to the list, in the appropriate location. - * First, get the "figure of merit" for this - * interface. - */ - this_figure_of_merit = get_figure_of_merit(curdev); - - /* - * Now look for the last interface with an figure of merit - * less than or equal to the new interface's figure of - * merit. - * - * We start with "prevdev" being NULL, meaning we're before - * the first element in the list. - */ - prevdev = NULL; - for (;;) { - /* - * Get the interface after this one. - */ - if (prevdev == NULL) { - /* - * The next element is the first element. - */ - nextdev = *alldevs; - } else - nextdev = prevdev->next; - - /* - * Are we at the end of the list? - */ - if (nextdev == NULL) { - /* - * Yes - we have to put the new entry - * after "prevdev". - */ - break; - } - - /* - * Is the new interface's figure of merit less - * than the next interface's figure of merit, - * meaning that the new interface is better - * than the next interface? - */ - nextdev_figure_of_merit = get_figure_of_merit(nextdev); - if (this_figure_of_merit < nextdev_figure_of_merit) { - /* - * Yes - we should put the new entry - * before "nextdev", i.e. after "prevdev". - */ - break; - } - - prevdev = nextdev; - } - - /* - * Insert before "nextdev". - */ - curdev->next = nextdev; - - /* - * Insert after "prevdev" - unless "prevdev" is null, - * in which case this is the first interface. - */ - if (prevdev == NULL) { - /* - * This is the first interface. Pass back a - * pointer to it, and put "curdev" before - * "nextdev". - */ - *alldevs = curdev; - } else - prevdev->next = curdev; - } - - *curdev_ret = curdev; - return (0); -} - -/* - * Try to get a description for a given device, and then look for that - * device in the specified list of devices. - * - * If we find it, then, if the specified address isn't null, add it to - * the list of addresses for the device and return 0. - * - * If we don't find it, check whether we can open it: - * - * If that fails with PCAP_ERROR_NO_SUCH_DEVICE or - * PCAP_ERROR_IFACE_NOT_UP, don't attempt to add an entry for - * it, as that probably means it exists but doesn't support - * packet capture. - * - * Otherwise, attempt to add an entry for it, with the specified - * ifnet flags, and, if that succeeds, add the specified address - * to its list of addresses if that address is non-null, set - * *curdev_ret to point to the new entry, and return 0, otherwise - * return PCAP_ERROR and set errbuf to an error message. - * - * (We can get called with a null address because we might get a list - * of interface name/address combinations from the underlying OS, with - * the address being absent in some cases, rather than a list of - * interfaces with each interface having a list of addresses, so this - * call may be the only call made to add to the list, and we want to - * add interfaces even if they have no addresses.) - */ -int -add_addr_to_iflist(pcap_if_t **alldevs, const char *name, bpf_u_int32 flags, - struct sockaddr *addr, size_t addr_size, - struct sockaddr *netmask, size_t netmask_size, - struct sockaddr *broadaddr, size_t broadaddr_size, - struct sockaddr *dstaddr, size_t dstaddr_size, - char *errbuf) -{ - pcap_if_t *curdev; - - if (add_or_find_if(&curdev, alldevs, name, flags, NULL, errbuf) == -1) { - /* - * Error - give up. - */ - return (-1); - } - if (curdev == NULL) { - /* - * Device wasn't added because it can't be opened. - * Not a fatal error. - */ - return (0); - } - - if (addr == NULL) { - /* - * There's no address to add; this entry just meant - * "here's a new interface". - */ - return (0); - } - - /* - * "curdev" is an entry for this interface, and we have an - * address for it; add an entry for that address to the - * interface's list of addresses. - * - * Allocate the new entry and fill it in. - */ - return (add_addr_to_dev(curdev, addr, addr_size, netmask, - netmask_size, broadaddr, broadaddr_size, dstaddr, - dstaddr_size, errbuf)); -} - -/* - * Add an entry to the list of addresses for an interface. - * "curdev" is the entry for that interface. - * If this is the first IP address added to the interface, move it - * in the list as appropriate. - */ -int -add_addr_to_dev(pcap_if_t *curdev, - struct sockaddr *addr, size_t addr_size, - struct sockaddr *netmask, size_t netmask_size, - struct sockaddr *broadaddr, size_t broadaddr_size, - struct sockaddr *dstaddr, size_t dstaddr_size, - char *errbuf) -{ - pcap_addr_t *curaddr, *prevaddr, *nextaddr; - - curaddr = malloc(sizeof(pcap_addr_t)); - if (curaddr == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - return (-1); - } - - curaddr->next = NULL; - if (addr != NULL) { - curaddr->addr = dup_sockaddr(addr, addr_size); - if (curaddr->addr == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - free(curaddr); - return (-1); - } - } else - curaddr->addr = NULL; - - if (netmask != NULL) { - curaddr->netmask = dup_sockaddr(netmask, netmask_size); - if (curaddr->netmask == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - if (curaddr->addr != NULL) - free(curaddr->addr); - free(curaddr); - return (-1); - } - } else - curaddr->netmask = NULL; - - if (broadaddr != NULL) { - curaddr->broadaddr = dup_sockaddr(broadaddr, broadaddr_size); - if (curaddr->broadaddr == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - if (curaddr->netmask != NULL) - free(curaddr->netmask); - if (curaddr->addr != NULL) - free(curaddr->addr); - free(curaddr); - return (-1); - } - } else - curaddr->broadaddr = NULL; - - if (dstaddr != NULL) { - curaddr->dstaddr = dup_sockaddr(dstaddr, dstaddr_size); - if (curaddr->dstaddr == NULL) { - (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, - "malloc: %s", pcap_strerror(errno)); - if (curaddr->broadaddr != NULL) - free(curaddr->broadaddr); - if (curaddr->netmask != NULL) - free(curaddr->netmask); - if (curaddr->addr != NULL) - free(curaddr->addr); - free(curaddr); - return (-1); - } - } else - curaddr->dstaddr = NULL; - - /* - * Find the end of the list of addresses. - */ - for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) { - nextaddr = prevaddr->next; - if (nextaddr == NULL) { - /* - * This is the end of the list. - */ - break; - } - } - - if (prevaddr == NULL) { - /* - * The list was empty; this is the first member. - */ - curdev->addresses = curaddr; - } else { - /* - * "prevaddr" is the last member of the list; append - * this member to it. - */ - prevaddr->next = curaddr; - } - - return (0); -} - -/* - * Look for a given device in the specified list of devices. - * - * If we find it, return 0. - * - * If we don't find it, check whether we can open it: - * - * If that fails with PCAP_ERROR_NO_SUCH_DEVICE or - * PCAP_ERROR_IFACE_NOT_UP, don't attempt to add an entry for - * it, as that probably means it exists but doesn't support - * packet capture. - * - * Otherwise, attempt to add an entry for it, with the specified - * ifnet flags and description, and, if that succeeds, return 0 - * and set *curdev_ret to point to the new entry, otherwise - * return PCAP_ERROR and set errbuf to an error message. - */ -int -#ifndef __rtems__ -pcap_add_if(pcap_if_t **devlist, const char *name, u_int flags, -#else /* __rtems__ */ -pcap_add_if(pcap_if_t **devlist, const char *name, bpf_u_int32 flags, -#endif /* __rtems__ */ - const char *description, char *errbuf) -{ - pcap_if_t *curdev; - - return (add_or_find_if(&curdev, devlist, name, flags, description, - errbuf)); -} - - -/* - * Free a list of interfaces. - */ -void -pcap_freealldevs(pcap_if_t *alldevs) -{ - pcap_if_t *curdev, *nextdev; - pcap_addr_t *curaddr, *nextaddr; - - for (curdev = alldevs; curdev != NULL; curdev = nextdev) { - nextdev = curdev->next; - - /* - * Free all addresses. - */ - for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) { - nextaddr = curaddr->next; - if (curaddr->addr) - free(curaddr->addr); - if (curaddr->netmask) - free(curaddr->netmask); - if (curaddr->broadaddr) - free(curaddr->broadaddr); - if (curaddr->dstaddr) - free(curaddr->dstaddr); - free(curaddr); - } - - /* - * Free the name string. - */ - free(curdev->name); - - /* - * Free the description string, if any. - */ - if (curdev->description != NULL) - free(curdev->description); - - /* - * Free the interface. - */ - free(curdev); - } -} |