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2022-04-22trafgen: Check pointer in ipv6 device address lookup functionMatPerin1-0/+2
The getifaddrs function returns a linked list node for L2 even in the case of L3 interfaces (e.g. a TUN device), but with the pointer to the address structure set to NULL. This causes a segfault when trying to access the address family from it when such network interfaces are present in the system. The issue is solved by checking the validity of the pointer beforehand: if the address structure is present the address family can be fetched and the current iteration can go on safely, otherwise the node is skipped (as it is not linked to any address). Signed-off-by: Matteo Perin <matteoperin1302@gmail.com>
2017-09-13dev: only calculate wireless bitrate if necessaryTobias Klauser1-5/+4
Only call wireless_bitrate (and thus the underlying ioctl) if strictly necessary, i.e. ethtool_bitrate returned 0. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-05-10all: use <net/*> headers instead of <linux/*> where possibleTobias Klauser1-3/+1
The musl libc headers redefine some of the structs in linux/if_arp.h and linux/if_ether.h, leading to compilation errors. Fix those by using the libc provided versions of these headers and provide compatibility defines for those that aren't present in older glibc versions. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2017-03-02dev: Fix buffer overflow in device_addr2str()Tobias Klauser1-11/+3
If the passed buffer is too small to contain an address of length alen (i.e. during fuzzing), we overflow the buffer due to blen being decremented below 0, which gets wrapped around to a really large value when passed as the size argument to snprintf(). Fix it by incorporating the changes to iproute2 ll_addr_n2a() where the issue was fixed in commit f63ed3e62989 ("lib/ll_addr: improve ll_addr_n2a() a bit"). Fixes #170 Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-09-29all: fix build on CentOS 6 by checking presence of several macrosYousong Zhou1-0/+2
Protect usage of macros not present in pre-3.x kernels. Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2016-01-28dev: Add function to get device hardware addressVadim Kochan1-0/+25
Add device_hw_address() function to get device MAC address. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [tk: Add len parameter and error out on too short buffers] Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-07-20dev: device_set_flags: also dump errorDaniel Borkmann1-1/+1
We currently don't dump the actual error message whereas we should allow the user to identify a problem more easily. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2015-07-01netsniff-ng: dev: Rename device_ifindex_get to __device_ifindexTobias Klauser1-2/+2
Make the function name more in line with the scheme we use for other similar functions: the function prefixed with __ returns a negative error code, the function without prefix panic()'s on error. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-06-20netsniff-ng: Add dissector for Linux "cooked" packetsVadim Kochan1-1/+1
Added dissector_sll.c which uses sockaddr_ll to lookup & print higher L3 layer protocol. This dissector is mapped by LINKTYPE_LINUX_SLL link type. Sample output of dissected Netlink & Ethernet packets. Truncated manually some longer lines by "...": > nlmon0 20 1434193547s.717131169ns #6 [ Linux "cooked" Pkt Type 4 (outgoing), If Type 824 (netlink), Addr Len 0, Src (), Proto 0x0 ] [ NLMSG Family 0 (routing), Len 20, Type 0x0003 (DONE)... > wlp3s0 52 1434194181s.436224709ns #9 [ Linux "cooked" Pkt Type 4 (outgoing), If Type 1 (ether), Addr Len 6, Src (XX:XX:XX:XX:XX:XX), Proto 0x800 ] [ IPv4 Addr (XXX.XXX.XXX.XXX => 212.42.76.253), Proto (6), TTL (64), TOS (0), ... ), CSum (0x1ef5) is ok ] [ Geo (local => Ukraine) ] [ TCP Port (45849 => 443 (https)), SN (0x1744209), AN (0x46ca9611), DataOff (8) ... [ Chr .....w.Rj).. ] [ Hex XX XX XX XX XX XX XX XX XX XX XX XX ] Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2015-06-13dev: Add device string convertions (addr, dev type)Vadim Kochan1-0/+182
Move device string convertions funcs (device_type2str, device_addr2str) from proto_nlmsg.c to dev.c to use them in other modules. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> [ dbkm: minor stylistic fixes ] Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2015-04-21dev: Close socket in error path of device_ifindex_get()Tobias Klauser1-2/+3
If the ioctl() fails, the socket still needs to be closed instead of returning directly. This issue was discovered using the Coverity scanner. Fixes: f43bbe9 ("mac80211: Check existence of generated monX device") Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2015-04-21netsniff-ng: fix snooping on any device when no option is givenDaniel Borkmann1-1/+2
Commit f43bbe9e895a ("mac80211: Check existence of generated monX device") broke starting netsniff-ng w/o any arguments, that is, sniffing on "any" device. The test in device_ifindex() should be index < 0. Fixes: f43bbe9e895a ("mac80211: Check existence of generated monX device") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2015-04-20mac80211: Check existence of generated monX deviceVadim Kochan1-3/+12
Fix then case when netsniff-ng fails if there is already an existing monX device while generating one. Signed-off-by: Vadim Kochan <vadim4j@gmail.com> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-08-09dev: Integrate `promisc' module into `dev' moduleTobias Klauser1-0/+21
Since entering/leaving promiscuous mode also is a device specific function and all users of the `promisc' module also use `dev', integrate it there. Also rename the functions to have a `device_' prefix like the other functions in the module. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-08-08dev: Make device_mtu() return size_tTobias Klauser1-2/+3
We don't return negative values and the MTU is supposed to be the (maximum) length of a packet, thus make it of type size_t. Most of the users in the code store it in size_t already anyway. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-07-31dev: Constify `ifname' parameter to device_up_and_running()Tobias Klauser1-1/+1
The parameter `ifname' to device_up_and_running() is never modified inside the function, thus mark it as const. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
2013-07-03dev: linktype: use ARPHRD_ETHER for "any" deviceDaniel Borkmann1-1/+3
Use ARPHRD_ETHER for the "any" device, so that when typing "netsniff-ng" without any arguments, ethernet is assumed. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-07-03pcap: support for various linktypesDaniel Borkmann1-0/+24
Add a device_type() method to get the assigned dev->type from the kernel, and add support for automatic selection of the correct pcap file header's linktype. This needs to be integrated into the core code though. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-20dev: mark paths likely/unlikelyDaniel Borkmann1-4/+4
Mark them as what is to be most expected. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-17dev: make paths unlikely, simplify codeDaniel Borkmann1-17/+11
Simplify code a bit and mark error paths unlikely. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-17dev: bail out if ifindex could not be retrievedDaniel Borkmann1-4/+4
If we fail to find the ifindex of a given device, bail out. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xutils: eliminate xutils, move rest to epoll2Daniel Borkmann1-1/+0
Finally eliminate xutils.{c,h} and move the rest to epoll2. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04link: add link management functionsDaniel Borkmann1-0/+1
Same here as usual, break out link functions from xutils. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04sock: add socket management functionsDaniel Borkmann1-0/+1
Remove them from xutils, and add them to socket management. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
2013-06-04xutils: move device management functions out of xutilsDaniel Borkmann1-0/+169
Move those functions out so that they can be more easily maintained in its separate file. Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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