net/Kconfig

   1 #
   2 # Network configuration
   3 #
   4
   5 menuconfig NET
   6         bool "Networking support"
   7         select NLATTR
   8         ---help---
   9           Unless you really know what you are doing, you should say Y here.
  10           The reason is that some programs need kernel networking support even
  11           when running on a stand-alone machine that isn't connected to any
  12           other computer.
  13
  14           If you are upgrading from an older kernel, you
  15           should consider updating your networking tools too because changes
  16           in the kernel and the tools often go hand in hand. The tools are
  17           contained in the package net-tools, the location and version number
  18           of which are given in <file:Documentation/Changes>.
  19
  20           For a general introduction to Linux networking, it is highly
  21           recommended to read the NET-HOWTO, available from
  22           <http://www.tldp.org/docs.html#howto>.
  23
  24 if NET
  25
  26 config WANT_COMPAT_NETLINK_MESSAGES
  27         bool
  28         help
  29           This option can be selected by other options that need compat
  30           netlink messages.
  31
  32 config COMPAT_NETLINK_MESSAGES
  33         def_bool y
  34         depends on COMPAT
  35         depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
  36         help
  37           This option makes it possible to send different netlink messages
  38           to tasks depending on whether the task is a compat task or not. To
  39           achieve this, you need to set skb_shinfo(skb)->frag_list to the
  40           compat skb before sending the skb, the netlink code will sort out
  41           which message to actually pass to the task.
  42
  43           Newly written code should NEVER need this option but do
  44           compat-independent messages instead!
  45
  46 menu "Networking options"
  47
  48 source "net/packet/Kconfig"
  49 source "net/unix/Kconfig"
  50 source "net/xfrm/Kconfig"
  51 source "net/iucv/Kconfig"
  52
  53 config INET
  54         bool "TCP/IP networking"
  55         select CRYPTO
  56         select CRYPTO_AES
  57         ---help---
  58           These are the protocols used on the Internet and on most local
  59           Ethernets. It is highly recommended to say Y here (this will enlarge
  60           your kernel by about 400 KB), since some programs (e.g. the X window
  61           system) use TCP/IP even if your machine is not connected to any
  62           other computer. You will get the so-called loopback device which
  63           allows you to ping yourself (great fun, that!).
  64
  65           For an excellent introduction to Linux networking, please read the
  66           Linux Networking HOWTO, available from
  67           <http://www.tldp.org/docs.html#howto>.
  68
  69           If you say Y here and also to "/proc file system support" and
  70           "Sysctl support" below, you can change various aspects of the
  71           behavior of the TCP/IP code by writing to the (virtual) files in
  72           /proc/sys/net/ipv4/*; the options are explained in the file
  73           <file:Documentation/networking/ip-sysctl.txt>.
  74
  75           Short answer: say Y.
  76
  77 if INET
  78 source "net/ipv4/Kconfig"
  79 source "net/ipv6/Kconfig"
  80 source "net/netlabel/Kconfig"
  81
  82 endif # if INET
  83
  84 config ANDROID_PARANOID_NETWORK
  85         bool "Only allow certain groups to create sockets"
  86         default y
  87         help
  88                 none
  89
  90 config NET_ACTIVITY_STATS
  91         bool "Network activity statistics tracking"
  92         default y
  93         help
  94          Network activity statistics are useful for tracking wireless
  95          modem activity on 2G, 3G, 4G wireless networks. Counts number of
  96          transmissions and groups them in specified time buckets.
  97
  98 config NETWORK_SECMARK
  99         bool "Security Marking"
 100         help
 101           This enables security marking of network packets, similar
 102           to nfmark, but designated for security purposes.
 103           If you are unsure how to answer this question, answer N.
 104
 105 config NETWORK_PHY_TIMESTAMPING
 106         bool "Timestamping in PHY devices"
 107         help
 108           This allows timestamping of network packets by PHYs with
 109           hardware timestamping capabilities. This option adds some
 110           overhead in the transmit and receive paths.
 111
 112           If you are unsure how to answer this question, answer N.
 113
 114 menuconfig NETFILTER
 115         bool "Network packet filtering framework (Netfilter)"
 116         ---help---
 117           Netfilter is a framework for filtering and mangling network packets
 118           that pass through your Linux box.
 119
 120           The most common use of packet filtering is to run your Linux box as
 121           a firewall protecting a local network from the Internet. The type of
 122           firewall provided by this kernel support is called a "packet
 123           filter", which means that it can reject individual network packets
 124           based on type, source, destination etc. The other kind of firewall,
 125           a "proxy-based" one, is more secure but more intrusive and more
 126           bothersome to set up; it inspects the network traffic much more
 127           closely, modifies it and has knowledge about the higher level
 128           protocols, which a packet filter lacks. Moreover, proxy-based
 129           firewalls often require changes to the programs running on the local
 130           clients. Proxy-based firewalls don't need support by the kernel, but
 131           they are often combined with a packet filter, which only works if
 132           you say Y here.
 133
 134           You should also say Y here if you intend to use your Linux box as
 135           the gateway to the Internet for a local network of machines without
 136           globally valid IP addresses. This is called "masquerading": if one
 137           of the computers on your local network wants to send something to
 138           the outside, your box can "masquerade" as that computer, i.e. it
 139           forwards the traffic to the intended outside destination, but
 140           modifies the packets to make it look like they came from the
 141           firewall box itself. It works both ways: if the outside host
 142           replies, the Linux box will silently forward the traffic to the
 143           correct local computer. This way, the computers on your local net
 144           are completely invisible to the outside world, even though they can
 145           reach the outside and can receive replies. It is even possible to
 146           run globally visible servers from within a masqueraded local network
 147           using a mechanism called portforwarding. Masquerading is also often
 148           called NAT (Network Address Translation).
 149
 150           Another use of Netfilter is in transparent proxying: if a machine on
 151           the local network tries to connect to an outside host, your Linux
 152           box can transparently forward the traffic to a local server,
 153           typically a caching proxy server.
 154
 155           Yet another use of Netfilter is building a bridging firewall. Using
 156           a bridge with Network packet filtering enabled makes iptables "see"
 157           the bridged traffic. For filtering on the lower network and Ethernet
 158           protocols over the bridge, use ebtables (under bridge netfilter
 159           configuration).
 160
 161           Various modules exist for netfilter which replace the previous
 162           masquerading (ipmasqadm), packet filtering (ipchains), transparent
 163           proxying, and portforwarding mechanisms. Please see
 164           <file:Documentation/Changes> under "iptables" for the location of
 165           these packages.
 166
 167 if NETFILTER
 168
 169 config NETFILTER_DEBUG
 170         bool "Network packet filtering debugging"
 171         depends on NETFILTER
 172         help
 173           You can say Y here if you want to get additional messages useful in
 174           debugging the netfilter code.
 175
 176 config NETFILTER_ADVANCED
 177         bool "Advanced netfilter configuration"
 178         depends on NETFILTER
 179         default y
 180         help
 181           If you say Y here you can select between all the netfilter modules.
 182           If you say N the more unusual ones will not be shown and the
 183           basic ones needed by most people will default to 'M'.
 184
 185           If unsure, say Y.
 186
 187 config BRIDGE_NETFILTER
 188         bool "Bridged IP/ARP packets filtering"
 189         depends on BRIDGE && NETFILTER && INET
 190         depends on NETFILTER_ADVANCED
 191         default y
 192         ---help---
 193           Enabling this option will let arptables resp. iptables see bridged
 194           ARP resp. IP traffic. If you want a bridging firewall, you probably
 195           want this option enabled.
 196           Enabling or disabling this option doesn't enable or disable
 197           ebtables.
 198
 199           If unsure, say N.
 200
 201 source "net/netfilter/Kconfig"
 202 source "net/ipv4/netfilter/Kconfig"
 203 source "net/ipv6/netfilter/Kconfig"
 204 source "net/decnet/netfilter/Kconfig"
 205 source "net/bridge/netfilter/Kconfig"
 206
 207 endif
 208
 209 source "net/dccp/Kconfig"
 210 source "net/sctp/Kconfig"
 211 source "net/rds/Kconfig"
 212 source "net/tipc/Kconfig"
 213 source "net/atm/Kconfig"
 214 source "net/l2tp/Kconfig"
 215 source "net/802/Kconfig"
 216 source "net/bridge/Kconfig"
 217 source "net/dsa/Kconfig"
 218 source "net/8021q/Kconfig"
 219 source "net/decnet/Kconfig"
 220 source "net/llc/Kconfig"
 221 source "net/ipx/Kconfig"
 222 source "drivers/net/appletalk/Kconfig"
 223 source "net/x25/Kconfig"
 224 source "net/lapb/Kconfig"
 225 source "net/phonet/Kconfig"
 226 source "net/ieee802154/Kconfig"
 227 source "net/mac802154/Kconfig"
 228 source "net/sched/Kconfig"
 229 source "net/dcb/Kconfig"
 230 source "net/dns_resolver/Kconfig"
 231 source "net/batman-adv/Kconfig"
 232 source "net/openvswitch/Kconfig"
 233 source "net/vmw_vsock/Kconfig"
 234 source "net/netlink/Kconfig"
 235
 236 config RPS
 237         boolean "RPS"
 238         depends on SMP && SYSFS && USE_GENERIC_SMP_HELPERS
 239         default y
 240
 241 config RFS_ACCEL
 242         boolean
 243         depends on RPS && GENERIC_HARDIRQS
 244         select CPU_RMAP
 245         default y
 246
 247 config XPS
 248         boolean
 249         depends on SMP && USE_GENERIC_SMP_HELPERS
 250         default y
 251
 252 config NETPRIO_CGROUP
 253         tristate "Network priority cgroup"
 254         depends on CGROUPS
 255         ---help---
 256           Cgroup subsystem for use in assigning processes to network priorities on
 257           a per-interface basis
 258
 259 config BQL
 260         boolean
 261         depends on SYSFS
 262         select DQL
 263         default y
 264
 265 config BPF_JIT
 266         bool "enable BPF Just In Time compiler"
 267         depends on HAVE_BPF_JIT
 268         depends on MODULES
 269         ---help---
 270           Berkeley Packet Filter filtering capabilities are normally handled
 271           by an interpreter. This option allows kernel to generate a native
 272           code when filter is loaded in memory. This should speedup
 273           packet sniffing (libpcap/tcpdump). Note : Admin should enable
 274           this feature changing /proc/sys/net/core/bpf_jit_enable
 275
 276 menu "Network testing"
 277
 278 config NET_PKTGEN
 279         tristate "Packet Generator (USE WITH CAUTION)"
 280         depends on PROC_FS
 281         ---help---
 282           This module will inject preconfigured packets, at a configurable
 283           rate, out of a given interface.  It is used for network interface
 284           stress testing and performance analysis.  If you don't understand
 285           what was just said, you don't need it: say N.
 286
 287           Documentation on how to use the packet generator can be found
 288           at <file:Documentation/networking/pktgen.txt>.
 289
 290           To compile this code as a module, choose M here: the
 291           module will be called pktgen.
 292
 293 config NET_TCPPROBE
 294         tristate "TCP connection probing"
 295         depends on INET && PROC_FS && KPROBES
 296         ---help---
 297         This module allows for capturing the changes to TCP connection
 298         state in response to incoming packets. It is used for debugging
 299         TCP congestion avoidance modules. If you don't understand
 300         what was just said, you don't need it: say N.
 301
 302         Documentation on how to use TCP connection probing can be found
 303         at:
 304
 305           http://www.linuxfoundation.org/collaborate/workgroups/networking/tcpprobe
 306
 307         To compile this code as a module, choose M here: the
 308         module will be called tcp_probe.
 309
 310 config NET_DROP_MONITOR
 311         tristate "Network packet drop alerting service"
 312         depends on INET && TRACEPOINTS
 313         ---help---
 314         This feature provides an alerting service to userspace in the
 315         event that packets are discarded in the network stack.  Alerts
 316         are broadcast via netlink socket to any listening user space
 317         process.  If you don't need network drop alerts, or if you are ok
 318         just checking the various proc files and other utilities for
 319         drop statistics, say N here.
 320
 321 endmenu
 322
 323 endmenu
 324
 325 source "net/ax25/Kconfig"
 326 source "net/can/Kconfig"
 327 source "net/irda/Kconfig"
 328 source "net/bluetooth/Kconfig"
 329 source "net/rxrpc/Kconfig"
 330
 331 config FIB_RULES
 332         bool
 333
 334 menuconfig WIRELESS
 335         bool "Wireless"
 336         depends on !S390
 337         default y
 338
 339 if WIRELESS
 340
 341 source "net/wireless/Kconfig"
 342 source "net/mac80211/Kconfig"
 343
 344 endif # WIRELESS
 345
 346 source "net/wimax/Kconfig"
 347
 348 source "net/rfkill/Kconfig"
 349 source "net/9p/Kconfig"
 350 source "net/caif/Kconfig"
 351 source "net/ceph/Kconfig"
 352 source "net/nfc/Kconfig"
 353
 354
 355 endif   # if NET
 356
 357 # Used by archs to tell that they support BPF_JIT
 358 config HAVE_BPF_JIT
 359         bool
 360
 361 #ADD NetWorking Log
 362 config MTK_NET_LOGGING
 363   bool "Networking log"
 364   default n