Kconfig 11 KB

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