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Jason Reeder 0e28a30033 libsystemd-network: ipv4ll probe conflict counter (#5361) 
A bug exists where the conflict counter is cleared
regardless of whether or not the next probe attempt leads to
a successful address acquisition. This causes 'bursts' of
MAX_CONFLICTS probes followed by a delay of
RATE_LIMIT_INTERVAL instead of a single probe each
RATE_LIMIT_INTERVAL when beyond MAX_CONFLICTS.

The conflict counter should only be cleared after an
address is successfully acquired. This commit achieves that
goal.

From RFC3927:
A host should maintain a counter of the number of address
conflicts it has experienced in the process of trying to
acquire an address, and if the number of conflicts exceeds
MAX_CONFLICTS then the host MUST limit the rate at which it
probes for new addresses to no more than one new address per
RATE_LIMIT_INTERVAL.  This is to prevent catastrophic ARP
storms in pathological failure cases, such as a rogue host
that answers all ARP probes, causing legitimate hosts to go
into an infinite loop attempting to select a usable address.

Signed-off-by: Jason Reeder <jasonreeder@gmail.com>

(cherry picked from commit 0cbc024d591e1b1095d90494e0337dabd9ef2e19)
(cherry picked from commit eb8fd9cdfd)
2018-10-29 21:18:43 +01:00
..
devices wifi: fix leaking fake AP in NMDeviceWifi's act_stage1_prepare() 2018-09-13 16:31:21 +02:00
dhcp-manager dhcp: fix leak in dhclient's dhclient_start() 2018-09-10 14:40:28 +02:00
dns-manager all: use O_CLOEXEC for file descriptors 2016-12-15 17:52:33 +01:00
dnsmasq-manager all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
platform platform: filter out invisible links for cache lookup by name 2017-03-09 15:22:54 +01:00
ppp-manager ppp: only request IPV6CP when IPv6 is enabled in the connection 2017-03-22 08:26:28 -05:00
rdisc core: use _NM_GET_PRIVATE() macros 2016-09-08 00:26:14 +02:00
settings build: fix type on Makefile.am 2017-04-20 15:54:57 +02:00
supplicant-manager device/wifi: drop messing with wpa-supplicant's support for MAC address randomization 2017-02-07 14:39:40 +01:00
systemd libsystemd-network: ipv4ll probe conflict counter (#5361) 2018-10-29 21:18:43 +01:00
tests all: use O_CLOEXEC for file descriptors 2016-12-15 17:52:33 +01:00
vpn-manager vpn: add device route to VPN gateway if parent has no gateway 2017-01-07 15:07:29 +01:00
main-utils.c all: use O_CLOEXEC for file descriptors 2016-12-15 17:52:33 +01:00
main-utils.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
main.c config: refactor change-flags to be a cause/reason which triggered the change 2016-06-01 19:06:34 +02:00
Makefile.am dhcp: add new header "nm-dhcp-helper-api.h" 2016-09-08 00:26:14 +02:00
NetworkManager.ver build: export _IO_stdin_used symbol in NetworkManager.ver 2016-08-28 16:56:25 +02:00
NetworkManagerUtils.c device: fix nm_utils_match_connection() for NMSettingInfiniband:mac-address 2016-09-22 16:49:15 +02:00
NetworkManagerUtils.h utils: inject platform into nm_utils_complete_generic() 2016-03-15 12:56:58 +01:00
nm-activation-request.c act-request: queue failing the slave when master fails 2016-08-17 15:36:05 +02:00
nm-activation-request.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-active-connection.c core: use define for signal name in nm_active_connection_set_device() 2016-08-22 16:25:33 +02:00
nm-active-connection.h active-connection: add parent active connection tracking 2016-03-26 11:31:18 +01:00
nm-audit-manager.c checkpoint: add audit support 2016-08-17 14:55:34 +02:00
nm-audit-manager.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-auth-manager.c auth: downgrade g_assert() to nm_assert() 2016-04-05 10:39:20 +02:00
nm-auth-manager.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-auth-subject.c core: use _NM_GET_PRIVATE() macros 2016-09-08 00:26:14 +02:00
nm-auth-subject.h auth: embed private data NMAuthSubjectPrivate in NMAuthSubject struct 2016-05-12 10:24:36 +02:00
nm-auth-utils.c core: fix builds without polkit support 2016-08-17 11:28:55 +02:00
nm-auth-utils.h all: move NM_AUTH_PERMISSION_* defines to "nm-common-macros.h" header 2016-06-01 19:06:35 +02:00
nm-bus-manager.c bus-manager: don't leak connections 2017-10-15 10:29:19 +02:00
nm-bus-manager.h core: check valid uid for D-Bus load_connection(s)/set_logging calls 2016-08-23 11:24:19 +02:00
nm-checkpoint-manager.c checkpoint: add create, rollback and destroy D-Bus API 2016-08-17 14:55:34 +02:00
nm-checkpoint-manager.h checkpoint: add create, rollback and destroy D-Bus API 2016-08-17 14:55:34 +02:00
nm-checkpoint.c core: use _NM_GET_PRIVATE() macros 2016-09-08 00:26:14 +02:00
nm-checkpoint.h checkpoint: add create, rollback and destroy D-Bus API 2016-08-17 14:55:34 +02:00
nm-config-data.c config: make "ignore-carrier" a per-device configuration option 2016-06-30 08:27:17 +02:00
nm-config-data.h config: add support for per-device configuration to NetworkManager.conf 2016-06-30 08:07:35 +02:00
nm-config.c device: treat fake permanent MAC address mostly like a real one 2016-11-03 12:24:01 +01:00
nm-config.h config: make "ignore-carrier" a per-device configuration option 2016-06-30 08:27:17 +02:00
nm-connectivity.c nm-dispatcher: Added new 'connectivity-state' parameter to private D-Bus API 2016-07-28 22:22:14 +02:00
nm-connectivity.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-core-utils.c all: use O_CLOEXEC for file descriptors 2016-12-15 17:52:33 +01:00
nm-core-utils.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-dcb.c all: cleanup includes and let "nm-default.h" include "config.h" 2016-02-19 17:53:25 +01:00
nm-dcb.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-default-route-manager.c default-route-manager: decryptify logging line for default-route-manager 2017-04-03 13:30:50 +02:00
nm-default-route-manager.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-dhcp4-config.c all: cleanup includes and let "nm-default.h" include "config.h" 2016-02-19 17:53:25 +01:00
nm-dhcp4-config.h core: port NMDhcp4Config/NMDhcp6Config to GVariant 2015-07-24 13:25:47 -04:00
nm-dhcp6-config.c all: cleanup includes and let "nm-default.h" include "config.h" 2016-02-19 17:53:25 +01:00
nm-dhcp6-config.h core: port NMDhcp4Config/NMDhcp6Config to GVariant 2015-07-24 13:25:47 -04:00
nm-dispatcher.c nm-dispatcher: Added new 'connectivity-state' parameter to private D-Bus API 2016-07-28 22:22:14 +02:00
nm-dispatcher.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-exported-object.c exported-object: use _NMLOG2() macro for logging property-changed signal 2016-09-02 20:17:42 +02:00
nm-exported-object.h build: cleanup src/Makefile.am 2016-08-11 11:54:18 +02:00
nm-firewall-manager.c core: use defines for signal names in NMDnsManager and NMFirewallManager 2016-04-04 16:48:10 +02:00
nm-firewall-manager.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-iface-helper.c dbus: fix emitting D-Bus NetworkManager's old-style PropertiesChange signal 2016-09-02 20:17:42 +02:00
nm-ip4-config.c ip4-config: sort addresses only when reading the property value 2016-12-09 14:18:56 +01:00
nm-ip4-config.h ip4-config: sort addresses only when reading the property value 2016-12-09 14:18:56 +01:00
nm-ip6-config.c ip6-config: sort addresses only when reading the property value 2016-12-09 14:30:57 +01:00
nm-ip6-config.h ip6-config: add nm_ip6_config_set_privacy() 2016-12-09 14:30:46 +01:00
nm-logging.c logging: don't round subsecond part in logging timestamp 2016-09-08 00:26:14 +02:00
nm-logging.h logging: remove LOGD_HW alias for LOGD_PLATFORM 2016-11-03 12:23:07 +01:00
nm-manager.c device: fix restricting Generic connection by interface-name 2017-04-26 21:14:13 +02:00
nm-manager.h ifcfg-rh: write the master device name even if the master property is an UUID 2017-01-12 19:08:31 +01:00
nm-multi-index.c libnm,core: fix syntax of 'transfer' annotation 2016-02-24 17:23:01 +01:00
nm-multi-index.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-policy.c policy: fix memleak in lookup_callback() and cancelling 2017-05-02 18:30:09 +02:00
nm-policy.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-rfkill-manager.c logging: remove LOGD_HW alias for LOGD_PLATFORM 2016-11-03 12:23:07 +01:00
nm-rfkill-manager.h core: use #define for "rfkill-changed" signal name 2016-08-23 11:46:28 +02:00
nm-route-manager.c core/trivial: rename "source" field of addresses and routes 2016-04-28 12:53:21 +02:00
nm-route-manager.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-session-monitor.c session-monitor: fix parsing of ConsoleKit database 2016-10-13 09:48:45 +02:00
nm-session-monitor.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-sleep-monitor.c sleep-monitor: add functions for delaying the suspension 2016-05-13 14:34:53 +02:00
nm-sleep-monitor.h all: cleanup includes in header files 2016-08-17 19:51:17 +02:00
nm-test-utils-core.h shared: move shared files to subdirectory "shared/nm-utils/" 2016-06-16 10:45:53 +02:00
nm-types.h platform/trivial: rename NM_LINK_TYPE_WWAN_ETHERNET to NM_LINK_TYPE_WWAN_NET 2016-06-17 11:00:10 +02:00
org.freedesktop.NetworkManager.conf dns: use DBus to make dnsmasq nameserver changes 2016-04-21 15:32:07 +02:00