diff options
Diffstat (limited to 'src/devices/nm-acd-manager.c')
| -rw-r--r-- | src/devices/nm-acd-manager.c | 495 |
1 files changed, 0 insertions, 495 deletions
diff --git a/src/devices/nm-acd-manager.c b/src/devices/nm-acd-manager.c deleted file mode 100644 index c9992ff5..00000000 --- a/src/devices/nm-acd-manager.c +++ /dev/null @@ -1,495 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -/* - * Copyright (C) 2015 - 2018 Red Hat, Inc. - */ - -#include "nm-default.h" - -#include "nm-acd-manager.h" - -#include <netinet/in.h> -#include <sys/types.h> -#include <sys/wait.h> - -#include "platform/nm-platform.h" -#include "nm-utils.h" -#include "NetworkManagerUtils.h" -#include "n-acd/src/n-acd.h" - -/*****************************************************************************/ - -typedef enum { - STATE_INIT, - STATE_PROBING, - STATE_PROBE_DONE, - STATE_ANNOUNCING, -} State; - -typedef struct { - in_addr_t address; - gboolean duplicate; - NAcdProbe *probe; -} AddressInfo; - -struct _NMAcdManager { - int ifindex; - guint8 hwaddr[ETH_ALEN]; - State state; - GHashTable *addresses; - guint completed; - NAcd * acd; - GSource * event_source; - - NMAcdCallbacks callbacks; - gpointer user_data; -}; - -/*****************************************************************************/ - -#define _NMLOG_DOMAIN LOGD_IP4 -#define _NMLOG_PREFIX_NAME "acd" -#define _NMLOG(level, ...) \ - G_STMT_START \ - { \ - char _sbuf[64]; \ - \ - nm_log((level), \ - _NMLOG_DOMAIN, \ - self && self->ifindex > 0 \ - ? nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex) \ - : NULL, \ - NULL, \ - "%s%s: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__), \ - _NMLOG_PREFIX_NAME, \ - self ? nm_sprintf_buf(_sbuf, "[%p,%d]", self, self->ifindex) \ - : "" _NM_UTILS_MACRO_REST(__VA_ARGS__)); \ - } \ - G_STMT_END - -/*****************************************************************************/ - -static const char * -_acd_event_to_string(unsigned int event) -{ - switch (event) { - case N_ACD_EVENT_READY: - return "ready"; - case N_ACD_EVENT_USED: - return "used"; - case N_ACD_EVENT_DEFENDED: - return "defended"; - case N_ACD_EVENT_CONFLICT: - return "conflict"; - case N_ACD_EVENT_DOWN: - return "down"; - } - return NULL; -} - -#define ACD_EVENT_TO_STRING_BUF_SIZE 50 - -static const char * -_acd_event_to_string_buf(unsigned event, char buffer[static ACD_EVENT_TO_STRING_BUF_SIZE]) -{ - const char *s; - - s = _acd_event_to_string(event); - if (s) - return s; - - g_snprintf(buffer, ACD_EVENT_TO_STRING_BUF_SIZE, "(%u)", event); - return buffer; -} - -static const char * -acd_error_to_string(int error) -{ - if (error < 0) - return nm_strerror_native(-error); - - switch (error) { - case _N_ACD_E_SUCCESS: - return "success"; - case N_ACD_E_PREEMPTED: - return "preempted"; - case N_ACD_E_INVALID_ARGUMENT: - return "invalid argument"; - } - - g_return_val_if_reached(NULL); -} - -static int -acd_error_to_nmerr(int error, gboolean always_fail) -{ - if (error < 0) - return -nm_errno_native(error); - - if (always_fail) { - if (NM_IN_SET(error, N_ACD_E_PREEMPTED, N_ACD_E_INVALID_ARGUMENT)) - return -NME_UNSPEC; - g_return_val_if_reached(-NME_UNSPEC); - } - - /* so, @error is either zero (indicating success) or one - * of the special status codes like N_ACD_E_*. In both cases, - * return the positive value here. */ - if (NM_IN_SET(error, _N_ACD_E_SUCCESS, N_ACD_E_PREEMPTED, N_ACD_E_INVALID_ARGUMENT)) - return error; - - g_return_val_if_reached(error); -} - -/*****************************************************************************/ - -/** - * nm_acd_manager_add_address: - * @self: a #NMAcdManager - * @address: an IP address - * - * Add @address to the list of IP addresses to probe. - - * Returns: %TRUE on success, %FALSE if the address was already in the list - */ -gboolean -nm_acd_manager_add_address(NMAcdManager *self, in_addr_t address) -{ - AddressInfo *info; - - g_return_val_if_fail(self, FALSE); - g_return_val_if_fail(self->state == STATE_INIT, FALSE); - - if (g_hash_table_lookup(self->addresses, GUINT_TO_POINTER(address))) - return FALSE; - - info = g_slice_new0(AddressInfo); - info->address = address; - - g_hash_table_insert(self->addresses, GUINT_TO_POINTER(address), info); - - return TRUE; -} - -static gboolean -acd_event(int fd, GIOCondition condition, gpointer data) -{ - NMAcdManager *self = data; - NAcdEvent * event; - AddressInfo * info; - gboolean emit_probe_terminated = FALSE; - char address_str[INET_ADDRSTRLEN]; - int r; - - if (n_acd_dispatch(self->acd)) - return G_SOURCE_CONTINUE; - - while (!n_acd_pop_event(self->acd, &event) && event) { - char to_string_buffer[ACD_EVENT_TO_STRING_BUF_SIZE]; - gs_free char *hwaddr_str = NULL; - gboolean check_probing_done = FALSE; - - switch (event->event) { - case N_ACD_EVENT_READY: - n_acd_probe_get_userdata(event->ready.probe, (void **) &info); - info->duplicate = FALSE; - if (self->state == STATE_ANNOUNCING) { - /* fake probe ended, start announcing */ - r = n_acd_probe_announce(info->probe, N_ACD_DEFEND_ONCE); - if (r) { - _LOGW("couldn't announce address %s on interface '%s': %s", - _nm_utils_inet4_ntop(info->address, address_str), - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex), - acd_error_to_string(r)); - } else { - _LOGD("announcing address %s", - _nm_utils_inet4_ntop(info->address, address_str)); - } - } - check_probing_done = TRUE; - break; - case N_ACD_EVENT_USED: - n_acd_probe_get_userdata(event->used.probe, (void **) &info); - info->duplicate = TRUE; - check_probing_done = TRUE; - break; - case N_ACD_EVENT_DEFENDED: - n_acd_probe_get_userdata(event->defended.probe, (void **) &info); - _LOGD("defended address %s from host %s", - _nm_utils_inet4_ntop(info->address, address_str), - (hwaddr_str = - nm_utils_hwaddr_ntoa(event->defended.sender, event->defended.n_sender))); - break; - case N_ACD_EVENT_CONFLICT: - n_acd_probe_get_userdata(event->conflict.probe, (void **) &info); - _LOGW("conflict for address %s detected with host %s on interface '%s'", - _nm_utils_inet4_ntop(info->address, address_str), - (hwaddr_str = - nm_utils_hwaddr_ntoa(event->defended.sender, event->defended.n_sender)), - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex)); - break; - default: - _LOGD("unhandled event '%s'", _acd_event_to_string_buf(event->event, to_string_buffer)); - break; - } - - if (check_probing_done && self->state == STATE_PROBING - && ++self->completed == g_hash_table_size(self->addresses)) { - self->state = STATE_PROBE_DONE; - emit_probe_terminated = TRUE; - } - } - - if (emit_probe_terminated) { - if (self->callbacks.probe_terminated_callback) { - self->callbacks.probe_terminated_callback(self, self->user_data); - } - } - - return G_SOURCE_CONTINUE; -} - -static gboolean -acd_probe_add(NMAcdManager *self, AddressInfo *info, guint64 timeout) -{ - NAcdProbeConfig *probe_config; - int r; - char sbuf[NM_UTILS_INET_ADDRSTRLEN]; - - r = n_acd_probe_config_new(&probe_config); - if (r) { - _LOGW("could not create probe config for %s on interface '%s': %s", - _nm_utils_inet4_ntop(info->address, sbuf), - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex), - acd_error_to_string(r)); - return FALSE; - } - - n_acd_probe_config_set_ip(probe_config, (struct in_addr){info->address}); - n_acd_probe_config_set_timeout(probe_config, timeout); - - r = n_acd_probe(self->acd, &info->probe, probe_config); - if (r) { - _LOGW("could not start probe for %s on interface '%s': %s", - _nm_utils_inet4_ntop(info->address, sbuf), - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex), - acd_error_to_string(r)); - n_acd_probe_config_free(probe_config); - return FALSE; - } - - n_acd_probe_set_userdata(info->probe, info); - n_acd_probe_config_free(probe_config); - - return TRUE; -} - -static int -acd_init(NMAcdManager *self) -{ - NAcdConfig *config; - int r; - - if (self->acd) - return 0; - - r = n_acd_config_new(&config); - if (r) - return r; - - n_acd_config_set_ifindex(config, self->ifindex); - n_acd_config_set_transport(config, N_ACD_TRANSPORT_ETHERNET); - n_acd_config_set_mac(config, self->hwaddr, ETH_ALEN); - - r = n_acd_new(&self->acd, config); - n_acd_config_free(config); - return r; -} - -/** - * nm_acd_manager_start_probe: - * @self: a #NMAcdManager - * @timeout: maximum probe duration in milliseconds - * @error: location to store error, or %NULL - * - * Start probing IP addresses for duplicates; when the probe terminates a - * PROBE_TERMINATED signal is emitted. - * - * Returns: 0 on success or a negative NetworkManager error code (NME_*). - */ -int -nm_acd_manager_start_probe(NMAcdManager *self, guint timeout) -{ - GHashTableIter iter; - AddressInfo * info; - gboolean success = FALSE; - int fd, r; - - g_return_val_if_fail(self, FALSE); - g_return_val_if_fail(self->state == STATE_INIT, FALSE); - - r = acd_init(self); - if (r) { - _LOGW("couldn't init ACD for probing on interface '%s': %s", - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex), - acd_error_to_string(r)); - return acd_error_to_nmerr(r, TRUE); - } - - self->completed = 0; - - g_hash_table_iter_init(&iter, self->addresses); - while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &info)) - success |= acd_probe_add(self, info, timeout); - - if (success) - self->state = STATE_PROBING; - - nm_assert(!self->event_source); - n_acd_get_fd(self->acd, &fd); - self->event_source = - nm_g_unix_fd_source_new(fd, G_IO_IN, G_PRIORITY_DEFAULT, acd_event, self, NULL); - g_source_attach(self->event_source, NULL); - - return success ? 0 : -NME_UNSPEC; -} - -/** - * nm_acd_manager_check_address: - * @self: a #NMAcdManager - * @address: an IP address - * - * Check if an IP address is duplicate. @address must have been added with - * nm_acd_manager_add_address(). - * - * Returns: %TRUE if the address is not duplicate, %FALSE otherwise - */ -gboolean -nm_acd_manager_check_address(NMAcdManager *self, in_addr_t address) -{ - AddressInfo *info; - - g_return_val_if_fail(self, FALSE); - g_return_val_if_fail(NM_IN_SET(self->state, STATE_INIT, STATE_PROBE_DONE), FALSE); - - info = g_hash_table_lookup(self->addresses, GUINT_TO_POINTER(address)); - g_return_val_if_fail(info, FALSE); - - return !info->duplicate; -} - -/** - * nm_acd_manager_announce_addresses: - * @self: a #NMAcdManager - * - * Start announcing addresses. - * - * Returns: a negative NetworkManager error number or zero on success. - */ -int -nm_acd_manager_announce_addresses(NMAcdManager *self) -{ - GHashTableIter iter; - AddressInfo * info; - int r; - int fd; - gboolean success = TRUE; - - r = acd_init(self); - if (r) { - _LOGW("couldn't init ACD for announcing addresses on interface '%s': %s", - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex), - acd_error_to_string(r)); - return acd_error_to_nmerr(r, TRUE); - } - - if (self->state == STATE_INIT) { - /* n-acd can't announce without probing, therefore let's - * start a fake probe with zero timeout and then perform - * the announcement. */ - g_hash_table_iter_init(&iter, self->addresses); - while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &info)) { - if (!acd_probe_add(self, info, 0)) - success = FALSE; - } - self->state = STATE_ANNOUNCING; - } else if (self->state == STATE_ANNOUNCING) { - char sbuf[NM_UTILS_INET_ADDRSTRLEN]; - - g_hash_table_iter_init(&iter, self->addresses); - while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &info)) { - if (info->duplicate) - continue; - r = n_acd_probe_announce(info->probe, N_ACD_DEFEND_ONCE); - if (r) { - _LOGW("couldn't announce address %s on interface '%s': %s", - _nm_utils_inet4_ntop(info->address, sbuf), - nm_platform_link_get_name(NM_PLATFORM_GET, self->ifindex), - acd_error_to_string(r)); - success = FALSE; - } else - _LOGD("announcing address %s", _nm_utils_inet4_ntop(info->address, sbuf)); - } - } - - if (!self->event_source) { - n_acd_get_fd(self->acd, &fd); - self->event_source = - nm_g_unix_fd_source_new(fd, G_IO_IN, G_PRIORITY_DEFAULT, acd_event, self, NULL); - g_source_attach(self->event_source, NULL); - } - - return success ? 0 : -NME_UNSPEC; -} - -static void -destroy_address_info(gpointer data) -{ - AddressInfo *info = (AddressInfo *) data; - - n_acd_probe_free(info->probe); - - g_slice_free(AddressInfo, info); -} - -/*****************************************************************************/ - -NMAcdManager * -nm_acd_manager_new(int ifindex, - const guint8 * hwaddr, - guint hwaddr_len, - const NMAcdCallbacks *callbacks, - gpointer user_data) -{ - NMAcdManager *self; - - g_return_val_if_fail(ifindex > 0, NULL); - g_return_val_if_fail(hwaddr, NULL); - g_return_val_if_fail(hwaddr_len == ETH_ALEN, NULL); - - self = g_slice_new0(NMAcdManager); - - if (callbacks) - self->callbacks = *callbacks; - self->user_data = user_data; - - self->addresses = g_hash_table_new_full(nm_direct_hash, NULL, NULL, destroy_address_info); - self->state = STATE_INIT; - self->ifindex = ifindex; - memcpy(self->hwaddr, hwaddr, ETH_ALEN); - return self; -} - -void -nm_acd_manager_free(NMAcdManager *self) -{ - g_return_if_fail(self); - - if (self->callbacks.user_data_destroy) - self->callbacks.user_data_destroy(self->user_data); - - nm_clear_pointer(&self->addresses, g_hash_table_destroy); - nm_clear_g_source_inst(&self->event_source); - nm_clear_pointer(&self->acd, n_acd_unref); - - g_slice_free(NMAcdManager, self); -} |