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Diffstat (limited to 'src/libsystemd-network/sd-ipv4ll.c')
-rw-r--r--src/libsystemd-network/sd-ipv4ll.c344
1 files changed, 0 insertions, 344 deletions
diff --git a/src/libsystemd-network/sd-ipv4ll.c b/src/libsystemd-network/sd-ipv4ll.c
deleted file mode 100644
index 13209261f9..0000000000
--- a/src/libsystemd-network/sd-ipv4ll.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright (C) 2014 Axis Communications AB. All rights reserved.
- Copyright (C) 2015 Tom Gundersen
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <arpa/inet.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "sd-ipv4acd.h"
-#include "sd-ipv4ll.h"
-
-#include "alloc-util.h"
-#include "ether-addr-util.h"
-#include "in-addr-util.h"
-#include "list.h"
-#include "random-util.h"
-#include "siphash24.h"
-#include "sparse-endian.h"
-#include "string-util.h"
-#include "util.h"
-
-#define IPV4LL_NETWORK UINT32_C(0xA9FE0000)
-#define IPV4LL_NETMASK UINT32_C(0xFFFF0000)
-
-#define IPV4LL_DONT_DESTROY(ll) \
- _cleanup_(sd_ipv4ll_unrefp) _unused_ sd_ipv4ll *_dont_destroy_##ll = sd_ipv4ll_ref(ll)
-
-struct sd_ipv4ll {
- unsigned n_ref;
-
- sd_ipv4acd *acd;
-
- be32_t address; /* the address pushed to ACD */
- struct ether_addr mac;
-
- struct {
- le64_t value;
- le64_t generation;
- } seed;
- bool seed_set;
-
- /* External */
- be32_t claimed_address;
-
- sd_ipv4ll_callback_t callback;
- void* userdata;
-};
-
-#define log_ipv4ll_errno(ll, error, fmt, ...) log_internal(LOG_DEBUG, error, __FILE__, __LINE__, __func__, "IPV4LL: " fmt, ##__VA_ARGS__)
-#define log_ipv4ll(ll, fmt, ...) log_ipv4ll_errno(ll, 0, fmt, ##__VA_ARGS__)
-
-static void ipv4ll_on_acd(sd_ipv4acd *ll, int event, void *userdata);
-
-sd_ipv4ll *sd_ipv4ll_ref(sd_ipv4ll *ll) {
- if (!ll)
- return NULL;
-
- assert(ll->n_ref >= 1);
- ll->n_ref++;
-
- return ll;
-}
-
-sd_ipv4ll *sd_ipv4ll_unref(sd_ipv4ll *ll) {
- if (!ll)
- return NULL;
-
- assert(ll->n_ref >= 1);
- ll->n_ref--;
-
- if (ll->n_ref > 0)
- return NULL;
-
- sd_ipv4acd_unref(ll->acd);
- return mfree(ll);
-}
-
-int sd_ipv4ll_new(sd_ipv4ll **ret) {
- _cleanup_(sd_ipv4ll_unrefp) sd_ipv4ll *ll = NULL;
- int r;
-
- assert_return(ret, -EINVAL);
-
- ll = new0(sd_ipv4ll, 1);
- if (!ll)
- return -ENOMEM;
-
- ll->n_ref = 1;
-
- r = sd_ipv4acd_new(&ll->acd);
- if (r < 0)
- return r;
-
- r = sd_ipv4acd_set_callback(ll->acd, ipv4ll_on_acd, ll);
- if (r < 0)
- return r;
-
- *ret = ll;
- ll = NULL;
-
- return 0;
-}
-
-int sd_ipv4ll_stop(sd_ipv4ll *ll) {
- assert_return(ll, -EINVAL);
-
- return sd_ipv4acd_stop(ll->acd);
-}
-
-int sd_ipv4ll_set_ifindex(sd_ipv4ll *ll, int ifindex) {
- assert_return(ll, -EINVAL);
- assert_return(ifindex > 0, -EINVAL);
- assert_return(sd_ipv4ll_is_running(ll) == 0, -EBUSY);
-
- return sd_ipv4acd_set_ifindex(ll->acd, ifindex);
-}
-
-int sd_ipv4ll_set_mac(sd_ipv4ll *ll, const struct ether_addr *addr) {
- int r;
-
- assert_return(ll, -EINVAL);
- assert_return(addr, -EINVAL);
- assert_return(sd_ipv4ll_is_running(ll) == 0, -EBUSY);
-
- r = sd_ipv4acd_set_mac(ll->acd, addr);
- if (r < 0)
- return r;
-
- ll->mac = *addr;
- return 0;
-}
-
-int sd_ipv4ll_detach_event(sd_ipv4ll *ll) {
- assert_return(ll, -EINVAL);
-
- return sd_ipv4acd_detach_event(ll->acd);
-}
-
-int sd_ipv4ll_attach_event(sd_ipv4ll *ll, sd_event *event, int64_t priority) {
- assert_return(ll, -EINVAL);
-
- return sd_ipv4acd_attach_event(ll->acd, event, priority);
-}
-
-int sd_ipv4ll_set_callback(sd_ipv4ll *ll, sd_ipv4ll_callback_t cb, void *userdata) {
- assert_return(ll, -EINVAL);
-
- ll->callback = cb;
- ll->userdata = userdata;
-
- return 0;
-}
-
-int sd_ipv4ll_get_address(sd_ipv4ll *ll, struct in_addr *address) {
- assert_return(ll, -EINVAL);
- assert_return(address, -EINVAL);
-
- if (ll->claimed_address == 0)
- return -ENOENT;
-
- address->s_addr = ll->claimed_address;
-
- return 0;
-}
-
-int sd_ipv4ll_set_address_seed(sd_ipv4ll *ll, uint64_t seed) {
- assert_return(ll, -EINVAL);
- assert_return(sd_ipv4ll_is_running(ll) == 0, -EBUSY);
-
- ll->seed.value = htole64(seed);
- ll->seed_set = true;
-
- return 0;
-}
-
-int sd_ipv4ll_is_running(sd_ipv4ll *ll) {
- assert_return(ll, false);
-
- return sd_ipv4acd_is_running(ll->acd);
-}
-
-static bool ipv4ll_address_is_valid(const struct in_addr *address) {
- assert(address);
-
- if (!in_addr_is_link_local(AF_INET, (const union in_addr_union *) address))
- return false;
-
- return !IN_SET(be32toh(address->s_addr) & 0x0000FF00U, 0x0000U, 0xFF00U);
-}
-
-int sd_ipv4ll_set_address(sd_ipv4ll *ll, const struct in_addr *address) {
- int r;
-
- assert_return(ll, -EINVAL);
- assert_return(address, -EINVAL);
- assert_return(ipv4ll_address_is_valid(address), -EINVAL);
-
- r = sd_ipv4acd_set_address(ll->acd, address);
- if (r < 0)
- return r;
-
- ll->address = address->s_addr;
-
- return 0;
-}
-
-#define PICK_HASH_KEY SD_ID128_MAKE(15,ac,82,a6,d6,3f,49,78,98,77,5d,0c,69,02,94,0b)
-
-static int ipv4ll_pick_address(sd_ipv4ll *ll) {
- _cleanup_free_ char *address = NULL;
- be32_t addr;
-
- assert(ll);
-
- do {
- uint64_t h;
-
- h = siphash24(&ll->seed, sizeof(ll->seed), PICK_HASH_KEY.bytes);
-
- /* Increase the generation counter by one */
- ll->seed.generation = htole64(le64toh(ll->seed.generation) + 1);
-
- addr = htobe32((h & UINT32_C(0x0000FFFF)) | IPV4LL_NETWORK);
- } while (addr == ll->address ||
- IN_SET(be32toh(addr) & 0x0000FF00U, 0x0000U, 0xFF00U));
-
- (void) in_addr_to_string(AF_INET, &(union in_addr_union) { .in.s_addr = addr }, &address);
- log_ipv4ll(ll, "Picked new IP address %s.", strna(address));
-
- return sd_ipv4ll_set_address(ll, &(struct in_addr) { addr });
-}
-
-#define MAC_HASH_KEY SD_ID128_MAKE(df,04,22,98,3f,ad,14,52,f9,87,2e,d1,9c,70,e2,f2)
-
-int sd_ipv4ll_start(sd_ipv4ll *ll) {
- int r;
- bool picked_address = false;
-
- assert_return(ll, -EINVAL);
- assert_return(!ether_addr_is_null(&ll->mac), -EINVAL);
- assert_return(sd_ipv4ll_is_running(ll) == 0, -EBUSY);
-
- /* If no random seed is set, generate some from the MAC address */
- if (!ll->seed_set)
- ll->seed.value = htole64(siphash24(ll->mac.ether_addr_octet, ETH_ALEN, MAC_HASH_KEY.bytes));
-
- /* Restart the generation counter. */
- ll->seed.generation = 0;
-
- if (ll->address == 0) {
- r = ipv4ll_pick_address(ll);
- if (r < 0)
- return r;
-
- picked_address = true;
- }
-
- r = sd_ipv4acd_start(ll->acd);
- if (r < 0) {
-
- /* We couldn't start? If so, let's forget the picked address again, the user might make a change and
- * retry, and we want the new data to take effect when picking an address. */
- if (picked_address)
- ll->address = 0;
-
- return r;
- }
-
- return 0;
-}
-
-static void ipv4ll_client_notify(sd_ipv4ll *ll, int event) {
- assert(ll);
-
- if (ll->callback)
- ll->callback(ll, event, ll->userdata);
-}
-
-void ipv4ll_on_acd(sd_ipv4acd *acd, int event, void *userdata) {
- sd_ipv4ll *ll = userdata;
- IPV4LL_DONT_DESTROY(ll);
- int r;
-
- assert(acd);
- assert(ll);
-
- switch (event) {
-
- case SD_IPV4ACD_EVENT_STOP:
- ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_STOP);
- ll->claimed_address = 0;
- break;
-
- case SD_IPV4ACD_EVENT_BIND:
- ll->claimed_address = ll->address;
- ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_BIND);
- break;
-
- case SD_IPV4ACD_EVENT_CONFLICT:
- /* if an address was already bound we must call up to the
- user to handle this, otherwise we just try again */
- if (ll->claimed_address != 0) {
- ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_CONFLICT);
-
- ll->claimed_address = 0;
- } else {
- r = ipv4ll_pick_address(ll);
- if (r < 0)
- goto error;
-
- r = sd_ipv4acd_start(ll->acd);
- if (r < 0)
- goto error;
- }
-
- break;
-
- default:
- assert_not_reached("Invalid IPv4ACD event.");
- }
-
- return;
-
-error:
- ipv4ll_client_notify(ll, SD_IPV4LL_EVENT_STOP);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 13:18:42 +0000