Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 210 insertions, 0 deletions

diff --git a/src/network/networkd-dhcp-server-static-lease.c b/src/network/networkd-dhcp-server-static-lease.c
new file mode 100644
index 0000000..8e7eec6
--- /dev/null
+++ b/src/network/networkd-dhcp-server-static-lease.c
@@ -0,0 +1,210 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "ether-addr-util.h"
+#include "hashmap.h"
+#include "networkd-dhcp-server-static-lease.h"
+#include "networkd-network.h"
+#include "networkd-util.h"
+
+DEFINE_SECTION_CLEANUP_FUNCTIONS(DHCPStaticLease, dhcp_static_lease_free);
+
+DHCPStaticLease *dhcp_static_lease_free(DHCPStaticLease *static_lease) {
+        if (!static_lease)
+                return NULL;
+
+        if (static_lease->network && static_lease->section)
+                hashmap_remove(static_lease->network->dhcp_static_leases_by_section, static_lease->section);
+
+        config_section_free(static_lease->section);
+        free(static_lease->client_id);
+        return mfree(static_lease);
+}
+
+static int dhcp_static_lease_new(DHCPStaticLease **ret) {
+        DHCPStaticLease *p;
+
+        assert(ret);
+
+        p = new0(DHCPStaticLease, 1);
+        if (!p)
+                return -ENOMEM;
+
+        *ret = TAKE_PTR(p);
+        return 0;
+}
+
+static int lease_new_static(Network *network, const char *filename, unsigned section_line, DHCPStaticLease **ret) {
+        _cleanup_(config_section_freep) ConfigSection *n = NULL;
+        _cleanup_(dhcp_static_lease_freep) DHCPStaticLease *static_lease = NULL;
+        int r;
+
+        assert(network);
+        assert(filename);
+        assert(section_line > 0);
+        assert(ret);
+
+        r = config_section_new(filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        static_lease = hashmap_get(network->dhcp_static_leases_by_section, n);
+        if (static_lease) {
+                *ret = TAKE_PTR(static_lease);
+                return 0;
+        }
+
+        r = dhcp_static_lease_new(&static_lease);
+        if (r < 0)
+                return r;
+
+        static_lease->network = network;
+        static_lease->section = TAKE_PTR(n);
+        r = hashmap_ensure_put(&network->dhcp_static_leases_by_section, &config_section_hash_ops, static_lease->section, static_lease);
+        if (r < 0)
+                return r;
+
+        *ret = TAKE_PTR(static_lease);
+        return 0;
+}
+
+static int static_lease_verify(DHCPStaticLease *static_lease) {
+        if (section_is_invalid(static_lease->section))
+                return -EINVAL;
+
+        if (in4_addr_is_null(&static_lease->address))
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: DHCP static lease without Address= field configured. "
+                                         "Ignoring [DHCPServerStaticLease] section from line %u.",
+                                         static_lease->section->filename, static_lease->section->line);
+
+        /* TODO: check that the address is in the pool. */
+
+        if (static_lease->client_id_size == 0 || !static_lease->client_id)
+                return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+                                         "%s: DHCP static lease without MACAddress= field configured. "
+                                         "Ignoring [DHCPServerStaticLease] section from line %u.",
+                                         static_lease->section->filename, static_lease->section->line);
+
+        assert(static_lease->client_id_size == ETH_ALEN + 1);
+
+        return 0;
+}
+
+void network_drop_invalid_static_leases(Network *network) {
+        DHCPStaticLease *static_lease;
+
+        assert(network);
+
+        HASHMAP_FOREACH(static_lease, network->dhcp_static_leases_by_section)
+                if (static_lease_verify(static_lease) < 0)
+                        dhcp_static_lease_free(static_lease);
+}
+
+int config_parse_dhcp_static_lease_address(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(dhcp_static_lease_free_or_set_invalidp) DHCPStaticLease *lease = NULL;
+        Network *network = ASSERT_PTR(userdata);
+        union in_addr_union addr;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = lease_new_static(network, filename, section_line, &lease);
+        if (r < 0)
+                return log_oom();
+
+        if (isempty(rvalue)) {
+                lease->address.s_addr = 0;
+                TAKE_PTR(lease);
+                return 0;
+        }
+
+        r = in_addr_from_string(AF_INET, rvalue, &addr);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse IPv4 address for DHCPv4 static lease, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+        if (in4_addr_is_null(&addr.in)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "IPv4 address for DHCPv4 static lease cannot be the ANY address, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        lease->address = addr.in;
+
+        TAKE_PTR(lease);
+        return 0;
+}
+
+int config_parse_dhcp_static_lease_hwaddr(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        _cleanup_(dhcp_static_lease_free_or_set_invalidp) DHCPStaticLease *lease = NULL;
+        Network *network = ASSERT_PTR(userdata);
+        struct ether_addr hwaddr;
+        uint8_t *c;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = lease_new_static(network, filename, section_line, &lease);
+        if (r < 0)
+                return log_oom();
+
+        if (isempty(rvalue)) {
+                lease->client_id = mfree(lease->client_id);
+                lease->client_id_size = 0;
+                return 0;
+        }
+
+        r = parse_ether_addr(rvalue, &hwaddr);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse MAC address for DHCPv4 static lease, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+        if (ether_addr_is_null(&hwaddr) || (hwaddr.ether_addr_octet[0] & 0x01)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "MAC address for DHCPv4 static lease cannot be null or multicast, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        c = new(uint8_t, ETH_ALEN + 1);
+        if (!c)
+                return log_oom();
+
+        /* set client id type to 1: Ethernet Link-Layer (RFC 2132) */
+        c[0] = 0x01;
+        memcpy(c + 1, &hwaddr, ETH_ALEN);
+
+        free_and_replace(lease->client_id, c);
+        lease->client_id_size = ETH_ALEN + 1;
+
+        TAKE_PTR(lease);
+        return 0;
+}