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-rw-r--r--src/libsystemd-network/network-internal.c620
1 files changed, 620 insertions, 0 deletions
diff --git a/src/libsystemd-network/network-internal.c b/src/libsystemd-network/network-internal.c
new file mode 100644
index 0000000..0348e7f
--- /dev/null
+++ b/src/libsystemd-network/network-internal.c
@@ -0,0 +1,620 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <arpa/inet.h>
+#include <linux/if.h>
+#include <netinet/ether.h>
+
+#include "sd-id128.h"
+#include "sd-ndisc.h"
+
+#include "alloc-util.h"
+#include "condition.h"
+#include "conf-parser.h"
+#include "dhcp-lease-internal.h"
+#include "ether-addr-util.h"
+#include "hexdecoct.h"
+#include "log.h"
+#include "network-internal.h"
+#include "parse-util.h"
+#include "siphash24.h"
+#include "socket-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "utf8.h"
+#include "util.h"
+
+const char *net_get_name(sd_device *device) {
+ const char *name, *field;
+
+ assert(device);
+
+ /* fetch some persistent data unique (on this machine) to this device */
+ FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC")
+ if (sd_device_get_property_value(device, field, &name) >= 0)
+ return name;
+
+ return NULL;
+}
+
+#define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a)
+
+int net_get_unique_predictable_data(sd_device *device, uint64_t *result) {
+ size_t l, sz = 0;
+ const char *name = NULL;
+ int r;
+ uint8_t *v;
+
+ assert(device);
+
+ name = net_get_name(device);
+ if (!name)
+ return -ENOENT;
+
+ l = strlen(name);
+ sz = sizeof(sd_id128_t) + l;
+ v = newa(uint8_t, sz);
+
+ /* fetch some persistent data unique to this machine */
+ r = sd_id128_get_machine((sd_id128_t*) v);
+ if (r < 0)
+ return r;
+ memcpy(v + sizeof(sd_id128_t), name, l);
+
+ /* Let's hash the machine ID plus the device name. We
+ * use a fixed, but originally randomly created hash
+ * key here. */
+ *result = htole64(siphash24(v, sz, HASH_KEY.bytes));
+
+ return 0;
+}
+
+static bool net_condition_test_strv(char * const *raw_patterns,
+ const char *string) {
+ if (strv_isempty(raw_patterns))
+ return true;
+
+ /* If the patterns begin with "!", edit it out and negate the test. */
+ if (raw_patterns[0][0] == '!') {
+ char **patterns;
+ size_t i, length;
+
+ length = strv_length(raw_patterns) + 1; /* Include the NULL. */
+ patterns = newa(char*, length);
+ patterns[0] = raw_patterns[0] + 1; /* Skip the "!". */
+ for (i = 1; i < length; i++)
+ patterns[i] = raw_patterns[i];
+
+ return !string || !strv_fnmatch(patterns, string, 0);
+ }
+
+ return string && strv_fnmatch(raw_patterns, string, 0);
+}
+
+bool net_match_config(Set *match_mac,
+ char * const *match_paths,
+ char * const *match_drivers,
+ char * const *match_types,
+ char * const *match_names,
+ Condition *match_host,
+ Condition *match_virt,
+ Condition *match_kernel_cmdline,
+ Condition *match_kernel_version,
+ Condition *match_arch,
+ const struct ether_addr *dev_mac,
+ const char *dev_path,
+ const char *dev_parent_driver,
+ const char *dev_driver,
+ const char *dev_type,
+ const char *dev_name) {
+
+ if (match_host && condition_test(match_host) <= 0)
+ return false;
+
+ if (match_virt && condition_test(match_virt) <= 0)
+ return false;
+
+ if (match_kernel_cmdline && condition_test(match_kernel_cmdline) <= 0)
+ return false;
+
+ if (match_kernel_version && condition_test(match_kernel_version) <= 0)
+ return false;
+
+ if (match_arch && condition_test(match_arch) <= 0)
+ return false;
+
+ if (match_mac && (!dev_mac || !set_contains(match_mac, dev_mac)))
+ return false;
+
+ if (!net_condition_test_strv(match_paths, dev_path))
+ return false;
+
+ if (!net_condition_test_strv(match_drivers, dev_driver))
+ return false;
+
+ if (!net_condition_test_strv(match_types, dev_type))
+ return false;
+
+ if (!net_condition_test_strv(match_names, dev_name))
+ return false;
+
+ return true;
+}
+
+int config_parse_net_condition(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) {
+
+ ConditionType cond = ltype;
+ Condition **ret = data;
+ bool negate;
+ Condition *c;
+ _cleanup_free_ char *s = NULL;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ negate = rvalue[0] == '!';
+ if (negate)
+ rvalue++;
+
+ s = strdup(rvalue);
+ if (!s)
+ return log_oom();
+
+ c = condition_new(cond, s, false, negate);
+ if (!c)
+ return log_oom();
+
+ if (*ret)
+ condition_free(*ret);
+
+ *ret = c;
+ return 0;
+}
+
+int config_parse_ifnames(
+ 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) {
+
+ char ***sv = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+
+ r = extract_first_word(&rvalue, &word, NULL, 0);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse interface name list: %s", rvalue);
+ return 0;
+ }
+ if (r == 0)
+ break;
+
+ if (!ifname_valid(word)) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ r = strv_push(sv, word);
+ if (r < 0)
+ return log_oom();
+
+ word = NULL;
+ }
+
+ return 0;
+}
+
+int config_parse_ifalias(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) {
+
+ char **s = data;
+ _cleanup_free_ char *n = NULL;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ n = strdup(rvalue);
+ if (!n)
+ return log_oom();
+
+ if (!ascii_is_valid(n) || strlen(n) >= IFALIASZ) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ if (isempty(n))
+ *s = mfree(*s);
+ else
+ free_and_replace(*s, n);
+
+ return 0;
+}
+
+int config_parse_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_free_ struct ether_addr *n = NULL;
+ struct ether_addr **hwaddr = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ n = new0(struct ether_addr, 1);
+ if (!n)
+ return log_oom();
+
+ r = ether_addr_from_string(rvalue, n);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Not a valid MAC address, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ free_and_replace(*hwaddr, n);
+
+ return 0;
+}
+
+int config_parse_hwaddrs(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_set_free_free_ Set *s = NULL;
+ const char *p = rvalue;
+ Set **hwaddrs = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (isempty(rvalue)) {
+ /* Empty assignment resets the list */
+ *hwaddrs = set_free_free(*hwaddrs);
+ return 0;
+ }
+
+ s = set_new(&ether_addr_hash_ops);
+ if (!s)
+ return log_oom();
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ _cleanup_free_ struct ether_addr *n = NULL;
+
+ r = extract_first_word(&p, &word, NULL, 0);
+ if (r == 0)
+ break;
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ n = new(struct ether_addr, 1);
+ if (!n)
+ return log_oom();
+
+ r = ether_addr_from_string(word, n);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring: %s", word);
+ continue;
+ }
+
+ r = set_put(s, n);
+ if (r < 0)
+ return log_oom();
+ if (r > 0)
+ n = NULL; /* avoid cleanup */
+ }
+
+ r = set_ensure_allocated(hwaddrs, &ether_addr_hash_ops);
+ if (r < 0)
+ return log_oom();
+
+ r = set_move(*hwaddrs, s);
+ if (r < 0)
+ return log_oom();
+
+ return 0;
+}
+
+int config_parse_bridge_port_priority(
+ 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) {
+
+ uint16_t i;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = safe_atou16(rvalue, &i);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse bridge port priority, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (i > LINK_BRIDGE_PORT_PRIORITY_MAX) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Bridge port priority is larger than maximum %u, ignoring: %s", LINK_BRIDGE_PORT_PRIORITY_MAX, rvalue);
+ return 0;
+ }
+
+ *((uint16_t *)data) = i;
+
+ return 0;
+}
+
+void serialize_in_addrs(FILE *f, const struct in_addr *addresses, size_t size) {
+ unsigned i;
+
+ assert(f);
+ assert(addresses);
+ assert(size);
+
+ for (i = 0; i < size; i++)
+ fprintf(f, "%s%s", inet_ntoa(addresses[i]),
+ (i < (size - 1)) ? " ": "");
+}
+
+int deserialize_in_addrs(struct in_addr **ret, const char *string) {
+ _cleanup_free_ struct in_addr *addresses = NULL;
+ int size = 0;
+
+ assert(ret);
+ assert(string);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ struct in_addr *new_addresses;
+ int r;
+
+ r = extract_first_word(&string, &word, NULL, 0);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ new_addresses = reallocarray(addresses, size + 1, sizeof(struct in_addr));
+ if (!new_addresses)
+ return -ENOMEM;
+ else
+ addresses = new_addresses;
+
+ r = inet_pton(AF_INET, word, &(addresses[size]));
+ if (r <= 0)
+ continue;
+
+ size++;
+ }
+
+ *ret = TAKE_PTR(addresses);
+
+ return size;
+}
+
+void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses, size_t size) {
+ unsigned i;
+
+ assert(f);
+ assert(addresses);
+ assert(size);
+
+ for (i = 0; i < size; i++) {
+ char buffer[INET6_ADDRSTRLEN];
+
+ fputs(inet_ntop(AF_INET6, addresses+i, buffer, sizeof(buffer)), f);
+
+ if (i < size - 1)
+ fputc(' ', f);
+ }
+}
+
+int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
+ _cleanup_free_ struct in6_addr *addresses = NULL;
+ int size = 0;
+
+ assert(ret);
+ assert(string);
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ struct in6_addr *new_addresses;
+ int r;
+
+ r = extract_first_word(&string, &word, NULL, 0);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ new_addresses = reallocarray(addresses, size + 1, sizeof(struct in6_addr));
+ if (!new_addresses)
+ return -ENOMEM;
+ else
+ addresses = new_addresses;
+
+ r = inet_pton(AF_INET6, word, &(addresses[size]));
+ if (r <= 0)
+ continue;
+
+ size++;
+ }
+
+ *ret = TAKE_PTR(addresses);
+
+ return size;
+}
+
+void serialize_dhcp_routes(FILE *f, const char *key, sd_dhcp_route **routes, size_t size) {
+ unsigned i;
+
+ assert(f);
+ assert(key);
+ assert(routes);
+ assert(size);
+
+ fprintf(f, "%s=", key);
+
+ for (i = 0; i < size; i++) {
+ struct in_addr dest, gw;
+ uint8_t length;
+
+ assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0);
+ assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0);
+ assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0);
+
+ fprintf(f, "%s/%" PRIu8, inet_ntoa(dest), length);
+ fprintf(f, ",%s%s", inet_ntoa(gw), (i < (size - 1)) ? " ": "");
+ }
+
+ fputs("\n", f);
+}
+
+int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) {
+ _cleanup_free_ struct sd_dhcp_route *routes = NULL;
+ size_t size = 0, allocated = 0;
+
+ assert(ret);
+ assert(ret_size);
+ assert(ret_allocated);
+ assert(string);
+
+ /* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ char *tok, *tok_end;
+ unsigned n;
+ int r;
+
+ r = extract_first_word(&string, &word, NULL, 0);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ if (!GREEDY_REALLOC(routes, allocated, size + 1))
+ return -ENOMEM;
+
+ tok = word;
+
+ /* get the subnet */
+ tok_end = strchr(tok, '/');
+ if (!tok_end)
+ continue;
+ *tok_end = '\0';
+
+ r = inet_aton(tok, &routes[size].dst_addr);
+ if (r == 0)
+ continue;
+
+ tok = tok_end + 1;
+
+ /* get the prefixlen */
+ tok_end = strchr(tok, ',');
+ if (!tok_end)
+ continue;
+
+ *tok_end = '\0';
+
+ r = safe_atou(tok, &n);
+ if (r < 0 || n > 32)
+ continue;
+
+ routes[size].dst_prefixlen = (uint8_t) n;
+ tok = tok_end + 1;
+
+ /* get the gateway */
+ r = inet_aton(tok, &routes[size].gw_addr);
+ if (r == 0)
+ continue;
+
+ size++;
+ }
+
+ *ret_size = size;
+ *ret_allocated = allocated;
+ *ret = TAKE_PTR(routes);
+
+ return 0;
+}
+
+int serialize_dhcp_option(FILE *f, const char *key, const void *data, size_t size) {
+ _cleanup_free_ char *hex_buf = NULL;
+
+ assert(f);
+ assert(key);
+ assert(data);
+
+ hex_buf = hexmem(data, size);
+ if (hex_buf == NULL)
+ return -ENOMEM;
+
+ fprintf(f, "%s=%s\n", key, hex_buf);
+
+ return 0;
+}
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