| /* 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 "device-util.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; |
| int r; |
| uint8_t *v; |
| |
| assert(device); |
| |
| /* net_get_name() will return one of the device names based on stable information about the |
| * device. If this is not available, we fall back to using the device name. */ |
| name = net_get_name(device); |
| if (!name) |
| (void) sd_device_get_sysname(device, &name); |
| if (!name) |
| return log_device_debug_errno(device, SYNTHETIC_ERRNO(ENODATA), |
| "No stable identifying information found"); |
| |
| log_device_debug(device, "Using \"%s\" as stable identifying information", name); |
| 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, |
| const struct ether_addr *dev_mac, |
| const char *dev_path, |
| const char *dev_driver, |
| const char *dev_type, |
| const char *dev_name) { |
| |
| 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 **list = data, *c; |
| bool negate; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| if (isempty(rvalue)) { |
| *list = condition_free_list_type(*list, cond); |
| return 0; |
| } |
| |
| negate = rvalue[0] == '!'; |
| if (negate) |
| rvalue++; |
| |
| c = condition_new(cond, rvalue, false, negate); |
| if (!c) |
| return log_oom(); |
| |
| /* Drop previous assignment. */ |
| *list = condition_free_list_type(*list, cond); |
| |
| LIST_PREPEND(conditions, *list, 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(ðer_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, ðer_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; |
| } |
| |
| size_t serialize_in_addrs(FILE *f, |
| const struct in_addr *addresses, |
| size_t size, |
| bool with_leading_space, |
| bool (*predicate)(const struct in_addr *addr)) { |
| size_t count; |
| size_t i; |
| |
| assert(f); |
| assert(addresses); |
| |
| count = 0; |
| |
| for (i = 0; i < size; i++) { |
| char sbuf[INET_ADDRSTRLEN]; |
| |
| if (predicate && !predicate(&addresses[i])) |
| continue; |
| if (with_leading_space) |
| fputc(' ', f); |
| else |
| with_leading_space = true; |
| fputs(inet_ntop(AF_INET, &addresses[i], sbuf, sizeof(sbuf)), f); |
| count++; |
| } |
| |
| return count; |
| } |
| |
| 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 = size > 0 ? TAKE_PTR(addresses) : NULL; |
| |
| 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++) { |
| char sbuf[INET_ADDRSTRLEN]; |
| 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_ntop(AF_INET, &dest, sbuf, sizeof(sbuf)), length); |
| fprintf(f, ",%s%s", inet_ntop(AF_INET, &gw, sbuf, sizeof(sbuf)), (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; |
| } |