| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright (C) 2013 Tom Gundersen <teg@jklm.no> |
| |
| 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 <netinet/ether.h> |
| #include <linux/if.h> |
| #include <arpa/inet.h> |
| #include <fnmatch.h> |
| |
| #include "strv.h" |
| #include "siphash24.h" |
| #include "libudev-private.h" |
| #include "network-internal.h" |
| #include "log.h" |
| #include "utf8.h" |
| #include "util.h" |
| #include "conf-parser.h" |
| #include "condition.h" |
| |
| #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(struct udev_device *device, uint8_t result[8]) { |
| size_t l, sz = 0; |
| const char *name = NULL, *field = NULL; |
| int r; |
| uint8_t *v; |
| |
| /* 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") { |
| name = udev_device_get_property_value(device, field); |
| if (name) |
| break; |
| } |
| |
| if (!name) |
| return -ENOENT; |
| |
| l = strlen(name); |
| sz = sizeof(sd_id128_t) + l; |
| v = alloca(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. */ |
| siphash24(result, v, sz, HASH_KEY.bytes); |
| |
| return 0; |
| } |
| |
| bool net_match_config(const struct ether_addr *match_mac, |
| const char *match_path, |
| const char *match_driver, |
| const char *match_type, |
| const char *match_name, |
| Condition *match_host, |
| Condition *match_virt, |
| Condition *match_kernel, |
| 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_host(match_host)) |
| return 0; |
| |
| if (match_virt && !condition_test_virtualization(match_virt)) |
| return 0; |
| |
| if (match_kernel && !condition_test_kernel_command_line(match_kernel)) |
| return 0; |
| |
| if (match_arch && !condition_test_architecture(match_arch)) |
| return 0; |
| |
| if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN))) |
| return 0; |
| |
| if (match_path && (!dev_path || fnmatch(match_path, dev_path, 0))) |
| return 0; |
| |
| if (match_driver) { |
| if (dev_parent_driver && !streq(match_driver, dev_parent_driver)) |
| return 0; |
| else if (!streq_ptr(match_driver, dev_driver)) |
| return 0; |
| } |
| |
| if (match_type && !streq_ptr(match_type, dev_type)) |
| return 0; |
| |
| if (match_name && (!dev_name || fnmatch(match_name, dev_name, 0))) |
| return 0; |
| |
| return 1; |
| } |
| |
| unsigned net_netmask_to_prefixlen(const struct in_addr *addr) { |
| assert(addr); |
| |
| return 32 - u32ctz(be32toh(addr->s_addr)); |
| } |
| |
| 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_ifname(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; |
| char *n; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| n = strdup(rvalue); |
| if (!n) |
| return log_oom(); |
| |
| if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) { |
| log_syntax(unit, LOG_ERR, filename, line, EINVAL, |
| "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue); |
| free(n); |
| return 0; |
| } |
| |
| free(*s); |
| if (*n) |
| *s = n; |
| else { |
| free(n); |
| *s = 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; |
| char *n; |
| |
| 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, EINVAL, |
| "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue); |
| free(n); |
| return 0; |
| } |
| |
| free(*s); |
| if (*n) |
| *s = n; |
| else { |
| free(n); |
| *s = NULL; |
| } |
| |
| 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) { |
| struct ether_addr **hwaddr = data; |
| struct ether_addr *n; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| n = new0(struct ether_addr, 1); |
| if (!n) |
| return log_oom(); |
| |
| r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", |
| &n->ether_addr_octet[0], |
| &n->ether_addr_octet[1], |
| &n->ether_addr_octet[2], |
| &n->ether_addr_octet[3], |
| &n->ether_addr_octet[4], |
| &n->ether_addr_octet[5]); |
| if (r != 6) { |
| log_syntax(unit, LOG_ERR, filename, line, EINVAL, |
| "Not a valid MAC address, ignoring assignment: %s", rvalue); |
| free(n); |
| return 0; |
| } |
| |
| free(*hwaddr); |
| *hwaddr = n; |
| |
| return 0; |
| } |
| |
| int net_parse_inaddr(const char *address, unsigned char *family, void *dst) { |
| int r; |
| |
| assert(address); |
| assert(family); |
| assert(dst); |
| |
| /* IPv4 */ |
| r = inet_pton(AF_INET, address, dst); |
| if (r > 0) { |
| /* succsefully parsed IPv4 address */ |
| if (*family == AF_UNSPEC) |
| *family = AF_INET; |
| else if (*family != AF_INET) |
| return -EINVAL; |
| } else if (r < 0) |
| return -errno; |
| else { |
| /* not an IPv4 address, so let's try IPv6 */ |
| r = inet_pton(AF_INET6, address, dst); |
| if (r > 0) { |
| /* successfully parsed IPv6 address */ |
| if (*family == AF_UNSPEC) |
| *family = AF_INET6; |
| else if (*family != AF_INET6) |
| return -EINVAL; |
| } else if (r < 0) |
| return -errno; |
| else |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| void serialize_in_addrs(FILE *f, const char *key, struct in_addr *addresses, size_t size) { |
| unsigned i; |
| |
| assert(f); |
| assert(key); |
| assert(addresses); |
| assert(size); |
| |
| fprintf(f, "%s=", key); |
| |
| for (i = 0; i < size; i++) |
| fprintf(f, "%s%s", inet_ntoa(addresses[i]), |
| (i < (size - 1)) ? " ": ""); |
| |
| fputs("\n", f); |
| } |
| |
| int deserialize_in_addrs(struct in_addr **ret, size_t *ret_size, const char *string) { |
| _cleanup_free_ struct in_addr *addresses = NULL; |
| size_t size = 0; |
| char *word, *state; |
| size_t len; |
| |
| assert(ret); |
| assert(ret_size); |
| assert(string); |
| |
| FOREACH_WORD(word, len, string, state) { |
| _cleanup_free_ char *addr_str = NULL; |
| struct in_addr *new_addresses; |
| int r; |
| |
| new_addresses = realloc(addresses, (size + 1) * sizeof(struct in_addr)); |
| if (!new_addresses) |
| return -ENOMEM; |
| else |
| addresses = new_addresses; |
| |
| addr_str = strndup(word, len); |
| if (!addr_str) |
| return -ENOMEM; |
| |
| r = inet_pton(AF_INET, addr_str, &(addresses[size])); |
| if (r <= 0) |
| continue; |
| |
| size ++; |
| } |
| |
| *ret_size = size; |
| *ret = addresses; |
| addresses = NULL; |
| |
| return 0; |
| } |
| |
| int deserialize_in6_addrs(struct in6_addr **ret, size_t *ret_size, const char *string) { |
| _cleanup_free_ struct in6_addr *addresses = NULL; |
| size_t size = 0; |
| char *word, *state; |
| size_t len; |
| |
| assert(ret); |
| assert(ret_size); |
| assert(string); |
| |
| FOREACH_WORD(word, len, string, state) { |
| _cleanup_free_ char *addr_str = NULL; |
| struct in6_addr *new_addresses; |
| int r; |
| |
| new_addresses = realloc(addresses, (size + 1) * sizeof(struct in6_addr)); |
| if (!new_addresses) |
| return -ENOMEM; |
| else |
| addresses = new_addresses; |
| |
| addr_str = strndup(word, len); |
| if (!addr_str) |
| return -ENOMEM; |
| |
| r = inet_pton(AF_INET6, addr_str, &(addresses[size])); |
| if (r <= 0) |
| continue; |
| |
| size++; |
| } |
| |
| *ret_size = size; |
| *ret = addresses; |
| addresses = NULL; |
| |
| return 0; |
| } |