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authorTom Gundersen <teg@jklm.no>2014-03-21 21:38:14 +0100
committerTom Gundersen <teg@jklm.no>2014-03-21 21:54:37 +0100
commitc6f7c917a1b494d4455800823472227463f87438 (patch)
tree9264e6f450575faad26deec8da0a0c6e630f5740 /src/libsystemd-network
parentb5db00e52ee2e20578839e4e4488f7b9af9abc38 (diff)
libsystemd-network: move network-utils from src/shared
This does not belong in shared as it is mostly a detail of our networking subsystem. Moreover, now we can use libudev here, which will simplify things.
Diffstat (limited to 'src/libsystemd-network')
-rw-r--r--src/libsystemd-network/network-internal.c328
-rw-r--r--src/libsystemd-network/network-internal.h67
2 files changed, 395 insertions, 0 deletions
diff --git a/src/libsystemd-network/network-internal.c b/src/libsystemd-network/network-internal.c
new file mode 100644
index 0000000000..eed0fda92d
--- /dev/null
+++ b/src/libsystemd-network/network-internal.c
@@ -0,0 +1,328 @@
+/*-*- 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, *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 char *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, ether_aton(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;
+}
diff --git a/src/libsystemd-network/network-internal.h b/src/libsystemd-network/network-internal.h
new file mode 100644
index 0000000000..65cd0d72a0
--- /dev/null
+++ b/src/libsystemd-network/network-internal.h
@@ -0,0 +1,67 @@
+/*-*- 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/>.
+***/
+
+#pragma once
+
+#include <netinet/ether.h>
+#include <netinet/in.h>
+#include <stdbool.h>
+
+#include "udev.h"
+#include "condition-util.h"
+
+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 char *dev_mac,
+ const char *dev_path,
+ const char *dev_parent_driver,
+ const char *dev_driver,
+ const char *dev_type,
+ const char *dev_name);
+
+unsigned net_netmask_to_prefixlen(const struct in_addr *netmask);
+
+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);
+
+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);
+
+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);
+
+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);
+
+int net_parse_inaddr(const char *address, unsigned char *family, void *dst);
+
+int net_get_unique_predictable_data(struct udev_device *device, uint8_t result[8]);