mirror of
https://github.com/systemd/systemd.git
synced 2026-07-12 10:34:12 +00:00
3ad0c5d8a4
The actual code rename will follow. The reason for the change of name is to make it simpler and more uniform with how we name other libraries (we don't include the underlying protocol). The new name also matches the naming in the kernel (which is particularly relevent here as we expect to let the kernel do some parts of the protocol and we do others).
550 lines
16 KiB
C
550 lines
16 KiB
C
/*-*- 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 "strv.h"
|
|
#include "siphash24.h"
|
|
#include "dhcp-lease-internal.h"
|
|
#include "log.h"
|
|
#include "utf8.h"
|
|
#include "util.h"
|
|
#include "conf-parser.h"
|
|
#include "condition.h"
|
|
#include "network-internal.h"
|
|
#include "sd-ndisc.h"
|
|
|
|
const char *net_get_name(struct udev_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") {
|
|
name = udev_device_get_property_value(device, field);
|
|
if (name)
|
|
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(struct udev_device *device, uint8_t result[8]) {
|
|
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 = 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,
|
|
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,
|
|
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))
|
|
return false;
|
|
|
|
if (match_virt && !condition_test(match_virt))
|
|
return false;
|
|
|
|
if (match_kernel && !condition_test(match_kernel))
|
|
return false;
|
|
|
|
if (match_arch && !condition_test(match_arch))
|
|
return false;
|
|
|
|
if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN)))
|
|
return false;
|
|
|
|
if (!strv_isempty(match_paths) &&
|
|
(!dev_path || !strv_fnmatch(match_paths, dev_path, 0)))
|
|
return false;
|
|
|
|
if (!strv_isempty(match_drivers) &&
|
|
(!dev_driver || !strv_fnmatch(match_drivers, dev_driver, 0)))
|
|
return false;
|
|
|
|
if (!strv_isempty(match_types) &&
|
|
(!dev_type || !strv_fnmatch_or_empty(match_types, dev_type, 0)))
|
|
return false;
|
|
|
|
if (!strv_isempty(match_names) &&
|
|
(!dev_name || !strv_fnmatch_or_empty(match_names, dev_name, 0)))
|
|
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_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;
|
|
_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) >= IFNAMSIZ) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
free(*s);
|
|
if (*n) {
|
|
*s = n;
|
|
n = NULL;
|
|
} else
|
|
*s = NULL;
|
|
|
|
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;
|
|
const char *word, *state;
|
|
size_t l;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
FOREACH_WORD(word, l, rvalue, state) {
|
|
char *n;
|
|
|
|
n = strndup(word, l);
|
|
if (!n)
|
|
return log_oom();
|
|
|
|
if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
|
|
free(n);
|
|
return 0;
|
|
}
|
|
|
|
r = strv_consume(sv, n);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
free(*s);
|
|
if (*n) {
|
|
*s = n;
|
|
n = NULL;
|
|
} else
|
|
*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, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue);
|
|
free(n);
|
|
return 0;
|
|
}
|
|
|
|
free(*hwaddr);
|
|
*hwaddr = n;
|
|
|
|
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;
|
|
const char *word, *state;
|
|
size_t len;
|
|
|
|
assert(ret);
|
|
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 = addresses;
|
|
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++)
|
|
fprintf(f, SD_ICMP6_ND_ADDRESS_FORMAT_STR"%s",
|
|
SD_ICMP6_ND_ADDRESS_FORMAT_VAL(addresses[i]),
|
|
(i < (size - 1)) ? " ": "");
|
|
}
|
|
|
|
int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
|
|
_cleanup_free_ struct in6_addr *addresses = NULL;
|
|
int size = 0;
|
|
const char *word, *state;
|
|
size_t len;
|
|
|
|
assert(ret);
|
|
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 = addresses;
|
|
addresses = NULL;
|
|
|
|
return size;
|
|
}
|
|
|
|
void serialize_dhcp_routes(FILE *f, const char *key, struct 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++) {
|
|
fprintf(f, "%s/%" PRIu8, inet_ntoa(routes[i].dst_addr),
|
|
routes[i].dst_prefixlen);
|
|
fprintf(f, ",%s%s", inet_ntoa(routes[i].gw_addr),
|
|
(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;
|
|
const char *word, *state;
|
|
size_t len;
|
|
|
|
assert(ret);
|
|
assert(ret_size);
|
|
assert(ret_allocated);
|
|
assert(string);
|
|
|
|
FOREACH_WORD(word, len, string, state) {
|
|
/* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
|
|
_cleanup_free_ char* entry = NULL;
|
|
char *tok, *tok_end;
|
|
unsigned n;
|
|
int r;
|
|
|
|
if (!GREEDY_REALLOC(routes, allocated, size + 1))
|
|
return -ENOMEM;
|
|
|
|
entry = strndup(word, len);
|
|
if(!entry)
|
|
return -ENOMEM;
|
|
|
|
tok = entry;
|
|
|
|
/* 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 = routes;
|
|
routes = NULL;
|
|
|
|
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;
|
|
}
|
|
|
|
int deserialize_dhcp_option(void **data, size_t *data_len, const char *string) {
|
|
assert(data);
|
|
assert(data_len);
|
|
assert(string);
|
|
|
|
if (strlen(string) % 2)
|
|
return -EINVAL;
|
|
|
|
return unhexmem(string, strlen(string), (void **)data, data_len);
|
|
}
|