Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : 
       3             : #include "condition.h"
       4             : #include "conf-parser.h"
       5             : #include "networkd-util.h"
       6             : #include "parse-util.h"
       7             : #include "string-table.h"
       8             : #include "string-util.h"
       9             : #include "util.h"
      10             : 
      11             : static const char * const address_family_table[_ADDRESS_FAMILY_MAX] = {
      12             :         [ADDRESS_FAMILY_NO]            = "no",
      13             :         [ADDRESS_FAMILY_YES]           = "yes",
      14             :         [ADDRESS_FAMILY_IPV4]          = "ipv4",
      15             :         [ADDRESS_FAMILY_IPV6]          = "ipv6",
      16             : };
      17             : 
      18             : static const char * const link_local_address_family_table[_ADDRESS_FAMILY_MAX] = {
      19             :         [ADDRESS_FAMILY_NO]            = "no",
      20             :         [ADDRESS_FAMILY_YES]           = "yes",
      21             :         [ADDRESS_FAMILY_IPV4]          = "ipv4",
      22             :         [ADDRESS_FAMILY_IPV6]          = "ipv6",
      23             :         [ADDRESS_FAMILY_FALLBACK]      = "fallback",
      24             :         [ADDRESS_FAMILY_FALLBACK_IPV4] = "ipv4-fallback",
      25             : };
      26             : 
      27             : static const char * const routing_policy_rule_address_family_table[_ADDRESS_FAMILY_MAX] = {
      28             :         [ADDRESS_FAMILY_YES]           = "both",
      29             :         [ADDRESS_FAMILY_IPV4]          = "ipv4",
      30             :         [ADDRESS_FAMILY_IPV6]          = "ipv6",
      31             : };
      32             : 
      33          19 : DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(address_family, AddressFamily, ADDRESS_FAMILY_YES);
      34           3 : DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(link_local_address_family, AddressFamily, ADDRESS_FAMILY_YES);
      35           0 : DEFINE_STRING_TABLE_LOOKUP(routing_policy_rule_address_family, AddressFamily);
      36           3 : DEFINE_CONFIG_PARSE_ENUM(config_parse_link_local_address_family, link_local_address_family,
      37             :                          AddressFamily, "Failed to parse option");
      38             : 
      39           0 : int config_parse_address_family_with_kernel(
      40             :                 const char* unit,
      41             :                 const char *filename,
      42             :                 unsigned line,
      43             :                 const char *section,
      44             :                 unsigned section_line,
      45             :                 const char *lvalue,
      46             :                 int ltype,
      47             :                 const char *rvalue,
      48             :                 void *data,
      49             :                 void *userdata) {
      50             : 
      51           0 :         AddressFamily *fwd = data, s;
      52             : 
      53           0 :         assert(filename);
      54           0 :         assert(lvalue);
      55           0 :         assert(rvalue);
      56           0 :         assert(data);
      57             : 
      58             :         /* This function is mostly obsolete now. It simply redirects
      59             :          * "kernel" to "no". In older networkd versions we used to
      60             :          * distinguish IPForward=off from IPForward=kernel, where the
      61             :          * former would explicitly turn off forwarding while the
      62             :          * latter would simply not touch the setting. But that logic
      63             :          * is gone, hence silently accept the old setting, but turn it
      64             :          * to "no". */
      65             : 
      66           0 :         s = address_family_from_string(rvalue);
      67           0 :         if (s < 0) {
      68           0 :                 if (streq(rvalue, "kernel"))
      69           0 :                         s = ADDRESS_FAMILY_NO;
      70             :                 else {
      71           0 :                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPForward= option, ignoring: %s", rvalue);
      72           0 :                         return 0;
      73             :                 }
      74             :         }
      75             : 
      76           0 :         *fwd = s;
      77             : 
      78           0 :         return 0;
      79             : }
      80             : 
      81             : /* Router lifetime can be set with netlink interface since kernel >= 4.5
      82             :  * so for the supported kernel we don't need to expire routes in userspace */
      83           0 : int kernel_route_expiration_supported(void) {
      84             :         static int cached = -1;
      85             :         int r;
      86             : 
      87           0 :         if (cached < 0) {
      88           0 :                 Condition c = {
      89             :                         .type = CONDITION_KERNEL_VERSION,
      90             :                         .parameter = (char *) ">= 4.5"
      91             :                 };
      92           0 :                 r = condition_test(&c);
      93           0 :                 if (r < 0)
      94           0 :                         return r;
      95             : 
      96           0 :                 cached = r;
      97             :         }
      98           0 :         return cached;
      99             : }
     100             : 
     101          46 : static void network_config_hash_func(const NetworkConfigSection *c, struct siphash *state) {
     102          46 :         siphash24_compress(c->filename, strlen(c->filename), state);
     103          46 :         siphash24_compress(&c->line, sizeof(c->line), state);
     104          46 : }
     105             : 
     106          23 : static int network_config_compare_func(const NetworkConfigSection *x, const NetworkConfigSection *y) {
     107             :         int r;
     108             : 
     109          23 :         r = strcmp(x->filename, y->filename);
     110          23 :         if (r != 0)
     111           0 :                 return r;
     112             : 
     113          23 :         return CMP(x->line, y->line);
     114             : }
     115             : 
     116             : DEFINE_HASH_OPS(network_config_hash_ops, NetworkConfigSection, network_config_hash_func, network_config_compare_func);
     117             : 
     118          23 : int network_config_section_new(const char *filename, unsigned line, NetworkConfigSection **s) {
     119             :         NetworkConfigSection *cs;
     120             : 
     121          23 :         cs = malloc0(offsetof(NetworkConfigSection, filename) + strlen(filename) + 1);
     122          23 :         if (!cs)
     123           0 :                 return -ENOMEM;
     124             : 
     125          23 :         strcpy(cs->filename, filename);
     126          23 :         cs->line = line;
     127             : 
     128          23 :         *s = TAKE_PTR(cs);
     129             : 
     130          23 :         return 0;
     131             : }
     132             : 
     133          34 : void network_config_section_free(NetworkConfigSection *cs) {
     134          34 :         free(cs);
     135          34 : }