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networkd: Parse DNS search domain information for Router Advertisement

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Parse DNS search domains from .network files so that they are included
in Router Advertisement DNSSL options.

DNS search domains are added to the [IPv6PrefixDelegation] section using
the following syntax:

    Domains=foo.example.com bar.example.com

If IDNA libraries are enabled in systemd, international domain names
are supported.
This commit is contained in:
Patrik Flykt 2017-08-16 13:29:51 +03:00
parent 6d44591141
commit 700f1186e3
3 changed files with 53 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/network/networkd-network-gperf.gperf
View File

@ -152,6 +152,7 @@ IPv6PrefixDelegation.Managed, config_parse_bool,
IPv6PrefixDelegation.OtherInformation, config_parse_bool, 0, offsetof(Network, router_other_information)
IPv6PrefixDelegation.RouterPreference, config_parse_router_preference, 0, 0
IPv6PrefixDelegation.DNS, config_parse_radv_dns, 0, 0
IPv6PrefixDelegation.Domains, config_parse_radv_search_domains, 0, 0
IPv6PrefixDelegation.DNSLifetimeSec, config_parse_sec, 0, offsetof(Network, router_dns_lifetime_usec)
IPv6Prefix.Prefix, config_parse_prefix, 0, 0
IPv6Prefix.OnLink, config_parse_prefix_flags, 0, 0

50
src/network/networkd-network.c
View File

@ -35,6 +35,7 @@
#include "stat-util.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"
static void network_config_hash_func(const void *p, struct siphash *state) {
@ -1127,6 +1128,55 @@ int config_parse_radv_dns(
return 0;
}
int config_parse_radv_search_domains(
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) {
Network *n = data;
const char *p = rvalue;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
for (;;) {
_cleanup_free_ char *w = NULL;
_cleanup_free_ char *idna = NULL;
r = extract_first_word(&p, &w, NULL, 0);
if (r == -ENOMEM)
return log_oom();
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to extract word, ignoring: %s", rvalue);
return 0;
}
if (r == 0)
break;
r = dns_name_apply_idna(w, &idna);
if (r > 0) {
r = strv_push(&n->router_search_domains, idna);
if (r >= 0)
idna = NULL;
} else if (r == 0) {
r = strv_push(&n->router_search_domains, w);
if (r >= 0)
w = NULL;
}
}
return 0;
}
int config_parse_dhcp_server_ntp(
const char *unit,
const char *filename,

2
src/network/networkd-network.h
View File

@ -169,6 +169,7 @@ struct Network {
usec_t router_dns_lifetime_usec;
struct in6_addr *router_dns;
unsigned n_router_dns;
char **router_search_domains;
/* Bridge Support */
bool use_bpdu;
@ -275,6 +276,7 @@ int config_parse_hostname(const char *unit, const char *filename, unsigned line,
int config_parse_timezone(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_dhcp_server_dns(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_radv_dns(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_radv_search_domains(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_dhcp_server_ntp(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_dnssec_negative_trust_anchors(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_dhcp_use_domains(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);