aboutgitcodebugslistschat
diff options
context:
space:
mode:
-rw-r--r--conf.c73
1 files changed, 41 insertions, 32 deletions
diff --git a/conf.c b/conf.c
index 9b05afe..2a52bc3 100644
--- a/conf.c
+++ b/conf.c
@@ -354,54 +354,65 @@ bind_all_fail:
* add_dns4() - Possibly add the IPv4 address of a DNS resolver to configuration
* @c: Execution context
* @addr: Address found in /etc/resolv.conf
- * @conf: Pointer to reference of current entry in array of IPv4 resolvers
+ * @idx: Index of free entry in array of IPv4 resolvers
+ *
+ * Return: Number of entries added (0 or 1)
*/
-static void add_dns4(struct ctx *c, const struct in_addr *addr,
- struct in_addr **conf)
+static unsigned add_dns4(struct ctx *c, const struct in_addr *addr,
+ unsigned idx)
{
+ unsigned added = 0;
+
/* Guest or container can only access local addresses via redirect */
if (IN4_IS_ADDR_LOOPBACK(addr)) {
if (!c->no_map_gw) {
- **conf = c->ip4.gw;
- (*conf)++;
+ c->ip4.dns[idx] = c->ip4.gw;
+ added++;
if (IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns_match))
c->ip4.dns_match = c->ip4.gw;
}
} else {
- **conf = *addr;
- (*conf)++;
+ c->ip4.dns[idx] = *addr;
+ added++;
}
if (IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns_host))
c->ip4.dns_host = *addr;
+
+ return added;
}
/**
* add_dns6() - Possibly add the IPv6 address of a DNS resolver to configuration
* @c: Execution context
* @addr: Address found in /etc/resolv.conf
- * @conf: Pointer to reference of current entry in array of IPv6 resolvers
+ * @idx: Index of free entry in array of IPv6 resolvers
+ *
+ * Return: Number of entries added (0 or 1)
*/
-static void add_dns6(struct ctx *c,
- struct in6_addr *addr, struct in6_addr **conf)
+static unsigned add_dns6(struct ctx *c, struct in6_addr *addr, unsigned idx)
{
+ unsigned added = 0;
+
/* Guest or container can only access local addresses via redirect */
if (IN6_IS_ADDR_LOOPBACK(addr)) {
if (!c->no_map_gw) {
- **conf = c->ip6.gw;
- (*conf)++;
+ c->ip6.dns[idx] = c->ip6.gw;
+ added++;
if (IN6_IS_ADDR_UNSPECIFIED(&c->ip6.dns_match))
c->ip6.dns_match = *addr;
}
} else {
- **conf = *addr;
- (*conf)++;
+ c->ip6.dns[idx] = *addr;
+ added++;
}
if (IN6_IS_ADDR_UNSPECIFIED(&c->ip6.dns_host))
c->ip6.dns_host = *addr;
+
+ return added;
}
/**
@@ -410,18 +421,19 @@ static void add_dns6(struct ctx *c,
*/
static void get_dns(struct ctx *c)
{
- struct in6_addr *dns6 = &c->ip6.dns[0], dns6_tmp;
- struct in_addr *dns4 = &c->ip4.dns[0], dns4_tmp;
int dns4_set, dns6_set, dnss_set, dns_set, fd;
+ unsigned dns4_idx = 0, dns6_idx = 0;
struct fqdn *s = c->dns_search;
struct lineread resolvconf;
+ struct in6_addr dns6_tmp;
+ struct in_addr dns4_tmp;
unsigned int added = 0;
ssize_t line_len;
char *line, *end;
const char *p;
- dns4_set = !c->ifi4 || !IN4_IS_ADDR_UNSPECIFIED(dns4);
- dns6_set = !c->ifi6 || !IN6_IS_ADDR_UNSPECIFIED(dns6);
+ dns4_set = !c->ifi4 || !IN4_IS_ADDR_UNSPECIFIED(&c->ip4.dns[0]);
+ dns6_set = !c->ifi6 || !IN6_IS_ADDR_UNSPECIFIED(&c->ip6.dns[0]);
dnss_set = !!*s->n || c->no_dns_search;
dns_set = (dns4_set && dns6_set) || c->no_dns;
@@ -442,17 +454,15 @@ static void get_dns(struct ctx *c)
if (end)
*end = 0;
- if (!dns4_set &&
- dns4 - &c->ip4.dns[0] < ARRAY_SIZE(c->ip4.dns) - 1
+ if (!dns4_set && dns4_idx < ARRAY_SIZE(c->ip4.dns) - 1
&& inet_pton(AF_INET, p + 1, &dns4_tmp)) {
- add_dns4(c, &dns4_tmp, &dns4);
+ dns4_idx += add_dns4(c, &dns4_tmp, dns4_idx);
added++;
}
- if (!dns6_set &&
- dns6 - &c->ip6.dns[0] < ARRAY_SIZE(c->ip6.dns) - 1
+ if (!dns6_set && dns6_idx < ARRAY_SIZE(c->ip6.dns) - 1
&& inet_pton(AF_INET6, p + 1, &dns6_tmp)) {
- add_dns6(c, &dns6_tmp, &dns6);
+ dns6_idx += add_dns6(c, &dns6_tmp, dns6_idx);
added++;
}
} else if (!dnss_set && strstr(line, "search ") == line &&
@@ -1236,8 +1246,7 @@ void conf(struct ctx *c, int argc, char **argv)
bool copy_addrs_opt = false, copy_routes_opt = false;
enum fwd_ports_mode fwd_default = FWD_NONE;
bool v4_only = false, v6_only = false;
- struct in6_addr *dns6 = c->ip6.dns;
- struct in_addr *dns4 = c->ip4.dns;
+ unsigned dns4_idx = 0, dns6_idx = 0;
struct fqdn *dnss = c->dns_search;
unsigned int ifi4 = 0, ifi6 = 0;
const char *logfile = NULL;
@@ -1662,13 +1671,13 @@ void conf(struct ctx *c, int argc, char **argv)
if (!strcmp(optarg, "none")) {
c->no_dns = 1;
- dns4 = &c->ip4.dns[0];
+ dns4_idx = 0;
memset(c->ip4.dns, 0, sizeof(c->ip4.dns));
c->ip4.dns[0] = (struct in_addr){ 0 };
c->ip4.dns_match = (struct in_addr){ 0 };
c->ip4.dns_host = (struct in_addr){ 0 };
- dns6 = &c->ip6.dns[0];
+ dns6_idx = 0;
memset(c->ip6.dns, 0, sizeof(c->ip6.dns));
c->ip6.dns_match = (struct in6_addr){ 0 };
c->ip6.dns_host = (struct in6_addr){ 0 };
@@ -1678,15 +1687,15 @@ void conf(struct ctx *c, int argc, char **argv)
c->no_dns = 0;
- if (dns4 - &c->ip4.dns[0] < ARRAY_SIZE(c->ip4.dns) &&
+ if (dns4_idx < ARRAY_SIZE(c->ip4.dns) &&
inet_pton(AF_INET, optarg, &dns4_tmp)) {
- add_dns4(c, &dns4_tmp, &dns4);
+ dns4_idx += add_dns4(c, &dns4_tmp, dns4_idx);
continue;
}
- if (dns6 - &c->ip6.dns[0] < ARRAY_SIZE(c->ip6.dns) &&
+ if (dns6_idx < ARRAY_SIZE(c->ip6.dns) &&
inet_pton(AF_INET6, optarg, &dns6_tmp)) {
- add_dns6(c, &dns6_tmp, &dns6);
+ dns6_idx += add_dns6(c, &dns6_tmp, dns6_idx);
continue;
}