diff options
| -rw-r--r-- | conf.c | 73 |
1 files changed, 41 insertions, 32 deletions
@@ -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; } |