diff options
Diffstat (limited to 'net/dns.c')
| -rw-r--r-- | net/dns.c | 36 |
1 files changed, 22 insertions, 14 deletions
@@ -201,26 +201,27 @@ static void dns_handler(void *ctx, char *packet, unsigned len) net_eth_to_udplen(packet)); } -IPaddr_t resolv(const char *host) +int resolv(const char *host, IPaddr_t *ip) { - IPaddr_t ip; + IPaddr_t nameserver; - if (!string_to_ip(host, &ip)) - return ip; + if (!string_to_ip(host, ip)) + return 0; dns_ip = 0; + *ip = 0; dns_state = STATE_INIT; - ip = net_get_nameserver(); - if (!ip) { + nameserver = net_get_nameserver(); + if (!nameserver) { pr_err("no nameserver specified in $net.nameserver\n"); return 0; } - pr_debug("resolving host %s via nameserver %pI4\n", host, &ip); + pr_debug("resolving host %s via nameserver %pI4\n", host, &nameserver); - dns_con = net_udp_new(ip, DNS_PORT, dns_handler, NULL); + dns_con = net_udp_new(nameserver, DNS_PORT, dns_handler, NULL); if (IS_ERR(dns_con)) return PTR_ERR(dns_con); dns_timer_start = get_time_ns(); @@ -240,25 +241,32 @@ IPaddr_t resolv(const char *host) net_unregister(dns_con); - pr_debug("host %s is at %pI4\n", host, &dns_ip); + if (dns_ip) { + pr_debug("host %s is at %pI4\n", host, &dns_ip); + } else { + pr_debug("host %s not found\n", host); + return -ENOENT; + } + + *ip = dns_ip; - return dns_ip; + return 0; } #ifdef CONFIG_CMD_HOST static int do_host(int argc, char *argv[]) { IPaddr_t ip; + int ret; if (argc != 2) return COMMAND_ERROR_USAGE; - ip = resolv(argv[1]); - if (!ip) + ret = resolv(argv[1], &ip); + if (ret) printf("unknown host %s\n", argv[1]); - else { + else printf("%s is at %pI4\n", argv[1], &ip); - } return 0; } |