clean: remove dns lookup

src/dns.c

@@ -30,21 +30,5 @@ int dns_lookup(struct hostenv *host)
 
     freeaddrinfo(responses);
 
-    return 0;
-}
-
-int dns_reverse_lookup(struct hostenv *host)
-{
-    int ret = getnameinfo(
-        (struct sockaddr *)&host->ip, sizeof(host->ip),
-        host->reverse_dns, sizeof(host->reverse_dns),
-        NULL, 0, NI_NAMEREQD);
-
-    if (ret != 0) 
-    {
-        print_err("reverse dns failed.");
-        return 1;
-    }
-
     return 0;
 }

src/dns.h

@@ -2,5 +2,4 @@
 
 #include "host.h"
 
-int dns_lookup(struct hostenv *host);
+int dns_lookup(struct hostenv *host);
-int dns_reverse_lookup(struct hostenv *host);

src/host.h

@@ -7,5 +7,4 @@ struct hostenv {
     char ipstr[INET_ADDRSTRLEN];
     struct sockaddr_in ip;
     char *hostname;
-    char reverse_dns[NI_MAXHOST];
 };

src/print.c

@@ -49,7 +49,7 @@ void print_statistics(struct statistics const *stats, struct setting const *sett
     );
 }
 
-void print_ping(const struct setting *settings, const struct icmphdr *header, const struct timeval *start, const struct timeval *stop)
+void print_recv(const struct setting *settings, const struct icmphdr *header, const struct timeval *start, const struct timeval *stop)
 {
 
     printf("%zu bytes from %s: icmp_seq=%d ttl=%zu time=%.3f ms\n",

src/print.h

@@ -9,4 +9,4 @@ void print_err(const char *format, ...);
 
 void print_header(struct setting const *settings);
 void print_statistics(struct statistics const *stats, struct setting const *settings);
-void print_ping(struct setting const *settings, struct icmphdr const *header, struct timeval const *start, struct timeval const *stop);
+void print_recv(struct setting const *settings, struct icmphdr const *header, struct timeval const *start, struct timeval const *stop);