add: print

src/print.c

@@ -1,7 +1,15 @@
 
 
+#include "interval.h"
+#include "setting.h"
+#include "statistics.h"
+#include <bits/types/struct_timeval.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <netinet/ip_icmp.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <sys/types.h>
 #include <unistd.h>
 
 void print_err(const char *format, ...)
@@ -13,4 +21,42 @@ void print_err(const char *format, ...)
     vdprintf(2, format, args);
     va_end(args);
     write(2, "\n", 1);
+}
+
+void print_header(const struct setting *settings)
+{
+    printf("PING %s (%s) %zu(%zu) bytes of data",
+        settings->dest.hostname,
+        settings->dest.ipstr,
+        settings->payload_size,
+        settings->payload_size + sizeof(struct icmphdr) + sizeof(struct iphdr)
+    );
+    if (settings->verbose)
+    {
+        unsigned short pid = getpid();
+        printf(", id 0x%x = %d", htons(getpid()), pid);
+    }
+    printf("\n");
+}
+
+void print_statistics(struct statistics const *stats, struct setting const *settings)
+{
+    printf("--- %s ping statistics ---\n", settings->dest.hostname);
+    printf("%zu packets transmitted, %zu packets received, %.3f%% packet loss\n",
+        stats->packets_sent,
+        stats->packets_received,
+        ((double) stats->packets_sent) * 100 / (double) stats->packets_received
+    );
+}
+
+void print_ping(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",
+        settings->payload_size + sizeof(struct icmphdr),
+        settings->dest.ipstr,
+        htons(header->un.echo.sequence),
+        settings->ttl,
+        get_interval(start, stop)
+    );
 }