From 9fe033ea88c2f705ec18c232873d056e0c229d72 Mon Sep 17 00:00:00 2001
From: Gaspard Coulet <gaspard.coulet@mines-ales.org>
Date: Wed, 28 Apr 2021 23:05:53 +0200
Subject: Initial commit

---
 sem_6/HLIN611/tp1.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 sem_6/HLIN611/tp1.c

(limited to 'sem_6/HLIN611/tp1.c')

diff --git a/sem_6/HLIN611/tp1.c b/sem_6/HLIN611/tp1.c
new file mode 100644
index 0000000..7ff5a2b
--- /dev/null
+++ b/sem_6/HLIN611/tp1.c
@@ -0,0 +1,72 @@
+#include<stdlib.h>
+#include<stdio.h>
+#include<sys/socket.h>
+#include<netdb.h>
+#include<sys/types.h>
+#include<string.h>
+#include<arpa/inet.h>
+#include <errno.h>
+
+int main (int argc, char ** argv){
+  if (argc != 2){
+    printf("Syntaxe : %s nom\n",argv[0]);
+    return 1;
+  }
+  struct addrinfo hints;
+  struct addrinfo *result, *rp;
+  int s;
+  char addrstr[64];
+  char ip[64];
+  char canonname[256];
+  memset(&canonname, 0, 256*sizeof(char));
+  memset(&ip, 0, 64*sizeof(char));
+  memset(&addrstr,0,64*sizeof(char) );
+  hints.ai_family=AF_UNSPEC;
+  hints.ai_socktype=0;
+  hints.ai_flags = AI_CANONNAME;
+  struct addrinfo * p ;
+  s= getaddrinfo(argv[1],NULL,&hints,&result);
+  if (s !=0) {
+    printf("error in getaddrinfo : %s\n", gai_strerror(s));
+    return 1;
+  }
+  strcpy(canonname, result->ai_canonname);
+  printf("%s\n",canonname);
+  int error;
+  char hostname[NI_MAXHOST] = "";
+  char oldhostname[NI_MAXHOST]="uesh";
+  for (p = result; p != NULL; p = p->ai_next){
+
+    error = getnameinfo(p->ai_addr, p->ai_addrlen, hostname, NI_MAXHOST, NULL, 0, 0);
+    if (error != 0)
+    {
+      printf("error in getnameinfo: %s\n", gai_strerror(error));
+      return 1;
+    }
+    if (strcmp(hostname,"")!=0 && strcmp(hostname,oldhostname)!=0){
+      printf("hostname : %s\n", hostname);
+      strcpy(oldhostname,hostname);
+    }
+    void * ptr;
+    switch(p->ai_family){
+      case AF_INET:
+      ptr = &((struct sockaddr_in * ) p->ai_addr)->sin_addr;
+      break;
+      case AF_INET6:
+      ptr = &((struct sockaddr_in6 * ) p->ai_addr)->sin6_addr;
+      break;
+    }
+    inet_ntop (p->ai_addr->sa_family,ptr, addrstr, 64 );
+    char type[100];
+    switch (p->ai_socktype){
+      case (SOCK_STREAM):
+      strcpy(type,"STREAM");
+      break;
+      case (SOCK_DGRAM):
+      strcpy(type,"DGRAM");
+      break;
+    }
+    printf("IP : %s type : %s\n",addrstr,type);
+  }
+  return 0;
+}
-- 
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