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9.0

Error while Returning an Array of char* from Function

Asked by ktd85 in C Programming Language

Tags: C, assignment makes integer from pointer without a cast & passing argument 1 of âsprintfâ makes pointer from integer without a cast

Hello,

i want to implement a function, which returns a array of char* with well formated IPs from an DNS-Lookedup Hostname.
I created the attached code and get the following warnings while compiling.
The Array needs to be dynamical because the count of IPs returned by the DNS Lookup is not known at compile-time.
Can anyone help to solve the warnings?

In function âgetipâ:
warning: assignment makes integer from pointer without a cast
warning: passing argument 1 of âsprintfâ makes pointer from integer without a cast
warning: assignment makes integer from pointer without a cast
warning: passing argument 1 of âstrcpyâ makes pointer from integer without a cast

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             char *getip(char *dnsname)
{
struct hostent *hostinfo;
 
if (hostinfo = gethostbyname (dnsname))
{
        printf ("Address length:     %d\n", hostinfo->h_length);
 
int ips=0;
 
while (hostinfo->h_addr_list[ips]!=NULL)
ips++;
 
char *ergebnis = (char *)malloc( ips * sizeof( char ) );
 
int i;
while (hostinfo->h_addr_list[i]!=NULL)
{
ergebnis[i]=malloc(16);
sprintf(ergebnis[i],"%d.%d.%d.%d",(unsigned char)hostinfo->h_addr_list[i][0],\
                                    (unsigned char)hostinfo->h_addr_list[i][1],\
                                    (unsigned char)hostinfo->h_addr_list[i][2],\
                                    (unsigned char)hostinfo->h_addr_list[i][3]);
i++;
}
return ergebnis;
} else
{
char *ergebnis = (char *)malloc( sizeof( char ) );
ergebnis[0]=malloc(6);
strcpy(ergebnis[0],"failed");
return ergebnis;
}
}

           
         

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Error while Returning an Array of char* from Function

Asked by ktd85 in C Programming Language

Tags: C, assignment makes integer from pointer without a cast & passing argument 1 of âsprintfâ makes pointer from integer without a cast

About this solution