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/*** IP address sanitization for qemu.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <regex.h>
#include "qemuipsanitize.h"
const char* sanitize_ipaddress(const char*addr)
{
/* return 10.0.2.2 (qemu host OS address) if localhost */
const char* local_host="10.0.2.2";
struct hostent* h;
h=gethostbyname(addr);
if(h)
{
if (h->h_addr[0]==127)
{
return local_host;
}
}
return addr;
}
static char* r_offstr(regmatch_t m, const char*s)
{
char*r;
if(m.rm_so!=-1)
{
r=strdup(s+m.rm_so);
r[m.rm_eo-m.rm_so]=0;
return r;
}
else return strdup("");
}
char* sanitize_mirror(const char*addr)
{
/* parse IP address string */
regex_t r;
int e;
regmatch_t m[5];
char*buf=NULL;
char* a;
char* b;
char* c;
char* d;
if((e=regcomp(&r, "^([^:]*://)([^:/]*)(:[0-9]+)?(.*)$", REG_EXTENDED)))
{
/* error */
fprintf(stderr, "failed compiling regexp: %i\n", e);
return strdup(addr);
}
if((e=regexec(&r, addr, 5, m, 0)))
{
fprintf(stderr, "failed regexp match: %i\n", e);
return strdup(addr);
}
asprintf(&buf,"%s%s%s%s",
a=r_offstr(m[1],addr),
sanitize_ipaddress(b=r_offstr(m[2],addr)),
c=r_offstr(m[3],addr),
d=r_offstr(m[4],addr));
free(a);
free(b);
free(c);
free(d);
regfree(&r);
return buf;
}
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