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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"
#include "log.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 */
log_printf(log_error, "failed compiling regexp: %i", e);
return strdup(addr);
}
if ((e = regexec(&r, addr, 5, m, 0))) {
log_printf(log_error, "failed regexp match: %i", 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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