#include "curl_setup.h"
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
# include <net/if.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef HAVE_SYS_SOCKIO_H
# include <sys/sockio.h>
#endif
#ifdef HAVE_IFADDRS_H
# include <ifaddrs.h>
#endif
#ifdef HAVE_STROPTS_H
# include <stropts.h>
#endif
#ifdef __VMS
# include <inet.h>
#endif
#include "inet_ntop.h"
#include "strcase.h"
#include "if2ip.h"
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
unsigned int Curl_ipv6_scope(const struct sockaddr *sa)
{
#ifndef ENABLE_IPV6
(void) sa;
#else
if(sa->sa_family == AF_INET6) {
const struct sockaddr_in6 * sa6 = (const struct sockaddr_in6 *)(void *) sa;
const unsigned char *b = sa6->sin6_addr.s6_addr;
unsigned short w = (unsigned short) ((b[0] << 8) | b[1]);
if((b[0] & 0xFE) == 0xFC)
return IPV6_SCOPE_UNIQUELOCAL;
switch(w & 0xFFC0) {
case 0xFE80:
return IPV6_SCOPE_LINKLOCAL;
case 0xFEC0:
return IPV6_SCOPE_SITELOCAL;
case 0x0000:
w = b[1] | b[2] | b[3] | b[4] | b[5] | b[6] | b[7] | b[8] | b[9] |
b[10] | b[11] | b[12] | b[13] | b[14];
if(w || b[15] != 0x01)
break;
return IPV6_SCOPE_NODELOCAL;
default:
break;
}
}
#endif
return IPV6_SCOPE_GLOBAL;
}
#if defined(HAVE_GETIFADDRS)
if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
unsigned int remote_scope_id, const char *interf,
char *buf, int buf_size)
{
struct ifaddrs *iface, *head;
if2ip_result_t res = IF2IP_NOT_FOUND;
#ifndef ENABLE_IPV6
(void) remote_scope;
#endif
#if !defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID) || \
!defined(ENABLE_IPV6)
(void) remote_scope_id;
#endif
if(getifaddrs(&head) >= 0) {
for(iface = head; iface != NULL; iface = iface->ifa_next) {
if(iface->ifa_addr != NULL) {
if(iface->ifa_addr->sa_family == af) {
if(strcasecompare(iface->ifa_name, interf)) {
void *addr;
char *ip;
char scope[12] = "";
char ipstr[64];
#ifdef ENABLE_IPV6
if(af == AF_INET6) {
unsigned int scopeid = 0;
unsigned int ifscope = Curl_ipv6_scope(iface->ifa_addr);
if(ifscope != remote_scope) {
if(res == IF2IP_NOT_FOUND) res = IF2IP_AF_NOT_SUPPORTED;
continue;
}
addr =
&((struct sockaddr_in6 *)(void *)iface->ifa_addr)->sin6_addr;
#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
scopeid = ((struct sockaddr_in6 *)(void *)iface->ifa_addr)
->sin6_scope_id;
if(remote_scope_id && scopeid != remote_scope_id) {
if(res == IF2IP_NOT_FOUND)
res = IF2IP_AF_NOT_SUPPORTED;
continue;
}
#endif
if(scopeid)
msnprintf(scope, sizeof(scope), "%%%u", scopeid);
}
else
#endif
addr =
&((struct sockaddr_in *)(void *)iface->ifa_addr)->sin_addr;
res = IF2IP_FOUND;
ip = (char *) Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr));
msnprintf(buf, buf_size, "%s%s", ip, scope);
break;
}
}
else if((res == IF2IP_NOT_FOUND) &&
strcasecompare(iface->ifa_name, interf)) {
res = IF2IP_AF_NOT_SUPPORTED;
}
}
}
freeifaddrs(head);
}
return res;
}
#elif defined(HAVE_IOCTL_SIOCGIFADDR)
if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
unsigned int remote_scope_id, const char *interf,
char *buf, int buf_size)
{
struct ifreq req;
struct in_addr in;
struct sockaddr_in *s;
curl_socket_t dummy;
size_t len;
(void)remote_scope;
(void)remote_scope_id;
if(!interf || (af != AF_INET))
return IF2IP_NOT_FOUND;
len = strlen(interf);
if(len >= sizeof(req.ifr_name))
return IF2IP_NOT_FOUND;
dummy = socket(AF_INET, SOCK_STREAM, 0);
if(CURL_SOCKET_BAD == dummy)
return IF2IP_NOT_FOUND;
memset(&req, 0, sizeof(req));
memcpy(req.ifr_name, interf, len + 1);
req.ifr_addr.sa_family = AF_INET;
if(ioctl(dummy, SIOCGIFADDR, &req) < 0) {
sclose(dummy);
return IF2IP_NOT_FOUND;
}
s = (struct sockaddr_in *)(void *)&req.ifr_addr;
memcpy(&in, &s->sin_addr, sizeof(in));
Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
sclose(dummy);
return IF2IP_FOUND;
}
#else
if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
unsigned int remote_scope_id, const char *interf,
char *buf, int buf_size)
{
(void) af;
(void) remote_scope;
(void) remote_scope_id;
(void) interf;
(void) buf;
(void) buf_size;
return IF2IP_NOT_FOUND;
}
#endif