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|
$NetBSD: patch-ae,v 1.3 2009/02/11 08:06:17 obache Exp $
--- getifname.c.orig 2004-05-03 08:55:53.000000000 +0000
+++ getifname.c
@@ -17,7 +17,7 @@
#include <unistd.h> /* close */
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || \
- defined(__bsdi__) || defined(__APPLE__)
+ defined(__bsdi__) || defined(__APPLE__) || defined(__DragonFly__)
#include <stdlib.h>
#include <ifaddrs.h>
#include <net/route.h>
@@ -27,12 +27,12 @@
#include "globals.h"
#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) && \
- !defined(__linux__) && !defined(__sun__) && !defined(__bsdi__) && \
- !defined(__APPLE__)
+ !defined(__linux__) && !defined(__sun) && !defined(__bsdi__) && \
+ !defined(__APPLE__) && !defined(__DragonFly__)
#error Sorry, interface code not implemented.
#endif
-#ifdef __sun__
+#ifdef __sun
#include <sys/sockio.h>
#include <net/route.h>
#include <net/if_dl.h>
@@ -40,15 +40,16 @@
static int get_output_if(struct sockaddr_in *dest, struct sockaddr_in *ifip);
-#if (defined OSTYPE_LINUX) || (defined __sun__)
+#if (defined OSTYPE_LINUX) || (defined __sun)
int get_if_name(void)
{
int fd;
struct ifconf ifc;
- struct ifreq ibuf[16],
- ifr,
+ struct ifreq ifr,
*ifrp,
*ifend;
+ char *ibuf;
+ int ibuflen;
struct sockaddr_in sa;
struct sockaddr_in output_if_addr;
int known_output_if = 0;
@@ -72,21 +73,40 @@ int get_if_name(void)
return -1;
}
- memset(ibuf, 0, sizeof(struct ifreq)*16);
- ifc.ifc_len = sizeof ibuf;
+ ibuf = NULL;
+ ibuflen = 16 * sizeof(struct ifreq);
+ for (;;) {
+ char *nibuf = (char *) realloc(ibuf, ibuflen);
+ if (!nibuf) {
+ perror("[get_if_name] realloc");
+ goto go_out;
+ }
+
+ ibuf = nibuf;
+ memset(ibuf, 0, ibuflen);
+ ifc.ifc_len = ibuflen;
ifc.ifc_buf = (caddr_t) ibuf;
/* gets interfaces list */
if ( ioctl(fd, SIOCGIFCONF, (char*)&ifc) == -1 ||
ifc.ifc_len < sizeof(struct ifreq) ) {
perror("[get_if_name] ioctl(SIOCGIFCONF)");
- close(fd);
- return -1;
+ goto go_out;
+ }
+
+ if (ifc.ifc_len + sizeof(struct ifreq) <= ibuflen)
+ break;
+ if (ibuflen >= 1024 * sizeof(struct ifreq)) {
+ fprintf(stderr, "Warning: Too many network "
+ "interfaces.\n");
+ break;
+ }
+ ibuflen *= 2;
}
/* ifrp points to buffer and ifend points to buffer's end */
- ifrp = ibuf;
- ifend = (struct ifreq*) ((char*)ibuf + ifc.ifc_len);
+ ifrp = (struct ifreq *) ibuf;
+ ifend = (struct ifreq *) (ibuf + ifc.ifc_len);
for (; ifrp < ifend; ifrp++) {
strlcpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifr.ifr_name));
@@ -155,27 +175,28 @@ int get_if_name(void)
}
else
{
-#ifdef __sun__
+#ifdef __sun
/* somehow solaris is braidamaged in wrt ifr_mtu */
h_if_mtu = ifr.ifr_metric;
#else
h_if_mtu = ifr.ifr_mtu;
#endif
}
- close(fd);
- return 0;
+ goto go_out;
}
/* interface not found, use 'lo' */
strlcpy(ifname, "lo", 1024);
strlcpy(ifstraddr, "127.0.0.1", 1024);
h_if_mtu = 1500;
+go_out:
+ free(ibuf);
close(fd);
return 0;
}
#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
- defined(__bsdi__) || defined(__APPLE__)
+ defined(__bsdi__) || defined(__APPLE__) || defined(__DragonFly__)
/* return interface informations :
- from the specified (-I) interface
|
