Commit 85eac861 by pdw

Reversed previous FreeBSD patch.

1 parent 120a1b2c
Showing with 17 additions and 28 deletions
Things to do for iftop
$Id$
* Revert old FreeBSD patch, install new one
* Re-fix import order for Mac OS X
* Add configurable offset for DLT_RAW
* IP types other than v4?
......
......@@ -6,7 +6,6 @@
static const char rcsid[] = "$Id$";
#include <sys/socket.h>
#include <sys/types.h>
#include <errno.h>
......
......@@ -37,22 +37,6 @@ int tail;
extern options_t options;
int guess_af(struct in6_addr *addr)
{
/* If the upper three (network byte order) uint32-parts
* are null, then there ought to be an IPv4 address here.
* Any such IPv6 would have to be 'xxxx::'. Neglectable? */
uint32_t* probe;
int af;
probe = (uint32_t *) addr;
return (probe[1] || probe[2] || probe[3]) ? AF_INET6 : AF_INET;
}
socklen_t aflength(int af)
{
return af == AF_INET6 ? sizeof(struct in6_addr) : sizeof(struct in_addr);
}
/*
* We have a choice of resolver methods. Real computers have getnameinfo or
......@@ -76,11 +60,18 @@ char *do_resolve(struct in6_addr *addr) {
struct sockaddr_in6 sin6;
char buf[NI_MAXHOST]; /* 1025 */
int res, af;
uint32_t* probe;
memset(&sin, '\0', sizeof(sin));
memset(&sin6, '\0', sizeof(sin6));
switch (guess_af(addr)) {
/* If the upper three (network byte order) uint32-parts
* are null, then there ought to be an IPv4 address here.
* Any such IPv6 would have to be 'xxxx::'. Neglectable? */
probe = (uint32_t *) addr;
af = (probe[1] || probe[2] || probe[3]) ? AF_INET6 : AF_INET;
switch (af) {
case AF_INET:
sin.sin_family = af;
sin.sin_port = 0;
......@@ -115,29 +106,26 @@ char *do_resolve(struct in6_addr *addr) {
* Some implementations of libc choose to implement gethostbyaddr_r as
* a non thread-safe wrapper to gethostbyaddr. An interesting choice...
*/
char* do_resolve(struct in6_addr * addr) {
char* do_resolve(struct in_addr * addr) {
struct hostent hostbuf, *hp;
size_t hstbuflen = 1024;
char *tmphstbuf;
int res;
int herr;
int af;
char * ret = NULL;
/* Allocate buffer, remember to free it to avoid memory leakage. */
tmphstbuf = xmalloc (hstbuflen);
af = guess_af(addr);
/* Some machines have gethostbyaddr_r returning an integer error code; on
* others, it returns a struct hostent*. */
#ifdef GETHOSTBYADDR_R_RETURNS_INT
while ((res = gethostbyaddr_r((char*)addr, aflength(af), af,
while ((res = gethostbyaddr_r((char*)addr, sizeof(struct in_addr), AF_INET,
&hostbuf, tmphstbuf, hstbuflen,
&hp, &herr)) == ERANGE)
#else
/* ... also assume one fewer argument.... */
while ((hp = gethostbyaddr_r((char*)addr, aflength(af), af,
while ((hp = gethostbyaddr_r((char*)addr, sizeof(struct in_addr), AF_INET,
&hostbuf, tmphstbuf, hstbuflen, &herr)) == NULL
&& errno == ERANGE)
#endif
......@@ -171,11 +159,9 @@ char *do_resolve(struct in6_addr *addr) {
static pthread_mutex_t ghba_mtx = PTHREAD_MUTEX_INITIALIZER;
char *s = NULL;
struct hostent *he;
int af;
af = guess_af(addr);
pthread_mutex_lock(&ghba_mtx);
he = gethostbyaddr((char*)addr, aflength(af), af);
he = gethostbyaddr((char*)addr, sizeof *addr, AF_INET);
if (he)
s = xstrdup(he->h_name);
pthread_mutex_unlock(&ghba_mtx);
......@@ -313,7 +299,7 @@ char *do_resolve(struct in6_addr * addr) {
#elif defined(USE_FORKING_RESOLVER)
/**
* Resolver which forks a process, then uses gethostbyaddr.
* Resolver which forks a process, then uses gethostbyname.
*/
#include <signal.h>
......
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