char *
netsnmp_ipv4_fmtaddr(const char *prefix, netsnmp_transport *t,
void *data, int len)
{
netsnmp_indexed_addr_pair *addr_pair = NULL;
struct hostent *host;
char tmp[64];
if (data != NULL && len == sizeof(netsnmp_indexed_addr_pair)) {
addr_pair = (netsnmp_indexed_addr_pair *) data;
} else if (t != NULL && t->data != NULL) {
addr_pair = (netsnmp_indexed_addr_pair *) t->data;
}
if (addr_pair == NULL) {
snprintf(tmp, sizeof(tmp), "%s: unknown", prefix);
} else {
struct sockaddr_in *to = NULL;
to = (struct sockaddr_in *) &(addr_pair->remote_addr);
if (to == NULL) {
snprintf(tmp, sizeof(tmp), "%s: unknown->[%s]:%hu", prefix,
inet_ntoa(addr_pair->local_addr.sin.sin_addr),
ntohs(addr_pair->local_addr.sin.sin_port));
} else if (t && t->flags & NETSNMP_TRANSPORT_FLAG_C) {
int flags = 0;
if (!(t->flags & NETSNMP_TRANSPORT_FLAG_HOSTNAME))
flags |= NI_NUMERICHOST;
int res = getnameinfo((struct sockaddr *)to, sizeof(struct sockaddr_in),
tmp, sizeof(tmp), NULL, 0, flags);
DEBUGMSGTL(("netsnmp_ipv4_fmtaddr",
"flags=%d, res=%d, tmp=%s\n", flags, res, tmp));
if (res == EAI_AGAIN) {
flags |= NI_NUMERICHOST;
res = getnameinfo((struct sockaddr *)to, sizeof(struct sockaddr_in6),
tmp, sizeof(tmp), NULL, 0, flags);
}
if (res != 0)
return NULL;
} else if ( t && t->flags & NETSNMP_TRANSPORT_FLAG_HOSTNAME ) {
/* XXX: hmm... why isn't this prefixed */
/* assuming intentional */
host = netsnmp_gethostbyaddr((char *)&to->sin_addr, 4, AF_INET);
return (host ? strdup(host->h_name) : NULL);
} else {
snprintf(tmp, sizeof(tmp), "%s: [%s]:%hu->", prefix,
inet_ntoa(to->sin_addr), ntohs(to->sin_port));
snprintf(tmp + strlen(tmp), sizeof(tmp)-strlen(tmp), "[%s]:%hu",
inet_ntoa(addr_pair->local_addr.sin.sin_addr),
ntohs(addr_pair->local_addr.sin.sin_port));
}
}
tmp[sizeof(tmp)-1] = '\0';
return strdup(tmp);
}
char *
netsnmp_ipv4_fmtaddr(const char *prefix, netsnmp_transport *t,
void *data, int len)
{
netsnmp_indexed_addr_pair *addr_pair = NULL;
struct hostent *host;
char tmp[64];
if (data != NULL && len == sizeof(netsnmp_indexed_addr_pair)) {
addr_pair = (netsnmp_indexed_addr_pair *) data;
} else if (t != NULL && t->data != NULL) {
addr_pair = (netsnmp_indexed_addr_pair *) t->data;
}
if (addr_pair == NULL) {
snprintf(tmp, sizeof(tmp), "%s: unknown", prefix);
} else {
struct sockaddr_in *to = NULL;
to = (struct sockaddr_in *) &(addr_pair->remote_addr);
if (to == NULL) {
snprintf(tmp, sizeof(tmp), "%s: unknown->[%s]:%hu", prefix,
inet_ntoa(addr_pair->local_addr.sin.sin_addr),
ntohs(addr_pair->local_addr.sin.sin_port));
} else if ( t && t->flags & NETSNMP_TRANSPORT_FLAG_HOSTNAME ) {
/* XXX: hmm... why isn't this prefixed */
/* assuming intentional */
host = netsnmp_gethostbyaddr((char *)&to->sin_addr, sizeof(struct in_addr), AF_INET);
return (host ? strdup(host->h_name) : NULL);
} else {
snprintf(tmp, sizeof(tmp), "%s: [%s]:%hu->", prefix,
inet_ntoa(to->sin_addr), ntohs(to->sin_port));
snprintf(tmp + strlen(tmp), sizeof(tmp)-strlen(tmp), "[%s]:%hu",
inet_ntoa(addr_pair->local_addr.sin.sin_addr),
ntohs(addr_pair->local_addr.sin.sin_port));
}
}
tmp[sizeof(tmp)-1] = '\0';
return strdup(tmp);
}
char *
inet6name(const unsigned char *in6)
{
char *cp;
static char line[NI_MAXHOST];
static char domain[MAXHOSTNAMELEN];
static int first = 1;
#ifdef NETSNMP_ENABLE_IPV6
struct hostent *hp;
char hbuf[NI_MAXHOST];
const int niflag = NI_NUMERICHOST;
struct sockaddr_in6 sin6;
const struct in6_addr *in6p = (const struct in6_addr *)in6;
#endif
if (first && !nflag) {
first = 0;
if (gethostname(domain, sizeof(domain)) == 0 &&
(cp = strchr(domain, '.')))
(void) strlcpy(domain, cp + 1, sizeof domain);
else
domain[0] = '\0';
}
#ifdef NETSNMP_ENABLE_IPV6
cp = NULL;
if (!nflag && !IN6_IS_ADDR_UNSPECIFIED(in6p)) {
hp = netsnmp_gethostbyaddr((const char *)in6p, sizeof(*in6p),
AF_INET6);
if (hp) {
if ((cp = strchr(hp->h_name, '.')) &&
!strcmp(cp + 1, domain))
*cp = 0;
cp = hp->h_name;
}
}
if (IN6_IS_ADDR_UNSPECIFIED(in6p))
strlcpy(line, "*", sizeof(line));
else if (cp)
strlcpy(line, cp, sizeof(line));
else {
memset(&sin6, 0, sizeof(sin6));
/* sin6.sin6_len = sizeof(sin6); */
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = *in6p;
#ifdef __KAME__
if (IN6_IS_ADDR_LINKLOCAL(in6p) ||
IN6_IS_ADDR_MC_LINKLOCAL(in6p)) {
sin6.sin6_scope_id =
ntohs(*(const uint16_t *)&in6p->s6_addr[2]);
sin6.sin6_addr.s6_addr[2] = 0;
sin6.sin6_addr.s6_addr[3] = 0;
}
#endif
if (getnameinfo((struct sockaddr *)&sin6, sizeof(sin6),
hbuf, sizeof(hbuf), NULL, 0, niflag) != 0)
strlcpy(hbuf, "?", sizeof hbuf);
strlcpy(line, hbuf, sizeof(line));
}
#else
strlcpy(line, "[[XXX - inet6 address]]", sizeof(line));
#endif
return (line);
}
/*
* Construct an Internet address representation.
* If the nflag has been supplied, give
* numeric value, otherwise try for symbolic name.
*/
char *
inetname(struct in_addr *inp)
{
char *cp;
static char line[50];
struct hostent *hp;
struct netent *np;
static char domain[MAXHOSTNAMELEN];
static int first = 1;
#if defined (WIN32) || defined (cygwin)
char host_temp[] = "localhost";
#endif
if (first && !nflag) {
first = 0;
if (gethostname(domain, sizeof(domain)) == 0 &&
(cp = strchr(domain, '.')))
(void) strlcpy(domain, cp + 1, sizeof domain);
else
domain[0] = '\0';
}
cp = NULL;
if (!nflag && inp->s_addr != INADDR_ANY) {
int net = inet_netof(*inp);
int lna = inet_lnaof(*inp);
if (lna == INADDR_ANY) {
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}
if (cp == NULL) {
hp = netsnmp_gethostbyaddr((char *)inp, sizeof (*inp),
AF_INET);
if (hp) {
if ((cp = strchr(hp->h_name, '.')) &&
!strcmp(cp + 1, domain))
*cp = '\0';
#if defined (WIN32) || defined (cygwin)
/* Windows insists on returning the computer name for 127.0.0.1
* even if the hosts file lists something else such as 'localhost'.
* If we are trying to look up 127.0.0.1, just return 'localhost' */
if (!strcmp(inet_ntoa(*inp),"127.0.0.1"))
cp = host_temp;
else
#endif
cp = hp->h_name;
}
}
}
if (inp->s_addr == INADDR_ANY)
snprintf(line, sizeof line, "*");
else if (cp)
snprintf(line, sizeof line, "%s", cp);
else {
inp->s_addr = ntohl(inp->s_addr);
#define C(x) (unsigned)((x) & 0xff)
snprintf(line, sizeof line, "%u.%u.%u.%u",
C(inp->s_addr >> 24), C(inp->s_addr >> 16),
C(inp->s_addr >> 8), C(inp->s_addr));
}
return (line);
}