示例#1
0
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);
}
示例#3
0
文件: inet6.c 项目: ColdStart/SNMPD
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);
}
示例#4
0
文件: inet.c 项目: bill2016/net-snmp
/*
 * 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);
}