Samba utility functions
Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
Copyright (C) Andrew Tridgell 1992-1998
- Copyright (C) Jeremy Allison 2001-2002
+ Copyright (C) Jeremy Allison 2001-2007
Copyright (C) Simo Sorce 2001
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
Copyright (C) James J Myers 2003
#include "system/network.h"
#include "system/locale.h"
#include "system/filesys.h"
+#undef strcasecmp
/**
- Interpret an internet address or name into an IP address in 4 byte form.
-**/
-_PUBLIC_ uint32_t interpret_addr(const char *str)
+ * Wrap getaddrinfo...
+ */
+bool interpret_string_addr_internal(struct addrinfo **ppres,
+ const char *str, int flags)
{
- struct hostent *hp;
- uint32_t res;
+ int ret;
+ struct addrinfo hints;
- if (str == NULL || *str == 0 ||
- strcmp(str,"0.0.0.0") == 0) {
- return 0;
- }
- if (strcmp(str,"255.255.255.255") == 0) {
- return 0xFFFFFFFF;
- }
- /* recognise 'localhost' as a special name. This fixes problems with
- some hosts that don't have localhost in /etc/hosts */
- if (strcasecmp(str,"localhost") == 0) {
- str = "127.0.0.1";
+ memset(&hints, '\0', sizeof(hints));
+ /* By default make sure it supports TCP. */
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = flags;
+
+ /* Linux man page on getaddinfo() says port will be
+ uninitialized when service string in NULL */
+
+ ret = getaddrinfo(str, NULL,
+ &hints,
+ ppres);
+
+ if (ret) {
+ DEBUG(3,("interpret_string_addr_internal: getaddrinfo failed "
+ "for name %s [%s]\n",
+ str,
+ gai_strerror(ret) ));
+ return false;
}
+ return true;
+}
+
+/**
+ * Interpret an internet address or name into an IP address in 4 byte form.
+ * RETURNS IN NETWORK BYTE ORDER (big endian).
+ */
+
+uint32_t interpret_addr(const char *str)
+{
+ uint32_t ret;
+
+ /* If it's in the form of an IP address then
+ * get the lib to interpret it */
+ if (is_ipaddress_v4(str)) {
+ struct in_addr dest;
- /* if it's in the form of an IP address then get the lib to interpret it */
- if (is_ipaddress(str)) {
- res = inet_addr(str);
+ if (inet_pton(AF_INET, str, &dest) <= 0) {
+ /* Error - this shouldn't happen ! */
+ DEBUG(0,("interpret_addr: inet_pton failed "
+ "host %s\n",
+ str));
+ return 0;
+ }
+ ret = dest.s_addr; /* NETWORK BYTE ORDER ! */
} else {
- /* otherwise assume it's a network name of some sort and use
- sys_gethostbyname */
- if ((hp = sys_gethostbyname(str)) == 0) {
- DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
+ /* Otherwise assume it's a network name of some sort and use
+ getadddrinfo. */
+ struct addrinfo *res = NULL;
+ struct addrinfo *res_list = NULL;
+ if (!interpret_string_addr_internal(&res_list,
+ str,
+ AI_ADDRCONFIG)) {
+ DEBUG(3,("interpret_addr: Unknown host. %s\n",str));
return 0;
}
- if(hp->h_addr == NULL) {
- DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
+ /* Find the first IPv4 address. */
+ for (res = res_list; res; res = res->ai_next) {
+ if (res->ai_family != AF_INET) {
+ continue;
+ }
+ if (res->ai_addr == NULL) {
+ continue;
+ }
+ break;
+ }
+ if(res == NULL) {
+ DEBUG(3,("interpret_addr: host address is "
+ "invalid for host %s\n",str));
+ if (res_list) {
+ freeaddrinfo(res_list);
+ }
return 0;
}
- memcpy((char *)&res,(char *)hp->h_addr, 4);
+ memcpy((char *)&ret,
+ &((struct sockaddr_in *)res->ai_addr)->sin_addr.s_addr,
+ sizeof(ret));
+ if (res_list) {
+ freeaddrinfo(res_list);
+ }
}
- if (res == (uint32_t)-1)
- return(0);
+ /* This is so bogus - all callers need fixing... JRA. */
+ if (ret == (uint32_t)-1) {
+ return 0;
+ }
- return(res);
+ return ret;
}
/**
Check if an IP is the 0.0.0.0.
**/
-_PUBLIC_ bool is_zero_ip(struct in_addr ip)
+_PUBLIC_ bool is_zero_ip_v4(struct in_addr ip)
{
return ip.s_addr == 0;
}
}
/**
- Return true if a string could be a pure IP address.
-**/
+ * Return true if a string could be an IPv4 address.
+ */
-_PUBLIC_ bool is_ipaddress(const char *str)
+bool is_ipaddress_v4(const char *str)
{
- bool pure_address = true;
- int i;
+ int ret = -1;
+ struct in_addr dest;
- if (str == NULL) return false;
+ ret = inet_pton(AF_INET, str, &dest);
+ if (ret > 0) {
+ return true;
+ }
+ return false;
+}
- for (i=0; pure_address && str[i]; i++)
- if (!(isdigit((int)str[i]) || str[i] == '.'))
- pure_address = false;
+/**
+ * Return true if a string could be an IPv4 or IPv6 address.
+ */
- /* Check that a pure number is not misinterpreted as an IP */
- pure_address = pure_address && (strchr(str, '.') != NULL);
+bool is_ipaddress(const char *str)
+{
+#if defined(HAVE_IPV6)
+ int ret = -1;
+
+ if (strchr_m(str, ':')) {
+ char addr[INET6_ADDRSTRLEN];
+ struct in6_addr dest6;
+ const char *sp = str;
+ char *p = strchr_m(str, '%');
+
+ /*
+ * Cope with link-local.
+ * This is IP:v6:addr%ifname.
+ */
+
+ if (p && (p > str) && (if_nametoindex(p+1) != 0)) {
+ strlcpy(addr, str,
+ MIN(PTR_DIFF(p,str)+1,
+ sizeof(addr)));
+ sp = addr;
+ }
+ ret = inet_pton(AF_INET6, sp, &dest6);
+ if (ret > 0) {
+ return true;
+ }
+ }
+#endif
+ return is_ipaddress_v4(str);
+}
+
+/**
+ * Is a sockaddr a broadcast address ?
+ */
+
+bool is_broadcast_addr(const struct sockaddr *pss)
+{
+#if defined(HAVE_IPV6)
+ if (pss->sa_family == AF_INET6) {
+ const struct in6_addr *sin6 =
+ &((const struct sockaddr_in6 *)pss)->sin6_addr;
+ return IN6_IS_ADDR_MULTICAST(sin6);
+ }
+#endif
+ if (pss->sa_family == AF_INET) {
+ uint32_t addr =
+ ntohl(((const struct sockaddr_in *)pss)->sin_addr.s_addr);
+ return addr == INADDR_BROADCAST;
+ }
+ return false;
+}
+
+/**
+ * Check if an IPv7 is 127.0.0.1
+ */
+bool is_loopback_ip_v4(struct in_addr ip)
+{
+ struct in_addr a;
+ a.s_addr = htonl(INADDR_LOOPBACK);
+ return(ip.s_addr == a.s_addr);
+}
+
+/**
+ * Check if a struct sockaddr is the loopback address.
+ */
+bool is_loopback_addr(const struct sockaddr *pss)
+{
+#if defined(HAVE_IPV6)
+ if (pss->sa_family == AF_INET6) {
+ const struct in6_addr *pin6 =
+ &((const struct sockaddr_in6 *)pss)->sin6_addr;
+ return IN6_IS_ADDR_LOOPBACK(pin6);
+ }
+#endif
+ if (pss->sa_family == AF_INET) {
+ const struct in_addr *pin = &((const struct sockaddr_in *)pss)->sin_addr;
+ return is_loopback_ip_v4(*pin);
+ }
+ return false;
+}
- return pure_address;
+/**
+ * Check if a struct sockaddr has an unspecified address.
+ */
+bool is_zero_addr(const struct sockaddr *pss)
+{
+#if defined(HAVE_IPV6)
+ if (pss->sa_family == AF_INET6) {
+ const struct in6_addr *pin6 =
+ &((const struct sockaddr_in6 *)pss)->sin6_addr;
+ return IN6_IS_ADDR_UNSPECIFIED(pin6);
+ }
+#endif
+ if (pss->sa_family == AF_INET) {
+ const struct in_addr *pin = &((const struct sockaddr_in *)pss)->sin_addr;
+ return is_zero_ip_v4(*pin);
+ }
+ return false;
+}
+
+/**
+ * Set an IP to 0.0.0.0.
+ */
+void zero_ip_v4(struct in_addr *ip)
+{
+ memset(ip, '\0', sizeof(struct in_addr));
+}
+
+/**
+ * Convert an IPv4 struct in_addr to a struct sockaddr_storage.
+ */
+void in_addr_to_sockaddr_storage(struct sockaddr_storage *ss,
+ struct in_addr ip)
+{
+ struct sockaddr_in *sa = (struct sockaddr_in *)ss;
+ memset(ss, '\0', sizeof(*ss));
+ sa->sin_family = AF_INET;
+ sa->sin_addr = ip;
+}
+
+#if defined(HAVE_IPV6)
+/**
+ * Convert an IPv6 struct in_addr to a struct sockaddr_storage.
+ */
+void in6_addr_to_sockaddr_storage(struct sockaddr_storage *ss,
+ struct in6_addr ip)
+{
+ struct sockaddr_in6 *sa = (struct sockaddr_in6 *)ss;
+ memset(ss, '\0', sizeof(*ss));
+ sa->sin6_family = AF_INET6;
+ sa->sin6_addr = ip;
+}
+#endif
+
+/**
+ * Are two IPs on the same subnet?
+ */
+bool same_net(const struct sockaddr *ip1,
+ const struct sockaddr *ip2,
+ const struct sockaddr *mask)
+{
+ if (ip1->sa_family != ip2->sa_family) {
+ /* Never on the same net. */
+ return false;
+ }
+
+#if defined(HAVE_IPV6)
+ if (ip1->sa_family == AF_INET6) {
+ struct sockaddr_in6 ip1_6 = *(const struct sockaddr_in6 *)ip1;
+ struct sockaddr_in6 ip2_6 = *(const struct sockaddr_in6 *)ip2;
+ struct sockaddr_in6 mask_6 = *(const struct sockaddr_in6 *)mask;
+ char *p1 = (char *)&ip1_6.sin6_addr;
+ char *p2 = (char *)&ip2_6.sin6_addr;
+ char *m = (char *)&mask_6.sin6_addr;
+ int i;
+
+ for (i = 0; i < sizeof(struct in6_addr); i++) {
+ *p1++ &= *m;
+ *p2++ &= *m;
+ m++;
+ }
+ return (memcmp(&ip1_6.sin6_addr,
+ &ip2_6.sin6_addr,
+ sizeof(struct in6_addr)) == 0);
+ }
+#endif
+ if (ip1->sa_family == AF_INET) {
+ return same_net_v4(((const struct sockaddr_in *)ip1)->sin_addr,
+ ((const struct sockaddr_in *)ip2)->sin_addr,
+ ((const struct sockaddr_in *)mask)->sin_addr);
+ }
+ return false;
+}
+
+/**
+ * Are two sockaddr 's the same family and address ? Ignore port etc.
+ */
+
+bool sockaddr_equal(const struct sockaddr *ip1,
+ const struct sockaddr *ip2)
+{
+ if (ip1->sa_family != ip2->sa_family) {
+ /* Never the same. */
+ return false;
+ }
+
+#if defined(HAVE_IPV6)
+ if (ip1->sa_family == AF_INET6) {
+ return (memcmp(&((const struct sockaddr_in6 *)ip1)->sin6_addr,
+ &((const struct sockaddr_in6 *)ip2)->sin6_addr,
+ sizeof(struct in6_addr)) == 0);
+ }
+#endif
+ if (ip1->sa_family == AF_INET) {
+ return (memcmp(&((const struct sockaddr_in *)ip1)->sin_addr,
+ &((const struct sockaddr_in *)ip2)->sin_addr,
+ sizeof(struct in_addr)) == 0);
+ }
+ return false;
+}
+
+/**
+ * Is an IP address the INADDR_ANY or in6addr_any value ?
+ */
+bool is_address_any(const struct sockaddr *psa)
+{
+#if defined(HAVE_IPV6)
+ if (psa->sa_family == AF_INET6) {
+ const struct sockaddr_in6 *si6 = (const struct sockaddr_in6 *)psa;
+ if (memcmp(&in6addr_any,
+ &si6->sin6_addr,
+ sizeof(in6addr_any)) == 0) {
+ return true;
+ }
+ return false;
+ }
+#endif
+ if (psa->sa_family == AF_INET) {
+ const struct sockaddr_in *si = (const struct sockaddr_in *)psa;
+ if (si->sin_addr.s_addr == INADDR_ANY) {
+ return true;
+ }
+ return false;
+ }
+ return false;
+}
+
+void set_sockaddr_port(struct sockaddr *psa, uint16_t port)
+{
+#if defined(HAVE_IPV6)
+ if (psa->sa_family == AF_INET6) {
+ ((struct sockaddr_in6 *)psa)->sin6_port = htons(port);
+ }
+#endif
+ if (psa->sa_family == AF_INET) {
+ ((struct sockaddr_in *)psa)->sin_port = htons(port);
+ }
}
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