/*
netutl.c -- some supporting network utility code
- Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>
- 2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1998-2005 Ivo Timmermans
+ 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: netutl.c,v 1.12.4.47 2003/07/17 15:06:26 guus Exp $
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "system.h"
#include "utils.h"
#include "xalloc.h"
-int hostnames = 0;
+bool hostnames = false;
/*
Turn a string into a struct addrinfo.
Return NULL on failure.
*/
-struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
-{
- struct addrinfo hint, *ai;
+struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
+ struct addrinfo *ai, hint = {0};
int err;
- cp();
-
- memset(&hint, 0, sizeof(hint));
-
hint.ai_family = addressfamily;
hint.ai_socktype = socktype;
+#if HAVE_DECL_RES_INIT
+ res_init();
+#endif
err = getaddrinfo(address, service, &hint, &ai);
if(err) {
- logger(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address,
- service, gai_strerror(err));
+ logger(DEBUG_ALWAYS, LOG_WARNING, "Error looking up %s port %s: %s", address, service, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
return NULL;
}
return ai;
}
-sockaddr_t str2sockaddr(char *address, char *port)
-{
- struct addrinfo hint, *ai;
- sockaddr_t result;
+sockaddr_t str2sockaddr(const char *address, const char *port) {
+ struct addrinfo *ai, hint = {0};
+ sockaddr_t result = {{0}};
int err;
- cp();
-
- memset(&hint, 0, sizeof(hint));
-
hint.ai_family = AF_UNSPEC;
hint.ai_flags = AI_NUMERICHOST;
hint.ai_socktype = SOCK_STREAM;
err = getaddrinfo(address, port, &hint, &ai);
if(err || !ai) {
- logger(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port,
- gai_strerror(err));
- cp_trace();
- raise(SIGFPE);
- exit(0);
+ logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Unknown type address %s port %s", address, port);
+ result.sa.sa_family = AF_UNKNOWN;
+ result.unknown.address = xstrdup(address);
+ result.unknown.port = xstrdup(port);
+ return result;
}
- result = *(sockaddr_t *) ai->ai_addr;
+ memcpy(&result, ai->ai_addr, ai->ai_addrlen);
freeaddrinfo(ai);
return result;
}
-void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
-{
+void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
char address[NI_MAXHOST];
char port[NI_MAXSERV];
char *scopeid;
int err;
- cp();
+ if(sa->sa.sa_family == AF_UNSPEC) {
+ if(addrstr)
+ *addrstr = xstrdup("unspec");
+ if(portstr)
+ *portstr = xstrdup("unspec");
+ return;
+ } else if(sa->sa.sa_family == AF_UNKNOWN) {
+ if(addrstr)
+ *addrstr = xstrdup(sa->unknown.address);
+ if(portstr)
+ *portstr = xstrdup(sa->unknown.port);
+ return;
+ }
- err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
+ err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port, NI_NUMERICHOST | NI_NUMERICSERV);
if(err) {
- logger(LOG_ERR, _("Error while translating addresses: %s"),
- gai_strerror(err));
- cp_trace();
- raise(SIGFPE);
- exit(0);
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while translating addresses: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
+ abort();
}
scopeid = strchr(address, '%');
if(scopeid)
- *scopeid = '\0'; /* Descope. */
+ *scopeid = '\0'; /* Descope. */
- *addrstr = xstrdup(address);
- *portstr = xstrdup(port);
+ if(addrstr)
+ *addrstr = xstrdup(address);
+ if(portstr)
+ *portstr = xstrdup(port);
}
-char *sockaddr2hostname(sockaddr_t *sa)
-{
+char *sockaddr2hostname(const sockaddr_t *sa) {
char *str;
char address[NI_MAXHOST] = "unknown";
char port[NI_MAXSERV] = "unknown";
int err;
- cp();
+ if(sa->sa.sa_family == AF_UNSPEC) {
+ xasprintf(&str, "unspec port unspec");
+ return str;
+ } else if(sa->sa.sa_family == AF_UNKNOWN) {
+ xasprintf(&str, "%s port %s", sa->unknown.address, sa->unknown.port);
+ return str;
+ }
- err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port),
+ err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port,
hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
if(err) {
- logger(LOG_ERR, _("Error while looking up hostname: %s"),
- gai_strerror(err));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while looking up hostname: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
}
- asprintf(&str, _("%s port %s"), address, port);
+ xasprintf(&str, "%s port %s", address, port);
return str;
}
-int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
-{
+int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b) {
int result;
- cp();
-
result = a->sa.sa_family - b->sa.sa_family;
if(result)
case AF_UNSPEC:
return 0;
- case AF_INET:
- result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+ case AF_UNKNOWN:
+ return strcmp(a->unknown.address, b->unknown.address);
- if(result)
- return result;
-
- return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
+ case AF_INET:
+ return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
case AF_INET6:
- result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
-
- if(result)
- return result;
-
- return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
+ return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
default:
- logger(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"),
+ logger(DEBUG_ALWAYS, LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
a->sa.sa_family);
- cp_trace();
- raise(SIGFPE);
- exit(0);
- }
-}
-
-void sockaddrunmap(sockaddr_t *sa)
-{
- if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
- sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
- sa->in.sin_family = AF_INET;
+ abort();
}
}
-/* Subnet mask handling */
-
-int maskcmp(void *va, void *vb, int masklen, int len)
-{
- int i, m, result;
- char *a = va;
- char *b = vb;
+int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
+ int result;
- cp();
+ result = a->sa.sa_family - b->sa.sa_family;
- for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
- result = a[i] - b[i];
- if(result)
- return result;
- }
+ if(result)
+ return result;
- if(m)
- return (a[i] & (0x100 - (1 << (8 - m)))) -
- (b[i] & (0x100 - (1 << (8 - m))));
+ switch (a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
- return 0;
-}
+ case AF_UNKNOWN:
+ result = strcmp(a->unknown.address, b->unknown.address);
-void mask(void *va, int masklen, int len)
-{
- int i;
- char *a = va;
+ if(result)
+ return result;
- cp();
+ return strcmp(a->unknown.port, b->unknown.port);
- i = masklen / 8;
- masklen %= 8;
+ case AF_INET:
+ result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof a->in.sin_addr);
- if(masklen)
- a[i++] &= (0x100 - (1 << masklen));
+ if(result)
+ return result;
- for(; i < len; i++)
- a[i] = 0;
-}
+ return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof a->in.sin_port);
-void maskcpy(void *va, void *vb, int masklen, int len)
-{
- int i, m;
- char *a = va;
- char *b = vb;
+ case AF_INET6:
+ result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof a->in6.sin6_addr);
- cp();
+ if(result)
+ return result;
- for(m = masklen, i = 0; m >= 8; m -= 8, i++)
- a[i] = b[i];
+ return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof a->in6.sin6_port);
- if(m) {
- a[i] = b[i] & (0x100 - (1 << m));
- i++;
+ default:
+ logger(DEBUG_ALWAYS, LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
}
-
- for(; i < len; i++)
- a[i] = 0;
}
-int maskcheck(void *va, int masklen, int len)
-{
- int i;
- char *a = va;
-
- cp();
-
- i = masklen / 8;
- masklen %= 8;
-
- if(masklen && a[i++] & (0xff >> masklen))
- return -1;
+void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
+ if(b->sa.sa_family != AF_UNKNOWN) {
+ *a = *b;
+ } else {
+ a->unknown.family = AF_UNKNOWN;
+ a->unknown.address = xstrdup(b->unknown.address);
+ a->unknown.port = xstrdup(b->unknown.port);
+ }
+}
- for(; i < len; i++)
- if(a[i] != 0)
- return -2;
+void sockaddrfree(sockaddr_t *a) {
+ if(a->sa.sa_family == AF_UNKNOWN) {
+ free(a->unknown.address);
+ free(a->unknown.port);
+ }
+}
- return 0;
+void sockaddrunmap(sockaddr_t *sa) {
+ if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
+ sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
+ sa->in.sin_family = AF_INET;
+ }
}
projects / tinc / blobdiff