/*
netutl.c -- some supporting network utility code
Copyright (C) 1998-2005 Ivo Timmermans
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2016 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.
+ 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"
Turn a string into a struct addrinfo.
Return NULL on failure.
*/
-struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype)
-{
- struct addrinfo *ai, hint = {0};
+struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
+ struct addrinfo *ai = NULL, hint = {};
int err;
- cp();
-
hint.ai_family = addressfamily;
hint.ai_socktype = socktype;
+#if HAVE_DECL_RES_INIT
+ // ensure glibc reloads /etc/resolv.conf.
+ res_init();
+#endif
err = getaddrinfo(address, service, &hint, &ai);
if(err) {
- logger(LOG_WARNING, _("Error looking up %s port %s: %s"), address,
- service, gai_strerror(err));
+ logger(LOG_WARNING, "Error looking up %s port %s: %s", address,
+ service, gai_strerror(err));
return NULL;
}
return ai;
}
-sockaddr_t str2sockaddr(const char *address, const char *port)
-{
- struct addrinfo *ai, hint = {0};
+sockaddr_t str2sockaddr(const char *address, const char *port) {
+ struct addrinfo *ai = NULL, hint = {};
sockaddr_t result;
int err;
- cp();
-
hint.ai_family = AF_UNSPEC;
hint.ai_flags = AI_NUMERICHOST;
hint.ai_socktype = SOCK_STREAM;
if(err || !ai) {
ifdebug(SCARY_THINGS)
- logger(LOG_DEBUG, "Unknown type address %s port %s", address, port);
+ logger(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;
}
-void sockaddr2str(const 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_UNKNOWN) {
- *addrstr = xstrdup(sa->unknown.address);
- *portstr = xstrdup(sa->unknown.port);
+ 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);
if(err) {
- logger(LOG_ERR, _("Error while translating addresses: %s"),
- gai_strerror(err));
- cp_trace();
- raise(SIGFPE);
- exit(0);
+ logger(LOG_ERR, "Error while translating addresses: %s",
+ gai_strerror(err));
+ abort();
}
scopeid = strchr(address, '%');
- if(scopeid)
- *scopeid = '\0'; /* Descope. */
+ if(scopeid) {
+ *scopeid = '\0'; /* Descope. */
+ }
- *addrstr = xstrdup(address);
- *portstr = xstrdup(port);
+ if(addrstr) {
+ *addrstr = xstrdup(address);
+ }
+
+ if(portstr) {
+ *portstr = xstrdup(port);
+ }
}
-char *sockaddr2hostname(const 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_UNKNOWN) {
- xasprintf(&str, _("%s port %s"), sa->unknown.address, sa->unknown.port);
+ 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),
- hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
+ hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
+
if(err) {
- logger(LOG_ERR, _("Error while looking up hostname: %s"),
- gai_strerror(err));
+ logger(LOG_ERR, "Error while looking up hostname: %s",
+ gai_strerror(err));
}
- xasprintf(&str, _("%s port %s"), address, port);
+ xasprintf(&str, "%s port %s", address, port);
return str;
}
-int sockaddrcmp_noport(const sockaddr_t *a, const 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)
+ if(result) {
return result;
+ }
- switch (a->sa.sa_family) {
- case AF_UNSPEC:
- return 0;
+ switch(a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
- case AF_UNKNOWN:
- return strcmp(a->unknown.address, b->unknown.address);
+ case AF_UNKNOWN:
+ return strcmp(a->unknown.address, b->unknown.address);
- case AF_INET:
- return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+ case AF_INET:
+ return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
- case AF_INET6:
- return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
+ case AF_INET6:
+ 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!"),
- a->sa.sa_family);
- cp_trace();
- raise(SIGFPE);
- exit(0);
+ default:
+ logger(LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
}
}
-int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b)
-{
+int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
int result;
- cp();
-
result = a->sa.sa_family - b->sa.sa_family;
- if(result)
+ if(result) {
return result;
+ }
- switch (a->sa.sa_family) {
- case AF_UNSPEC:
- return 0;
+ switch(a->sa.sa_family) {
+ case AF_UNSPEC:
+ return 0;
- case AF_UNKNOWN:
- result = strcmp(a->unknown.address, b->unknown.address);
+ case AF_UNKNOWN:
+ result = strcmp(a->unknown.address, b->unknown.address);
- if(result)
- return result;
+ if(result) {
+ return result;
+ }
- return strcmp(a->unknown.port, b->unknown.port);
+ return strcmp(a->unknown.port, b->unknown.port);
- case AF_INET:
- result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+ case AF_INET:
+ result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
- if(result)
- return result;
+ if(result) {
+ return result;
+ }
- return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
+ return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof(a->in.sin_port));
- case AF_INET6:
- result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
+ case AF_INET6:
+ result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
- if(result)
- return result;
+ if(result) {
+ return result;
+ }
- return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
+ return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
- default:
- logger(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"),
- a->sa.sa_family);
- cp_trace();
- raise(SIGFPE);
- exit(0);
+ default:
+ logger(LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
+ a->sa.sa_family);
+ abort();
}
}
void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
- cp();
-
if(b->sa.sa_family != AF_UNKNOWN) {
*a = *b;
} else {
}
void sockaddrfree(sockaddr_t *a) {
- cp();
-
if(a->sa.sa_family == AF_UNKNOWN) {
free(a->unknown.address);
free(a->unknown.port);
}
}
-
-void sockaddrunmap(sockaddr_t *sa)
-{
- cp();
+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;
}
}
+void sockaddr_setport(sockaddr_t *sa, const char *port) {
+ uint16_t portnum = htons(atoi(port));
+
+ if(!portnum) {
+ return;
+ }
+
+ switch(sa->sa.sa_family) {
+ case AF_INET:
+ sa->in.sin_port = portnum;
+ break;
+
+ case AF_INET6:
+ sa->in6.sin6_port = portnum;
+ break;
+
+ case AF_UNKNOWN:
+ free(sa->unknown.port);
+ sa->unknown.port = xstrdup(port);
+
+ default:
+ return;
+ }
+}
+
/* Subnet mask handling */
-int maskcmp(const void *va, const void *vb, int masklen)
-{
+int maskcmp(const void *va, const void *vb, int masklen) {
int i, m, result;
const char *a = va;
const char *b = vb;
- cp();
-
for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
result = a[i] - b[i];
- if(result)
+
+ if(result) {
return result;
+ }
}
if(m)
return (a[i] & (0x100 - (1 << (8 - m)))) -
- (b[i] & (0x100 - (1 << (8 - m))));
+ (b[i] & (0x100 - (1 << (8 - m))));
return 0;
}
-void mask(void *va, int masklen, int len)
-{
+void mask(void *va, int masklen, int len) {
int i;
char *a = va;
- cp();
-
i = masklen / 8;
masklen %= 8;
- if(masklen)
+ if(masklen) {
a[i++] &= (0x100 - (1 << (8 - masklen)));
+ }
- for(; i < len; i++)
+ for(; i < len; i++) {
a[i] = 0;
+ }
}
-void maskcpy(void *va, const void *vb, int masklen, int len)
-{
+void maskcpy(void *va, const void *vb, int masklen, int len) {
int i, m;
char *a = va;
const char *b = vb;
- cp();
-
- for(m = masklen, i = 0; m >= 8; m -= 8, i++)
+ for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
a[i] = b[i];
+ }
if(m) {
a[i] = b[i] & (0x100 - (1 << (8 - m)));
i++;
}
- for(; i < len; i++)
+ for(; i < len; i++) {
a[i] = 0;
+ }
}
-bool maskcheck(const void *va, int masklen, int len)
-{
+bool maskcheck(const void *va, int masklen, int len) {
int i;
const char *a = va;
- cp();
-
i = masklen / 8;
masklen %= 8;
- if(masklen && a[i++] & (0xff >> masklen))
+ if(masklen && a[i++] & (0xff >> masklen)) {
return false;
+ }
for(; i < len; i++)
- if(a[i] != 0)
+ if(a[i] != 0) {
return false;
+ }
return true;
}
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