along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: netutl.c,v 1.12.4.23 2002/02/11 10:16:18 guus Exp $
+ $Id: netutl.c,v 1.12.4.38 2002/06/08 12:57:10 guus Exp $
*/
#include "config.h"
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
+#ifndef HAVE_STDINT_H
+ #include <stdint.h>
+#endif
#include <string.h>
+#include <signal.h>
#include <sys/socket.h>
#include <syslog.h>
#include <arpa/inet.h>
#include "system.h"
-char *hostlookup(unsigned long addr)
+int hostnames = 0;
+
+/*
+ Turn a string into a struct addrinfo.
+ Return NULL on failure.
+*/
+struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
{
- char *name;
- struct hostent *host = NULL;
- struct in_addr in;
- int lookup_hostname = 0;
+ struct addrinfo hint, *ai;
+ int err;
cp
- in.s_addr = addr;
-
- get_config_bool(lookup_config(config_tree, "Hostnames"), &lookup_hostname);
+ memset(&hint, 0, sizeof(hint));
- if(lookup_hostname)
- host = gethostbyaddr((char *)&in, sizeof(in), AF_INET);
+ hint.ai_family = addressfamily;
+ hint.ai_socktype = socktype;
- if(!lookup_hostname || !host)
+ if((err = getaddrinfo(address, service, &hint, &ai)))
{
- asprintf(&name, "%s", inet_ntoa(in));
+ if(debug_lvl >= DEBUG_ERROR)
+ syslog(LOG_WARNING, _("Error looking up %s port %s: %s\n"), address, service, gai_strerror(err));
+ cp_trace();
+ return NULL;
}
- else
+
+cp
+ return ai;
+}
+
+sockaddr_t str2sockaddr(char *address, char *port)
+{
+ struct addrinfo hint, *ai;
+ sockaddr_t result;
+ int err;
+cp
+ memset(&hint, 0, sizeof(hint));
+
+ hint.ai_family = AF_UNSPEC;
+ hint.ai_flags = AI_NUMERICHOST;
+ hint.ai_socktype = SOCK_STREAM;
+
+ if((err = getaddrinfo(address, port, &hint, &ai) || !ai))
{
- asprintf(&name, "%s", host->h_name);
+ syslog(LOG_ERR, _("Error looking up %s port %s: %s\n"), address, port, gai_strerror(err));
+ cp_trace();
+ raise(SIGFPE);
+ exit(0);
}
+
+ result = *(sockaddr_t *)ai->ai_addr;
+ freeaddrinfo(ai);
cp
- return name;
+ return result;
}
-/*
- Turn a string into an IP address
- return NULL on failure
- Should support IPv6 and other stuff in the future.
-*/
-ipv4_t str2address(char *str)
+void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
{
- ipv4_t address;
- struct hostent *h;
+ char address[NI_MAXHOST];
+ char port[NI_MAXSERV];
+ char *scopeid;
+ int err;
cp
- if(!(h = gethostbyname(str)))
+ if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST|NI_NUMERICSERV)))
{
- if(debug_lvl >= DEBUG_ERROR)
- syslog(LOG_WARNING, _("Error looking up `%s': %s\n"), str, strerror(errno));
-
- return 0;
+ syslog(LOG_ERR, _("Error while translating addresses: %s"), gai_strerror(err));
+ cp_trace();
+ raise(SIGFPE);
+ exit(0);
}
- address = ntohl(*((ipv4_t*)(h->h_addr_list[0])));
+ if((scopeid = strchr(address, '%')))
+ *scopeid = '\0'; /* Descope. */
+
+ *addrstr = xstrdup(address);
+ *portstr = xstrdup(port);
cp
- return address;
}
-char *address2str(ipv4_t address)
+char *sockaddr2hostname(sockaddr_t *sa)
{
char *str;
+ char address[NI_MAXHOST] = "unknown";
+ char port[NI_MAXSERV] = "unknown";
+ int err;
cp
- asprintf(&str, "%hu.%hu.%hu.%hu",
- (unsigned short int)((address >> 24) & 255),
- (unsigned short int)((address >> 16) & 255),
- (unsigned short int)((address >> 8) & 255),
- (unsigned short int)(address & 255));
+ if((err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), hostnames?0:(NI_NUMERICHOST|NI_NUMERICSERV))))
+ {
+ syslog(LOG_ERR, _("Error while looking up hostname: %s"), gai_strerror(err));
+ }
+
+ asprintf(&str, _("%s port %s"), address, port);
cp
return str;
}
+
+int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
+{
+ int result;
+cp
+ result = a->sa.sa_family - b->sa.sa_family;
+
+ if(result)
+ return result;
+
+ switch(a->sa.sa_family)
+ {
+ case AF_UNSPEC:
+ return 0;
+ case AF_INET:
+ result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
+ if(result)
+ return result;
+ 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));
+ if(result)
+ return result;
+ return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a->in6.sin6_port));
+ default:
+ syslog(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"), a->sa.sa_family);
+ cp_trace();
+ raise(SIGFPE);
+ exit(0);
+ }
+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;
+ }
+}
+
+/* Subnet mask handling */
+
+int maskcmp(void *va, void *vb, int masklen, int len)
+{
+ int i, m, result;
+ char *a = va;
+ char *b = vb;
+cp
+ for(m = masklen, i = 0; m >= 8; m -= 8, i++)
+ if((result = a[i] - b[i]))
+ return result;
+
+ if(m)
+ return (a[i] & (0x100 - (1 << (8 - m)))) - (b[i] & (0x100 - (1 << (8 - m))));
+
+ return 0;
+}
+
+void mask(void *va, int masklen, int len)
+{
+ int i;
+ char *a = va;
+cp
+ i = masklen / 8;
+ masklen %= 8;
+
+ if(masklen)
+ a[i++] &= (0x100 - (1 << masklen));
+
+ for(; i < len; i++)
+ a[i] = 0;
+}
+
+void maskcpy(void *va, void *vb, int masklen, int len)
+{
+ int i, m;
+ char *a = va;
+ char *b = vb;
+cp
+ for(m = masklen, i = 0; m >= 8; m -= 8, i++)
+ a[i] = b[i];
+
+ if(m)
+ {
+ a[i] = b[i] & (0x100 - (1 << m));
+ i++;
+ }
+
+ 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(a[i++] & (0xff >> masklen))
+ return -1;
+
+ for(; i < len; i++)
+ if(a[i] != 0)
+ return -2;
+
+ return 0;
+}
projects / tinc / blobdiff