-/**
- * @brief IPV4 network in CIDR notation.
- */
-struct IPv4NetworkSet
-{
- /**
- * IPv4 address.
- */
- struct in_addr network;
-
- /**
- * IPv4 netmask.
- */
- struct in_addr netmask;
-};
-
-/**
- * @brief network in CIDR notation for IPV6.
- */
-struct IPv6NetworkSet
-{
- /**
- * IPv6 address.
- */
- struct in6_addr network;
-
- /**
- * IPv6 netmask.
- */
- struct in6_addr netmask;
-};
-
-
-/**
- * Parse a network specification. The argument specifies
- * a list of networks. The format is
- * <tt>[network/netmask;]*</tt> (no whitespace, must be terminated
- * with a semicolon). The network must be given in dotted-decimal
- * notation. The netmask can be given in CIDR notation (/16) or
- * in dotted-decimal (/255.255.0.0).
- *
- * @param routeList a string specifying the forbidden networks
- * @return the converted list, NULL if the synatx is flawed
- */
-static struct IPv4NetworkSet *
-parse_ipv4_specification (const char *routeList)
-{
- unsigned int count;
- unsigned int i;
- unsigned int j;
- unsigned int len;
- int cnt;
- unsigned int pos;
- unsigned int temps[8];
- int slash;
- struct IPv4NetworkSet *result;
-
- if (NULL == routeList)
- return NULL;
- len = strlen (routeList);
- if (0 == len)
- return NULL;
- count = 0;
- for (i = 0; i < len; i++)
- if (routeList[i] == ';')
- count++;
- result = GNUNET_malloc (sizeof (struct IPv4NetworkSet) * (count + 1));
- i = 0;
- pos = 0;
- while (i < count)
- {
- cnt =
- SSCANF (&routeList[pos], "%u.%u.%u.%u/%u.%u.%u.%u;", &temps[0],
- &temps[1], &temps[2], &temps[3], &temps[4], &temps[5],
- &temps[6], &temps[7]);
- if (8 == cnt)
- {
- for (j = 0; j < 8; j++)
- if (temps[j] > 0xFF)
- {
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid format for IP: `%s'\n"),
- &routeList[pos]);
- GNUNET_free (result);
- return NULL;
- }
- result[i].network.s_addr =
- htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
- temps[3]);
- result[i].netmask.s_addr =
- htonl ((temps[4] << 24) + (temps[5] << 16) + (temps[6] << 8) +
- temps[7]);
- while (routeList[pos] != ';')
- pos++;
- pos++;
- i++;
- continue;
- }
- /* try second notation */
- cnt =
- SSCANF (&routeList[pos], "%u.%u.%u.%u/%u;", &temps[0], &temps[1],
- &temps[2], &temps[3], &slash);
- if (5 == cnt)
- {
- for (j = 0; j < 4; j++)
- if (temps[j] > 0xFF)
- {
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid format for IP: `%s'\n"),
- &routeList[pos]);
- GNUNET_free (result);
- return NULL;
- }
- result[i].network.s_addr =
- htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
- temps[3]);
- if ((slash <= 32) && (slash >= 0))
- {
- result[i].netmask.s_addr = 0;
- while (slash > 0)
- {
- result[i].netmask.s_addr =
- (result[i].netmask.s_addr >> 1) + 0x80000000;
- slash--;
- }
- result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
- while (';' != routeList[pos])
- pos++;
- pos++;
- i++;
- continue;
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _("Invalid network notation ('/%d' is not legal in IPv4 CIDR)."),
- slash);
- GNUNET_free (result);
- return NULL; /* error */
- }
- }
- /* try third notation */
- slash = 32;
- cnt =
- SSCANF (&routeList[pos], "%u.%u.%u.%u;", &temps[0], &temps[1],
- &temps[2], &temps[3]);
- if (4 == cnt)
- {
- for (j = 0; j < 4; j++)
- if (temps[j] > 0xFF)
- {
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid format for IP: `%s'\n"),
- &routeList[pos]);
- GNUNET_free (result);
- return NULL;
- }
- result[i].network.s_addr =
- htonl ((temps[0] << 24) + (temps[1] << 16) + (temps[2] << 8) +
- temps[3]);
- result[i].netmask.s_addr = 0;
- while (slash > 0)
- {
- result[i].netmask.s_addr = (result[i].netmask.s_addr >> 1) + 0x80000000;
- slash--;
- }
- result[i].netmask.s_addr = htonl (result[i].netmask.s_addr);
- while (routeList[pos] != ';')
- pos++;
- pos++;
- i++;
- continue;
- }
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid format for IP: `%s'\n"),
- &routeList[pos]);
- GNUNET_free (result);
- return NULL; /* error */
- }
- if (pos < strlen (routeList))
- {
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Invalid format for IP: `%s'\n"),
- &routeList[pos]);
- GNUNET_free (result);
- return NULL; /* oops */
- }
- return result; /* ok */
-}
-
-
-/**
- * Parse a network specification. The argument specifies
- * a list of networks. The format is
- * <tt>[network/netmask;]*</tt> (no whitespace, must be terminated
- * with a semicolon). The network must be given in colon-hex
- * notation. The netmask must be given in CIDR notation (/16) or
- * can be omitted to specify a single host.
- *
- * @param routeListX a string specifying the forbidden networks
- * @return the converted list, NULL if the synatx is flawed
- */
-static struct IPv6NetworkSet *
-parse_ipv6_specification (const char *routeListX)
-{
- unsigned int count;
- unsigned int i;
- unsigned int len;
- unsigned int pos;
- int start;
- int slash;
- int ret;
- char *routeList;
- struct IPv6NetworkSet *result;
- unsigned int bits;
- unsigned int off;
- int save;
-
- if (NULL == routeListX)
- return NULL;
- len = strlen (routeListX);
- if (0 == len)
- return NULL;
- routeList = GNUNET_strdup (routeListX);
- count = 0;
- for (i = 0; i < len; i++)
- if (';' == routeList[i])
- count++;
- if (';' != routeList[len - 1])
- {
- LOG (GNUNET_ERROR_TYPE_ERROR,
- _("Invalid network notation (does not end with ';': `%s')\n"),
- routeList);
- GNUNET_free (routeList);
- return NULL;
- }
-
- result = GNUNET_malloc (sizeof (struct IPv6NetworkSet) * (count + 1));
- i = 0;
- pos = 0;
- while (i < count)
- {
- start = pos;
- while (';' != routeList[pos])
- pos++;
- slash = pos;
- while ((slash >= start) && (routeList[slash] != '/'))
- slash--;
- if (slash < start)
- {
- memset (&result[i].netmask, 0xFF, sizeof (struct in6_addr));
- slash = pos;
- }
- else
- {
- routeList[pos] = '\0';
- ret = inet_pton (AF_INET6, &routeList[slash + 1], &result[i].netmask);
- if (ret <= 0)
- {
- save = errno;
- if ((1 != SSCANF (&routeList[slash + 1], "%u", &bits)) || (bits >= 128))
- {
- if (0 == ret)
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Wrong format `%s' for netmask\n"),
- &routeList[slash + 1]);
- else
- {
- errno = save;
- LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "inet_pton");
- }
- GNUNET_free (result);
- GNUNET_free (routeList);
- return NULL;
- }
- off = 0;
- while (bits > 8)
- {
- result[i].netmask.s6_addr[off++] = 0xFF;
- bits -= 8;
- }
- while (bits > 0)
- {
- result[i].netmask.s6_addr[off] =
- (result[i].netmask.s6_addr[off] >> 1) + 0x80;
- bits--;
- }
- }
- }
- routeList[slash] = '\0';
- ret = inet_pton (AF_INET6, &routeList[start], &result[i].network);
- if (ret <= 0)
- {
- if (0 == ret)
- LOG (GNUNET_ERROR_TYPE_ERROR, _("Wrong format `%s' for network\n"),
- &routeList[slash + 1]);
- else
- LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "inet_pton");
- GNUNET_free (result);
- GNUNET_free (routeList);
- return NULL;
- }
- pos++;
- i++;
- }
- GNUNET_free (routeList);
- return result;
-}
-
-
projects / oweals / gnunet.git / blobdiff