#include "inspstring.h"
#include "helperfuncs.h"
#include "socketengine.h"
+#include "wildcard.h"
#include "message.h"
extern InspIRCd* ServerInstance;
extern ServerConfig* Config;
extern time_t TIME;
-extern int openSockfd[MAX_DESCRIPTORS];
-InspSocket* socket_ref[MAX_DESCRIPTORS];
+/* Used when comparing CIDR masks for the modulus bits left over */
-/** This will bind a socket to a port. It works for UDP/TCP.
- * If a hostname is given to bind to, the function will first
- * attempt to resolve the hostname, then bind to the IP the
- * hostname resolves to. This is a blocking lookup blocking for
- * a maximum of one second before it times out, using the DNS
- * server specified in the configuration file.
- */
-bool BindSocket(int sockfd, insp_sockaddr client, insp_sockaddr server, int port, char* addr)
+char inverted_bits[8] = { 0x00, /* 00000000 - 0 bits */
+ 0x80, /* 10000000 - 1 bits */
+ 0xC0, /* 11000000 - 2 bits */
+ 0xE0, /* 11100000 - 3 bits */
+ 0xF0, /* 11110000 - 4 bits */
+ 0xF8, /* 11111000 - 5 bits */
+ 0xFC, /* 11111100 - 6 bits */
+ 0xFE /* 11111110 - 7 bits */
+};
+
+/* Match raw bytes using CIDR bit matching, used by higher level MatchCIDR() */
+bool MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mask_bits)
{
- memset(&server,0,sizeof(server));
- insp_inaddr addy;
- bool resolved = false;
- char resolved_addr[128];
+ unsigned int modulus = mask_bits % 8; /* Number of whole bytes in the mask */
+ unsigned int divisor = mask_bits / 8; /* Remaining bits in the mask after whole bytes are dealt with */
- if (*addr == '*')
- *addr = 0;
+ /* We shouldnt match anything, /0 is always valid */
+ if (!mask_bits)
+ return true;
+
+ /* First compare the whole bytes, if they dont match, return false */
+ if (memcmp(address, mask, divisor))
+ return false;
+
+ /* Now if there are any remainder bits, we compare them with logic AND */
+ if (modulus)
+ if ((address[divisor] & inverted_bits[modulus]) != (mask[divisor] & inverted_bits[modulus]))
+ /* If they dont match, return false */
+ return false;
+
+ /* The address matches the mask, to mask_bits bits of mask */
+ return true;
+}
+
+bool MatchCIDR(const char* address, const char* cidr_mask)
+{
+ return MatchCIDR(address, cidr_mask, false);
+}
+
+/* Match CIDR strings, e.g. 127.0.0.1 to 127.0.0.0/8 or 3ffe:1:5:6::8 to 3ffe:1::0/32
+ * If you have a lot of hosts to match, youre probably better off building your mask once
+ * and then using the lower level MatchCIDRBits directly.
+ */
+bool MatchCIDR(const char* address, const char* cidr_mask, bool match_with_username)
+{
+ unsigned char addr_raw[16];
+ unsigned char mask_raw[16];
+ unsigned int bits = 0;
+ char* mask = NULL;
+
+ /* The caller is trying to match ident@<mask>/bits.
+ * Chop off the ident@ portion, use match() on it
+ * seperately.
+ */
+ if (match_with_username)
+ {
+ /* Duplicate the strings, and try to find the position
+ * of the @ symbol in each */
+ char* address_dupe = strdup(address);
+ char* cidr_dupe = strdup(cidr_mask);
+
+ char* username_mask_pos = strchr(cidr_dupe, '@');
+ char* username_addr_pos = strchr(address_dupe, '@');
+
+ if (username_mask_pos && username_addr_pos)
+ {
+ *username_mask_pos = *username_addr_pos = 0;
+
+ bool result = (match(address_dupe, cidr_dupe) && MatchCIDR(username_addr_pos + 1, username_mask_pos + 1));
+
+ free(address_dupe);
+ free(cidr_dupe);
+
+ return result;
+ }
+ else
+ {
+ free(address_dupe);
+ free(cidr_dupe);
+ mask = strdup(cidr_mask);
+ }
+ }
+ else
+ {
+ mask = strdup(cidr_mask);
+ }
+
+ in_addr address_in4;
+ in_addr mask_in4;
+
+
+ char* bits_chars = strchr(mask,'/');
+
+ if (bits_chars)
+ {
+ bits = atoi(bits_chars + 1);
+ *bits_chars = 0;
+ }
+ else
+ {
+ /* No 'number of bits' field! */
+ return false;
+ }
+
+#ifdef SUPPORT_IP6LINKS
+ in6_addr address_in6;
+ in6_addr mask_in6;
- if (*addr && !inet_aton(addr,&addy))
+ if (inet_pton(AF_INET6, address, &address_in6) > 0)
{
- /* If they gave a hostname, bind to the IP it resolves to */
- if (CleanAndResolve(resolved_addr, addr, true))
+ if (inet_pton(AF_INET6, mask, &mask_in6) > 0)
{
- inet_aton(resolved_addr,&addy);
- log(DEFAULT,"Resolved binding '%s' -> '%s'",addr,resolved_addr);
- server.sin_addr = addy;
- resolved = true;
+ memcpy(&addr_raw, &address_in6.s6_addr, 16);
+ memcpy(&mask_raw, &mask_in6.s6_addr, 16);
+
+ if (bits > 128)
+ bits = 128;
}
else
{
- log(DEFAULT,"WARNING: Could not resolve '%s' to an IP for binding to on port %d",addr,port);
+ free(mask);
return false;
}
}
- server.sin_family = AF_INET;
- if (!resolved)
+ else
+#endif
+ if (inet_pton(AF_INET, address, &address_in4) > 0)
{
- if (!*addr)
+ if (inet_pton(AF_INET, mask, &mask_in4) > 0)
{
- server.sin_addr.s_addr = htonl(INADDR_ANY);
+ memcpy(&addr_raw, &address_in4.s_addr, 4);
+ memcpy(&mask_raw, &mask_in4.s_addr, 4);
+
+ if (bits > 32)
+ bits = 32;
}
else
{
- server.sin_addr = addy;
+ free(mask);
+ return false;
}
}
+ else
+ {
+ free(mask);
+ return false;
+ }
+
+ free(mask);
+ return MatchCIDRBits(addr_raw, mask_raw, bits);
+}
+
+/** This will bind a socket to a port. It works for UDP/TCP.
+ * It can only bind to IP addresses, if you wish to bind to hostnames
+ * you should first resolve them using class 'Resolver'.
+ */
+bool BindSocket(int sockfd, insp_sockaddr client, insp_sockaddr server, int port, char* addr)
+{
+ memset(&server,0,sizeof(server));
+ insp_inaddr addy;
+
+ if (*addr == '*')
+ *addr = 0;
+
+ if ((*addr) && (insp_aton(addr,&addy) < 1))
+ {
+ log(DEBUG,"Invalid IP '%s' given to BindSocket()", addr);
+ return false;;
+ }
+
+#ifdef IPV6
+ server.sin6_family = AF_FAMILY;
+#else
+ server.sin_family = AF_FAMILY;
+#endif
+ if (!*addr)
+ {
+#ifdef IPV6
+ memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
+#else
+ server.sin_addr.s_addr = htonl(INADDR_ANY);
+#endif
+ }
+ else
+ {
+#ifdef IPV6
+ memcpy(&addy, &server.sin6_addr, sizeof(in6_addr));
+#else
+ server.sin_addr = addy;
+#endif
+ }
+#ifdef IPV6
+ server.sin6_port = htons(port);
+#else
server.sin_port = htons(port);
+#endif
if (bind(sockfd,(struct sockaddr*)&server,sizeof(server)) < 0)
{
return false;
int on = 1;
struct linger linger = { 0 };
- if ((sockfd = socket (AF_INET, SOCK_STREAM, 0)) < 0)
+ if ((sockfd = socket (AF_FAMILY, SOCK_STREAM, 0)) < 0)
{
log(DEFAULT,"Error creating TCP socket: %s",strerror(errno));
return (ERROR);
bool HasPort(int port, char* addr)
{
- for (int count = 0; count < ServerInstance->stats->BoundPortCount; count++)
+ for (unsigned long count = 0; count < ServerInstance->stats->BoundPortCount; count++)
{
if ((port == Config->ports[count]) && (!strcasecmp(Config->addrs[count],addr)))
{
{
for (int count = InitialPortCount; count < InitialPortCount + PortCount; count++)
{
- if ((openSockfd[count] = OpenTCPSocket()) == ERROR)
+ if ((Config->openSockfd[count] = OpenTCPSocket()) == ERROR)
{
- log(DEBUG,"Bad fd %d binding port [%s:%d]",openSockfd[count],Config->addrs[count],Config->ports[count]);
+ log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[count],Config->addrs[count],Config->ports[count]);
return ERROR;
}
- if (!BindSocket(openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
+ if (!BindSocket(Config->openSockfd[count],client,server,Config->ports[count],Config->addrs[count]))
{
log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
}
else
{
/* Associate the new open port with a slot in the socket engine */
- ServerInstance->SE->AddFd(openSockfd[count],true,X_LISTEN);
- BoundPortCount++;
+ if (Config->openSockfd[count] > -1)
+ {
+ ServerInstance->SE->AddFd(Config->openSockfd[count],true,X_LISTEN);
+ BoundPortCount++;
+ }
}
}
return InitialPortCount + BoundPortCount;
for (int count = 0; count < PortCount; count++)
{
- if ((openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
+ if ((Config->openSockfd[BoundPortCount] = OpenTCPSocket()) == ERROR)
{
- log(DEBUG,"Bad fd %d binding port [%s:%d]",openSockfd[BoundPortCount],Config->addrs[count],Config->ports[count]);
+ log(DEBUG,"Bad fd %d binding port [%s:%d]",Config->openSockfd[BoundPortCount],Config->addrs[count],Config->ports[count]);
return ERROR;
}
- if (!BindSocket(openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]))
+ if (!BindSocket(Config->openSockfd[BoundPortCount],client,server,Config->ports[count],Config->addrs[count]))
{
log(DEFAULT,"Failed to bind port [%s:%d]: %s",Config->addrs[count],Config->ports[count],strerror(errno));
}
return BoundPortCount;
}
+
+const char* insp_ntoa(insp_inaddr n)
+{
+ static char buf[1024];
+ inet_ntop(AF_FAMILY, &n, buf, sizeof(buf));
+ return buf;
+}
+
+int insp_aton(const char* a, insp_inaddr* n)
+{
+ return inet_pton(AF_FAMILY, a, n);
+}
+
projects / user / henk / code / inspircd.git / blobdiff