changing to use a separate client structure for each udp client

git-svn-id: https://svn.testnett.uninett.no/radsecproxy/trunk@378 e88ac4ed-0b26-0410-9574-a7f39faa03bf

dtls.c

@@ -312,7 +312,6 @@ void *dtlsservernew(void *arg) {
 	    if (client) {
 		client->sock = params->sock;
 		client->rbios = params->sesscache->rbios;
-		client->addr = params->addr;
 		client->ssl = ssl;
 		dtlsserverrd(client);
 		removeclient(client);

radsecproxy.c

@@ -581,6 +581,7 @@ void removeclient(struct client *client) {
 	return;
     removequeue(client->replyq);
     list_removedata(client->conf->clients, client);
+    free(client->addr);
     free(client);
 }
 

radsecproxy.h

@@ -104,7 +104,7 @@ struct client {
     SSL *ssl;
     struct queue *replyq;
     struct queue *rbios; /* for dtls */
-    struct sockaddr_storage addr; /* for dtls */
+    struct sockaddr *addr; /* for udp */
 };
 
 struct server {

udp.c

@@ -42,6 +42,7 @@ unsigned char *radudpget(int s, struct client **client, struct server **server,
     int cnt, len;
     unsigned char buf[4], *rad = NULL;
     struct sockaddr_storage from;
+    struct sockaddr *fromcopy;
     socklen_t fromlen = sizeof(from);
     struct clsrvconf *p;
     struct list_node *node;
@@ -101,10 +102,22 @@ unsigned char *radudpget(int s, struct client **client, struct server **server,
 	    debug(DBG_DBG, "radudpget: packet was padded with %d bytes", cnt - len);
 
 	if (client) {
-	    node = list_first(p->clients);
-	    *client = node ? (struct client *)node->data : addclient(p);
-	    if (!*client)
+	    for (node = list_first(p->clients); node; node = list_next(node))
+		if (addr_equal((struct sockaddr *)&from, ((struct client *)node->data)->addr))
+		    break;
+	    if (node) {
+		*client = (struct client *)node->data;
+		break;
+	    }
+	    fromcopy = addr_copy((struct sockaddr *)&from);
+	    if (!fromcopy)
 		continue;
+	    *client = addclient(p);
+	    if (!*client) {
+		free(fromcopy);
+		continue;
+	    }
+	    (*client)->addr = fromcopy;
 	} else if (server)
 	    *server = p->servers;
 	break;

util.c

@@ -72,6 +72,43 @@ void printfchars(char *prefixfmt, char *prefix, char *charfmt, char *chars, int
     printf("\n");
 }
 
+int addr_equal(struct sockaddr *a, struct sockaddr *b) {
+    switch (a->sa_family) {
+    case AF_INET:
+	return !memcmp(&((struct sockaddr_in*)a)->sin_addr,
+		       &((struct sockaddr_in*)b)->sin_addr,
+		       sizeof(struct in_addr));
+    case AF_INET6:
+	return IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6*)a)->sin6_addr,
+				  &((struct sockaddr_in6*)b)->sin6_addr);
+    default:
+	/* Must not reach */
+	return 0;
+    }
+}
+
+struct sockaddr *addr_copy(struct sockaddr *in) {
+    struct sockaddr *out = NULL;
+    
+    switch (in->sa_family) {
+    case AF_INET:
+	out = malloc(sizeof(struct sockaddr_in));
+	if (out) {
+	    memset(out, 0, sizeof(struct sockaddr_in));
+	    ((struct sockaddr_in *)out)->sin_addr = ((struct sockaddr_in *)in)->sin_addr;
+	}
+	break;
+    case AF_INET6:
+	out = malloc(sizeof(struct sockaddr_in6));
+	if (out) {
+	    memset(out, 0, sizeof(struct sockaddr_in6));
+	    ((struct sockaddr_in6 *)out)->sin6_addr = ((struct sockaddr_in6 *)in)->sin6_addr;
+	}
+	break;
+    }
+    return out;
+}
+
 char *addr2string(struct sockaddr *addr, socklen_t len) {
     struct sockaddr_in6 *sa6;
     struct sockaddr_in sa4;

util.h

@@ -3,5 +3,7 @@
 
 char *stringcopy(const char *s, int len);
 char *addr2string(struct sockaddr *addr, socklen_t len);
+int addr_equal(struct sockaddr *a, struct sockaddr *b);
+struct sockaddr *addr_copy(struct sockaddr *in);
 void printfchars(char *prefixfmt, char *prefix, char *charfmt, char *chars, int len);
 int connectport(int type, char *host, char *port);