r4831: added udp support to our generic sockets library.

I decided to incorporate the udp support into the socket_ipv4.c
backend (and later in socket_ipv6.c) rather than doing a separate
backend, as so much of the code is shareable. Basically this adds a
socket_sendto() and a socket_recvfrom() call and not much all.

For udp servers, I decided to keep the call as socket_listen(), even
though dgram servers don't actually call listen(). This keeps the API
consistent.

I also added a simple local sockets testsuite in smbtorture,
LOCAL-SOCKET
(This used to be commit 9f12a45a05c5c447fb4ec18c8dd28f70e90e32a5)

1 files changed, 134 insertions, 0 deletions

diff --git a/source4/torture/local/socket.c b/source4/torture/local/socket.c
new file mode 100644
index 0000000000..cdd379e934
--- /dev/null
+++ b/source4/torture/local/socket.c
@@ -0,0 +1,134 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   local testing of socket routines.
+
+   Copyright (C) Andrew Tridgell 2005
+   
+   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
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   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.
+*/
+
+#include "includes.h"
+
+#define CHECK_STATUS(status, correct) do { \
+	if (!NT_STATUS_EQUAL(status, correct)) { \
+		printf("(%s) Incorrect status %s - should be %s\n", \
+		       __location__, nt_errstr(status), nt_errstr(correct)); \
+		ret = False; \
+		goto done; \
+	}} while (0)
+
+
+/*
+  basic testing of udp routines
+*/
+static BOOL test_udp(TALLOC_CTX *mem_ctx)
+{
+	struct socket_context *sock1, *sock2;
+	NTSTATUS status;
+	int srv_port, from_port;
+	const char *srv_addr, *from_addr;
+	size_t size = 100 + (random() % 100);
+	DATA_BLOB blob, blob2;
+	size_t sent, nread;
+	BOOL ret = True;
+
+	status = socket_create("ip", SOCKET_TYPE_DGRAM, &sock1, 0);
+	CHECK_STATUS(status, NT_STATUS_OK);
+	talloc_steal(mem_ctx, sock1);
+
+	status = socket_create("ip", SOCKET_TYPE_DGRAM, &sock2, 0);
+	CHECK_STATUS(status, NT_STATUS_OK);
+	talloc_steal(mem_ctx, sock2);
+
+	status = socket_listen(sock1, "127.0.0.1", 0, 0, 0);
+	CHECK_STATUS(status, NT_STATUS_OK);
+
+	srv_addr = socket_get_my_addr(sock1, mem_ctx);
+	if (srv_addr == NULL || strcmp(srv_addr, "127.0.0.1") != 0) {
+		printf("Expected server address of 127.0.0.1 but got %s\n", srv_addr);
+		return False;
+	}
+
+	srv_port = socket_get_my_port(sock1);
+	printf("server port is %d\n", srv_port);
+
+	blob  = data_blob_talloc(mem_ctx, NULL, size);
+	blob2 = data_blob_talloc(mem_ctx, NULL, size);
+	generate_random_buffer(blob.data, blob.length);
+
+	sent = size;
+	status = socket_sendto(sock2, &blob, &sent, 0, srv_addr, srv_port);
+	CHECK_STATUS(status, NT_STATUS_OK);
+
+	status = socket_recvfrom(sock1, blob2.data, size, &nread, 0, 
+				 &from_addr, &from_port);
+	CHECK_STATUS(status, NT_STATUS_OK);
+
+	if (strcmp(from_addr, srv_addr) != 0) {
+		printf("Unexpected recvfrom addr %s\n", from_addr);
+		ret = False;
+	}
+	if (nread != size) {
+		printf("Unexpected recvfrom size %d should be %d\n", nread, size);
+		ret = False;
+	}
+
+	if (memcmp(blob2.data, blob.data, size) != 0) {
+		printf("Bad data in recvfrom\n");
+		ret = False;
+	}
+
+	generate_random_buffer(blob.data, blob.length);
+	status = socket_sendto(sock1, &blob, &sent, 0, from_addr, from_port);
+	CHECK_STATUS(status, NT_STATUS_OK);
+
+	status = socket_recvfrom(sock2, blob2.data, size, &nread, 0, 
+				 &from_addr, &from_port);
+	CHECK_STATUS(status, NT_STATUS_OK);
+	if (strcmp(from_addr, srv_addr) != 0) {
+		printf("Unexpected recvfrom addr %s\n", from_addr);
+		ret = False;
+	}
+	if (nread != size) {
+		printf("Unexpected recvfrom size %d should be %d\n", nread, size);
+		ret = False;
+	}
+	if (from_port != srv_port) {
+		printf("Unexpected recvfrom port %d should be %d\n", 
+		       from_port, srv_port);
+		ret = False;
+	}
+	if (memcmp(blob2.data, blob.data, size) != 0) {
+		printf("Bad data in recvfrom\n");
+		ret = False;
+	}
+
+done:
+	talloc_free(sock1);
+	talloc_free(sock2);
+
+	return ret;
+}
+
+BOOL torture_local_socket(void) 
+{
+	BOOL ret = True;
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	ret &= test_udp(mem_ctx);
+
+	return ret;
+}