Added initial client library implementation.

For now, this includes a network client only.

diff --git a/src/Makefile.am b/src/Makefile.am
index e4695cdac476a4bf1ff779e8296e1db622ef4012..c3eb8cda89f651b74919474a90891ff72f15d70d 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -30,7 +30,18 @@ pkgutilsinclude_HEADERS = \
                include/utils/strbuf.h \
                include/utils/unixsock.h
 
-lib_LTLIBRARIES = libsysdb.la
+pkgclientincludedir = $(pkgincludedir)/client
+pkgclientinclude_HEADERS = \
+               include/client/sock.h
+
+lib_LTLIBRARIES = libsysdbclient.la libsysdb.la
+
+libsysdbclient_la_SOURCES = \
+               client/sock.c include/client/sock.h
+libsysdbclient_la_CFLAGS = $(AM_CFLAGS)
+libsysdbclient_la_CPPFLAGS = $(AM_CPPFLAGS) $(LTDLINCL)
+libsysdbclient_la_LDFLAGS = -version-info 0:0:0 -pthread
+libsysdbclient_la_LIBADD = $(LIBLTDL)
 
 libsysdb_la_SOURCES = \
                sysdb.c include/sysdb.h \

diff --git a/src/client/sock.c b/src/client/sock.c
new file mode 100644 (file)
index 0000000..ffabdc1
--- /dev/null
+++ b/src/client/sock.c
@@ -0,0 +1,223 @@
+/*
+ * SysDB - src/client/sock.c
+ * Copyright (C) 2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "client/sock.h"
+#include "utils/strbuf.h"
+#include "utils/proto.h"
+
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <limits.h>
+
+#include <stdlib.h>
+
+#include <string.h>
+#include <strings.h>
+
+#include <unistd.h>
+
+#include <sys/socket.h>
+#include <sys/un.h>
+
+/*
+ * private data types
+ */
+
+struct sdb_client {
+       char *address;
+       int   fd;
+};
+
+/*
+ * private helper functions
+ */
+
+static int
+connect_unixsock(sdb_client_t *client, const char *address)
+{
+       struct sockaddr_un sa;
+
+       client->fd = socket(AF_UNIX, SOCK_STREAM, /* protocol = */ 0);
+       if (client->fd < 0)
+               return -1;
+
+       sa.sun_family = AF_UNIX;
+       strncpy(sa.sun_path, address, sizeof(sa.sun_path));
+       sa.sun_path[sizeof(sa.sun_path) - 1] = '\0';
+
+       if (connect(client->fd, (struct sockaddr *)&sa, sizeof(sa))) {
+               sdb_client_close(client);
+               return -1;
+       }
+       return client->fd;
+} /* connect_unixsock */
+
+/*
+ * public API
+ */
+
+sdb_client_t *
+sdb_client_create(const char *address)
+{
+       sdb_client_t *client;
+
+       if (! address)
+               return NULL;
+
+       client = malloc(sizeof(*client));
+       if (! client)
+               return NULL;
+       memset(client, 0, sizeof(*client));
+       client->fd = -1;
+
+       client->address = strdup(address);
+       if (! client->address) {
+               sdb_client_destroy(client);
+               return NULL;
+       }
+
+       return client;
+} /* sdb_client_create */
+
+void
+sdb_client_destroy(sdb_client_t *client)
+{
+       if (! client)
+               return;
+
+       sdb_client_close(client);
+
+       if (client->address)
+               free(client->address);
+       client->address = NULL;
+
+       free(client);
+} /* sdb_client_destroy */
+
+int
+sdb_client_connect(sdb_client_t *client)
+{
+       if ((! client) || (! client->address))
+               return -1;
+
+       if (client->fd >= 0)
+               return -1;
+
+       if (!strncasecmp(client->address, "unix:", strlen("unix:")))
+               connect_unixsock(client, client->address + strlen("unix:"));
+       else if (*client->address == '/')
+               connect_unixsock(client, client->address);
+       else
+               return -1;
+
+       if (client->fd < 0)
+               return -1;
+       return 0;
+} /* sdb_client_connect */
+
+void
+sdb_client_close(sdb_client_t *client)
+{
+       if (! client)
+               return;
+
+       close(client->fd);
+       client->fd = -1;
+} /* sdb_client_close */
+
+ssize_t
+sdb_client_send(sdb_client_t *client,
+               uint32_t cmd, uint32_t msg_len, const char *msg)
+{
+       if ((! client) || (! client->fd))
+               return -1;
+
+       return sdb_proto_send_msg(client->fd, cmd, msg_len, msg);
+} /* sdb_client_send */
+
+ssize_t
+sdb_client_recv(sdb_client_t *client,
+               uint32_t *code, sdb_strbuf_t *buf)
+{
+       uint32_t rstatus = UINT32_MAX;
+       uint32_t rlen = UINT32_MAX;
+
+       size_t total = 0;
+       size_t req = 2 * sizeof(uint32_t);
+
+       size_t data_offset = sdb_strbuf_len(buf);
+
+       if ((! client) || (! client->fd) || (! buf)) {
+               errno = EBADF;
+               return -1;
+       }
+
+       if (code)
+               *code = UINT32_MAX;
+
+       while (42) {
+               ssize_t status;
+
+               errno = 0;
+               status = sdb_strbuf_read(buf, client->fd, req);
+               if (status < 0) {
+                       if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
+                               break;
+                       return status;
+               }
+               else if (! status) /* EOF */
+                       break;
+
+               total += (size_t)status;
+
+               if (total != req)
+                       continue;
+
+               if (rstatus == UINT32_MAX) {
+                       /* retrieve status and data len */
+                       rstatus = sdb_proto_get_int(buf, data_offset);
+                       rlen = sdb_proto_get_int(buf, data_offset + sizeof(rstatus));
+
+                       if (! rlen)
+                               break;
+
+                       req = (size_t)rlen;
+                       total = 0;
+               }
+               else /* finished reading data */
+                       break;
+       }
+
+       if (code)
+               *code = rstatus;
+
+       return (ssize_t)total;
+} /* sdb_client_recv */
+
+/* vim: set tw=78 sw=4 ts=4 noexpandtab : */
+

diff --git a/src/include/client/sock.h b/src/include/client/sock.h
new file mode 100644 (file)
index 0000000..5980d08
--- /dev/null
+++ b/src/include/client/sock.h
@@ -0,0 +1,119 @@
+/*
+ * SysDB - src/include/client/sock.h
+ * Copyright (C) 2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef SDB_CLIENT_SOCK_H
+#define SDB_CLIENT_SOCK_H 1
+
+#include "core/object.h"
+#include "core/data.h"
+
+#include "utils/strbuf.h"
+
+#include <sys/socket.h>
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct sdb_client;
+typedef struct sdb_client sdb_client_t;
+
+/*
+ * sdb_client_create:
+ * Allocates and initializes a client object to connect to the specified
+ * address.
+ *
+ * Returns:
+ *  - a new client object on success
+ *  - NULL in case of an error
+ */
+sdb_client_t *
+sdb_client_create(const char *address);
+
+/*
+ * sdb_client_destroy:
+ * Destroyes the client connection and deallocates the client object.
+ */
+void
+sdb_client_destroy(sdb_client_t *client);
+
+/*
+ * sdb_client_connect:
+ * Connect to the client's address.
+ *
+ * Returns:
+ *  - 0 on success
+ *  - a negative value else
+ */
+int
+sdb_client_connect(sdb_client_t *client);
+
+/*
+ * sdb_client_close:
+ * Close the client connection.
+ */
+void
+sdb_client_close(sdb_client_t *client);
+
+/*
+ * sdb_client_send:
+ * Send the specified command and accompanying data to through the client
+ * connection.
+ *
+ * Returns:
+ *  - 0 on success
+ *  - a negative value else.
+ */
+ssize_t
+sdb_client_send(sdb_client_t *client,
+               uint32_t cmd, uint32_t data_len, const char *data);
+
+/*
+ * sdb_client_recv:
+ * Receive data from the connection. All data is written to the specified
+ * buffer. If specified, the returned status code is written to the memory
+ * location pointed to by 'code'. In case of an error or an incomplete
+ * command, the status code is set to UINT32_MAX.
+ *
+ * Returns:
+ *  - the number of bytes read
+ *  - a negative value on error
+ */
+ssize_t
+sdb_client_recv(sdb_client_t *client,
+               uint32_t *code, sdb_strbuf_t *buf);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* ! SDB_CLIENT_SOCK_H */
+
+/* vim: set tw=78 sw=4 ts=4 noexpandtab : */
+