server: ensure payload larger than max is broken into pieces

[fio.git] / server.h

diff --git a/server.h b/server.h
index aed61b2c0b7cf509756ae9f0c29a859c6dc50f38..c85f1bcc36e090431423e9f39f7a143477b5510a 100644 (file)
--- a/server.h
+++ b/server.h
@@ -1,7 +1,90 @@
 #ifndef FIO_SERVER_H
 #define FIO_SERVER_H
 
+#include <inttypes.h>
+#include <string.h>
+#include <endian.h>
+
+/*
+ * On-wire encoding is little endian
+ */
+struct fio_net_cmd {
+       uint16_t version;       /* protocol version */
+       uint16_t opcode;        /* command opcode */
+       uint32_t flags;         /* modifier flags */
+       uint64_t serial;        /* serial number */
+       uint32_t pdu_len;       /* length of post-cmd layload */
+       uint16_t cmd_crc16;     /* cmd checksum */
+       uint16_t pdu_crc16;     /* payload checksum */
+       uint8_t payload[0];     /* payload */
+};
+
+enum {
+       FIO_SERVER_VER          = 1,
+       FIO_SERVER_VER1         = 1,
+
+       FIO_SERVER_MAX_PDU      = 64,
+
+       FIO_NET_CMD_QUIT        = 1,
+       FIO_NET_CMD_JOB         = 2,
+       FIO_NET_CMD_ACK         = 3,
+       FIO_NET_CMD_NAK         = 4,
+       FIO_NET_CMD_TEXT        = 5,
+
+       FIO_NET_CMD_F_MORE      = 1,
+
+       /* crc does not include the crc fields */
+       FIO_NET_CMD_CRC_SZ      = sizeof(struct fio_net_cmd) -
+                                       2 * sizeof(uint16_t),
+};
+
 extern int fio_server(void);
+extern int fio_server_text_output(const char *, unsigned int len);
+extern int fio_server_log(const char *format, ...);
+extern int fio_net_send_cmd(int, uint16_t, const char *, off_t);
+
+extern int fio_client_connect(const char *);
+extern int fio_client_send_ini(const char *);
+extern int fio_handle_clients(void);
+
+extern int fio_recv_data(int sk, void *p, unsigned int len);
+extern int fio_send_data(int sk, const void *p, unsigned int len);
+extern void fio_net_cmd_crc(struct fio_net_cmd *);
+extern struct fio_net_cmd *fio_net_cmd_read(int sk);
+
 extern int exit_backend;
+extern int fio_net_port;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define le16_to_cpu(x)         (x)
+#define le32_to_cpu(x)         (x)
+#define le64_to_cpu(x)         (x)
+#define cpu_to_le16(x)         (x)
+#define cpu_to_le32(x)         (x)
+#define cpu_to_le64(x)         (x)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define le16_to_cpu(x)         __bswap_16(x)
+#define le32_to_cpu(x)         __bswap_32(x)
+#define le64_to_cpu(x)         __bswap_64(x)
+#define cpu_to_le16(x)         __bswap_16(x)
+#define cpu_to_le32(x)         __bswap_32(x)
+#define cpu_to_le64(x)         __bswap_64(x)
+#else
+#error "Endianness not detected"
+#endif
+
+static inline void fio_init_net_cmd(struct fio_net_cmd *cmd, uint16_t opcode,
+                                   const void *pdu, uint32_t pdu_len)
+{
+       memset(cmd, 0, sizeof(*cmd));
+
+       cmd->version    = cpu_to_le16(FIO_SERVER_VER1);
+       cmd->opcode     = cpu_to_le16(opcode);
+
+       if (pdu) {
+               cmd->pdu_len    = cpu_to_le32(pdu_len);
+               memcpy(&cmd->payload, pdu, pdu_len);
+       }
+}
 
 #endif