/*
 * Copyright (c) 2013-2015 Intel Corporation.  All rights reserved.
 * Copyright (c) 2014-2016, Cisco Systems, Inc. All rights reserved.
 * Copyright (c) 2015 Los Alamos Nat. Security, LLC. All rights reserved.
 * Copyright (c) 2016 Cray Inc.  All rights reserved.
 *
 * This software is available to you under the BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - 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.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <config.h>

#include <time.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <assert.h>
#include <getopt.h>
#include <inttypes.h>
#include <netdb.h>
#include <poll.h>
#include <limits.h>

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>

#include <ofi_mem.h>
#include <rdma/fabric.h>
#include <rdma/fi_cm.h>
#include <rdma/fi_domain.h>
#include <rdma/fi_endpoint.h>
#include <rdma/fi_eq.h>
#include <rdma/fi_errno.h>
#include <rdma/fi_tagged.h>

#ifndef OFI_MR_BASIC_MAP
#define OFI_MR_BASIC_MAP (FI_MR_ALLOCATED | FI_MR_PROV_KEY | FI_MR_VIRT_ADDR)
#endif

static const uint64_t TAG = 1234;

enum precision {
	NANO = 1,
	MICRO = 1000,
	MILLI = 1000000,
};

enum {
	PP_OPT_ACTIVE = 1 << 0,
	PP_OPT_ITER = 1 << 1,
	PP_OPT_SIZE = 1 << 2,
	PP_OPT_VERIFY_DATA = 1 << 3,
};

struct pp_opts {
	uint16_t src_port;
	uint16_t dst_port;
	char *dst_addr;
	int iterations;
	int transfer_size;
	int sizes_enabled;
	int options;
};

#define PP_SIZE_MAX_POWER_TWO 22
#define PP_MAX_DATA_MSG                                                        \
	((1 << PP_SIZE_MAX_POWER_TWO) + (1 << (PP_SIZE_MAX_POWER_TWO - 1)))

#define PP_STR_LEN 32
#define PP_MAX_CTRL_MSG 64
#define PP_CTRL_BUF_LEN 64
#define PP_MR_KEY 0xC0DE

#define INTEG_SEED 7
#define PP_ENABLE_ALL (~0)
#define PP_DEFAULT_SIZE (1 << 0)

#define PP_MSG_CHECK_PORT_OK "port ok"
#define PP_MSG_LEN_PORT 5
#define PP_MSG_CHECK_CNT_OK "cnt ok"
#define PP_MSG_LEN_CNT 10
#define PP_MSG_SYNC_Q "q"
#define PP_MSG_SYNC_A "a"

#define PP_PRINTERR(call, retv)                                                \
	fprintf(stderr, "%s(): %s:%-4d, ret=%d (%s)\n", call, __FILE__,        \
		__LINE__, (int)retv, fi_strerror((int) -retv))

#define PP_ERR(fmt, ...)                                                       \
	fprintf(stderr, "[%s] %s:%-4d: " fmt "\n", "error", __FILE__,          \
		__LINE__, ##__VA_ARGS__)

int pp_debug;

#define PP_DEBUG(fmt, ...)                                                     \
	do {                                                                   \
		if (pp_debug) {                                                \
			fprintf(stderr, "[%s] %s:%-4d: " fmt, "debug",         \
				__FILE__, __LINE__, ##__VA_ARGS__);            \
		}                                                              \
	} while (0)

#define PP_CLOSE_FID(fd)                                                       \
	do {                                                                   \
		int ret;                                                       \
		if ((fd)) {                                                    \
			ret = fi_close(&(fd)->fid);                            \
			if (ret)                                               \
				PP_ERR("fi_close (%d) fid %d", ret,            \
				       (int)(fd)->fid.fclass);                 \
			fd = NULL;                                             \
		}                                                              \
	} while (0)

#ifndef MAX
#define MAX(a, b)                                                              \
	({                                                                     \
		typeof(a) _a = (a);                                            \
		typeof(b) _b = (b);                                            \
		_a > _b ? _a : _b;                                             \
	})
#endif

#ifndef MIN
#define MIN(a, b)                                                              \
	({                                                                     \
		typeof(a) _a = (a);                                            \
		typeof(b) _b = (b);                                            \
		_a < _b ? _a : _b;                                             \
	})
#endif

struct ct_pingpong {
	struct fi_info *fi_pep, *fi, *hints;
	struct fid_fabric *fabric;
	struct fid_domain *domain;
	struct fid_pep *pep;
	struct fid_ep *ep;
	struct fid_cq *txcq, *rxcq;
	struct fid_mr *mr;
	struct fid_av *av;
	struct fid_eq *eq;

	struct fid_mr no_mr;
	void *tx_ctx_ptr, *rx_ctx_ptr;
	struct fi_context tx_ctx[2], rx_ctx[2];
	uint64_t remote_cq_data;

	uint64_t tx_seq, rx_seq, tx_cq_cntr, rx_cq_cntr;

	fi_addr_t local_fi_addr, remote_fi_addr;
	void *buf, *tx_buf, *rx_buf;
	size_t buf_size, tx_size, rx_size;
	size_t rx_prefix_size, tx_prefix_size;

	int timeout_sec;
	uint64_t start, end;

	struct fi_av_attr av_attr;
	struct fi_eq_attr eq_attr;
	struct fi_cq_attr cq_attr;
	struct pp_opts opts;

	long cnt_ack_msg;

	SOCKET ctrl_connfd;
	char ctrl_buf[PP_CTRL_BUF_LEN + 1];

	void *local_name, *rem_name;
};

static const char integ_alphabet[] =
	"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
/* Size does not include trailing new line */
static const int integ_alphabet_length =
	(sizeof(integ_alphabet) / sizeof(*integ_alphabet)) - 1;

/*******************************************************************************
 *                                         Utils
 ******************************************************************************/

static uint64_t pp_gettime_us(void)
{
	struct timeval now;

	gettimeofday(&now, NULL);
	return now.tv_sec * 1000000 + now.tv_usec;
}

static long parse_ulong(char *str, long max)
{
	long ret;
	char *end;

	errno = 0;
	ret = strtol(str, &end, 10);
	if (*end != '\0' || errno != 0) {
		if (errno == 0)
			ret = -EINVAL;
		else
			ret = -errno;
		fprintf(stderr, "Error parsing \"%s\": %s\n", str,
			strerror(-ret));
		return ret;
	}

	if ((ret < 0) || (max > 0 && ret > max)) {
		ret = -ERANGE;
		fprintf(stderr, "Error parsing \"%s\": %s\n", str,
			strerror(-ret));
		return ret;
	}
	return ret;
}

static void pp_banner_fabric_info(struct ct_pingpong *ct)
{
	PP_DEBUG("Running pingpong test with fi_info:\n%s\n",
		 fi_tostr(ct->fi, FI_TYPE_INFO));
}

static void pp_banner_options(struct ct_pingpong *ct)
{
	char size_msg[50];
	char iter_msg[50];
	struct pp_opts opts = ct->opts;

	if ((opts.dst_addr == NULL) || (opts.dst_addr[0] == '\0'))
		opts.dst_addr = "None";

	if (opts.sizes_enabled == PP_ENABLE_ALL)
		snprintf(size_msg, 50, "%s", "All sizes");
	else if (opts.options & PP_OPT_SIZE)
		snprintf(size_msg, 50, "selected size = %d",
			 opts.transfer_size);
	else
		snprintf(size_msg, 50, "default size = %d",
			 opts.transfer_size);

	if (opts.options & PP_OPT_ITER)
		snprintf(iter_msg, 50, "selected iterations: %d",
			 opts.iterations);
	else {
		snprintf(iter_msg, 50, "default iterations: %d",
			 opts.iterations);
	}

	PP_DEBUG(" * PingPong options:\n");
	PP_DEBUG("  - %-20s: [%" PRIu16 "]\n", "src_port", opts.src_port);
	PP_DEBUG("  - %-20s: [%s]\n", "dst_addr", opts.dst_addr);
	PP_DEBUG("  - %-20s: [%" PRIu16 "]\n", "dst_port", opts.dst_port);
	PP_DEBUG("  - %-20s: %s\n", "sizes_enabled", size_msg);
	PP_DEBUG("  - %-20s: %s\n", "iterations", iter_msg);
	if (ct->hints->fabric_attr->prov_name)
		PP_DEBUG("  - %-20s: %s\n", "provider",
			  ct->hints->fabric_attr->prov_name);
	if (ct->hints->domain_attr->name)
		PP_DEBUG("  - %-20s: %s\n", "domain",
			  ct->hints->domain_attr->name);
}

/*******************************************************************************
 *                                         Control Messaging
 ******************************************************************************/

static int pp_getaddrinfo(char *name, uint16_t port, struct addrinfo **results)
{
	int ret;
	const char *err_msg;
	char port_s[6];

	struct addrinfo hints = {
	    .ai_family = AF_INET,       /* IPv4 */
	    .ai_socktype = SOCK_STREAM, /* TCP socket */
	    .ai_protocol = IPPROTO_TCP, /* Any protocol */
	    .ai_flags = AI_NUMERICSERV /* numeric port is used */
	};

	snprintf(port_s, 6, "%" PRIu16, port);

	ret = getaddrinfo(name, port_s, &hints, results);
	if (ret != 0) {
		err_msg = gai_strerror(ret);
		PP_ERR("getaddrinfo : %s", err_msg);
		ret = -EXIT_FAILURE;
		goto out;
	}
	ret = EXIT_SUCCESS;

out:
	return ret;
}

static int pp_ctrl_init_client(struct ct_pingpong *ct)
{
	struct sockaddr_in in_addr = {0};
	struct addrinfo *results;
	struct addrinfo *rp;
	int errno_save = 0;
	int ret;

	ret = pp_getaddrinfo(ct->opts.dst_addr, ct->opts.dst_port, &results);
	if (ret)
		return ret;

	if (!results) {
		PP_ERR("getaddrinfo returned NULL list");
		return -EXIT_FAILURE;
	}

	for (rp = results; rp; rp = rp->ai_next) {
		ct->ctrl_connfd = ofi_socket(rp->ai_family, rp->ai_socktype,
					     rp->ai_protocol);
		if (ct->ctrl_connfd == INVALID_SOCKET) {
			errno_save = ofi_sockerr();
			continue;
		}

		if (ct->opts.src_port != 0) {
			in_addr.sin_family = AF_INET;
			in_addr.sin_port = htons(ct->opts.src_port);
			in_addr.sin_addr.s_addr = htonl(INADDR_ANY);

			ret =
			    bind(ct->ctrl_connfd, (struct sockaddr *)&in_addr,
				 sizeof(in_addr));
			if (ret == -1) {
				errno_save = ofi_sockerr();
				ofi_close_socket(ct->ctrl_connfd);
				continue;
			}
		}

		ret = connect(ct->ctrl_connfd, rp->ai_addr, rp->ai_addrlen);
		if (ret != -1)
			break;

		errno_save = ofi_sockerr();
		ofi_close_socket(ct->ctrl_connfd);
	}

	if (!rp || ret == -1) {
		ret = -errno_save;
		ct->ctrl_connfd = -1;
		PP_ERR("failed to connect: %s", strerror(errno_save));
	} else {
		PP_DEBUG("CLIENT: connected\n");
	}

	freeaddrinfo(results);

	return ret;
}

static int pp_ctrl_init_server(struct ct_pingpong *ct)
{
	struct sockaddr_in ctrl_addr = {0};
	int optval = 1;
	SOCKET listenfd;
	int ret;

	listenfd = ofi_socket(AF_INET, SOCK_STREAM, 0);
	if (listenfd == INVALID_SOCKET) {
		ret = -ofi_sockerr();
		PP_PRINTERR("socket", ret);
		return ret;
	}

	ret = setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR,
			 (const char *)&optval, sizeof(optval));
	if (ret == -1) {
		ret = -ofi_sockerr();
		PP_PRINTERR("setsockopt(SO_REUSEADDR)", ret);
		goto fail_close_socket;
	}

	ctrl_addr.sin_family = AF_INET;
	ctrl_addr.sin_port = htons(ct->opts.src_port);
	ctrl_addr.sin_addr.s_addr = htonl(INADDR_ANY);

	ret = bind(listenfd, (struct sockaddr *)&ctrl_addr,
		   sizeof(ctrl_addr));
	if (ret == -1) {
		ret = -ofi_sockerr();
		PP_PRINTERR("bind", ret);
		goto fail_close_socket;
	}

	ret = listen(listenfd, 10);
	if (ret == -1) {
		ret = -ofi_sockerr();
		PP_PRINTERR("listen", ret);
		goto fail_close_socket;
	}

	PP_DEBUG("SERVER: waiting for connection\n");

	ct->ctrl_connfd = accept(listenfd, NULL, NULL);
	if (ct->ctrl_connfd == -1) {
		ret = -ofi_sockerr();
		PP_PRINTERR("accept", ret);
		goto fail_close_socket;
	}

	ofi_close_socket(listenfd);

	PP_DEBUG("SERVER: connected\n");

	return ret;

fail_close_socket:
	if (ct->ctrl_connfd != -1) {
		ofi_close_socket(ct->ctrl_connfd);
		ct->ctrl_connfd = -1;
	}

	if (listenfd != -1)
		ofi_close_socket(listenfd);

	return ret;
}

static int pp_ctrl_init(struct ct_pingpong *ct)
{
	const uint32_t default_ctrl = 47592;
	struct timeval tv = {
		.tv_sec = 5
	};
	int ret;

	PP_DEBUG("Initializing control messages\n");

	if (ct->opts.dst_addr) {
		if (ct->opts.dst_port == 0)
			ct->opts.dst_port = default_ctrl;
		ret = pp_ctrl_init_client(ct);
	} else {
		if (ct->opts.src_port == 0)
			ct->opts.src_port = default_ctrl;
		ret = pp_ctrl_init_server(ct);
	}

	if (ret)
		return ret;

	ret = setsockopt(ct->ctrl_connfd, SOL_SOCKET, SO_RCVTIMEO,
			 (const char *)&tv, sizeof(struct timeval));
	if (ret == -1) {
		ret = -ofi_sockerr();
		PP_PRINTERR("setsockopt(SO_RCVTIMEO)", ret);
		return ret;
	}

	PP_DEBUG("Control messages initialized\n");

	return ret;
}

static int pp_ctrl_send(struct ct_pingpong *ct, char *buf, size_t size)
{
	int ret, err;

	ret = ofi_send_socket(ct->ctrl_connfd, buf, size, 0);
	if (ret < 0) {
		err = -ofi_sockerr();
		PP_PRINTERR("ctrl/send", err);
		return err;
	}
	if (ret == 0) {
		err = -ECONNABORTED;
		PP_ERR("ctrl/read: no data or remote connection closed");
		return err;
	}

	return ret;
}

static int pp_ctrl_recv(struct ct_pingpong *ct, char *buf, size_t size)
{
	int ret, err;

	do {
		PP_DEBUG("receiving\n");
		ret = ofi_read_socket(ct->ctrl_connfd, buf, size);
	} while (ret == -1 && OFI_SOCK_TRY_SND_RCV_AGAIN(ofi_sockerr()));
	if (ret < 0) {
		err = -ofi_sockerr();
		PP_PRINTERR("ctrl/read", err);
		return err;
	}
	if (ret == 0) {
		err = -ECONNABORTED;
		PP_ERR("ctrl/read: no data or remote connection closed");
		return err;
	}

	return ret;
}

static int pp_ctrl_recv_str(struct ct_pingpong *ct, char *buf, size_t size)
{
	int ret;

	ret = pp_ctrl_recv(ct, buf, size);
	buf[size - 1] = '\0';
	return ret;
}

static int pp_send_name(struct ct_pingpong *ct, struct fid *endpoint)
{
	size_t addrlen = 0;
	uint32_t len;
	int ret;

	PP_DEBUG("Fetching local address\n");

	ct->local_name = NULL;

	ret = fi_getname(endpoint, ct->local_name, &addrlen);
	if ((ret != -FI_ETOOSMALL) || (addrlen <= 0)) {
		PP_ERR("fi_getname didn't return length\n");
		return -EMSGSIZE;
	}

	ct->local_name = calloc(1, addrlen);
	if (!ct->local_name) {
		PP_ERR("Failed to allocate memory for the address\n");
		return -ENOMEM;
	}

	ret = fi_getname(endpoint, ct->local_name, &addrlen);
	if (ret) {
		PP_PRINTERR("fi_getname", ret);
		goto fn;
	}

	PP_DEBUG("Sending name length\n");
	len = htonl(addrlen);
	ret = pp_ctrl_send(ct, (char *) &len, sizeof(len));
	if (ret < 0)
		goto fn;

	PP_DEBUG("Sending address format\n");
	if (ct->fi) {
		ret = pp_ctrl_send(ct, (char *) &ct->fi->addr_format,
				   sizeof(ct->fi->addr_format));
	} else {
		ret = pp_ctrl_send(ct, (char *) &ct->fi_pep->addr_format,
				   sizeof(ct->fi_pep->addr_format));

	}
	if (ret < 0)
		goto fn;

	PP_DEBUG("Sending name\n");
	ret = pp_ctrl_send(ct, ct->local_name, addrlen);
	PP_DEBUG("Sent name\n");

fn:
	return ret;
}

static int pp_recv_name(struct ct_pingpong *ct)
{
	uint32_t len;
	int ret;

	PP_DEBUG("Receiving name length\n");
	ret = pp_ctrl_recv(ct, (char *) &len, sizeof(len));
	if (ret < 0)
		return ret;

	len = ntohl(len);

	ct->rem_name = calloc(1, len);
	if (!ct->rem_name) {
		PP_ERR("Failed to allocate memory for the address\n");
		return -ENOMEM;
	}

	PP_DEBUG("Receiving address format\n");
	ret = pp_ctrl_recv(ct, (char *) &ct->hints->addr_format,
			   sizeof(ct->hints->addr_format));
	if (ret < 0)
		return ret;

	PP_DEBUG("Receiving name\n");
	ret = pp_ctrl_recv(ct, ct->rem_name, len);
	if (ret < 0)
		return ret;
	PP_DEBUG("Received name\n");

	ct->hints->dest_addr = calloc(1, len);
	if (!ct->hints->dest_addr) {
		PP_DEBUG("Failed to allocate memory for destination address\n");
		return -ENOMEM;
	}

	/* fi_freeinfo will free the dest_addr field. */
	memcpy(ct->hints->dest_addr, ct->rem_name, len);
	ct->hints->dest_addrlen = len;

	return 0;
}

static int pp_ctrl_finish(struct ct_pingpong *ct)
{
	if (ct->ctrl_connfd != -1) {
		ofi_close_socket(ct->ctrl_connfd);
		ct->ctrl_connfd = -1;
	}

	return 0;
}

static int pp_ctrl_sync(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Syncing nodes\n");

	if (ct->opts.dst_addr) {
		snprintf(ct->ctrl_buf, sizeof(PP_MSG_SYNC_Q), "%s",
			 PP_MSG_SYNC_Q);

		PP_DEBUG("CLIENT: syncing\n");
		ret = pp_ctrl_send(ct, ct->ctrl_buf, sizeof(PP_MSG_SYNC_Q));
		PP_DEBUG("CLIENT: after send / ret=%d\n", ret);
		if (ret < 0)
			return ret;
		if (ret < sizeof(PP_MSG_SYNC_Q)) {
			PP_ERR("CLIENT: bad length of sent data (len=%d/%zu)",
			       ret, sizeof(PP_MSG_SYNC_Q));
			return -EBADMSG;
		}
		PP_DEBUG("CLIENT: syncing now\n");

		ret = pp_ctrl_recv_str(ct, ct->ctrl_buf, sizeof(PP_MSG_SYNC_A));
		PP_DEBUG("CLIENT: after recv / ret=%d\n", ret);
		if (ret < 0)
			return ret;
		if (strcmp(ct->ctrl_buf, PP_MSG_SYNC_A)) {
			PP_DEBUG("CLIENT: sync error while acking A: <%s> "
				 "(len=%zu)\n",
				 ct->ctrl_buf, strlen(ct->ctrl_buf));
			return -EBADMSG;
		}
		PP_DEBUG("CLIENT: synced\n");
	} else {
		PP_DEBUG("SERVER: syncing\n");
		ret = pp_ctrl_recv_str(ct, ct->ctrl_buf, sizeof(PP_MSG_SYNC_Q));
		PP_DEBUG("SERVER: after recv / ret=%d\n", ret);
		if (ret < 0)
			return ret;
		if (strcmp(ct->ctrl_buf, PP_MSG_SYNC_Q)) {
			PP_DEBUG("SERVER: sync error while acking Q: <%s> "
				 "(len=%zu)\n",
				 ct->ctrl_buf, strlen(ct->ctrl_buf));
			return -EBADMSG;
		}

		PP_DEBUG("SERVER: syncing now\n");
		snprintf(ct->ctrl_buf, sizeof(PP_MSG_SYNC_A), "%s",
			 PP_MSG_SYNC_A);

		ret = pp_ctrl_send(ct, ct->ctrl_buf, sizeof(PP_MSG_SYNC_A));
		PP_DEBUG("SERVER: after send / ret=%d\n", ret);
		if (ret < 0)
			return ret;
		if (ret < sizeof(PP_MSG_SYNC_A)) {
			PP_ERR("SERVER: bad length of sent data (len=%d/%zu)",
			       ret, sizeof(PP_MSG_SYNC_A));
			return -EBADMSG;
		}
		PP_DEBUG("SERVER: synced\n");
	}

	PP_DEBUG("Nodes synced\n");

	return 0;
}

static int pp_ctrl_txrx_msg_count(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Exchanging ack count\n");

	if (ct->opts.dst_addr) {
		memset(&ct->ctrl_buf, '\0', PP_MSG_LEN_CNT + 1);
		snprintf(ct->ctrl_buf, PP_MSG_LEN_CNT + 1, "%ld",
			 ct->cnt_ack_msg);

		PP_DEBUG("CLIENT: sending count = <%s> (len=%zu)\n",
			 ct->ctrl_buf, strlen(ct->ctrl_buf));
		ret = pp_ctrl_send(ct, ct->ctrl_buf, PP_MSG_LEN_CNT);
		if (ret < 0)
			return ret;
		if (ret < PP_MSG_LEN_CNT) {
			PP_ERR("CLIENT: bad length of sent data (len=%d/%d)",
			       ret, PP_MSG_LEN_CNT);
			return -EBADMSG;
		}
		PP_DEBUG("CLIENT: sent count\n");

		ret = pp_ctrl_recv_str(ct, ct->ctrl_buf,
				       sizeof(PP_MSG_CHECK_CNT_OK));
		if (ret < 0)
			return ret;
		if (ret < sizeof(PP_MSG_CHECK_CNT_OK)) {
			PP_ERR(
			    "CLIENT: bad length of received data (len=%d/%zu)",
			    ret, sizeof(PP_MSG_CHECK_CNT_OK));
			return -EBADMSG;
		}

		if (strcmp(ct->ctrl_buf, PP_MSG_CHECK_CNT_OK)) {
			PP_DEBUG("CLIENT: error while server acking the count: "
				 "<%s> (len=%zu)\n",
				 ct->ctrl_buf, strlen(ct->ctrl_buf));
			return ret;
		}
		PP_DEBUG("CLIENT: count acked by server\n");
	} else {
		memset(&ct->ctrl_buf, '\0', PP_MSG_LEN_CNT + 1);

		PP_DEBUG("SERVER: receiving count\n");
		ret = pp_ctrl_recv(ct, ct->ctrl_buf, PP_MSG_LEN_CNT);
		if (ret < 0)
			return ret;
		if (ret < PP_MSG_LEN_CNT) {
			PP_ERR(
			    "SERVER: bad length of received data (len=%d/%d)",
			    ret, PP_MSG_LEN_CNT);
			return -EBADMSG;
		}
		ct->cnt_ack_msg = parse_ulong(ct->ctrl_buf, -1);
		if (ct->cnt_ack_msg < 0)
			return ret;
		PP_DEBUG("SERVER: received count = <%ld> (len=%zu)\n",
			 ct->cnt_ack_msg, strlen(ct->ctrl_buf));

		snprintf(ct->ctrl_buf, sizeof(PP_MSG_CHECK_CNT_OK), "%s",
			 PP_MSG_CHECK_CNT_OK);
		ret =
		    pp_ctrl_send(ct, ct->ctrl_buf, sizeof(PP_MSG_CHECK_CNT_OK));
		if (ret < 0)
			return ret;
		if (ret < sizeof(PP_MSG_CHECK_CNT_OK)) {
			PP_ERR(
			    "CLIENT: bad length of received data (len=%d/%zu)",
			    ret, sizeof(PP_MSG_CHECK_CNT_OK));
			return -EBADMSG;
		}
		PP_DEBUG("SERVER: acked count to client\n");
	}

	PP_DEBUG("Ack count exchanged\n");

	return 0;
}

/*******************************************************************************
 *                                         Options
 ******************************************************************************/

static inline void pp_start(struct ct_pingpong *ct)
{
	PP_DEBUG("Starting test chrono\n");
	ct->opts.options |= PP_OPT_ACTIVE;
	ct->start = pp_gettime_us();
}

static inline void pp_stop(struct ct_pingpong *ct)
{
	ct->end = pp_gettime_us();
	ct->opts.options &= ~PP_OPT_ACTIVE;
	PP_DEBUG("Stopped test chrono\n");
}

static inline int pp_check_opts(struct ct_pingpong *ct, uint64_t flags)
{
	return (ct->opts.options & flags) == flags;
}

/*******************************************************************************
 *                                         Data Verification
 ******************************************************************************/

static void pp_fill_buf(void *buf, int size)
{
	char *msg_buf;
	int msg_index;
	static unsigned int iter;
	int i;

	msg_index = ((iter++) * INTEG_SEED) % integ_alphabet_length;
	msg_buf = (char *)buf;
	for (i = 0; i < size; i++) {
		PP_DEBUG("index=%d msg_index=%d\n", i, msg_index);
		msg_buf[i] = integ_alphabet[msg_index++];
		if (msg_index >= integ_alphabet_length)
			msg_index = 0;
	}
}

static int pp_check_buf(void *buf, int size)
{
	char *recv_data;
	char c;
	static unsigned int iter;
	int msg_index;
	int i;

	PP_DEBUG("Verifying buffer content\n");

	msg_index = ((iter++) * INTEG_SEED) % integ_alphabet_length;
	recv_data = (char *)buf;

	for (i = 0; i < size; i++) {
		c = integ_alphabet[msg_index++];
		if (msg_index >= integ_alphabet_length)
			msg_index = 0;
		if (c != recv_data[i]) {
			PP_DEBUG("index=%d msg_index=%d expected=%d got=%d\n",
				 i, msg_index, c, recv_data[i]);
			break;
		}
	}
	if (i != size) {
		PP_DEBUG("Finished veryfing buffer: content is corrupted\n");
		printf("Error at iteration=%d size=%d byte=%d\n", iter, size,
		       i);
		return 1;
	}

	PP_DEBUG("Buffer verified\n");

	return 0;
}


/*******************************************************************************
 *                                         Error handling
 ******************************************************************************/

static void eq_readerr(struct fid_eq *eq)
{
	struct fi_eq_err_entry eq_err = { 0 };
	int rd;

	rd = fi_eq_readerr(eq, &eq_err, 0);
	if (rd != sizeof(eq_err)) {
		PP_PRINTERR("fi_eq_readerr", rd);
	} else {
		PP_ERR("eq_readerr: %s",
		       fi_eq_strerror(eq, eq_err.prov_errno, eq_err.err_data,
				      NULL, 0));
	}
}

static void pp_process_eq_err(ssize_t rd, struct fid_eq *eq, const char *fn)
{
	if (rd == -FI_EAVAIL)
		eq_readerr(eq);
	else
		PP_PRINTERR(fn, rd);
}

/*******************************************************************************
 *                                         Test sizes
 ******************************************************************************/

static int generate_test_sizes(struct pp_opts *opts, size_t tx_size, int **sizes_)
{
	int defaults[] = {64, 256, 1024, 4096, 65536, 1048576};
	int power_of_two;
	int half_up;
	int n = 0;
	int i;
	int *sizes = NULL;

	PP_DEBUG("Generating test sizes\n");

	sizes = calloc(64, sizeof(*sizes));
	if (sizes == NULL)
		return 0;
	*sizes_ = sizes;

	if (opts->options & PP_OPT_SIZE) {
		if (opts->transfer_size > tx_size)
			return 0;

		sizes[0] = opts->transfer_size;
		n = 1;
	} else if (opts->sizes_enabled != PP_ENABLE_ALL) {
		for (i = 0; i < (sizeof(defaults) / sizeof(defaults[0])); i++) {
			if (defaults[i] > tx_size)
				break;

			sizes[i] = defaults[i];
			n++;
		}
	} else {
		for (i = 0;; i++) {
			power_of_two = (i == 0) ? 0 : (1 << i);
			half_up =
			    (i == 0) ? 1 : power_of_two + (power_of_two / 2);

			if (power_of_two > tx_size)
				break;

			sizes[i * 2] = power_of_two;
			n++;

			if (half_up > tx_size)
				break;

			sizes[(i * 2) + 1] = half_up;
			n++;
		}
	}

	PP_DEBUG("Generated %d test sizes\n", n);

	return n;
}

/*******************************************************************************
 *                                    Performance output
 ******************************************************************************/

/* str must be an allocated buffer of PP_STR_LEN bytes */
static char *size_str(char *str, uint64_t size)
{
	uint64_t base, fraction = 0;
	char mag;

	memset(str, '\0', PP_STR_LEN);

	if (size >= (1 << 30)) {
		base = 1 << 30;
		mag = 'g';
	} else if (size >= (1 << 20)) {
		base = 1 << 20;
		mag = 'm';
	} else if (size >= (1 << 10)) {
		base = 1 << 10;
		mag = 'k';
	} else {
		base = 1;
		mag = '\0';
	}

	if (size / base < 10)
		fraction = (size % base) * 10 / base;

	if (fraction)
		snprintf(str, PP_STR_LEN, "%" PRIu64 ".%" PRIu64 "%c",
			 size / base, fraction, mag);
	else
		snprintf(str, PP_STR_LEN, "%" PRIu64 "%c", size / base, mag);

	return str;
}

/* str must be an allocated buffer of PP_STR_LEN bytes */
static char *cnt_str(char *str, size_t size, uint64_t cnt)
{
	if (cnt >= 1000000000)
		snprintf(str, size, "%" PRIu64 "b", cnt / 1000000000);
	else if (cnt >= 1000000)
		snprintf(str, size, "%" PRIu64 "m", cnt / 1000000);
	else if (cnt >= 1000)
		snprintf(str, size, "%" PRIu64 "k", cnt / 1000);
	else
		snprintf(str, size, "%" PRIu64, cnt);

	return str;
}

static void show_perf(char *name, int tsize, int sent, int acked,
	       uint64_t start, uint64_t end, int xfers_per_iter)
{
	static int header = 1;
	char str[PP_STR_LEN];
	int64_t elapsed = end - start;
	uint64_t bytes = (uint64_t)sent * tsize * xfers_per_iter;
	float usec_per_xfer;

	if (sent == 0)
		return;

	if (name) {
		if (header) {
			printf("%-50s%-8s%-8s%-9s%-8s%8s %10s%13s%13s\n",
			       "name", "bytes", "#sent", "#ack", "total",
			       "time", "MB/sec", "usec/xfer", "Mxfers/sec");
			header = 0;
		}

		printf("%-50s", name);
	} else {
		if (header) {
			printf("%-8s%-8s%-9s%-8s%8s %10s%13s%13s\n", "bytes",
			       "#sent", "#ack", "total", "time", "MB/sec",
			       "usec/xfer", "Mxfers/sec");
			header = 0;
		}
	}

	printf("%-8s", size_str(str, tsize));
	printf("%-8s", cnt_str(str, sizeof(str), sent));

	if (sent == acked)
		printf("=%-8s", cnt_str(str, sizeof(str), acked));
	else if (sent < acked)
		printf("-%-8s", cnt_str(str, sizeof(str), acked - sent));
	else
		printf("+%-8s", cnt_str(str, sizeof(str), sent - acked));

	printf("%-8s", size_str(str, bytes));

	usec_per_xfer = ((float)elapsed / sent / xfers_per_iter);
	printf("%8.2fs%10.2f%11.2f%11.2f\n", elapsed / 1000000.0,
	       bytes / (1.0 * elapsed), usec_per_xfer, 1.0 / usec_per_xfer);
}

/*******************************************************************************
 *                                      Data Messaging
 ******************************************************************************/

static int pp_cq_readerr(struct fid_cq *cq)
{
	struct fi_cq_err_entry cq_err = { 0 };
	int ret;

	ret = fi_cq_readerr(cq, &cq_err, 0);
	if (ret < 0) {
		PP_PRINTERR("fi_cq_readerr", ret);
	} else {
		PP_ERR("cq_readerr: %s",
		       fi_cq_strerror(cq, cq_err.prov_errno, cq_err.err_data,
				      NULL, 0));
		ret = -cq_err.err;
	}
	return ret;
}

static int pp_get_cq_comp(struct fid_cq *cq, uint64_t *cur, uint64_t total,
			  int timeout_sec)
{
	struct fi_cq_err_entry comp;
	uint64_t a = 0, b = 0;
	int ret = 0;

	if (timeout_sec >= 0)
		a = pp_gettime_us();

	do {
		ret = fi_cq_read(cq, &comp, 1);
		if (ret > 0) {
			if (timeout_sec >= 0)
				a = pp_gettime_us();

			(*cur)++;
		} else if (ret < 0 && ret != -FI_EAGAIN) {
			if (ret == -FI_EAVAIL) {
				ret = pp_cq_readerr(cq);
				(*cur)++;
			} else {
				PP_PRINTERR("pp_get_cq_comp", ret);
			}

			return ret;
		} else if (timeout_sec >= 0) {
			b = pp_gettime_us();
			if ((b - a) / 1000000 > timeout_sec) {
				fprintf(stderr, "%ds timeout expired\n",
					timeout_sec);
				return -FI_ENODATA;
			}
		}
	} while (total - *cur > 0);

	return 0;
}

static int pp_get_rx_comp(struct ct_pingpong *ct, uint64_t total)
{
	int ret = FI_SUCCESS;

	if (ct->rxcq) {
		ret = pp_get_cq_comp(ct->rxcq, &(ct->rx_cq_cntr), total,
				     ct->timeout_sec);
	} else {
		PP_ERR(
		    "Trying to get a RX completion when no RX CQ was opened");
		ret = -FI_EOTHER;
	}
	return ret;
}

static int pp_get_tx_comp(struct ct_pingpong *ct, uint64_t total)
{
	int ret;

	if (ct->txcq) {
		ret = pp_get_cq_comp(ct->txcq, &(ct->tx_cq_cntr), total, -1);
	} else {
		PP_ERR(
		    "Trying to get a TX completion when no TX CQ was opened");
		ret = -FI_EOTHER;
	}
	return ret;
}

#define PP_POST(post_fn, comp_fn, seq, op_str, ...)                            \
	do {                                                                   \
		int timeout_sec_save;                                          \
		int ret, rc;                                                   \
									       \
		while (1) {                                                    \
			ret = post_fn(__VA_ARGS__);                            \
			if (!ret)                                              \
				break;                                         \
									       \
			if (ret != -FI_EAGAIN) {                               \
				PP_PRINTERR(op_str, ret);                      \
				return ret;                                    \
			}                                                      \
									       \
			timeout_sec_save = ct->timeout_sec;                    \
			ct->timeout_sec = 0;                                   \
			rc = comp_fn(ct, seq);                                 \
			ct->timeout_sec = timeout_sec_save;                    \
			if (rc && rc != -FI_EAGAIN) {                          \
				PP_ERR("Failed to get " op_str " completion"); \
				return rc;                                     \
			}                                                      \
		}                                                              \
		seq++;                                                         \
	} while (0)

static ssize_t pp_post_tx(struct ct_pingpong *ct, struct fid_ep *ep, size_t size,
			  void *ctx)
{
	if (!(ct->fi->caps & FI_TAGGED))
		PP_POST(fi_send, pp_get_tx_comp, ct->tx_seq, "transmit", ep,
			ct->tx_buf, size, fi_mr_desc(ct->mr),
			ct->remote_fi_addr, ctx);
	else
		PP_POST(fi_tsend, pp_get_tx_comp, ct->tx_seq, "t-transmit", ep,
			ct->tx_buf, size, fi_mr_desc(ct->mr),
			ct->remote_fi_addr, TAG, ctx);
	return 0;
}

static ssize_t pp_tx(struct ct_pingpong *ct, struct fid_ep *ep, size_t size)
{
	ssize_t ret;

	if (pp_check_opts(ct, PP_OPT_VERIFY_DATA | PP_OPT_ACTIVE))
		pp_fill_buf((char *)ct->tx_buf + ct->tx_prefix_size, size);

	ret = pp_post_tx(ct, ep, size + ct->tx_prefix_size, ct->tx_ctx_ptr);
	if (ret)
		return ret;

	ret = pp_get_tx_comp(ct, ct->tx_seq);

	return ret;
}

static ssize_t pp_post_inject(struct ct_pingpong *ct, struct fid_ep *ep,
			      size_t size)
{
	if (!(ct->fi->caps & FI_TAGGED))
		PP_POST(fi_inject, pp_get_tx_comp, ct->tx_seq, "inject", ep,
			ct->tx_buf, size, ct->remote_fi_addr);
	else
		PP_POST(fi_tinject, pp_get_tx_comp, ct->tx_seq, "tinject", ep,
			ct->tx_buf, size, ct->remote_fi_addr, TAG);
	ct->tx_cq_cntr++;
	return 0;
}

static ssize_t pp_inject(struct ct_pingpong *ct, struct fid_ep *ep, size_t size)
{
	ssize_t ret;

	if (pp_check_opts(ct, PP_OPT_VERIFY_DATA | PP_OPT_ACTIVE))
		pp_fill_buf((char *)ct->tx_buf + ct->tx_prefix_size, size);

	ret = pp_post_inject(ct, ep, size + ct->tx_prefix_size);
	if (ret)
		return ret;

	return ret;
}

static ssize_t pp_post_rx(struct ct_pingpong *ct, struct fid_ep *ep,
			  size_t size, void *ctx)
{
	if (!(ct->fi->caps & FI_TAGGED))
		PP_POST(fi_recv, pp_get_rx_comp, ct->rx_seq, "receive", ep,
			ct->rx_buf, size, fi_mr_desc(ct->mr), 0, ctx);
	else
		PP_POST(fi_trecv, pp_get_rx_comp, ct->rx_seq, "t-receive", ep,
			ct->rx_buf, size, fi_mr_desc(ct->mr), 0, TAG, 0, ctx);
	return 0;
}

static ssize_t pp_rx(struct ct_pingpong *ct, struct fid_ep *ep, size_t size)
{
	ssize_t ret;

	ret = pp_get_rx_comp(ct, ct->rx_seq);
	if (ret)
		return ret;

	if (pp_check_opts(ct, PP_OPT_VERIFY_DATA | PP_OPT_ACTIVE)) {
		ret = pp_check_buf((char *)ct->rx_buf + ct->rx_prefix_size,
				   size);
		if (ret)
			return ret;
	}
	/* TODO: verify CQ data, if available */

	/* Ignore the size arg. Post a buffer large enough to handle all message
	 * sizes. pp_sync() makes use of pp_rx() and gets called in tests just
	 * before message size is updated. The recvs posted are always for the
	 * next incoming message.
	 */
	ret = pp_post_rx(ct, ct->ep, MAX(ct->rx_size , PP_MAX_CTRL_MSG) +
			 ct->rx_prefix_size, ct->rx_ctx_ptr);
	if (!ret)
		ct->cnt_ack_msg++;

	return ret;
}

/*******************************************************************************
 *                                Initialization and allocations
 ******************************************************************************/

static void init_test(struct ct_pingpong *ct, struct pp_opts *opts)
{
	char sstr[PP_STR_LEN];

	size_str(sstr, opts->transfer_size);

	ct->cnt_ack_msg = 0;
}

static uint64_t pp_init_cq_data(struct fi_info *info)
{
	if (info->domain_attr->cq_data_size >= sizeof(uint64_t)) {
		return 0x0123456789abcdefULL;
	} else {
		return 0x0123456789abcdefULL &
		       ((0x1ULL << (info->domain_attr->cq_data_size * 8)) - 1);
	}
}

static int pp_alloc_msgs(struct ct_pingpong *ct)
{
	int ret;
	long alignment = 1;

	ct->tx_size = ct->opts.options & PP_OPT_SIZE ? ct->opts.transfer_size
						     : PP_MAX_DATA_MSG;
	if (ct->tx_size > ct->fi->ep_attr->max_msg_size)
		ct->tx_size = ct->fi->ep_attr->max_msg_size;
	ct->rx_size = ct->tx_size;
	ct->buf_size = MAX(ct->tx_size, PP_MAX_CTRL_MSG) +
		       MAX(ct->rx_size, PP_MAX_CTRL_MSG) +
		       ct->tx_prefix_size + ct->rx_prefix_size;

	alignment = ofi_get_page_size();
	if (alignment < 0) {
		PP_PRINTERR("ofi_get_page_size", alignment);
		return alignment;
	}
	/* Extra alignment for the second part of the buffer */
	ct->buf_size += alignment;

	ret = ofi_memalign(&(ct->buf), (size_t)alignment, ct->buf_size);
	if (ret) {
		PP_PRINTERR("ofi_memalign", ret);
		return ret;
	}
	memset(ct->buf, 0, ct->buf_size);
	ct->rx_buf = ct->buf;
	ct->tx_buf = (char *)ct->buf +
			MAX(ct->rx_size, PP_MAX_CTRL_MSG) +
			ct->tx_prefix_size;
	ct->tx_buf = (void *)(((uintptr_t)ct->tx_buf + alignment - 1) &
			      ~(alignment - 1));

	ct->remote_cq_data = pp_init_cq_data(ct->fi);

	if (ct->fi->domain_attr->mr_mode & FI_MR_LOCAL) {
		ret = fi_mr_reg(ct->domain, ct->buf, ct->buf_size,
				FI_SEND | FI_RECV, 0, PP_MR_KEY, 0, &(ct->mr),
				NULL);
		if (ret) {
			PP_PRINTERR("fi_mr_reg", ret);
			return ret;
		}
	} else {
		ct->mr = &(ct->no_mr);
	}

	return 0;
}

static int pp_open_fabric_res(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Opening fabric resources: fabric, eq & domain\n");

	ret = fi_fabric(ct->fi->fabric_attr, &(ct->fabric), NULL);
	if (ret) {
		PP_PRINTERR("fi_fabric", ret);
		return ret;
	}

	ret = fi_eq_open(ct->fabric, &(ct->eq_attr), &(ct->eq), NULL);
	if (ret) {
		PP_PRINTERR("fi_eq_open", ret);
		return ret;
	}

	ret = fi_domain(ct->fabric, ct->fi, &(ct->domain), NULL);
	if (ret) {
		PP_PRINTERR("fi_domain", ret);
		return ret;
	}

	PP_DEBUG("Fabric resources opened\n");

	return 0;
}

static int pp_alloc_active_res(struct ct_pingpong *ct, struct fi_info *fi)
{
	int ret;

	ret = pp_alloc_msgs(ct);
	if (ret)
		return ret;

	if (ct->cq_attr.format == FI_CQ_FORMAT_UNSPEC)
		ct->cq_attr.format = FI_CQ_FORMAT_CONTEXT;

	ct->cq_attr.wait_obj = FI_WAIT_NONE;

	ct->cq_attr.size = fi->tx_attr->size;
	ret = fi_cq_open(ct->domain, &(ct->cq_attr), &(ct->txcq), &(ct->txcq));
	if (ret) {
		PP_PRINTERR("fi_cq_open", ret);
		return ret;
	}

	ct->cq_attr.size = fi->rx_attr->size;
	ret = fi_cq_open(ct->domain, &(ct->cq_attr), &(ct->rxcq), &(ct->rxcq));
	if (ret) {
		PP_PRINTERR("fi_cq_open", ret);
		return ret;
	}

	if (fi->ep_attr->type == FI_EP_RDM ||
	    fi->ep_attr->type == FI_EP_DGRAM) {
		if (fi->domain_attr->av_type != FI_AV_UNSPEC)
			ct->av_attr.type = fi->domain_attr->av_type;

		ret = fi_av_open(ct->domain, &(ct->av_attr), &(ct->av), NULL);
		if (ret) {
			PP_PRINTERR("fi_av_open", ret);
			return ret;
		}
	}

	if (fi->tx_attr->mode & FI_MSG_PREFIX)
		ct->tx_prefix_size = fi->ep_attr->msg_prefix_size;
	if (fi->rx_attr->mode & FI_MSG_PREFIX)
		ct->rx_prefix_size = fi->ep_attr->msg_prefix_size;

	ret = fi_endpoint(ct->domain, fi, &(ct->ep), NULL);
	if (ret) {
		PP_PRINTERR("fi_endpoint", ret);
		return ret;
	}

	return 0;
}

static int pp_getinfo(struct ct_pingpong *ct, struct fi_info *hints,
		      struct fi_info **info)
{
	uint64_t flags = 0;
	int ret;

	if (!hints->ep_attr->type)
		hints->ep_attr->type = FI_EP_DGRAM;

	ret = fi_getinfo(FI_VERSION(FI_MAJOR_VERSION, FI_MINOR_VERSION),
			 NULL, NULL, flags, hints, info);
	if (ret) {
		PP_PRINTERR("fi_getinfo", ret);
		return ret;
	}

	if (((*info)->tx_attr->mode & FI_CONTEXT2) != 0) {
		ct->tx_ctx_ptr = &(ct->tx_ctx[0]);
	} else if (((*info)->tx_attr->mode & FI_CONTEXT) != 0) {
		ct->tx_ctx_ptr = &(ct->tx_ctx[1]);
	} else if (((*info)->mode & FI_CONTEXT2) != 0) {
		ct->tx_ctx_ptr = &(ct->tx_ctx[0]);
	} else if (((*info)->mode & FI_CONTEXT) != 0) {
		ct->tx_ctx_ptr = &(ct->tx_ctx[1]);
	} else {
		ct->tx_ctx_ptr = NULL;
	}

	if (((*info)->rx_attr->mode & FI_CONTEXT2) != 0) {
		ct->rx_ctx_ptr = &(ct->rx_ctx[0]);
	} else if (((*info)->rx_attr->mode & FI_CONTEXT) != 0) {
		ct->rx_ctx_ptr = &(ct->rx_ctx[1]);
	} else if (((*info)->mode & FI_CONTEXT2) != 0) {
		ct->rx_ctx_ptr = &(ct->rx_ctx[0]);
	} else if (((*info)->mode & FI_CONTEXT) != 0) {
		ct->rx_ctx_ptr = &(ct->rx_ctx[1]);
	} else {
		ct->rx_ctx_ptr = NULL;
	}

	if ((hints->caps & FI_DIRECTED_RECV) == 0) {
		(*info)->caps &= ~FI_DIRECTED_RECV;
		(*info)->rx_attr->caps &= ~FI_DIRECTED_RECV;
	}

	return 0;
}

#define PP_EP_BIND(ep, fd, flags)                                              \
	do {                                                                   \
		int ret;                                                       \
		if ((fd)) {                                                    \
			ret = fi_ep_bind((ep), &(fd)->fid, (flags));           \
			if (ret) {                                             \
				PP_PRINTERR("fi_ep_bind", ret);                \
				return ret;                                    \
			}                                                      \
		}                                                              \
	} while (0)

static int pp_init_ep(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Initializing endpoint\n");

	if (ct->fi->ep_attr->type == FI_EP_MSG)
		PP_EP_BIND(ct->ep, ct->eq, 0);
	PP_EP_BIND(ct->ep, ct->av, 0);
	PP_EP_BIND(ct->ep, ct->txcq, FI_TRANSMIT);
	PP_EP_BIND(ct->ep, ct->rxcq, FI_RECV);

	ret = fi_enable(ct->ep);
	if (ret) {
		PP_PRINTERR("fi_enable", ret);
		return ret;
	}

	ret = pp_post_rx(ct, ct->ep, MAX(ct->rx_size, PP_MAX_CTRL_MSG) +
			 ct->rx_prefix_size, ct->rx_ctx_ptr);
	if (ret)
		return ret;

	PP_DEBUG("Endpoint initialized\n");

	return 0;
}

static int pp_av_insert(struct fid_av *av, void *addr, size_t count,
			fi_addr_t *fi_addr, uint64_t flags, void *context)
{
	int ret;

	PP_DEBUG("Connection-less endpoint: inserting new address in vector\n");

	ret = fi_av_insert(av, addr, count, fi_addr, flags, context);
	if (ret < 0) {
		PP_PRINTERR("fi_av_insert", ret);
		return ret;
	} else if (ret != count) {
		PP_ERR("fi_av_insert: number of addresses inserted = %d;"
		       " number of addresses given = %zd\n",
		       ret, count);
		return -EXIT_FAILURE;
	}

	PP_DEBUG("Connection-less endpoint: new address inserted in vector\n");

	return 0;
}

static int pp_exchange_names_connected(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Connection-based endpoint: setting up connection\n");

	if (ct->opts.dst_addr) {
		ret = pp_recv_name(ct);
		if (ret < 0)
			return ret;

		ret = pp_getinfo(ct, ct->hints, &(ct->fi));
		if (ret)
			return ret;
	} else {
		ret = pp_send_name(ct, &ct->pep->fid);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static int pp_start_server(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Connected endpoint: starting server\n");

	ret = pp_getinfo(ct, ct->hints, &(ct->fi_pep));
	if (ret)
		return ret;

	ret = fi_fabric(ct->fi_pep->fabric_attr, &(ct->fabric), NULL);
	if (ret) {
		PP_PRINTERR("fi_fabric", ret);
		return ret;
	}

	ret = fi_eq_open(ct->fabric, &(ct->eq_attr), &(ct->eq), NULL);
	if (ret) {
		PP_PRINTERR("fi_eq_open", ret);
		return ret;
	}

	ret = fi_passive_ep(ct->fabric, ct->fi_pep, &(ct->pep), NULL);
	if (ret) {
		PP_PRINTERR("fi_passive_ep", ret);
		return ret;
	}

	ret = fi_pep_bind(ct->pep, &(ct->eq->fid), 0);
	if (ret) {
		PP_PRINTERR("fi_pep_bind", ret);
		return ret;
	}

	ret = fi_listen(ct->pep);
	if (ret) {
		PP_PRINTERR("fi_listen", ret);
		return ret;
	}

	PP_DEBUG("Connected endpoint: server started\n");

	return 0;
}

static int pp_server_connect(struct ct_pingpong *ct)
{
	struct fi_eq_cm_entry entry;
	uint32_t event;
	ssize_t rd;
	int ret;

	PP_DEBUG("Connected endpoint: connecting server\n");

	ret = pp_exchange_names_connected(ct);
	if (ret)
		return ret;

	/* Listen */
	rd = fi_eq_sread(ct->eq, &event, &entry, sizeof(entry), -1, 0);
	if (rd != sizeof(entry)) {
		pp_process_eq_err(rd, ct->eq, "fi_eq_sread");
		return (int) rd;
	}

	if (event != FI_CONNREQ) {
		fprintf(stderr, "Unexpected CM event %d\n", event);
		return -FI_EOTHER;
	}

	ct->fi = entry.info;
	ret = fi_domain(ct->fabric, ct->fi, &(ct->domain), NULL);
	if (ret) {
		PP_PRINTERR("fi_domain", ret);
		goto err;
	}

	ret = pp_alloc_active_res(ct, ct->fi);
	if (ret)
		goto err;

	ret = pp_init_ep(ct);
	if (ret)
		goto err;

	PP_DEBUG("accepting\n");

	ret = fi_accept(ct->ep, NULL, 0);
	if (ret) {
		PP_PRINTERR("fi_accept", ret);
		goto err;
	}

	/* Accept */
	rd = fi_eq_sread(ct->eq, &event, &entry, sizeof(entry), -1, 0);
	if (rd != sizeof(entry)) {
		pp_process_eq_err(rd, ct->eq, "fi_eq_sread");
		ret = (int)rd;
		goto err;
	}

	if (event != FI_CONNECTED || entry.fid != &(ct->ep->fid)) {
		fprintf(stderr, "Unexpected CM event %d fid %p (ep %p)\n",
			event, entry.fid, ct->ep);
		ret = -FI_EOTHER;
		goto err;
	}

	PP_DEBUG("Connected endpoint: server connected\n");

	return 0;
err:
	fi_reject(ct->pep, ct->fi->handle, NULL, 0);
	return ret;
}

static int pp_client_connect(struct ct_pingpong *ct)
{
	struct fi_eq_cm_entry entry;
	uint32_t event;
	ssize_t rd;
	int ret;

	ret = pp_exchange_names_connected(ct);
	if (ret)
		return ret;

	ret = pp_open_fabric_res(ct);
	if (ret)
		return ret;

	ret = pp_alloc_active_res(ct, ct->fi);
	if (ret)
		return ret;

	ret = pp_init_ep(ct);
	if (ret)
		return ret;

	ret = fi_connect(ct->ep, ct->rem_name, NULL, 0);
	if (ret) {
		PP_PRINTERR("fi_connect", ret);
		return ret;
	}

	/* Connect */
	rd = fi_eq_sread(ct->eq, &event, &entry, sizeof(entry), -1, 0);
	if (rd != sizeof(entry)) {
		pp_process_eq_err(rd, ct->eq, "fi_eq_sread");
		ret = (int)rd;
		return ret;
	}

	if (event != FI_CONNECTED || entry.fid != &(ct->ep->fid)) {
		fprintf(stderr, "Unexpected CM event %d fid %p (ep %p)\n",
			event, entry.fid, ct->ep);
		ret = -FI_EOTHER;
		return ret;
	}

	return 0;
}

static int pp_init_fabric(struct ct_pingpong *ct)
{
	int ret;

	ret = pp_ctrl_init(ct);
	if (ret)
		return ret;

	PP_DEBUG("Initializing fabric\n");

	PP_DEBUG("Connection-less endpoint: initializing address vector\n");

	if (ct->opts.dst_addr) {
		ret = pp_recv_name(ct);
		if (ret < 0)
			return ret;

		ret = pp_getinfo(ct, ct->hints, &(ct->fi));
		if (ret)
			return ret;

		ret = pp_open_fabric_res(ct);
		if (ret)
			return ret;

		ret = pp_alloc_active_res(ct, ct->fi);
		if (ret)
			return ret;

		ret = pp_init_ep(ct);
		if (ret)
			return ret;

		ret = pp_send_name(ct, &ct->ep->fid);
	} else {
		PP_DEBUG("SERVER: getinfo\n");
		ret = pp_getinfo(ct, ct->hints, &(ct->fi));
		if (ret)
			return ret;

		PP_DEBUG("SERVER: open fabric resources\n");
		ret = pp_open_fabric_res(ct);
		if (ret)
			return ret;

		PP_DEBUG("SERVER: allocate active resource\n");
		ret = pp_alloc_active_res(ct, ct->fi);
		if (ret)
			return ret;

		PP_DEBUG("SERVER: initialize endpoint\n");
		ret = pp_init_ep(ct);
		if (ret)
			return ret;

		ret = pp_send_name(ct, &ct->ep->fid);
		if (ret < 0)
			return ret;

		ret = pp_recv_name(ct);
	}

	if (ret < 0)
		return ret;

	if (ct->opts.dst_addr) {
		/* Set */
		ret = pp_av_insert(ct->av, ct->rem_name, 1, &(ct->remote_fi_addr), 0,
				   NULL);
		if (ret)
			return ret;
		if (ct->fi->domain_attr->caps & FI_LOCAL_COMM)
			ret = pp_av_insert(ct->av, ct->local_name, 1,
					&(ct->local_fi_addr), 0, NULL);
	} else {
		if (ct->fi->domain_attr->caps & FI_LOCAL_COMM) {
			ret = pp_av_insert(ct->av, ct->local_name, 1,
					&(ct->local_fi_addr), 0, NULL);
			if (ret)
				return ret;
		}
		ret = pp_av_insert(ct->av, ct->rem_name, 1, &(ct->remote_fi_addr), 0,
				   NULL);
	}
	if (ret)
		return ret;
	PP_DEBUG("Connection-less endpoint: address vector initialized\n");

	PP_DEBUG("Fabric Initialized\n");

	return 0;
}

/*******************************************************************************
 *                                Deallocations and Final
 ******************************************************************************/

static void pp_free_res(struct ct_pingpong *ct)
{
	PP_DEBUG("Freeing resources of test suite\n");

	if (ct->mr != &(ct->no_mr))
		PP_CLOSE_FID(ct->mr);
	PP_CLOSE_FID(ct->ep);
	PP_CLOSE_FID(ct->pep);
	PP_CLOSE_FID(ct->rxcq);
	PP_CLOSE_FID(ct->txcq);
	PP_CLOSE_FID(ct->av);
	PP_CLOSE_FID(ct->eq);
	PP_CLOSE_FID(ct->domain);
	PP_CLOSE_FID(ct->fabric);

	free(ct->rem_name);
	free(ct->local_name);

	if (ct->buf) {
		ofi_freealign(ct->buf);
		ct->buf = ct->rx_buf = ct->tx_buf = NULL;
		ct->buf_size = ct->rx_size = ct->tx_size = 0;
	}
	if (ct->fi_pep) {
		fi_freeinfo(ct->fi_pep);
		ct->fi_pep = NULL;
	}
	if (ct->fi) {
		fi_freeinfo(ct->fi);
		ct->fi = NULL;
	}
	if (ct->hints) {
		fi_freeinfo(ct->hints);
		ct->hints = NULL;
	}

	PP_DEBUG("Resources of test suite freed\n");
}

static int pp_finalize(struct ct_pingpong *ct)
{
	struct iovec iov;
	int ret;
	struct fi_context ctx[2];
	void *mem_desc[1] = { fi_mr_desc(ct->mr) };
	const char *fin_buf = "fin";
	const size_t fin_buf_size = strlen(fin_buf) + 1;

	PP_DEBUG("Terminating test\n");

	strcpy(ct->tx_buf, fin_buf);
	((char *)ct->tx_buf)[fin_buf_size - 1] = '\0';

	iov.iov_base = ct->tx_buf;
	iov.iov_len = fin_buf_size + ct->tx_prefix_size;

	if (!(ct->fi->caps & FI_TAGGED)) {
		struct fi_msg msg = {
			.msg_iov = &iov,
			.iov_count = 1,
			.desc = mem_desc,
			.addr = ct->remote_fi_addr,
			.context = ctx,
		};

		ret = fi_sendmsg(ct->ep, &msg, FI_TRANSMIT_COMPLETE);
		if (ret) {
			PP_PRINTERR("transmit", ret);
			return ret;
		}
	} else {
		struct fi_msg_tagged tmsg = {
			.msg_iov = &iov,
			.iov_count = 1,
			.desc = mem_desc,
			.addr = ct->remote_fi_addr,
			.context = ctx,
			.tag = TAG,
		};

		ret = fi_tsendmsg(ct->ep, &tmsg, FI_TRANSMIT_COMPLETE);
		if (ret) {
			PP_PRINTERR("t-transmit", ret);
			return ret;
		}
	}

	ret = pp_get_tx_comp(ct, ++ct->tx_seq);
	if (ret)
		return ret;

	ret = pp_get_rx_comp(ct, ct->rx_seq);
	if (ret)
		return ret;

	if (pp_check_opts(ct, PP_OPT_VERIFY_DATA | PP_OPT_ACTIVE)) {
		if (strncmp((char *)ct->rx_buf, fin_buf, fin_buf_size))
			return 1;

		PP_DEBUG("Buffer verified\n");
	}

	ret = pp_ctrl_finish(ct);
	if (ret)
		return ret;

	PP_DEBUG("Test terminated\n");

	return 0;
}

/*******************************************************************************
 *                                CLI: Usage and Options parsing
 ******************************************************************************/

static void pp_pingpong_usage(struct ct_pingpong *ct, char *name, char *desc)
{
	fprintf(stderr, "Usage:\n");
	fprintf(stderr, "  %s [OPTIONS]\t\tstart server\n", name);
	fprintf(stderr, "  %s [OPTIONS] <srv_addr>\tconnect to server\n", name);

	if (desc)
		fprintf(stderr, "\n%s\n", desc);

	fprintf(stderr, "\nOptions:\n");

	fprintf(stderr, " %-20s %s\n", "-B <src_port>",
		"source control port number (server: 47592, client: auto)");
	fprintf(stderr, " %-20s %s\n", "-P <dst_port>",
		"destination control port number (client: 47592)");

	fprintf(stderr, " %-20s %s\n", "-d <domain>", "domain name");
	fprintf(stderr, " %-20s %s\n", "-p <provider>",
		"specific provider name eg sockets, verbs");
	fprintf(stderr, " %-20s %s\n", "-e <ep_type>",
		"endpoint type: msg|rdm|dgram (dgram)");

	fprintf(stderr, " %-20s %s (%d)\n", "-I <number>",
		"number of iterations", ct->opts.iterations);
	fprintf(stderr, " %-20s %s\n", "-S <size>",
		"specific transfer size or 'all' (all)");

	fprintf(stderr, " %-20s %s\n", "-c", "enables data_integrity checks");

	fprintf(stderr, " %-20s %s\n", "-m <transmit mode>",
		"transmit mode type: msg|tagged (msg)");

	fprintf(stderr, " %-20s %s\n", "-h", "display this help output");
	fprintf(stderr, " %-20s %s\n", "-v", "enable debugging output");
}

static void pp_parse_opts(struct ct_pingpong *ct, int op, char *optarg)
{
	switch (op) {

	/* Domain */
	case 'd':
		ct->hints->domain_attr->name = strdup(optarg);
		break;

	/* Provider */
	case 'p':
		/* The provider name will be checked during the fabric
		 * initialization.
		 */
		ct->hints->fabric_attr->prov_name = strdup(optarg);
		break;

	/* Endpoint */
	case 'e':
		if (!strncasecmp("msg", optarg, 3) && (strlen(optarg) == 3)) {
			ct->hints->ep_attr->type = FI_EP_MSG;
		} else if (!strncasecmp("rdm", optarg, 3) &&
			   (strlen(optarg) == 3)) {
			ct->hints->ep_attr->type = FI_EP_RDM;
		} else if (!strncasecmp("dgram", optarg, 5) &&
			   (strlen(optarg) == 5)) {
			ct->hints->ep_attr->type = FI_EP_DGRAM;
		} else {
			fprintf(stderr, "Unknown endpoint : %s\n", optarg);
			exit(EXIT_FAILURE);
		}
		break;

	/* Iterations */
	case 'I':
		ct->opts.options |= PP_OPT_ITER;
		ct->opts.iterations = (int)parse_ulong(optarg, INT_MAX);
		if (ct->opts.iterations < 0)
			ct->opts.iterations = 0;
		break;

	/* Message Size */
	case 'S':
		if (!strncasecmp("all", optarg, 3) && (strlen(optarg) == 3)) {
			ct->opts.sizes_enabled = PP_ENABLE_ALL;
		} else {
			ct->opts.options |= PP_OPT_SIZE;
			ct->opts.transfer_size =
			    (int)parse_ulong(optarg, INT_MAX);
		}
		break;

	/* Check data */
	case 'c':
		ct->opts.options |= PP_OPT_VERIFY_DATA;
		break;

	/* Source Port */
	case 'B':
		ct->opts.src_port = parse_ulong(optarg, UINT16_MAX);
		break;

	/* Destination Port */
	case 'P':
		ct->opts.dst_port = parse_ulong(optarg, UINT16_MAX);
		break;

	case 'm':
		if (strncasecmp("msg", optarg, 4)) {
			ct->hints->caps &= ~FI_MSG;
			ct->hints->caps |= FI_TAGGED;
		}
		break;

	/* Debug */
	case 'v':
		pp_debug = 1;
		break;
	default:
		/* let getopt handle unknown opts*/
		break;
	}
}

/*******************************************************************************
 *      PingPong core and implemenations for endpoints
 ******************************************************************************/

static int pingpong(struct ct_pingpong *ct)
{
	int ret, i;

	ret = pp_ctrl_sync(ct);
	if (ret)
		return ret;

	pp_start(ct);
	if (ct->opts.dst_addr) {
		for (i = 0; i < ct->opts.iterations; i++) {

			if (ct->opts.transfer_size <
			    ct->fi->tx_attr->inject_size)
				ret = pp_inject(ct, ct->ep,
						ct->opts.transfer_size);
			else
				ret = pp_tx(ct, ct->ep, ct->opts.transfer_size);
			if (ret)
				return ret;

			ret = pp_rx(ct, ct->ep, ct->opts.transfer_size);
			if (ret)
				return ret;
		}
	} else {
		for (i = 0; i < ct->opts.iterations; i++) {

			ret = pp_rx(ct, ct->ep, ct->opts.transfer_size);
			if (ret)
				return ret;

			if (ct->opts.transfer_size <
			    ct->fi->tx_attr->inject_size)
				ret = pp_inject(ct, ct->ep,
						ct->opts.transfer_size);
			else
				ret = pp_tx(ct, ct->ep, ct->opts.transfer_size);
			if (ret)
				return ret;
		}
	}
	pp_stop(ct);

	ret = pp_ctrl_txrx_msg_count(ct);
	if (ret)
		return ret;

	PP_DEBUG("Results:\n");
	show_perf(NULL, ct->opts.transfer_size, ct->opts.iterations,
		  ct->cnt_ack_msg, ct->start, ct->end, 2);

	return 0;
}

static int run_suite_pingpong(struct ct_pingpong *ct)
{
	int i, sizes_cnt;
	int ret = 0;
	int *sizes = NULL;

	pp_banner_fabric_info(ct);

	sizes_cnt = generate_test_sizes(&ct->opts, ct->tx_size, &sizes);

	PP_DEBUG("Count of sizes to test: %d\n", sizes_cnt);

	for (i = 0; i < sizes_cnt; i++) {
		ct->opts.transfer_size = sizes[i];
		init_test(ct, &(ct->opts));
		ret = pingpong(ct);
		if (ret)
			goto out;
	}

out:
	free(sizes);
	return ret;
}

static int run_pingpong_dgram(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Selected endpoint: DGRAM\n");

	ret = pp_init_fabric(ct);
	if (ret)
		return ret;

	/* Post an extra receive to avoid lacking a posted receive in the
	 * finalize.
	 */
	ret = fi_recv(ct->ep, ct->rx_buf, ct->rx_size, fi_mr_desc(ct->mr), 0,
		      ct->rx_ctx_ptr);
	if (ret)
		return ret;

	ret = run_suite_pingpong(ct);
	if (ret)
		return ret;

	return pp_finalize(ct);
}

static int run_pingpong_rdm(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Selected endpoint: RDM\n");

	ret = pp_init_fabric(ct);
	if (ret)
		return ret;

	ret = run_suite_pingpong(ct);
	if (ret)
		return ret;

	return pp_finalize(ct);
}

static int run_pingpong_msg(struct ct_pingpong *ct)
{
	int ret;

	PP_DEBUG("Selected endpoint: MSG\n");

	ret = pp_ctrl_init(ct);
	if (ret)
		return ret;

	if (!ct->opts.dst_addr) {
		ret = pp_start_server(ct);
		if (ret)
			return ret;
	}

	if (ct->opts.dst_addr) {
		ret = pp_client_connect(ct);
		PP_DEBUG("CLIENT: client_connect=%s\n", ret ? "KO" : "OK");
	} else {
		ret = pp_server_connect(ct);
		PP_DEBUG("SERVER: server_connect=%s\n", ret ? "KO" : "OK");
	}

	if (ret)
		return ret;

	ret = run_suite_pingpong(ct);
	if (ret)
		goto out;

	ret = pp_finalize(ct);
out:
	fi_shutdown(ct->ep, 0);
	return ret;
}

int main(int argc, char **argv)
{
	int op, ret = EXIT_SUCCESS;
	struct ct_pingpong ct = {
		.timeout_sec = -1,
		.ctrl_connfd = -1,
		.opts = {
			.iterations = 10,
			.transfer_size = 64,
			.sizes_enabled = PP_DEFAULT_SIZE
		},
		.eq_attr.wait_obj = FI_WAIT_UNSPEC,
	};

	ct.hints = fi_allocinfo();
	if (!ct.hints)
		return EXIT_FAILURE;
	ct.hints->ep_attr->type = FI_EP_DGRAM;
	ct.hints->caps = FI_MSG;
	ct.hints->mode = FI_CONTEXT | FI_CONTEXT2 | FI_MSG_PREFIX;
	ct.hints->domain_attr->mr_mode = FI_MR_LOCAL | OFI_MR_BASIC_MAP;

	ofi_osd_init();

	while ((op = getopt(argc, argv, "hvd:p:e:I:S:B:P:cm:")) != -1) {
		switch (op) {
		default:
			pp_parse_opts(&ct, op, optarg);
			break;
		case '?':
		case 'h':
			pp_pingpong_usage(&ct, argv[0],
					  "Ping pong client and server");
			return EXIT_FAILURE;
		}
	}

	if (optind < argc)
		ct.opts.dst_addr = argv[optind];

	pp_banner_options(&ct);

	switch (ct.hints->ep_attr->type) {
	case FI_EP_DGRAM:
		if (ct.opts.options & PP_OPT_SIZE)
			ct.hints->ep_attr->max_msg_size = ct.opts.transfer_size;
		ret = run_pingpong_dgram(&ct);
		break;
	case FI_EP_RDM:
		ret = run_pingpong_rdm(&ct);
		break;
	case FI_EP_MSG:
		ret = run_pingpong_msg(&ct);
		break;
	default:
		fprintf(stderr, "Endpoint unsupported: %d\n",
			ct.hints->ep_attr->type);
		ret = EXIT_FAILURE;
	}

	pp_free_res(&ct);
	return -ret;
}
