libstmfproxy/common/stmftransport.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/types.h>
#include <errno.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/stat.h>
#include <sys/sdt.h>
#include <signal.h>
#include <fcntl.h>
#include <libstmfproxy.h>

/*
 * NOTE:
 * This is demo code to be used with the existing demo proxy daemon
 * svc-stmfproxy in /usr/demo/comstar.
 */

struct _s_handle {
    int sockfd;
};

typedef struct _s_handle s_handle_t;

static ssize_t
pt_socket_recv(void *handle, void *buf, size_t len)
{
    s_handle_t *sh = handle;

    return (recv(sh->sockfd, buf, len, MSG_WAITALL));
}

static ssize_t
pt_socket_send(void *handle, void *buf, size_t len)
{
    s_handle_t *sh = handle;

    return (send(sh->sockfd, buf, len, 0));
}

static void *
pt_socket_connect(int server_node, char *server)
{
    int sfd, new_sfd;
    s_handle_t *sh = NULL;
    int on = 1;
    struct sockaddr_in cli_addr, serv_addr;
    struct  sockaddr_in sin;
    socklen_t cliLen = sizeof (cli_addr);

    if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) <= 0) {
        syslog(LOG_DAEMON|LOG_WARNING,
            "socket() call failed: %d", errno);
        return (NULL);
    }

    if (server_node) {

        if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &on,
            sizeof (on)) < 0) {
            syslog(LOG_DAEMON|LOG_WARNING,
                "setsockopt() failed: %d", errno);
            goto serv_out;
        }

        bzero(&serv_addr, sizeof (serv_addr));
        serv_addr.sin_family = AF_INET;
        serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
        /* XXX get from smf? */
        serv_addr.sin_port = htons(6543);

        if (bind(sfd, (struct sockaddr *)&serv_addr,
            sizeof (serv_addr)) < 0) {
            syslog(LOG_DAEMON|LOG_WARNING, "bind() call failed: %d",
                errno);
            goto serv_out;
        }

        (void) listen(sfd, 5);

        new_sfd = accept(sfd, (struct sockaddr *)&cli_addr, &cliLen);

        if (new_sfd < 0) {
            syslog(LOG_DAEMON|LOG_WARNING, "accept failed: %d",
                errno);
            goto serv_out;
        }
        sh = malloc(sizeof (*sh));
        sh->sockfd = new_sfd;
serv_out:
        close(sfd);
    } else {
        struct  hostent *hp;

        /*
         * Assume IP dot notation or if that fails, gethostbyname()
         * If that fails, return
         */
        if ((inet_aton(server, &sin.sin_addr)) == 0) {
            if ((hp = gethostbyname(server)) != NULL) {
                memcpy(&sin.sin_addr.s_addr, hp->h_addr,
                    hp->h_length);
            } else {
                syslog(LOG_DAEMON|LOG_CRIT,
                    "Cannot get IP address for %s", server);
                (void) close(sfd);
                return (NULL);
            }
        } else {
            fprintf(stderr,
                "Sorry, cannot use ip address format\n");
            (void) close(sfd);
            return (NULL);
        }
        sin.sin_family = AF_INET;
        /* XXX pass in from smf */
        sin.sin_port = htons(6543);

        while (connect(sfd, (struct sockaddr *)&sin,
            sizeof (sin)) < 0) {
            close(sfd);
            if (errno == ECONNREFUSED) {
                /* get a fresh socket and retry */
                sfd = socket(AF_INET, SOCK_STREAM, 0);
                if (sfd < 0) {
                    syslog(LOG_DAEMON|LOG_WARNING,
                        "socket() call failed: %d", errno);
                    return (NULL);
                }
                sleep(2);
            } else {
                syslog(LOG_DAEMON|LOG_CRIT,
                    "Cannot connect %s - %d", server, errno);
                return (NULL);
            }
        }
        sh = malloc(sizeof (*sh));
        sh->sockfd = sfd;
    }
    return (sh);
}

pt_ops_t pt_socket_ops = {
    pt_socket_connect,
    pt_socket_send,
    pt_socket_recv
};

int
stmf_proxy_transport_init(char *transport, pt_ops_t **pt_ops)
{
    if (strcmp(transport, "sockets") == 0) {
        *pt_ops = &pt_socket_ops;
        return (0);
    } else {
        return (-1);
    }
}