common/isc/ctl_p.c

#if !defined(lint) && !defined(SABER)
static const char rcsid[] = "$Id: ctl_p.c,v 1.4 2005/04/27 04:56:35 sra Exp $";
#endif /* not lint */

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1998,1999 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* Extern. */

#include "port_before.h"

#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <netinet/in.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include <isc/assertions.h>
#include <isc/eventlib.h>
#include <isc/logging.h>
#include <isc/memcluster.h>
#include <isc/ctl.h>

#include "ctl_p.h"

#include "port_after.h"

/* Constants. */

const char * const ctl_sevnames[] = {
    "debug", "warning", "error"
};

/* Public. */

/*%
 * ctl_logger()
 *  if ctl_startup()'s caller didn't specify a logger, this one
 *  is used.  this pollutes stderr with all kinds of trash so it will
 *  probably never be used in real applications.
 */
void
ctl_logger(enum ctl_severity severity, const char *format, ...) {
    va_list ap;
    static const char me[] = "ctl_logger";

    fprintf(stderr, "%s(%s): ", me, ctl_sevnames[severity]);
    va_start(ap, format);
    vfprintf(stderr, format, ap);
    va_end(ap);
    fputc('\n', stderr);
}

int
ctl_bufget(struct ctl_buf *buf, ctl_logfunc logger) {
    static const char me[] = "ctl_bufget";

    REQUIRE(!allocated_p(*buf) && buf->used == 0U);
    buf->text = memget(MAX_LINELEN);
    if (!allocated_p(*buf)) {
        (*logger)(ctl_error, "%s: getmem: %s", me, strerror(errno));
        return (-1);
    }
    buf->used = 0;
    return (0);
}

void
ctl_bufput(struct ctl_buf *buf) {

    REQUIRE(allocated_p(*buf));
    memput(buf->text, MAX_LINELEN);
    buf->text = NULL;
    buf->used = 0;
}

const char *
ctl_sa_ntop(const struct sockaddr *sa,
        char *buf, size_t size,
        ctl_logfunc logger)
{
    static const char me[] = "ctl_sa_ntop";
    static const char punt[] = "[0].-1";
    char tmp[INET6_ADDRSTRLEN];

    switch (sa->sa_family) {
    case AF_INET6: {
        const struct sockaddr_in6 *in6 =
                    (const struct sockaddr_in6 *) sa;

        if (inet_ntop(in6->sin6_family, &in6->sin6_addr, tmp, sizeof tmp)
            == NULL) {
            (*logger)(ctl_error, "%s: inet_ntop(%u %04x): %s",
                  me, in6->sin6_family,
                  in6->sin6_port, strerror(errno));
            return (punt);
        }
        if (strlen(tmp) + sizeof "[].65535" > size) {
            (*logger)(ctl_error, "%s: buffer overflow", me);
            return (punt);
        }
        (void) sprintf(buf, "[%s].%u", tmp, ntohs(in6->sin6_port));
        return (buf);
        }
    case AF_INET: {
        const struct sockaddr_in *in =
                          (const struct sockaddr_in *) sa;

        if (inet_ntop(in->sin_family, &in->sin_addr, tmp, sizeof tmp)
            == NULL) {
            (*logger)(ctl_error, "%s: inet_ntop(%u %04x %08x): %s",
                  me, in->sin_family,
                  in->sin_port, in->sin_addr.s_addr,
                  strerror(errno));
            return (punt);
        }
        if (strlen(tmp) + sizeof "[].65535" > size) {
            (*logger)(ctl_error, "%s: buffer overflow", me);
            return (punt);
        }
        (void) sprintf(buf, "[%s].%u", tmp, ntohs(in->sin_port));
        return (buf);
        }
#ifndef NO_SOCKADDR_UN
    case AF_UNIX: {
        const struct sockaddr_un *un =
                          (const struct sockaddr_un *) sa;
        unsigned int x = sizeof un->sun_path;

        if (x > size)
            x = size;
        strncpy(buf, un->sun_path, x - 1);
        buf[x - 1] = '\0';
        return (buf);
        }
#endif
    default:
        return (punt);
    }
}

void
ctl_sa_copy(const struct sockaddr *src, struct sockaddr *dst) {
    switch (src->sa_family) {
    case AF_INET6:
        *((struct sockaddr_in6 *)dst) =
                     *((const struct sockaddr_in6 *)src);
        break;
    case AF_INET:
        *((struct sockaddr_in *)dst) =
                      *((const struct sockaddr_in *)src);
        break;
#ifndef NO_SOCKADDR_UN
    case AF_UNIX:
        *((struct sockaddr_un *)dst) =
                      *((const struct sockaddr_un *)src);
        break;
#endif
    default:
        *dst = *src;
        break;
    }
}

/*! \file */