/*
 * 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 */