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- /*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2000-2001 Boris Popov
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include <sys/cdefs.h>
- __FBSDID("$FreeBSD$");
- #include <sys/param.h>
- #include <sys/systm.h>
- #include <sys/kernel.h>
- #include <sys/iconv.h>
- #include <sys/malloc.h>
- #include <sys/mount.h>
- #include <sys/sx.h>
- #include <sys/syslog.h>
- #include "iconv_converter_if.h"
- SYSCTL_DECL(_kern_iconv);
- SYSCTL_NODE(_kern, OID_AUTO, iconv, CTLFLAG_RW | CTLFLAG_MPSAFE, NULL,
- "kernel iconv interface");
- MALLOC_DEFINE(M_ICONV, "iconv", "ICONV structures");
- static MALLOC_DEFINE(M_ICONVDATA, "iconv_data", "ICONV data");
- MODULE_VERSION(libiconv, 2);
- static struct sx iconv_lock;
- #ifdef notnow
- /*
- * iconv converter instance
- */
- struct iconv_converter {
- KOBJ_FIELDS;
- void * c_data;
- };
- #endif
- struct sysctl_oid *iconv_oid_hook = &sysctl___kern_iconv;
- /*
- * List of loaded converters
- */
- static TAILQ_HEAD(iconv_converter_list, iconv_converter_class)
- iconv_converters = TAILQ_HEAD_INITIALIZER(iconv_converters);
- /*
- * List of supported/loaded charsets pairs
- */
- static TAILQ_HEAD(, iconv_cspair)
- iconv_cslist = TAILQ_HEAD_INITIALIZER(iconv_cslist);
- static int iconv_csid = 1;
- static char iconv_unicode_string[] = "unicode"; /* save eight bytes when possible */
- static void iconv_unregister_cspair(struct iconv_cspair *csp);
- static int
- iconv_mod_unload(void)
- {
- struct iconv_cspair *csp;
- sx_xlock(&iconv_lock);
- TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
- if (csp->cp_refcount) {
- sx_xunlock(&iconv_lock);
- return EBUSY;
- }
- }
- while ((csp = TAILQ_FIRST(&iconv_cslist)) != NULL)
- iconv_unregister_cspair(csp);
- sx_xunlock(&iconv_lock);
- sx_destroy(&iconv_lock);
- return 0;
- }
- static int
- iconv_mod_handler(module_t mod, int type, void *data)
- {
- int error;
- switch (type) {
- case MOD_LOAD:
- error = 0;
- sx_init(&iconv_lock, "iconv");
- break;
- case MOD_UNLOAD:
- error = iconv_mod_unload();
- break;
- default:
- error = EINVAL;
- }
- return error;
- }
- static moduledata_t iconv_mod = {
- "iconv", iconv_mod_handler, NULL
- };
- DECLARE_MODULE(iconv, iconv_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND);
- static int
- iconv_register_converter(struct iconv_converter_class *dcp)
- {
- kobj_class_compile((struct kobj_class*)dcp);
- dcp->refs++;
- TAILQ_INSERT_TAIL(&iconv_converters, dcp, cc_link);
- return 0;
- }
- static int
- iconv_unregister_converter(struct iconv_converter_class *dcp)
- {
- dcp->refs--;
- if (dcp->refs > 1) {
- ICDEBUG("converter has %d references left\n", dcp->refs);
- return EBUSY;
- }
- TAILQ_REMOVE(&iconv_converters, dcp, cc_link);
- kobj_class_free((struct kobj_class*)dcp);
- return 0;
- }
- static int
- iconv_lookupconv(const char *name, struct iconv_converter_class **dcpp)
- {
- struct iconv_converter_class *dcp;
- TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
- if (name == NULL)
- continue;
- if (strcmp(name, ICONV_CONVERTER_NAME(dcp)) == 0) {
- if (dcpp)
- *dcpp = dcp;
- return 0;
- }
- }
- return ENOENT;
- }
- static int
- iconv_lookupcs(const char *to, const char *from, struct iconv_cspair **cspp)
- {
- struct iconv_cspair *csp;
- TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
- if (strcasecmp(csp->cp_to, to) == 0 &&
- strcasecmp(csp->cp_from, from) == 0) {
- if (cspp)
- *cspp = csp;
- return 0;
- }
- }
- return ENOENT;
- }
- static int
- iconv_register_cspair(const char *to, const char *from,
- struct iconv_converter_class *dcp, void *data,
- struct iconv_cspair **cspp)
- {
- struct iconv_cspair *csp;
- char *cp;
- int csize, ucsto, ucsfrom;
- if (iconv_lookupcs(to, from, NULL) == 0)
- return EEXIST;
- csize = sizeof(*csp);
- ucsto = strcmp(to, iconv_unicode_string) == 0;
- if (!ucsto)
- csize += strlen(to) + 1;
- ucsfrom = strcmp(from, iconv_unicode_string) == 0;
- if (!ucsfrom)
- csize += strlen(from) + 1;
- csp = malloc(csize, M_ICONV, M_WAITOK);
- bzero(csp, csize);
- csp->cp_id = iconv_csid++;
- csp->cp_dcp = dcp;
- cp = (char*)(csp + 1);
- if (!ucsto) {
- strcpy(cp, to);
- csp->cp_to = cp;
- cp += strlen(cp) + 1;
- } else
- csp->cp_to = iconv_unicode_string;
- if (!ucsfrom) {
- strcpy(cp, from);
- csp->cp_from = cp;
- } else
- csp->cp_from = iconv_unicode_string;
- csp->cp_data = data;
- TAILQ_INSERT_TAIL(&iconv_cslist, csp, cp_link);
- *cspp = csp;
- return 0;
- }
- static void
- iconv_unregister_cspair(struct iconv_cspair *csp)
- {
- TAILQ_REMOVE(&iconv_cslist, csp, cp_link);
- if (csp->cp_data)
- free(csp->cp_data, M_ICONVDATA);
- free(csp, M_ICONV);
- }
- /*
- * Lookup and create an instance of converter.
- * Currently this layer didn't have associated 'instance' structure
- * to avoid unnesessary memory allocation.
- */
- int
- iconv_open(const char *to, const char *from, void **handle)
- {
- struct iconv_cspair *csp, *cspfrom, *cspto;
- struct iconv_converter_class *dcp;
- const char *cnvname;
- int error;
- /*
- * First, lookup fully qualified cspairs
- */
- error = iconv_lookupcs(to, from, &csp);
- if (error == 0)
- return ICONV_CONVERTER_OPEN(csp->cp_dcp, csp, NULL, handle);
- /*
- * Well, nothing found. Now try to construct a composite conversion
- * ToDo: add a 'capability' field to converter
- */
- TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
- cnvname = ICONV_CONVERTER_NAME(dcp);
- if (cnvname == NULL)
- continue;
- error = iconv_lookupcs(cnvname, from, &cspfrom);
- if (error)
- continue;
- error = iconv_lookupcs(to, cnvname, &cspto);
- if (error)
- continue;
- /*
- * Fine, we're found a pair which can be combined together
- */
- return ICONV_CONVERTER_OPEN(dcp, cspto, cspfrom, handle);
- }
- return ENOENT;
- }
- int
- iconv_close(void *handle)
- {
- return ICONV_CONVERTER_CLOSE(handle);
- }
- int
- iconv_conv(void *handle, const char **inbuf,
- size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
- {
- return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 0, 0);
- }
- int
- iconv_conv_case(void *handle, const char **inbuf,
- size_t *inbytesleft, char **outbuf, size_t *outbytesleft, int casetype)
- {
- return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 0, casetype);
- }
- int
- iconv_convchr(void *handle, const char **inbuf,
- size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
- {
- return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 1, 0);
- }
- int
- iconv_convchr_case(void *handle, const char **inbuf,
- size_t *inbytesleft, char **outbuf, size_t *outbytesleft, int casetype)
- {
- return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft, 1, casetype);
- }
- int
- towlower(int c, void *handle)
- {
- return ICONV_CONVERTER_TOLOWER(handle, c);
- }
- int
- towupper(int c, void *handle)
- {
- return ICONV_CONVERTER_TOUPPER(handle, c);
- }
- /*
- * Give a list of loaded converters. Each name terminated with 0.
- * An empty string terminates the list.
- */
- static int
- iconv_sysctl_drvlist(SYSCTL_HANDLER_ARGS)
- {
- struct iconv_converter_class *dcp;
- const char *name;
- char spc;
- int error;
- error = 0;
- sx_slock(&iconv_lock);
- TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
- name = ICONV_CONVERTER_NAME(dcp);
- if (name == NULL)
- continue;
- error = SYSCTL_OUT(req, name, strlen(name) + 1);
- if (error)
- break;
- }
- sx_sunlock(&iconv_lock);
- if (error)
- return error;
- spc = 0;
- error = SYSCTL_OUT(req, &spc, sizeof(spc));
- return error;
- }
- SYSCTL_PROC(_kern_iconv, OID_AUTO, drvlist,
- CTLFLAG_RD | CTLTYPE_OPAQUE | CTLFLAG_MPSAFE, NULL, 0,
- iconv_sysctl_drvlist, "S,xlat",
- "registered converters");
- /*
- * List all available charset pairs.
- */
- static int
- iconv_sysctl_cslist(SYSCTL_HANDLER_ARGS)
- {
- struct iconv_cspair *csp;
- struct iconv_cspair_info csi;
- int error;
- error = 0;
- bzero(&csi, sizeof(csi));
- csi.cs_version = ICONV_CSPAIR_INFO_VER;
- sx_slock(&iconv_lock);
- TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
- csi.cs_id = csp->cp_id;
- csi.cs_refcount = csp->cp_refcount;
- csi.cs_base = csp->cp_base ? csp->cp_base->cp_id : 0;
- strcpy(csi.cs_to, csp->cp_to);
- strcpy(csi.cs_from, csp->cp_from);
- error = SYSCTL_OUT(req, &csi, sizeof(csi));
- if (error)
- break;
- }
- sx_sunlock(&iconv_lock);
- return error;
- }
- SYSCTL_PROC(_kern_iconv, OID_AUTO, cslist,
- CTLFLAG_RD | CTLTYPE_OPAQUE | CTLFLAG_MPSAFE, NULL, 0,
- iconv_sysctl_cslist, "S,xlat",
- "registered charset pairs");
- int
- iconv_add(const char *converter, const char *to, const char *from)
- {
- struct iconv_converter_class *dcp;
- struct iconv_cspair *csp;
- if (iconv_lookupconv(converter, &dcp) != 0)
- return EINVAL;
- return iconv_register_cspair(to, from, dcp, NULL, &csp);
- }
- /*
- * Add new charset pair
- */
- static int
- iconv_sysctl_add(SYSCTL_HANDLER_ARGS)
- {
- struct iconv_converter_class *dcp;
- struct iconv_cspair *csp;
- struct iconv_add_in din;
- struct iconv_add_out dout;
- int error;
- error = SYSCTL_IN(req, &din, sizeof(din));
- if (error)
- return error;
- if (din.ia_version != ICONV_ADD_VER)
- return EINVAL;
- if (din.ia_datalen > ICONV_CSMAXDATALEN)
- return EINVAL;
- if (strnlen(din.ia_from, sizeof(din.ia_from)) >= ICONV_CSNMAXLEN)
- return EINVAL;
- if (strnlen(din.ia_to, sizeof(din.ia_to)) >= ICONV_CSNMAXLEN)
- return EINVAL;
- if (strnlen(din.ia_converter, sizeof(din.ia_converter)) >= ICONV_CNVNMAXLEN)
- return EINVAL;
- if (iconv_lookupconv(din.ia_converter, &dcp) != 0)
- return EINVAL;
- sx_xlock(&iconv_lock);
- error = iconv_register_cspair(din.ia_to, din.ia_from, dcp, NULL, &csp);
- if (error) {
- sx_xunlock(&iconv_lock);
- return error;
- }
- if (din.ia_datalen) {
- csp->cp_data = malloc(din.ia_datalen, M_ICONVDATA, M_WAITOK);
- error = copyin(din.ia_data, csp->cp_data, din.ia_datalen);
- if (error)
- goto bad;
- }
- dout.ia_csid = csp->cp_id;
- error = SYSCTL_OUT(req, &dout, sizeof(dout));
- if (error)
- goto bad;
- sx_xunlock(&iconv_lock);
- ICDEBUG("%s => %s, %d bytes\n",din.ia_from, din.ia_to, din.ia_datalen);
- return 0;
- bad:
- iconv_unregister_cspair(csp);
- sx_xunlock(&iconv_lock);
- return error;
- }
- SYSCTL_PROC(_kern_iconv, OID_AUTO, add,
- CTLFLAG_RW | CTLTYPE_OPAQUE | CTLFLAG_MPSAFE, NULL, 0,
- iconv_sysctl_add, "S,xlat",
- "register charset pair");
- /*
- * Default stubs for converters
- */
- int
- iconv_converter_initstub(struct iconv_converter_class *dp)
- {
- return 0;
- }
- int
- iconv_converter_donestub(struct iconv_converter_class *dp)
- {
- return 0;
- }
- int
- iconv_converter_tolowerstub(int c, void *handle)
- {
- return (c);
- }
- int
- iconv_converter_handler(module_t mod, int type, void *data)
- {
- struct iconv_converter_class *dcp = data;
- int error;
- switch (type) {
- case MOD_LOAD:
- sx_xlock(&iconv_lock);
- error = iconv_register_converter(dcp);
- if (error) {
- sx_xunlock(&iconv_lock);
- break;
- }
- error = ICONV_CONVERTER_INIT(dcp);
- if (error)
- iconv_unregister_converter(dcp);
- sx_xunlock(&iconv_lock);
- break;
- case MOD_UNLOAD:
- sx_xlock(&iconv_lock);
- ICONV_CONVERTER_DONE(dcp);
- error = iconv_unregister_converter(dcp);
- sx_xunlock(&iconv_lock);
- break;
- default:
- error = EINVAL;
- }
- return error;
- }
- /*
- * Common used functions (don't use with unicode)
- */
- char *
- iconv_convstr(void *handle, char *dst, const char *src)
- {
- char *p = dst;
- size_t inlen, outlen;
- int error;
- if (handle == NULL) {
- strcpy(dst, src);
- return dst;
- }
- inlen = outlen = strlen(src);
- error = iconv_conv(handle, NULL, NULL, &p, &outlen);
- if (error)
- return NULL;
- error = iconv_conv(handle, &src, &inlen, &p, &outlen);
- if (error)
- return NULL;
- *p = 0;
- return dst;
- }
- void *
- iconv_convmem(void *handle, void *dst, const void *src, int size)
- {
- const char *s = src;
- char *d = dst;
- size_t inlen, outlen;
- int error;
- if (size == 0)
- return dst;
- if (handle == NULL) {
- memcpy(dst, src, size);
- return dst;
- }
- inlen = outlen = size;
- error = iconv_conv(handle, NULL, NULL, &d, &outlen);
- if (error)
- return NULL;
- error = iconv_conv(handle, &s, &inlen, &d, &outlen);
- if (error)
- return NULL;
- return dst;
- }
- int
- iconv_lookupcp(char **cpp, const char *s)
- {
- if (cpp == NULL) {
- ICDEBUG("warning a NULL list passed\n", "");
- return ENOENT;
- }
- for (; *cpp; cpp++)
- if (strcmp(*cpp, s) == 0)
- return 0;
- return ENOENT;
- }
- /*
- * Return if fsname is in use of not
- */
- int
- iconv_vfs_refcount(const char *fsname)
- {
- struct vfsconf *vfsp;
- vfsp = vfs_byname(fsname);
- if (vfsp != NULL && vfsp->vfc_refcount > 0)
- return (EBUSY);
- return (0);
- }
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