/*- * SPDX-License-Identifier: BSD-2-Clause * * 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/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); }