mirror of https://gitee.com/openkylin/linux.git
505 lines
11 KiB
C
505 lines
11 KiB
C
/*
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* names.c -- USB name database manipulation routines
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*
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* Copyright (C) 1999, 2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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*
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*
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*
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* Copyright (C) 2005 Takahiro Hirofuchi
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* - names_deinit() is added.
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <dirent.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "names.h"
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#include "usbip_common.h"
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struct vendor {
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struct vendor *next;
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u_int16_t vendorid;
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char name[1];
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};
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struct product {
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struct product *next;
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u_int16_t vendorid, productid;
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char name[1];
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};
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struct class {
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struct class *next;
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u_int8_t classid;
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char name[1];
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};
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struct subclass {
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struct subclass *next;
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u_int8_t classid, subclassid;
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char name[1];
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};
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struct protocol {
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struct protocol *next;
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u_int8_t classid, subclassid, protocolid;
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char name[1];
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};
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struct genericstrtable {
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struct genericstrtable *next;
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unsigned int num;
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char name[1];
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};
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#define HASH1 0x10
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#define HASH2 0x02
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#define HASHSZ 16
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static unsigned int hashnum(unsigned int num)
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{
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unsigned int mask1 = HASH1 << 27, mask2 = HASH2 << 27;
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for (; mask1 >= HASH1; mask1 >>= 1, mask2 >>= 1)
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if (num & mask1)
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num ^= mask2;
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return num & (HASHSZ-1);
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}
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static struct vendor *vendors[HASHSZ] = { NULL, };
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static struct product *products[HASHSZ] = { NULL, };
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static struct class *classes[HASHSZ] = { NULL, };
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static struct subclass *subclasses[HASHSZ] = { NULL, };
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static struct protocol *protocols[HASHSZ] = { NULL, };
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const char *names_vendor(u_int16_t vendorid)
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{
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struct vendor *v;
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v = vendors[hashnum(vendorid)];
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for (; v; v = v->next)
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if (v->vendorid == vendorid)
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return v->name;
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return NULL;
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}
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const char *names_product(u_int16_t vendorid, u_int16_t productid)
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{
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struct product *p;
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p = products[hashnum((vendorid << 16) | productid)];
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for (; p; p = p->next)
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if (p->vendorid == vendorid && p->productid == productid)
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return p->name;
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return NULL;
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}
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const char *names_class(u_int8_t classid)
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{
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struct class *c;
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c = classes[hashnum(classid)];
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for (; c; c = c->next)
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if (c->classid == classid)
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return c->name;
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return NULL;
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}
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const char *names_subclass(u_int8_t classid, u_int8_t subclassid)
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{
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struct subclass *s;
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s = subclasses[hashnum((classid << 8) | subclassid)];
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for (; s; s = s->next)
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if (s->classid == classid && s->subclassid == subclassid)
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return s->name;
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return NULL;
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}
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const char *names_protocol(u_int8_t classid, u_int8_t subclassid,
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u_int8_t protocolid)
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{
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struct protocol *p;
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p = protocols[hashnum((classid << 16) | (subclassid << 8)
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| protocolid)];
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for (; p; p = p->next)
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if (p->classid == classid && p->subclassid == subclassid &&
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p->protocolid == protocolid)
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return p->name;
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return NULL;
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}
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/* add a cleanup function by takahiro */
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struct pool {
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struct pool *next;
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void *mem;
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};
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static struct pool *pool_head;
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static void *my_malloc(size_t size)
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{
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struct pool *p;
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p = calloc(1, sizeof(struct pool));
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if (!p)
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return NULL;
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p->mem = calloc(1, size);
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if (!p->mem) {
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free(p);
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return NULL;
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}
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p->next = pool_head;
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pool_head = p;
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return p->mem;
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}
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void names_free(void)
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{
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struct pool *pool;
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if (!pool_head)
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return;
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for (pool = pool_head; pool != NULL; ) {
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struct pool *tmp;
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if (pool->mem)
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free(pool->mem);
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tmp = pool;
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pool = pool->next;
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free(tmp);
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}
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}
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static int new_vendor(const char *name, u_int16_t vendorid)
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{
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struct vendor *v;
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unsigned int h = hashnum(vendorid);
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v = vendors[h];
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for (; v; v = v->next)
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if (v->vendorid == vendorid)
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return -1;
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v = my_malloc(sizeof(struct vendor) + strlen(name));
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if (!v)
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return -1;
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strcpy(v->name, name);
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v->vendorid = vendorid;
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v->next = vendors[h];
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vendors[h] = v;
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return 0;
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}
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static int new_product(const char *name, u_int16_t vendorid,
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u_int16_t productid)
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{
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struct product *p;
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unsigned int h = hashnum((vendorid << 16) | productid);
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p = products[h];
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for (; p; p = p->next)
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if (p->vendorid == vendorid && p->productid == productid)
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return -1;
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p = my_malloc(sizeof(struct product) + strlen(name));
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if (!p)
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return -1;
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strcpy(p->name, name);
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p->vendorid = vendorid;
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p->productid = productid;
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p->next = products[h];
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products[h] = p;
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return 0;
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}
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static int new_class(const char *name, u_int8_t classid)
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{
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struct class *c;
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unsigned int h = hashnum(classid);
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c = classes[h];
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for (; c; c = c->next)
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if (c->classid == classid)
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return -1;
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c = my_malloc(sizeof(struct class) + strlen(name));
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if (!c)
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return -1;
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strcpy(c->name, name);
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c->classid = classid;
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c->next = classes[h];
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classes[h] = c;
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return 0;
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}
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static int new_subclass(const char *name, u_int8_t classid, u_int8_t subclassid)
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{
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struct subclass *s;
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unsigned int h = hashnum((classid << 8) | subclassid);
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s = subclasses[h];
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for (; s; s = s->next)
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if (s->classid == classid && s->subclassid == subclassid)
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return -1;
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s = my_malloc(sizeof(struct subclass) + strlen(name));
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if (!s)
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return -1;
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strcpy(s->name, name);
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s->classid = classid;
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s->subclassid = subclassid;
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s->next = subclasses[h];
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subclasses[h] = s;
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return 0;
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}
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static int new_protocol(const char *name, u_int8_t classid, u_int8_t subclassid,
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u_int8_t protocolid)
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{
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struct protocol *p;
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unsigned int h = hashnum((classid << 16) | (subclassid << 8)
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| protocolid);
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p = protocols[h];
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for (; p; p = p->next)
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if (p->classid == classid && p->subclassid == subclassid
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&& p->protocolid == protocolid)
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return -1;
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p = my_malloc(sizeof(struct protocol) + strlen(name));
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if (!p)
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return -1;
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strcpy(p->name, name);
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p->classid = classid;
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p->subclassid = subclassid;
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p->protocolid = protocolid;
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p->next = protocols[h];
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protocols[h] = p;
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return 0;
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}
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static void parse(FILE *f)
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{
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char buf[512], *cp;
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unsigned int linectr = 0;
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int lastvendor = -1;
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int lastclass = -1;
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int lastsubclass = -1;
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int lasthut = -1;
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int lastlang = -1;
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unsigned int u;
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while (fgets(buf, sizeof(buf), f)) {
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linectr++;
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/* remove line ends */
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cp = strchr(buf, '\r');
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if (cp)
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*cp = 0;
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cp = strchr(buf, '\n');
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if (cp)
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*cp = 0;
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if (buf[0] == '#' || !buf[0])
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continue;
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cp = buf;
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if (buf[0] == 'P' && buf[1] == 'H' && buf[2] == 'Y' &&
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buf[3] == 'S' && buf[4] == 'D' &&
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buf[5] == 'E' && buf[6] == 'S' && /*isspace(buf[7])*/
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buf[7] == ' ') {
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continue;
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}
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if (buf[0] == 'P' && buf[1] == 'H' &&
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buf[2] == 'Y' && /*isspace(buf[3])*/ buf[3] == ' ') {
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continue;
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}
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if (buf[0] == 'B' && buf[1] == 'I' && buf[2] == 'A' &&
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buf[3] == 'S' && /*isspace(buf[4])*/ buf[4] == ' ') {
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continue;
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}
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if (buf[0] == 'L' && /*isspace(buf[1])*/ buf[1] == ' ') {
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lasthut = lastclass = lastvendor = lastsubclass = -1;
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/*
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* set 1 as pseudo-id to indicate that the parser is
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* in a `L' section.
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*/
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lastlang = 1;
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continue;
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}
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if (buf[0] == 'C' && /*isspace(buf[1])*/ buf[1] == ' ') {
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/* class spec */
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cp = buf+2;
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while (isspace(*cp))
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cp++;
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if (!isxdigit(*cp)) {
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err("Invalid class spec at line %u", linectr);
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continue;
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}
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u = strtoul(cp, &cp, 16);
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while (isspace(*cp))
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cp++;
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if (!*cp) {
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err("Invalid class spec at line %u", linectr);
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continue;
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}
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if (new_class(cp, u))
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err("Duplicate class spec at line %u class %04x %s",
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linectr, u, cp);
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dbg("line %5u class %02x %s", linectr, u, cp);
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lasthut = lastlang = lastvendor = lastsubclass = -1;
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lastclass = u;
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continue;
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}
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if (buf[0] == 'A' && buf[1] == 'T' && isspace(buf[2])) {
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/* audio terminal type spec */
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continue;
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}
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if (buf[0] == 'H' && buf[1] == 'C' && buf[2] == 'C'
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&& isspace(buf[3])) {
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/* HID Descriptor bCountryCode */
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continue;
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}
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if (isxdigit(*cp)) {
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/* vendor */
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u = strtoul(cp, &cp, 16);
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while (isspace(*cp))
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cp++;
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if (!*cp) {
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err("Invalid vendor spec at line %u", linectr);
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continue;
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}
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if (new_vendor(cp, u))
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err("Duplicate vendor spec at line %u vendor %04x %s",
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linectr, u, cp);
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dbg("line %5u vendor %04x %s", linectr, u, cp);
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lastvendor = u;
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lasthut = lastlang = lastclass = lastsubclass = -1;
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continue;
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}
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if (buf[0] == '\t' && isxdigit(buf[1])) {
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/* product or subclass spec */
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u = strtoul(buf+1, &cp, 16);
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while (isspace(*cp))
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cp++;
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if (!*cp) {
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err("Invalid product/subclass spec at line %u",
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linectr);
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continue;
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}
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if (lastvendor != -1) {
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if (new_product(cp, lastvendor, u))
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err("Duplicate product spec at line %u product %04x:%04x %s",
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linectr, lastvendor, u, cp);
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dbg("line %5u product %04x:%04x %s", linectr,
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lastvendor, u, cp);
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continue;
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}
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if (lastclass != -1) {
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if (new_subclass(cp, lastclass, u))
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err("Duplicate subclass spec at line %u class %02x:%02x %s",
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linectr, lastclass, u, cp);
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dbg("line %5u subclass %02x:%02x %s", linectr,
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lastclass, u, cp);
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lastsubclass = u;
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continue;
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}
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if (lasthut != -1) {
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/* do not store hut */
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continue;
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}
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if (lastlang != -1) {
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/* do not store langid */
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continue;
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}
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err("Product/Subclass spec without prior Vendor/Class spec at line %u",
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linectr);
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continue;
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}
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if (buf[0] == '\t' && buf[1] == '\t' && isxdigit(buf[2])) {
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/* protocol spec */
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u = strtoul(buf+2, &cp, 16);
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while (isspace(*cp))
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cp++;
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if (!*cp) {
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err("Invalid protocol spec at line %u",
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linectr);
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continue;
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}
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if (lastclass != -1 && lastsubclass != -1) {
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if (new_protocol(cp, lastclass, lastsubclass,
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u))
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err("Duplicate protocol spec at line %u class %02x:%02x:%02x %s",
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linectr, lastclass, lastsubclass,
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u, cp);
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dbg("line %5u protocol %02x:%02x:%02x %s",
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linectr, lastclass, lastsubclass, u, cp);
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continue;
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}
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err("Protocol spec without prior Class and Subclass spec at line %u",
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linectr);
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continue;
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}
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if (buf[0] == 'H' && buf[1] == 'I' &&
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buf[2] == 'D' && /*isspace(buf[3])*/ buf[3] == ' ') {
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continue;
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}
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if (buf[0] == 'H' && buf[1] == 'U' &&
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buf[2] == 'T' && /*isspace(buf[3])*/ buf[3] == ' ') {
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lastlang = lastclass = lastvendor = lastsubclass = -1;
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/*
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* set 1 as pseudo-id to indicate that the parser is
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* in a `HUT' section.
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*/
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lasthut = 1;
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continue;
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}
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if (buf[0] == 'R' && buf[1] == ' ')
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continue;
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if (buf[0] == 'V' && buf[1] == 'T')
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continue;
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err("Unknown line at line %u", linectr);
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}
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}
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int names_init(char *n)
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{
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FILE *f;
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f = fopen(n, "r");
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if (!f)
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return errno;
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parse(f);
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fclose(f);
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return 0;
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}
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