void
helperStatefulSubmit(statefulhelper * hlp, const char *buf, HLPSCB * callback, void *data, helper_stateful_server * srv)
{
helper_stateful_request *r = memAllocate(MEM_HELPER_STATEFUL_REQUEST);
if (hlp == NULL) {
debug(84, 3) ("helperStatefulSubmit: hlp == NULL\n");
callback(data, 0, NULL);
return;
}
r->callback = callback;
r->data = data;
if (buf)
r->buf = xstrdup(buf);
cbdataLock(r->data);
if (!srv)
srv = helperStatefulGetServer(hlp);
if (srv) {
debug(84, 5) ("helperStatefulSubmit: sever %p, buf '%s'.\n", srv, buf ? buf : "NULL");
assert(!srv->request);
assert(!srv->flags.busy);
helperStatefulDispatch(srv, r);
} else {
debug(84, 9) ("helperStatefulSubmit: enqueued, buf '%s'.\n", buf ? buf : "NULL");
StatefulEnqueue(hlp, r);
}
}
static void
mimeLoadIconFile(const char *icon)
{
int fd;
int n;
request_flags flags;
struct stat sb;
StoreEntry *e;
LOCAL_ARRAY(char, path, MAXPATHLEN);
LOCAL_ARRAY(char, url, MAX_URL);
char *buf;
const char *type = mimeGetContentType(icon);
HttpReply *reply;
if (type == NULL)
fatal("Unknown icon format while reading mime.conf\n");
buf = internalLocalUri("/squid-internal-static/icons/", icon);
xstrncpy(url, buf, MAX_URL);
if (storeGetPublic(url, METHOD_GET))
return;
snprintf(path, MAXPATHLEN, "%s/%s", Config.icons.directory, icon);
fd = file_open(path, O_RDONLY);
if (fd < 0) {
debug(25, 0) ("mimeLoadIconFile: %s: %s\n", path, xstrerror());
return;
}
if (fstat(fd, &sb) < 0) {
debug(50, 0) ("mimeLoadIconFile: FD %d: fstat: %s\n", fd, xstrerror());
return;
}
flags = null_request_flags;
flags.cachable = 1;
e = storeCreateEntry(url,
url,
flags,
METHOD_GET);
assert(e != NULL);
storeSetPublicKey(e);
storeBuffer(e);
e->mem_obj->request = requestLink(urlParse(METHOD_GET, url));
httpReplyReset(reply = e->mem_obj->reply);
httpReplySetHeaders(reply, 1.0, HTTP_OK, NULL,
type, (int) sb.st_size, sb.st_mtime, -1);
reply->cache_control = httpHdrCcCreate();
httpHdrCcSetMaxAge(reply->cache_control, 86400);
httpHeaderPutCc(&reply->header, reply->cache_control);
httpReplySwapOut(reply, e);
reply->hdr_sz = e->mem_obj->inmem_hi; /* yuk */
/* read the file into the buffer and append it to store */
buf = memAllocate(MEM_4K_BUF);
while ((n = read(fd, buf, 4096)) > 0)
storeAppend(e, buf, n);
file_close(fd);
EBIT_SET(e->flags, ENTRY_SPECIAL);
storeBufferFlush(e);
storeComplete(e);
storeTimestampsSet(e);
debug(25, 3) ("Loaded icon %s\n", url);
storeUnlockObject(e);
memFree(buf, MEM_4K_BUF);
}
void
netdbBinaryExchange(StoreEntry * s)
{
http_reply *reply = s->mem_obj->reply;
#if USE_ICMP
netdbEntry *n;
int i;
int j;
int rec_sz;
char *buf;
struct in_addr addr;
storeBuffer(s);
httpReplyReset(reply);
httpReplySetHeaders(reply, HTTP_OK, "OK", NULL, -1, squid_curtime, -1);
httpReplySwapOut(reply, s);
rec_sz = 0;
rec_sz += 1 + sizeof(addr.s_addr);
rec_sz += 1 + sizeof(int);
rec_sz += 1 + sizeof(int);
buf = memAllocate(MEM_4K_BUF);
i = 0;
hash_first(addr_table);
while ((n = (netdbEntry *) hash_next(addr_table))) {
if (0.0 == n->rtt)
continue;
if (n->rtt > 60000) /* RTT > 1 MIN probably bogus */
continue;
if (!safe_inet_addr(n->network, &addr))
continue;
buf[i++] = (char) NETDB_EX_NETWORK;
xmemcpy(&buf[i], &addr.s_addr, sizeof(addr.s_addr));
i += sizeof(addr.s_addr);
buf[i++] = (char) NETDB_EX_RTT;
j = htonl((int) (n->rtt * 1000));
xmemcpy(&buf[i], &j, sizeof(int));
i += sizeof(int);
buf[i++] = (char) NETDB_EX_HOPS;
j = htonl((int) (n->hops * 1000));
xmemcpy(&buf[i], &j, sizeof(int));
i += sizeof(int);
if (i + rec_sz > 4096) {
storeAppend(s, buf, i);
i = 0;
}
}
if (i > 0) {
storeAppend(s, buf, i);
i = 0;
}
assert(0 == i);
storeBufferFlush(s);
memFree(buf, MEM_4K_BUF);
#else
httpReplyReset(reply);
httpReplySetHeaders(reply, HTTP_BAD_REQUEST, "Bad Request", NULL, -1, -1, -1);
httpReplySwapOut(reply, s);
storeAppendPrintf(s, "NETDB support not compiled into this Squid cache.\n");
#endif
storeComplete(s);
}
const cache_key *
storeKeyDup(const cache_key * key)
{
cache_key *dup = memAllocate(MEM_MD5_DIGEST);
xmemcpy(dup, key, MD5_DIGEST_CHARS);
return dup;
}
static void
asnCacheStart(int as)
{
LOCAL_ARRAY(char, asres, 4096);
StoreEntry *e;
request_t *req;
ASState *asState;
asState = cbdataAlloc(ASState);
debug(53, 3) ("asnCacheStart: AS %d\n", as);
snprintf(asres, 4096, "whois://%s/!gAS%d", Config.as_whois_server, as);
asState->as_number = as;
req = urlParse(METHOD_GET, asres);
assert(NULL != req);
asState->request = requestLink(req);
if ((e = storeGetPublic(asres, METHOD_GET)) == NULL) {
e = storeCreateEntry(asres, asres, null_request_flags, METHOD_GET);
asState->sc = storeClientRegister(e, asState);
fwdStart(-1, e, asState->request);
} else {
storeLockObject(e);
asState->sc = storeClientRegister(e, asState);
}
asState->entry = e;
asState->seen = 0;
asState->offset = 0;
storeClientCopy(asState->sc,
e,
asState->seen,
asState->offset,
4096,
memAllocate(MEM_4K_BUF),
asHandleReply,
asState);
}
void
netdbExchangeStart(void *data)
{
#if USE_ICMP
peer *p = data;
char *uri;
netdbExchangeState *ex;
CBDATA_INIT_TYPE(netdbExchangeState);
ex = cbdataAlloc(netdbExchangeState);
cbdataLock(p);
ex->p = p;
uri = internalRemoteUri(p->host, p->http_port, "/squid-internal-dynamic/", "netdb");
debug(38, 3) ("netdbExchangeStart: Requesting '%s'\n", uri);
assert(NULL != uri);
ex->r = urlParse(METHOD_GET, uri);
if (NULL == ex->r) {
debug(38, 1) ("netdbExchangeStart: Bad URI %s\n", uri);
return;
}
requestLink(ex->r);
assert(NULL != ex->r);
httpBuildVersion(&ex->r->http_ver, 1, 0);
ex->e = storeCreateEntry(uri, uri, null_request_flags, METHOD_GET);
ex->buf_sz = 4096;
ex->buf = memAllocate(MEM_4K_BUF);
assert(NULL != ex->e);
ex->sc = storeClientRegister(ex->e, ex);
storeClientCopy(ex->sc, ex->e, ex->seen, ex->used, ex->buf_sz,
ex->buf, netdbExchangeHandleReply, ex);
ex->r->flags.loopdetect = 1; /* cheat! -- force direct */
if (p->login)
xstrncpy(ex->r->login, p->login, MAX_LOGIN_SZ);
fwdStart(-1, ex->e, ex->r);
#endif
}
/* add client with fd to client list */
void
storeClientListAdd(StoreEntry * e, void *data)
{
MemObject *mem = e->mem_obj;
store_client **T;
store_client *sc;
assert(mem);
if (storeClientListSearch(mem, data) != NULL)
return;
e->refcount++;
mem->nclients++;
sc = memAllocate(MEM_STORE_CLIENT);
cbdataAdd(sc, memFree, MEM_STORE_CLIENT); /* sc is callback_data for file_read */
cbdataLock(data); /* locked while we point to it */
sc->callback_data = data;
sc->seen_offset = 0;
sc->copy_offset = 0;
sc->flags.disk_io_pending = 0;
sc->entry = e;
sc->type = storeClientType(e);
if (sc->type == STORE_DISK_CLIENT)
/* assert we'll be able to get the data we want */
/* maybe we should open swapin_fd here */
assert(e->swap_file_number > -1 || storeSwapOutAble(e));
for (T = &mem->clients; *T; T = &(*T)->next);
*T = sc;
#if DELAY_POOLS
sc->delay_id = 0;
#endif
}
HttpHdrRange *
httpHdrRangeCreate(void)
{
HttpHdrRange *r = memAllocate(MEM_HTTP_HDR_RANGE);
stackInit(&r->specs);
return r;
}
HttpReply *
httpReplyCreate(void)
{
HttpReply *rep = memAllocate(MEM_HTTP_REPLY);
debug(58, 7) ("creating rep: %p\n", rep);
httpReplyInit(rep);
return rep;
}
HttpHdrContRange *
httpHdrContRangeCreate(void)
{
HttpHdrContRange *r = memAllocate(MEM_HTTP_HDR_CONTENT_RANGE);
r->spec.offset = r->spec.length = range_spec_unknown;
r->elength = range_spec_unknown;
return r;
}
CacheDigest *
cacheDigestCreate(int capacity, int bpe)
{
CacheDigest *cd = memAllocate(MEM_CACHE_DIGEST);
assert(SQUID_MD5_DIGEST_LENGTH == 16); /* our hash functions rely on 16 byte keys */
cacheDigestInit(cd, capacity, bpe);
return cd;
}
void
urnStart(request_t * r, StoreEntry * e)
{
LOCAL_ARRAY(char, urlres, 4096);
request_t *urlres_r = NULL;
const char *t;
char *host;
UrnState *urnState;
StoreEntry *urlres_e;
ErrorState *err;
debug(52, 3) ("urnStart: '%s'\n", storeUrl(e));
CBDATA_INIT_TYPE(UrnState);
urnState = cbdataAlloc(UrnState);
urnState->entry = e;
urnState->request = requestLink(r);
storeLockObject(urnState->entry);
if (strncasecmp(strBuf(r->urlpath), "menu.", 5) == 0) {
char *new_path = xstrdup(strBuf(r->urlpath) + 5);
urnState->flags.force_menu = 1;
stringReset(&r->urlpath, new_path);
xfree(new_path);
}
if ((t = strChr(r->urlpath, ':')) != NULL) {
strSet(r->urlpath, t, '\0');
host = xstrdup(strBuf(r->urlpath));
strSet(r->urlpath, t, ':');
} else {
host = xstrdup(strBuf(r->urlpath));
}
snprintf(urlres, 4096, "http://%s/uri-res/N2L?urn:%s", host, strBuf(r->urlpath));
safe_free(host);
urlres_r = urlParse(METHOD_GET, urlres);
if (urlres_r == NULL) {
debug(52, 3) ("urnStart: Bad uri-res URL %s\n", urlres);
err = errorCon(ERR_URN_RESOLVE, HTTP_NOT_FOUND);
err->url = xstrdup(urlres);
errorAppendEntry(e, err);
return;
}
httpHeaderPutStr(&urlres_r->header, HDR_ACCEPT, "text/plain");
if ((urlres_e = storeGetPublic(urlres, METHOD_GET)) == NULL) {
urlres_e = storeCreateEntry(urlres, urlres, null_request_flags, METHOD_GET);
urnState->sc = storeClientListAdd(urlres_e, urnState);
fwdStart(-1, urlres_e, urlres_r);
} else {
storeLockObject(urlres_e);
urnState->sc = storeClientListAdd(urlres_e, urnState);
}
urnState->urlres_e = urlres_e;
urnState->urlres_r = requestLink(urlres_r);
storeClientCopy(urnState->sc, urlres_e,
0,
0,
4096,
memAllocate(MEM_4K_BUF),
urnHandleReply,
urnState);
}
void
stmemNodeRefCreate(mem_node_ref * r)
{
assert(r->node == NULL);
r->node = memAllocate(MEM_MEM_NODE);
r->node->uses = 0;
r->node->next = NULL;
r->node->len = 4096;
r->offset = 0;
}
/* parses and inits header entry, returns new entry on success */
static HttpHeaderEntry *
httpHeaderEntryParseCreate(const char *field_start, const char *field_end)
{
HttpHeaderEntry *e;
int id;
/* note: name_start == field_start */
const char *name_end = strchr(field_start, ':');
const int name_len = name_end ? name_end - field_start : 0;
const char *value_start = field_start + name_len + 1; /* skip ':' */
/* note: value_end == field_end */
HeaderEntryParsedCount++;
/* do we have a valid field name within this field? */
if (!name_len || name_end > field_end)
return NULL;
if (name_len > 65536) {
/* String has a 64K limit */
debug(55, 1) ("WARNING: ignoring header name of %d bytes\n", name_len);
return NULL;
}
/* now we know we can parse it */
e = memAllocate(MEM_HTTP_HDR_ENTRY);
debug(55, 9) ("creating entry %p: near '%s'\n", e, getStringPrefix(field_start, field_end));
/* is it a "known" field? */
id = httpHeaderIdByName(field_start, name_len, Headers, HDR_ENUM_END);
if (id < 0)
id = HDR_OTHER;
assert_eid(id);
e->id = id;
/* set field name */
if (id == HDR_OTHER)
stringLimitInit(&e->name, field_start, name_len);
else
e->name = Headers[id].name;
/* trim field value */
while (value_start < field_end && xisspace(*value_start))
value_start++;
if (field_end - value_start > 65536) {
/* String has a 64K limit */
debug(55, 1) ("WARNING: ignoring '%s' header of %d bytes\n",
strBuf(e->name), (int) (field_end - value_start));
if (e->id == HDR_OTHER)
stringClean(&e->name);
memFree(e, MEM_HTTP_HDR_ENTRY);
return NULL;
}
/* set field value */
stringLimitInit(&e->value, value_start, field_end - value_start);
Headers[id].stat.seenCount++;
Headers[id].stat.aliveCount++;
debug(55, 9) ("created entry %p: '%s: %s'\n", e, strBuf(e->name), strBuf(e->value));
return e;
}
static ClientInfo *
clientdbAdd(struct in_addr addr)
{
ClientInfo *c;
c = memAllocate(MEM_CLIENT_INFO);
c->hash.key = xstrdup(inet_ntoa(addr));
c->addr = addr;
hash_join(client_table, &c->hash);
statCounter.client_http.clients++;
return c;
}
static netdbEntry *
netdbAdd(struct in_addr addr)
{
netdbEntry *n;
if (memInUse(MEM_NETDBENTRY) > Config.Netdb.high)
netdbPurgeLRU();
if ((n = netdbLookupAddr(addr)) == NULL) {
n = memAllocate(MEM_NETDBENTRY);
netdbHashInsert(n, addr);
}
return n;
}
static void
netdbHostInsert(netdbEntry * n, const char *hostname)
{
net_db_name *x = memAllocate(MEM_NET_DB_NAME);
x->hash.key = xstrdup(hostname);
x->next = n->hosts;
n->hosts = x;
x->net_db_entry = n;
assert(hash_lookup(host_table, hostname) == NULL);
hash_join(host_table, &x->hash);
n->link_count++;
}
/* UserNameCacheAdd: add a auth_user structure to the username cache */
void
authenticateUserNameCacheAdd(auth_user_t * auth_user)
{
auth_user_hash_pointer *usernamehash;
usernamehash = memAllocate(MEM_AUTH_USER_HASH);
usernamehash->key = authenticateUserUsername(auth_user);
usernamehash->auth_user = auth_user;
hash_join(proxy_auth_username_cache, (hash_link *) usernamehash);
auth_user->usernamehash = usernamehash;
/* lock for presence in the cache */
authenticateAuthUserLock(auth_user);
}
/* allocate a variable size buffer using best-fit pool */
void *
memAllocBuf(size_t net_size, size_t * gross_size)
{
mem_type type = memFindBufSizeType(net_size, gross_size);
if (type != MEM_NONE)
return memAllocate(type);
else {
memMeterInc(HugeBufCountMeter);
memMeterAdd(HugeBufVolumeMeter, *gross_size);
return xcalloc(1, net_size);
}
}
/* allocate new peer digest, call Init, and lock everything */
PeerDigest *
peerDigestCreate(peer * p)
{
PeerDigest *pd;
assert(p);
pd = memAllocate(MEM_PEER_DIGEST);
cbdataAdd(pd, memFree, MEM_PEER_DIGEST);
peerDigestInit(pd, p);
cbdataLock(pd->peer); /* we will use the peer */
return pd;
}
auth_user_t *
authenticateAuthUserNew(const char *scheme)
{
auth_user_t *temp_auth;
temp_auth = memAllocate(MEM_AUTH_USER_T);
assert(temp_auth != NULL);
memset(temp_auth, '\0', sizeof(auth_user_t));
temp_auth->auth_type = AUTH_UNKNOWN;
temp_auth->references = 0;
temp_auth->auth_module = authenticateAuthSchemeId(scheme) + 1;
temp_auth->usernamehash = NULL;
return temp_auth;
}
static void
whoisReadReply(int fd, void *data)
{
WhoisState *p = data;
StoreEntry *entry = p->entry;
char *buf = memAllocate(MEM_4K_BUF);
MemObject *mem = entry->mem_obj;
int len;
statCounter.syscalls.sock.reads++;
len = FD_READ_METHOD(fd, buf, 4095);
buf[len] = '\0';
debug(75, 3) ("whoisReadReply: FD %d read %d bytes\n", fd, len);
debug(75, 5) ("{%s}\n", buf);
if (len > 0) {
if (0 == mem->inmem_hi) {
http_reply *reply = mem->reply;
http_version_t version;
storeBuffer(entry);
httpBuildVersion(&version, 1, 0);
httpReplySetHeaders(reply, version, HTTP_OK, "Gatewaying", "text/plain", -1, -1, -2);
httpReplySwapOut(reply, entry);
}
fd_bytes(fd, len, FD_READ);
kb_incr(&statCounter.server.all.kbytes_in, len);
kb_incr(&statCounter.server.http.kbytes_in, len);
storeAppend(entry, buf, len);
storeBufferFlush(entry);
commSetSelect(fd, COMM_SELECT_READ, whoisReadReply, p, Config.Timeout.read);
} else if (len < 0) {
debug(50, 2) ("whoisReadReply: FD %d: read failure: %s.\n",
fd, xstrerror());
if (ignoreErrno(errno)) {
commSetSelect(fd, COMM_SELECT_READ, whoisReadReply, p, Config.Timeout.read);
} else {
ErrorState *err;
err = errorCon(ERR_READ_ERROR, HTTP_INTERNAL_SERVER_ERROR, p->fwd->request);
err->xerrno = errno;
fwdFail(p->fwd, err);
comm_close(fd);
}
} else {
storeTimestampsSet(entry);
storeBufferFlush(entry);
if (!EBIT_TEST(entry->flags, RELEASE_REQUEST))
storeSetPublicKey(entry);
fwdComplete(p->fwd);
debug(75, 3) ("whoisReadReply: Done: %s\n", storeUrl(entry));
comm_close(fd);
}
memFree(buf, MEM_4K_BUF);
}
void
idnsALookup(const char *name, IDNSCB * callback, void *data)
{
idns_query *q = memAllocate(MEM_IDNS_QUERY);
q->sz = sizeof(q->buf);
q->id = rfc1035BuildAQuery(name, q->buf, &q->sz);
debug(78, 3) ("idnsALookup: buf is %d bytes for %s, id = %#hx\n",
(int) q->sz, name, q->id);
q->callback = callback;
q->callback_data = data;
cbdataLock(q->callback_data);
q->start_t = current_time;
idnsSendQuery(q);
}
void
idnsPTRLookup(const struct in_addr addr, IDNSCB * callback, void *data)
{
idns_query *q = memAllocate(MEM_IDNS_QUERY);
q->sz = sizeof(q->buf);
q->id = rfc1035BuildPTRQuery(addr, q->buf, &q->sz);
debug(78, 3) ("idnsPTRLookup: buf is %d bytes for %s, id = %#hx\n",
(int) q->sz, inet_ntoa(addr), q->id);
q->callback = callback;
q->callback_data = data;
cbdataLock(q->callback_data);
q->start_t = current_time;
idnsSendQuery(q);
}
request_t *
requestCreate(method_t method, protocol_t protocol, const char *urlpath)
{
request_t *req = memAllocate(MEM_REQUEST_T);
req->method = method;
req->protocol = protocol;
if (urlpath)
stringReset(&req->urlpath, urlpath);
req->max_forwards = -1;
req->lastmod = -1;
req->client_addr = no_addr;
req->my_addr = no_addr;
httpHeaderInit(&req->header, hoRequest);
return req;
}
static ClientInfo *
clientdbAdd(struct in_addr addr)
{
ClientInfo *c;
c = memAllocate(MEM_CLIENT_INFO);
c->hash.key = xstrdup(xinet_ntoa(addr));
c->addr = addr;
hash_join(client_table, &c->hash);
statCounter.client_http.clients++;
if ((statCounter.client_http.clients > max_clients) && !cleanup_running && cleanup_scheduled < 2) {
cleanup_scheduled++;
eventAdd("client_db garbage collector", clientdbScheduledGC, NULL, 90, 0);
}
return c;
}
/* buffer must be allocated from the caller.
* It must have at least req_len space in there.
* call handler when a reading is complete. */
void
file_read(int fd, char *buf, size_t req_len, off_t file_offset, DRCB * handler, void *client_data)
{
dread_ctrl *ctrl_dat;
assert(fd >= 0);
ctrl_dat = memAllocate(MEM_DREAD_CTRL);
ctrl_dat->fd = fd;
ctrl_dat->file_offset = file_offset;
ctrl_dat->req_len = req_len;
ctrl_dat->buf = buf;
ctrl_dat->end_of_file = 0;
ctrl_dat->handler = handler;
ctrl_dat->client_data = client_data;
cbdataLock(client_data);
diskHandleRead(fd, ctrl_dat);
}
static HttpHeaderEntry *
httpHeaderEntryCreate(http_hdr_type id, const char *name, const char *value)
{
HttpHeaderEntry *e;
assert_eid(id);
e = memAllocate(MEM_HTTP_HDR_ENTRY);
e->id = id;
if (id != HDR_OTHER)
e->name = Headers[id].name;
else
stringInit(&e->name, name);
stringInit(&e->value, value);
Headers[id].stat.aliveCount++;
debug(55, 9) ("created entry %p: '%s: %s'\n", e, strBuf(e->name), strBuf(e->value));
return e;
}
void
icmpSourcePing(struct in_addr to, const icp_common_t * header, const char *url)
{
#if USE_ICMP
char *payload;
int len;
int ulen;
debug(37, 3) ("icmpSourcePing: '%s'\n", url);
if ((ulen = strlen(url)) > MAX_URL)
return;
payload = memAllocate(MEM_8K_BUF);
len = sizeof(icp_common_t);
xmemcpy(payload, header, len);
strcpy(payload + len, url);
len += ulen + 1;
icmpSendEcho(to, S_ICMP_ICP, payload, len);
memFree(payload, MEM_8K_BUF);
#endif
}
/*
* This function has the purpose of combining multiple writes. This is
* to facilitate the ASYNC_IO option since it can only guarantee 1
* write to a file per trip around the comm.c select() loop. That's bad
* because more than 1 write can be made to the access.log file per
* trip, and so this code is purely designed to help batch multiple
* sequential writes to the access.log file. Squid will never issue
* multiple writes for any other file type during 1 trip around the
* select() loop. --SLF
*/
static void
diskCombineWrites(struct _fde_disk *fdd)
{
int len = 0;
dwrite_q *q = NULL;
dwrite_q *wq = NULL;
/*
* We need to combine multiple write requests on an FD's write
* queue But only if we don't need to seek() in between them, ugh!
* XXX This currently ignores any seeks (file_offset)
*/
if (fdd->write_q != NULL && fdd->write_q->next != NULL)
{
len = 0;
for (q = fdd->write_q; q != NULL; q = q->next)
len += q->len - q->buf_offset;
wq = memAllocate(MEM_DWRITE_Q);
wq->buf = xmalloc(len);
wq->len = 0;
wq->buf_offset = 0;
wq->next = NULL;
wq->free_func = xfree;
do
{
q = fdd->write_q;
len = q->len - q->buf_offset;
xmemcpy(wq->buf + wq->len, q->buf + q->buf_offset, len);
wq->len += len;
fdd->write_q = q->next;
if (q->free_func)
(q->free_func) (q->buf);
if (q)
{
memFree(q, MEM_DWRITE_Q);
q = NULL;
}
}
while (fdd->write_q != NULL);
fdd->write_q_tail = wq;
fdd->write_q = wq;
}
}