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src/event/quic/ngx_event_quic_frames.c - nginx source code
Functions defined
Macros defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_event.h>
- #include <ngx_event_quic_connection.h>
- #define NGX_QUIC_BUFFER_SIZE 4096
- #define ngx_quic_buf_refs(b) (b)->shadow->num
- #define ngx_quic_buf_inc_refs(b) ngx_quic_buf_refs(b)++
- #define ngx_quic_buf_dec_refs(b) ngx_quic_buf_refs(b)--
- #define ngx_quic_buf_set_refs(b, v) ngx_quic_buf_refs(b) = v
- static ngx_buf_t *ngx_quic_alloc_buf(ngx_connection_t *c);
- static void ngx_quic_free_buf(ngx_connection_t *c, ngx_buf_t *b);
- static ngx_buf_t *ngx_quic_clone_buf(ngx_connection_t *c, ngx_buf_t *b);
- static ngx_int_t ngx_quic_split_chain(ngx_connection_t *c, ngx_chain_t *cl,
- off_t offset);
- static ngx_buf_t *
- ngx_quic_alloc_buf(ngx_connection_t *c)
- {
- u_char *p;
- ngx_buf_t *b;
- ngx_quic_connection_t *qc;
- qc = ngx_quic_get_connection(c);
- b = qc->free_bufs;
- if (b) {
- qc->free_bufs = b->shadow;
- p = b->start;
- } else {
- b = qc->free_shadow_bufs;
- if (b) {
- qc->free_shadow_bufs = b->shadow;
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic use shadow buffer n:%ui %ui",
- ++qc->nbufs, --qc->nshadowbufs);
- #endif
- } else {
- b = ngx_palloc(c->pool, sizeof(ngx_buf_t));
- if (b == NULL) {
- return NULL;
- }
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic new buffer n:%ui", ++qc->nbufs);
- #endif
- }
- p = ngx_pnalloc(c->pool, NGX_QUIC_BUFFER_SIZE);
- if (p == NULL) {
- return NULL;
- }
- }
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "quic alloc buffer %p", b);
- #endif
- ngx_memzero(b, sizeof(ngx_buf_t));
- b->tag = (ngx_buf_tag_t) &ngx_quic_alloc_buf;
- b->temporary = 1;
- b->shadow = b;
- b->start = p;
- b->pos = p;
- b->last = p;
- b->end = p + NGX_QUIC_BUFFER_SIZE;
- ngx_quic_buf_set_refs(b, 1);
- return b;
- }
- static void
- ngx_quic_free_buf(ngx_connection_t *c, ngx_buf_t *b)
- {
- ngx_buf_t *shadow;
- ngx_quic_connection_t *qc;
- qc = ngx_quic_get_connection(c);
- ngx_quic_buf_dec_refs(b);
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic free buffer %p r:%ui",
- b, (ngx_uint_t) ngx_quic_buf_refs(b));
- #endif
- shadow = b->shadow;
- if (ngx_quic_buf_refs(b) == 0) {
- shadow->shadow = qc->free_bufs;
- qc->free_bufs = shadow;
- }
- if (b != shadow) {
- b->shadow = qc->free_shadow_bufs;
- qc->free_shadow_bufs = b;
- }
- }
- static ngx_buf_t *
- ngx_quic_clone_buf(ngx_connection_t *c, ngx_buf_t *b)
- {
- ngx_buf_t *nb;
- ngx_quic_connection_t *qc;
- qc = ngx_quic_get_connection(c);
- nb = qc->free_shadow_bufs;
- if (nb) {
- qc->free_shadow_bufs = nb->shadow;
- } else {
- nb = ngx_palloc(c->pool, sizeof(ngx_buf_t));
- if (nb == NULL) {
- return NULL;
- }
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic new shadow buffer n:%ui", ++qc->nshadowbufs);
- #endif
- }
- *nb = *b;
- ngx_quic_buf_inc_refs(b);
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic clone buffer %p %p r:%ui",
- b, nb, (ngx_uint_t) ngx_quic_buf_refs(b));
- #endif
- return nb;
- }
- static ngx_int_t
- ngx_quic_split_chain(ngx_connection_t *c, ngx_chain_t *cl, off_t offset)
- {
- ngx_buf_t *b, *tb;
- ngx_chain_t *tail;
- b = cl->buf;
- tail = ngx_alloc_chain_link(c->pool);
- if (tail == NULL) {
- return NGX_ERROR;
- }
- tb = ngx_quic_clone_buf(c, b);
- if (tb == NULL) {
- return NGX_ERROR;
- }
- tail->buf = tb;
- tb->pos += offset;
- b->last = tb->pos;
- b->last_buf = 0;
- tail->next = cl->next;
- cl->next = tail;
- return NGX_OK;
- }
- ngx_quic_frame_t *
- ngx_quic_alloc_frame(ngx_connection_t *c)
- {
- ngx_queue_t *q;
- ngx_quic_frame_t *frame;
- ngx_quic_connection_t *qc;
- qc = ngx_quic_get_connection(c);
- if (!ngx_queue_empty(&qc->free_frames)) {
- q = ngx_queue_head(&qc->free_frames);
- frame = ngx_queue_data(q, ngx_quic_frame_t, queue);
- ngx_queue_remove(&frame->queue);
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic reuse frame n:%ui", qc->nframes);
- #endif
- } else if (qc->nframes < 10000) {
- frame = ngx_palloc(c->pool, sizeof(ngx_quic_frame_t));
- if (frame == NULL) {
- return NULL;
- }
- ++qc->nframes;
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic alloc frame n:%ui", qc->nframes);
- #endif
- } else {
- ngx_log_error(NGX_LOG_INFO, c->log, 0, "quic flood detected");
- return NULL;
- }
- ngx_memzero(frame, sizeof(ngx_quic_frame_t));
- return frame;
- }
- void
- ngx_quic_free_frame(ngx_connection_t *c, ngx_quic_frame_t *frame)
- {
- ngx_quic_connection_t *qc;
- qc = ngx_quic_get_connection(c);
- if (frame->data) {
- ngx_quic_free_chain(c, frame->data);
- }
- ngx_queue_insert_head(&qc->free_frames, &frame->queue);
- #ifdef NGX_QUIC_DEBUG_ALLOC
- ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic free frame n:%ui", qc->nframes);
- #endif
- }
- void
- ngx_quic_free_chain(ngx_connection_t *c, ngx_chain_t *in)
- {
- ngx_chain_t *cl;
- while (in) {
- cl = in;
- in = in->next;
- ngx_quic_free_buf(c, cl->buf);
- ngx_free_chain(c->pool, cl);
- }
- }
- void
- ngx_quic_free_frames(ngx_connection_t *c, ngx_queue_t *frames)
- {
- ngx_queue_t *q;
- ngx_quic_frame_t *f;
- do {
- q = ngx_queue_head(frames);
- if (q == ngx_queue_sentinel(frames)) {
- break;
- }
- ngx_queue_remove(q);
- f = ngx_queue_data(q, ngx_quic_frame_t, queue);
- ngx_quic_free_frame(c, f);
- } while (1);
- }
- void
- ngx_quic_queue_frame(ngx_quic_connection_t *qc, ngx_quic_frame_t *frame)
- {
- ngx_quic_send_ctx_t *ctx;
- ctx = ngx_quic_get_send_ctx(qc, frame->level);
- ngx_queue_insert_tail(&ctx->frames, &frame->queue);
- frame->len = ngx_quic_create_frame(NULL, frame);
-
- if (qc->closing) {
- return;
- }
- ngx_post_event(&qc->push, &ngx_posted_events);
- }
- ngx_int_t
- ngx_quic_split_frame(ngx_connection_t *c, ngx_quic_frame_t *f, size_t len)
- {
- size_t shrink;
- ngx_chain_t *out;
- ngx_quic_frame_t *nf;
- ngx_quic_buffer_t qb;
- ngx_quic_ordered_frame_t *of, *onf;
- switch (f->type) {
- case NGX_QUIC_FT_CRYPTO:
- case NGX_QUIC_FT_STREAM:
- break;
- default:
- return NGX_DECLINED;
- }
- if ((size_t) f->len <= len) {
- return NGX_OK;
- }
- shrink = f->len - len;
- ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
- "quic split frame now:%uz need:%uz shrink:%uz",
- f->len, len, shrink);
- of = &f->u.ord;
- if (of->length <= shrink) {
- return NGX_DECLINED;
- }
- of->length -= shrink;
- f->len = ngx_quic_create_frame(NULL, f);
- if ((size_t) f->len > len) {
- ngx_log_error(NGX_LOG_ERR, c->log, 0, "could not split QUIC frame");
- return NGX_ERROR;
- }
- ngx_memzero(&qb, sizeof(ngx_quic_buffer_t));
- qb.chain = f->data;
- out = ngx_quic_read_buffer(c, &qb, of->length);
- if (out == NGX_CHAIN_ERROR) {
- return NGX_ERROR;
- }
- f->data = out;
- nf = ngx_quic_alloc_frame(c);
- if (nf == NULL) {
- return NGX_ERROR;
- }
- *nf = *f;
- onf = &nf->u.ord;
- onf->offset += of->length;
- onf->length = shrink;
- nf->len = ngx_quic_create_frame(NULL, nf);
- nf->data = qb.chain;
- if (f->type == NGX_QUIC_FT_STREAM) {
- f->u.stream.fin = 0;
- }
- ngx_queue_insert_after(&f->queue, &nf->queue);
- return NGX_OK;
- }
- ngx_chain_t *
- ngx_quic_copy_buffer(ngx_connection_t *c, u_char *data, size_t len)
- {
- ngx_buf_t buf;
- ngx_chain_t cl, *out;
- ngx_quic_buffer_t qb;
- ngx_memzero(&buf, sizeof(ngx_buf_t));
- buf.pos = data;
- buf.last = buf.pos + len;
- buf.temporary = 1;
- cl.buf = &buf;
- cl.next = NULL;
- ngx_memzero(&qb, sizeof(ngx_quic_buffer_t));
- if (ngx_quic_write_buffer(c, &qb, &cl, len, 0) == NGX_CHAIN_ERROR) {
- return NGX_CHAIN_ERROR;
- }
- out = ngx_quic_read_buffer(c, &qb, len);
- if (out == NGX_CHAIN_ERROR) {
- return NGX_CHAIN_ERROR;
- }
- ngx_quic_free_buffer(c, &qb);
- return out;
- }
- ngx_chain_t *
- ngx_quic_read_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb, uint64_t limit)
- {
- uint64_t n;
- ngx_buf_t *b;
- ngx_chain_t *out, **ll;
- out = qb->chain;
- for (ll = &out; *ll; ll = &(*ll)->next) {
- b = (*ll)->buf;
- if (b->sync) {
-
- break;
- }
- if (limit == 0) {
- break;
- }
- n = b->last - b->pos;
- if (n > limit) {
- if (ngx_quic_split_chain(c, *ll, limit) != NGX_OK) {
- return NGX_CHAIN_ERROR;
- }
- n = limit;
- }
- limit -= n;
- qb->offset += n;
- }
- if (qb->offset >= qb->last_offset) {
- qb->last_chain = NULL;
- }
- qb->chain = *ll;
- *ll = NULL;
- return out;
- }
- void
- ngx_quic_skip_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb,
- uint64_t offset)
- {
- size_t n;
- ngx_buf_t *b;
- ngx_chain_t *cl;
- while (qb->chain) {
- if (qb->offset >= offset) {
- break;
- }
- cl = qb->chain;
- b = cl->buf;
- n = b->last - b->pos;
- if (qb->offset + n > offset) {
- n = offset - qb->offset;
- b->pos += n;
- qb->offset += n;
- break;
- }
- qb->offset += n;
- qb->chain = cl->next;
- cl->next = NULL;
- ngx_quic_free_chain(c, cl);
- }
- if (qb->chain == NULL) {
- qb->offset = offset;
- }
- if (qb->offset >= qb->last_offset) {
- qb->last_chain = NULL;
- }
- }
- ngx_chain_t *
- ngx_quic_alloc_chain(ngx_connection_t *c)
- {
- ngx_chain_t *cl;
- cl = ngx_alloc_chain_link(c->pool);
- if (cl == NULL) {
- return NULL;
- }
- cl->buf = ngx_quic_alloc_buf(c);
- if (cl->buf == NULL) {
- return NULL;
- }
- return cl;
- }
- ngx_chain_t *
- ngx_quic_write_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb,
- ngx_chain_t *in, uint64_t limit, uint64_t offset)
- {
- u_char *p;
- uint64_t n, base;
- ngx_buf_t *b;
- ngx_chain_t *cl, **chain;
- if (qb->last_chain && offset >= qb->last_offset) {
- base = qb->last_offset;
- chain = &qb->last_chain;
- } else {
- base = qb->offset;
- chain = &qb->chain;
- }
- while (in && limit) {
- if (offset < base) {
- n = ngx_min((uint64_t) (in->buf->last - in->buf->pos),
- ngx_min(base - offset, limit));
- in->buf->pos += n;
- offset += n;
- limit -= n;
- if (in->buf->pos == in->buf->last) {
- in = in->next;
- }
- continue;
- }
- cl = *chain;
- if (cl == NULL) {
- cl = ngx_quic_alloc_chain(c);
- if (cl == NULL) {
- return NGX_CHAIN_ERROR;
- }
- cl->buf->last = cl->buf->end;
- cl->buf->sync = 1;
- cl->next = NULL;
- *chain = cl;
- }
- b = cl->buf;
- n = b->last - b->pos;
- if (base + n <= offset) {
- base += n;
- chain = &cl->next;
- continue;
- }
- if (b->sync && offset > base) {
- if (ngx_quic_split_chain(c, cl, offset - base) != NGX_OK) {
- return NGX_CHAIN_ERROR;
- }
- continue;
- }
- p = b->pos + (offset - base);
- while (in) {
- if (!ngx_buf_in_memory(in->buf) || in->buf->pos == in->buf->last) {
- in = in->next;
- continue;
- }
- if (p == b->last || limit == 0) {
- break;
- }
- n = ngx_min(b->last - p, in->buf->last - in->buf->pos);
- n = ngx_min(n, limit);
- if (b->sync) {
- ngx_memcpy(p, in->buf->pos, n);
- qb->size += n;
- }
- p += n;
- in->buf->pos += n;
- offset += n;
- limit -= n;
- }
- if (b->sync && p == b->last) {
- b->sync = 0;
- continue;
- }
- if (b->sync && p != b->pos) {
- if (ngx_quic_split_chain(c, cl, p - b->pos) != NGX_OK) {
- return NGX_CHAIN_ERROR;
- }
- b->sync = 0;
- }
- }
- qb->last_offset = base;
- qb->last_chain = *chain;
- return in;
- }
- void
- ngx_quic_free_buffer(ngx_connection_t *c, ngx_quic_buffer_t *qb)
- {
- ngx_quic_free_chain(c, qb->chain);
- qb->chain = NULL;
- qb->last_chain = NULL;
- }
- #if (NGX_DEBUG)
- void
- ngx_quic_log_frame(ngx_log_t *log, ngx_quic_frame_t *f, ngx_uint_t tx)
- {
- u_char *p, *last, *pos, *end;
- ssize_t n;
- uint64_t gap, range, largest, smallest;
- ngx_uint_t i;
- u_char buf[NGX_MAX_ERROR_STR];
- p = buf;
- last = buf + sizeof(buf);
- switch (f->type) {
- case NGX_QUIC_FT_CRYPTO:
- p = ngx_slprintf(p, last, "CRYPTO len:%uL off:%uL",
- f->u.crypto.length, f->u.crypto.offset);
- #ifdef NGX_QUIC_DEBUG_FRAMES
- {
- ngx_chain_t *cl;
- p = ngx_slprintf(p, last, " data:");
- for (cl = f->data; cl; cl = cl->next) {
- p = ngx_slprintf(p, last, "%*xs",
- cl->buf->last - cl->buf->pos, cl->buf->pos);
- }
- }
- #endif
- break;
- case NGX_QUIC_FT_PADDING:
- p = ngx_slprintf(p, last, "PADDING");
- break;
- case NGX_QUIC_FT_ACK:
- case NGX_QUIC_FT_ACK_ECN:
- p = ngx_slprintf(p, last, "ACK n:%ui delay:%uL ",
- f->u.ack.range_count, f->u.ack.delay);
- if (f->data) {
- pos = f->data->buf->pos;
- end = f->data->buf->last;
- } else {
- pos = NULL;
- end = NULL;
- }
- largest = f->u.ack.largest;
- smallest = f->u.ack.largest - f->u.ack.first_range;
- if (largest == smallest) {
- p = ngx_slprintf(p, last, "%uL", largest);
- } else {
- p = ngx_slprintf(p, last, "%uL-%uL", largest, smallest);
- }
- for (i = 0; i < f->u.ack.range_count; i++) {
- n = ngx_quic_parse_ack_range(log, pos, end, &gap, &range);
- if (n == NGX_ERROR) {
- break;
- }
- pos += n;
- largest = smallest - gap - 2;
- smallest = largest - range;
- if (largest == smallest) {
- p = ngx_slprintf(p, last, " %uL", largest);
- } else {
- p = ngx_slprintf(p, last, " %uL-%uL", largest, smallest);
- }
- }
- if (f->type == NGX_QUIC_FT_ACK_ECN) {
- p = ngx_slprintf(p, last, " ECN counters ect0:%uL ect1:%uL ce:%uL",
- f->u.ack.ect0, f->u.ack.ect1, f->u.ack.ce);
- }
- break;
- case NGX_QUIC_FT_PING:
- p = ngx_slprintf(p, last, "PING");
- break;
- case NGX_QUIC_FT_NEW_CONNECTION_ID:
- p = ngx_slprintf(p, last,
- "NEW_CONNECTION_ID seq:%uL retire:%uL len:%ud",
- f->u.ncid.seqnum, f->u.ncid.retire, f->u.ncid.len);
- break;
- case NGX_QUIC_FT_RETIRE_CONNECTION_ID:
- p = ngx_slprintf(p, last, "RETIRE_CONNECTION_ID seqnum:%uL",
- f->u.retire_cid.sequence_number);
- break;
- case NGX_QUIC_FT_CONNECTION_CLOSE:
- case NGX_QUIC_FT_CONNECTION_CLOSE_APP:
- p = ngx_slprintf(p, last, "CONNECTION_CLOSE%s err:%ui",
- f->type == NGX_QUIC_FT_CONNECTION_CLOSE ? "" : "_APP",
- f->u.close.error_code);
- if (f->u.close.reason.len) {
- p = ngx_slprintf(p, last, " %V", &f->u.close.reason);
- }
- if (f->type == NGX_QUIC_FT_CONNECTION_CLOSE) {
- p = ngx_slprintf(p, last, " ft:%ui", f->u.close.frame_type);
- }
- break;
- case NGX_QUIC_FT_STREAM:
- p = ngx_slprintf(p, last, "STREAM id:0x%xL", f->u.stream.stream_id);
- if (f->u.stream.off) {
- p = ngx_slprintf(p, last, " off:%uL", f->u.stream.offset);
- }
- if (f->u.stream.len) {
- p = ngx_slprintf(p, last, " len:%uL", f->u.stream.length);
- }
- if (f->u.stream.fin) {
- p = ngx_slprintf(p, last, " fin:1");
- }
- #ifdef NGX_QUIC_DEBUG_FRAMES
- {
- ngx_chain_t *cl;
- p = ngx_slprintf(p, last, " data:");
- for (cl = f->data; cl; cl = cl->next) {
- p = ngx_slprintf(p, last, "%*xs",
- cl->buf->last - cl->buf->pos, cl->buf->pos);
- }
- }
- #endif
- break;
- case NGX_QUIC_FT_MAX_DATA:
- p = ngx_slprintf(p, last, "MAX_DATA max_data:%uL on recv",
- f->u.max_data.max_data);
- break;
- case NGX_QUIC_FT_RESET_STREAM:
- p = ngx_slprintf(p, last, "RESET_STREAM"
- " id:0x%xL error_code:0x%xL final_size:0x%xL",
- f->u.reset_stream.id, f->u.reset_stream.error_code,
- f->u.reset_stream.final_size);
- break;
- case NGX_QUIC_FT_STOP_SENDING:
- p = ngx_slprintf(p, last, "STOP_SENDING id:0x%xL err:0x%xL",
- f->u.stop_sending.id, f->u.stop_sending.error_code);
- break;
- case NGX_QUIC_FT_STREAMS_BLOCKED:
- case NGX_QUIC_FT_STREAMS_BLOCKED2:
- p = ngx_slprintf(p, last, "STREAMS_BLOCKED limit:%uL bidi:%ui",
- f->u.streams_blocked.limit, f->u.streams_blocked.bidi);
- break;
- case NGX_QUIC_FT_MAX_STREAMS:
- case NGX_QUIC_FT_MAX_STREAMS2:
- p = ngx_slprintf(p, last, "MAX_STREAMS limit:%uL bidi:%ui",
- f->u.max_streams.limit, f->u.max_streams.bidi);
- break;
- case NGX_QUIC_FT_MAX_STREAM_DATA:
- p = ngx_slprintf(p, last, "MAX_STREAM_DATA id:0x%xL limit:%uL",
- f->u.max_stream_data.id, f->u.max_stream_data.limit);
- break;
- case NGX_QUIC_FT_DATA_BLOCKED:
- p = ngx_slprintf(p, last, "DATA_BLOCKED limit:%uL",
- f->u.data_blocked.limit);
- break;
- case NGX_QUIC_FT_STREAM_DATA_BLOCKED:
- p = ngx_slprintf(p, last, "STREAM_DATA_BLOCKED id:0x%xL limit:%uL",
- f->u.stream_data_blocked.id,
- f->u.stream_data_blocked.limit);
- break;
- case NGX_QUIC_FT_PATH_CHALLENGE:
- p = ngx_slprintf(p, last, "PATH_CHALLENGE data:0x%*xs",
- sizeof(f->u.path_challenge.data),
- f->u.path_challenge.data);
- break;
- case NGX_QUIC_FT_PATH_RESPONSE:
- p = ngx_slprintf(p, last, "PATH_RESPONSE data:0x%*xs",
- sizeof(f->u.path_challenge.data),
- f->u.path_challenge.data);
- break;
- case NGX_QUIC_FT_NEW_TOKEN:
- p = ngx_slprintf(p, last, "NEW_TOKEN");
- #ifdef NGX_QUIC_DEBUG_FRAMES
- {
- ngx_chain_t *cl;
- p = ngx_slprintf(p, last, " token:");
- for (cl = f->data; cl; cl = cl->next) {
- p = ngx_slprintf(p, last, "%*xs",
- cl->buf->last - cl->buf->pos, cl->buf->pos);
- }
- }
- #endif
- break;
- case NGX_QUIC_FT_HANDSHAKE_DONE:
- p = ngx_slprintf(p, last, "HANDSHAKE DONE");
- break;
- default:
- p = ngx_slprintf(p, last, "unknown type 0x%xi", f->type);
- break;
- }
- ngx_log_debug5(NGX_LOG_DEBUG_EVENT, log, 0, "quic frame %s %s:%uL %*s",
- tx ? "tx" : "rx", ngx_quic_level_name(f->level), f->pnum,
- p - buf, buf);
- }
- #endif
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