mirror of
https://gitea.invidious.io/iv-org/litespeed-quic.git
synced 2024-08-15 00:53:43 +00:00
Latest changes
- Do not send RST_STREAM when stream is closed for reading - Raise maximum header size from 4K to 64K - Check header name and value lengths against maximum imposed by HPACK - Fix NULL dereference in stream flow controller
This commit is contained in:
parent
83287402d5
commit
0ae3fccd17
13 changed files with 173 additions and 90 deletions
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@ -1,3 +1,10 @@
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2017-10-12
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- Do not send RST_STREAM when stream is closed for reading
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- Raise maximum header size from 4K to 64K
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- Check header name and value lengths against maximum imposed by HPACK
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- Fix NULL dereference in stream flow controller
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2017-10-09
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- Hide handshake implementation behind a set of function pointers
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@ -514,7 +514,7 @@ struct header_writer_ctx
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} hwc_flags;
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enum pseudo_header pseh_mask;
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char *pseh_bufs[N_PSEH];
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uint16_t name_len,
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hpack_strlen_t name_len,
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val_len;
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};
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@ -49,6 +49,8 @@ struct frame_buf
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#define frab_left_to_write(f) ((unsigned short) sizeof((f)->frab_buf) - (f)->frab_size)
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#define frab_write_to(f) ((f)->frab_buf + (f)->frab_size)
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#define MAX_HEADERS_SIZE (64 * 1024)
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/* Make sure that frab_buf is at least five bytes long, otherwise a frame
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* won't fit into two adjacent frabs.
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*/
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@ -392,6 +394,19 @@ calc_headers_size (const struct lsquic_http_headers *headers)
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}
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static int
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have_oversize_strings (const struct lsquic_http_headers *headers)
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{
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int i, have;
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for (i = 0, have = 0; i < headers->count; ++i)
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{
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have |= headers->headers[i].name.iov_len > HPACK_MAX_STRLEN;
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have |= headers->headers[i].value.iov_len > HPACK_MAX_STRLEN;
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}
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return have;
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}
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static int
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check_headers_size (const struct lsquic_frame_writer *fw,
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const struct lsquic_http_headers *headers,
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@ -435,25 +450,29 @@ check_headers_case (const struct lsquic_frame_writer *fw,
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static int
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write_headers (struct lsquic_frame_writer *fw,
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const struct lsquic_http_headers *headers,
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struct header_framer_ctx *hfc, unsigned char *buf4k)
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struct header_framer_ctx *hfc, unsigned char *buf,
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const unsigned buf_sz)
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{
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unsigned char *end;
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int i, s;
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for (i = 0; i < headers->count; ++i)
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{
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end = lsquic_henc_encode(fw->fw_henc, buf4k, buf4k + 0x1000,
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end = lsquic_henc_encode(fw->fw_henc, buf, buf + buf_sz,
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headers->headers[i].name.iov_base, headers->headers[i].name.iov_len,
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headers->headers[i].value.iov_base, headers->headers[i].value.iov_len, 0);
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if (!(end > buf4k))
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if (end > buf)
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{
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s = hfc_write(hfc, buf, end - buf);
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if (s < 0)
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return s;
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}
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else
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{
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LSQ_WARN("error encoding header");
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errno = EBADMSG;
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return -1;
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}
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s = hfc_write(hfc, buf4k, end - buf4k);
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if (s < 0)
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return s;
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}
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return 0;
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@ -481,6 +500,9 @@ lsquic_frame_writer_write_headers (struct lsquic_frame_writer *fw,
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if (0 != check_headers_case(fw, headers))
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return -1;
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if (have_oversize_strings(headers))
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return -1;
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if (eos)
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flags = HFHF_END_STREAM;
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else
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@ -501,11 +523,11 @@ lsquic_frame_writer_write_headers (struct lsquic_frame_writer *fw,
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return s;
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}
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buf = lsquic_mm_get_4k(fw->fw_mm);
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buf = malloc(MAX_HEADERS_SIZE);
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if (!buf)
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return -1;
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s = write_headers(fw, headers, &hfc, buf);
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lsquic_mm_put_4k(fw->fw_mm, buf);
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s = write_headers(fw, headers, &hfc, buf, MAX_HEADERS_SIZE);
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free(buf);
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if (0 == s)
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{
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EV_LOG_GENERATED_HTTP_HEADERS(LSQUIC_LOG_CONN_ID, stream_id,
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@ -556,6 +578,12 @@ lsquic_frame_writer_write_promise (struct lsquic_frame_writer *fw,
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if (extra_headers && 0 != check_headers_case(fw, extra_headers))
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return -1;
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if (have_oversize_strings(&mpas))
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return -1;
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if (extra_headers && have_oversize_strings(extra_headers))
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return -1;
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hfc_init(&hfc, fw, fw->fw_max_frame_sz, HTTP_FRAME_PUSH_PROMISE,
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stream_id, 0);
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@ -565,21 +593,21 @@ lsquic_frame_writer_write_promise (struct lsquic_frame_writer *fw,
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if (s < 0)
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return s;
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buf = lsquic_mm_get_4k(fw->fw_mm);
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buf = malloc(MAX_HEADERS_SIZE);
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if (!buf)
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return -1;
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s = write_headers(fw, &mpas, &hfc, buf);
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s = write_headers(fw, &mpas, &hfc, buf, MAX_HEADERS_SIZE);
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if (s != 0)
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{
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lsquic_mm_put_4k(fw->fw_mm, buf);
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free(buf);
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return -1;
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}
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if (extra_headers)
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s = write_headers(fw, extra_headers, &hfc, buf);
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s = write_headers(fw, extra_headers, &hfc, buf, MAX_HEADERS_SIZE);
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lsquic_mm_put_4k(fw->fw_mm, buf);
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free(buf);
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if (0 == s)
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{
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@ -641,6 +669,7 @@ write_settings (struct lsquic_frame_writer *fw,
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return 0;
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}
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int
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lsquic_frame_writer_write_settings (struct lsquic_frame_writer *fw,
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const struct lsquic_http2_setting *settings, unsigned n_settings)
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@ -711,3 +740,5 @@ lsquic_frame_writer_write_priority (struct lsquic_frame_writer *fw,
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return lsquic_frame_writer_flush(fw);
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}
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@ -2,6 +2,8 @@
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#ifndef LSQUIC_HPACK_COMMON_H
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#define LSQUIC_HPACK_COMMON_H
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#include "lsquic_hpack_types.h"
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#define HPACK_STATIC_TABLE_SIZE 61
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#define INITIAL_DYNAMIC_TABLE_SIZE 4096
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typedef struct hpack_hdr_tbl_s
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{
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const char *name;
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uint16_t name_len;
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hpack_strlen_t name_len;
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const char *val;
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uint16_t val_len;
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hpack_strlen_t val_len;
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} hpack_hdr_tbl_t;
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/**
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@ -6,6 +6,8 @@
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#ifndef LSQUIC_HPACK_DEC_H
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#define LSQUIC_HPACK_DEC_H
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#include "lsquic_hpack_types.h"
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struct lsquic_hdec
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{
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unsigned hpd_max_capacity; /* Maximum set by caller */
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@ -34,7 +36,8 @@ lsquic_hdec_cleanup (struct lsquic_hdec *);
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int
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lsquic_hdec_decode (struct lsquic_hdec *dec,
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const unsigned char **src, const unsigned char *src_end,
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char *dst, char *const dst_end, uint16_t *name_len, uint16_t *val_len);
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char *dst, char *const dst_end, hpack_strlen_t *name_len,
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hpack_strlen_t *val_len);
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void
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lsquic_hdec_set_max_capacity (struct lsquic_hdec *, unsigned);
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int
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lsquic_hdec_push_entry (struct lsquic_hdec *dec, const char *name,
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uint16_t name_len, const char *val, uint16_t val_len);
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hpack_strlen_t name_len, const char *val,
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hpack_strlen_t val_len);
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#endif
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#endif
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@ -29,8 +29,8 @@ struct enc_table_entry
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unsigned ete_id;
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unsigned ete_nameval_hash;
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unsigned ete_name_hash;
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uint16_t ete_name_len;
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uint16_t ete_val_len;
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hpack_strlen_t ete_name_len;
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hpack_strlen_t ete_val_len;
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char ete_buf[0];
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};
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@ -93,8 +93,8 @@ lsquic_henc_cleanup (struct lsquic_henc *enc)
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static
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#endif
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unsigned
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lsquic_henc_get_stx_tab_id (const char *name, uint16_t name_len,
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const char *val, uint16_t val_len, int *val_matched)
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lsquic_henc_get_stx_tab_id (const char *name, hpack_strlen_t name_len,
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const char *val, hpack_strlen_t val_len, int *val_matched)
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{
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if (name_len < 3)
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return 0;
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@ -428,7 +428,7 @@ henc_calc_table_id (const struct lsquic_henc *enc,
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static unsigned
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henc_find_table_id (struct lsquic_henc *enc, const char *name,
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uint16_t name_len, const char *value, uint16_t value_len,
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hpack_strlen_t name_len, const char *value, hpack_strlen_t value_len,
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int *val_matched)
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{
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struct enc_table_entry *entry;
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#endif
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int
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lsquic_henc_enc_str (unsigned char *const dst, size_t dst_len,
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const unsigned char *str, uint16_t str_len)
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const unsigned char *str, hpack_strlen_t str_len)
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{
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unsigned char size_buf[4];
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unsigned char *p;
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#endif
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int
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lsquic_henc_push_entry (struct lsquic_henc *enc, const char *name,
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uint16_t name_len, const char *value, uint16_t value_len)
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hpack_strlen_t name_len, const char *value,
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hpack_strlen_t value_len)
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{
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unsigned name_hash, nameval_hash, buckno;
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struct enc_table_entry *entry;
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unsigned char *
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lsquic_henc_encode (struct lsquic_henc *enc, unsigned char *dst,
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unsigned char *dst_end, const char *name, uint16_t name_len,
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const char *value, uint16_t value_len, int indexed_type)
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unsigned char *dst_end, const char *name, hpack_strlen_t name_len,
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const char *value, hpack_strlen_t value_len, int indexed_type)
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{
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//indexed_type: 0, Add, 1,: without, 2: never
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static const char indexed_prefix_number[] = {0x40, 0x00, 0x10};
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@ -6,6 +6,8 @@
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#ifndef LSQUIC_HPACK_ENC_H
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#define LSQUIC_HPACK_ENC_H 1
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#include "lsquic_hpack_types.h"
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struct enc_table_entry;
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#ifndef NDEBUG
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@ -72,24 +74,24 @@ lsquic_henc_cleanup (struct lsquic_henc *);
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*/
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unsigned char *
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lsquic_henc_encode (struct lsquic_henc *henc, unsigned char *dst,
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unsigned char *dst_end, const char *name, uint16_t name_len,
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const char *value, uint16_t value_len, int indexed_type);
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unsigned char *dst_end, const char *name, hpack_strlen_t name_len,
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const char *value, hpack_strlen_t value_len, int indexed_type);
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void
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lsquic_henc_set_max_capacity (struct lsquic_henc *, unsigned);
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#ifndef NDEBUG
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unsigned
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lsquic_henc_get_stx_tab_id (const char *name, uint16_t name_len,
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const char *val, uint16_t val_len, int *val_matched);
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lsquic_henc_get_stx_tab_id (const char *name, hpack_strlen_t name_len,
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const char *val, hpack_strlen_t val_len, int *val_matched);
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int
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lsquic_henc_push_entry (struct lsquic_henc *enc, const char *name,
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uint16_t name_len, const char *value, uint16_t value_len);
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hpack_strlen_t name_len, const char *value, hpack_strlen_t value_len);
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int
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lsquic_henc_enc_str (unsigned char *const dst, size_t dst_len,
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const unsigned char *str, uint16_t str_len);
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const unsigned char *str, hpack_strlen_t str_len);
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void
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lsquic_henc_iter_reset (struct lsquic_henc *enc);
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10
src/liblsquic/lsquic_hpack_types.h
Normal file
10
src/liblsquic/lsquic_hpack_types.h
Normal file
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@ -0,0 +1,10 @@
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/* Copyright (c) 2017 LiteSpeed Technologies Inc. See LICENSE. */
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#ifndef LSQUIC_HPACK_TYPES_H
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#define LSQUIC_HPACK_TYPES_H 1
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typedef uint16_t hpack_strlen_t;
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#define HPACK_MAX_STRLEN (((1 << (sizeof(hpack_strlen_t) * 8 - 1)) | \
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(((1 << (sizeof(hpack_strlen_t) * 8 - 1)) - 1))))
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#endif
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@ -49,18 +49,27 @@ sfcw_maybe_increase_max_window (struct lsquic_sfcw *fc)
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if (new_max_window > fc->sf_conn_pub->enpub->enp_settings.es_max_sfcw)
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new_max_window = fc->sf_conn_pub->enpub->enp_settings.es_max_sfcw;
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/* Do not increase past the connection's maximum window size. The
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* connection's window will be increased separately, if possible.
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*
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* The reference implementation has the logic backwards: Imagine
|
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* several concurrent streams that are not being read from fast
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* enough by the user code. Each of them uses only a fraction
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* of bandwidth. Does it mean that the connection window must
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* increase? No.
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*/
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max_conn_window = lsquic_cfcw_get_max_recv_window(fc->sf_cfcw);
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if (new_max_window > max_conn_window)
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new_max_window = max_conn_window;
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if (fc->sf_cfcw)
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{
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/* Do not increase past the connection's maximum window size. The
|
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* connection's window will be increased separately, if possible.
|
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*
|
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* The reference implementation has the logic backwards: Imagine
|
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* several concurrent streams that are not being read from fast
|
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* enough by the user code. Each of them uses only a fraction
|
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* of bandwidth. Does it mean that the connection window must
|
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* increase? No.
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*/
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max_conn_window = lsquic_cfcw_get_max_recv_window(fc->sf_cfcw);
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if (new_max_window > max_conn_window)
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new_max_window = max_conn_window;
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}
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else
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{
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/* This means that this stream is not affected by connection flow
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* controller. No need to adjust under connection window.
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*/
|
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}
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if (new_max_window > fc->sf_max_recv_win)
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{
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|
|
|
@ -197,7 +197,6 @@ sm_history_append (lsquic_stream_t *stream, enum stream_history_event sh_event)
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stream->sm_hist_buf);
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}
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# define SM_HISTORY_APPEND(stream, event) sm_history_append(stream, event)
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# define SM_HISTORY_DUMP_REMAINING(stream) do { \
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if (stream->sm_hist_idx & SM_HIST_IDX_MASK) \
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|
@ -577,8 +576,6 @@ lsquic_stream_frame_in (lsquic_stream_t *stream, stream_frame_t *frame)
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max_off = frame->data_frame.df_offset + frame->data_frame.df_size;
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if (0 != lsquic_stream_update_sfcw(stream, max_off))
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return -1;
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if ((stream->stream_flags & STREAM_U_READ_DONE))
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lsquic_stream_reset_ext(stream, 1, 0);
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if (frame->data_frame.df_fin)
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{
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SM_HISTORY_APPEND(stream, SHE_FIN_IN);
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|
@ -902,24 +899,12 @@ lsquic_stream_tosend_fin (const lsquic_stream_t *stream)
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}
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|
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|
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static int
|
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readable_data_frame_remains (lsquic_stream_t *stream)
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{
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return !stream->data_in->di_if->di_empty(stream->data_in);
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}
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|
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static void
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stream_shutdown_read (lsquic_stream_t *stream)
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{
|
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if (!(stream->stream_flags & STREAM_U_READ_DONE))
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{
|
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SM_HISTORY_APPEND(stream, SHE_SHUTDOWN_READ);
|
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if (stream->uh || readable_data_frame_remains(stream))
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{
|
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LSQ_INFO("read shut down, but there is still data to be read");
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lsquic_stream_reset_ext(stream, 1, 1);
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}
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stream->stream_flags |= STREAM_U_READ_DONE;
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stream_wantread(stream, 0);
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maybe_finish_stream(stream);
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|
@ -1314,7 +1299,6 @@ maybe_mark_as_blocked (lsquic_stream_t *stream)
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}
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
lsquic_stream_dispatch_rw_events (lsquic_stream_t *stream)
|
||||
{
|
||||
|
@ -1384,7 +1368,6 @@ sbt_write (struct stream_buf_tosend *sbt, const void *buf, size_t len)
|
|||
return ntowrite;
|
||||
}
|
||||
|
||||
|
||||
static size_t
|
||||
sbt_read_buf (struct stream_buf_tosend *sbt, void *buf, size_t len)
|
||||
{
|
||||
|
@ -2403,5 +2386,3 @@ lsquic_stream_refuse_push (lsquic_stream_t *stream)
|
|||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
@ -9,6 +9,7 @@
|
|||
|
||||
#define LSQUIC_STREAM_DEFAULT_PRIO 16 /* RFC 7540, Section 5.3.5 */
|
||||
|
||||
|
||||
struct lsquic_stream_if;
|
||||
struct lsquic_stream_ctx;
|
||||
struct lsquic_conn_public;
|
||||
|
@ -18,6 +19,7 @@ struct uncompressed_headers;
|
|||
TAILQ_HEAD(lsquic_streams_tailq, lsquic_stream);
|
||||
TAILQ_HEAD(sbts_tailq, stream_buf_tosend);
|
||||
|
||||
|
||||
#ifndef LSQUIC_KEEP_STREAM_HISTORY
|
||||
# ifdef NDEBUG
|
||||
# define LSQUIC_KEEP_STREAM_HISTORY 0
|
||||
|
@ -26,12 +28,14 @@ TAILQ_HEAD(sbts_tailq, stream_buf_tosend);
|
|||
# endif
|
||||
#endif
|
||||
|
||||
|
||||
#if LSQUIC_KEEP_STREAM_HISTORY
|
||||
#define SM_HIST_BITS 6
|
||||
#define SM_HIST_IDX_MASK ((1 << SM_HIST_BITS) - 1)
|
||||
typedef unsigned char sm_hist_idx_t;
|
||||
#endif
|
||||
|
||||
|
||||
struct lsquic_stream
|
||||
{
|
||||
uint32_t id;
|
||||
|
@ -143,6 +147,7 @@ struct lsquic_stream
|
|||
#endif
|
||||
};
|
||||
|
||||
|
||||
enum stream_ctor_flags
|
||||
{
|
||||
SCF_CALL_ON_NEW = (1 << 0), /* Call on_new_stream() immediately */
|
||||
|
@ -156,6 +161,7 @@ enum stream_ctor_flags
|
|||
SCF_DISP_RW_ONCE = (1 << 3),
|
||||
};
|
||||
|
||||
|
||||
lsquic_stream_t *
|
||||
lsquic_stream_new_ext (uint32_t id, struct lsquic_conn_public *conn_pub,
|
||||
const struct lsquic_stream_if *, void *stream_if_ctx,
|
||||
|
|
|
@ -150,6 +150,47 @@ test_one_header (void)
|
|||
}
|
||||
|
||||
|
||||
static void
|
||||
test_oversize_header (void)
|
||||
{
|
||||
struct lsquic_henc henc;
|
||||
struct lsquic_frame_writer *fw;
|
||||
int s;
|
||||
struct lsquic_mm mm;
|
||||
const size_t big_len = 100 * 1000;
|
||||
char *value;
|
||||
|
||||
lsquic_henc_init(&henc);
|
||||
lsquic_mm_init(&mm);
|
||||
fw = lsquic_frame_writer_new(&mm, NULL, 0x200, &henc, output_write,
|
||||
output_navail, output_flush, 0);
|
||||
reset_output(0);
|
||||
|
||||
value = malloc(big_len);
|
||||
memset(value, 'A', big_len);
|
||||
|
||||
struct lsquic_http_header header_arr[] =
|
||||
{
|
||||
{ .name = IOV(":status"), .value = IOV("302") },
|
||||
{ .name = IOV("some-header"),
|
||||
.value = { .iov_base = value, .iov_len = big_len, } },
|
||||
};
|
||||
|
||||
struct lsquic_http_headers headers = {
|
||||
.count = sizeof(header_arr) / sizeof(header_arr[0]),
|
||||
.headers = header_arr,
|
||||
};
|
||||
|
||||
s = lsquic_frame_writer_write_headers(fw, 12345, &headers, 0, 100);
|
||||
assert(-1 == s);
|
||||
|
||||
lsquic_frame_writer_destroy(fw);
|
||||
lsquic_henc_cleanup(&henc);
|
||||
lsquic_mm_cleanup(&mm);
|
||||
free(value);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_continuations (void)
|
||||
{
|
||||
|
@ -533,6 +574,7 @@ int
|
|||
main (void)
|
||||
{
|
||||
test_one_header();
|
||||
test_oversize_header();
|
||||
test_continuations();
|
||||
test_settings_normal();
|
||||
test_settings_short();
|
||||
|
|
|
@ -204,7 +204,6 @@ permute_and_run (uint64_t run_id,
|
|||
}
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_write_file (const char *filename)
|
||||
{
|
||||
|
@ -592,7 +591,7 @@ test_rem_FIN_loc_FIN (struct test_objs *tobjs)
|
|||
|
||||
|
||||
/* Server: we read data and close the read side before reading FIN, which
|
||||
* results in stream being reset.
|
||||
* DOES NOT result in stream being reset.
|
||||
*/
|
||||
static void
|
||||
test_rem_data_loc_close (struct test_objs *tobjs)
|
||||
|
@ -610,40 +609,30 @@ test_rem_data_loc_close (struct test_objs *tobjs)
|
|||
n = lsquic_stream_read(stream, buf, 60);
|
||||
assert(60 == n);
|
||||
|
||||
s = lsquic_stream_shutdown(stream, 0); /* This causes a reset */
|
||||
s = lsquic_stream_shutdown(stream, 0);
|
||||
assert(0 == s);
|
||||
assert(!TAILQ_EMPTY(&tobjs->conn_pub.service_streams));
|
||||
assert((stream->stream_flags & (STREAM_SERVICE_FLAGS))
|
||||
== STREAM_CALL_ONCLOSE);
|
||||
|
||||
n = lsquic_stream_write(stream, buf, 100);
|
||||
assert(n == -1); /* Cannot write to reset stream */
|
||||
assert(TAILQ_EMPTY(&tobjs->conn_pub.service_streams));
|
||||
assert(!((stream->stream_flags & (STREAM_SERVICE_FLAGS))
|
||||
== STREAM_CALL_ONCLOSE));
|
||||
|
||||
n = lsquic_stream_read(stream, buf, 60);
|
||||
assert(n == -1); /* Cannot read from reset stream */
|
||||
assert(n == -1); /* Cannot read from closed stream */
|
||||
|
||||
/* Close write side */
|
||||
s = lsquic_stream_shutdown(stream, 1);
|
||||
assert(-1 == s);
|
||||
assert(0 == s);
|
||||
|
||||
/* Reset is scheduled to be sent out: */
|
||||
/* STREAM frame is scheduled to be sent out: */
|
||||
assert(!TAILQ_EMPTY(&tobjs->conn_pub.sending_streams));
|
||||
assert((stream->stream_flags & (STREAM_SENDING_FLAGS))
|
||||
== STREAM_SEND_RST);
|
||||
|
||||
lsquic_stream_call_on_close(stream);
|
||||
assert(!(stream->stream_flags & (STREAM_SERVICE_FLAGS)));
|
||||
|
||||
/* reset frame has been sent */
|
||||
lsquic_stream_rst_frame_sent(stream);
|
||||
assert(TAILQ_EMPTY(&tobjs->conn_pub.sending_streams));
|
||||
assert(!(stream->stream_flags & (STREAM_SENDING_FLAGS)));
|
||||
== STREAM_SEND_DATA);
|
||||
|
||||
s = lsquic_stream_rst_in(stream, 100, 1);
|
||||
assert(0 == s);
|
||||
|
||||
assert(!TAILQ_EMPTY(&tobjs->conn_pub.service_streams));
|
||||
assert((stream->stream_flags & (STREAM_SERVICE_FLAGS))
|
||||
== STREAM_FREE_STREAM);
|
||||
== STREAM_CALL_ONCLOSE);
|
||||
|
||||
lsquic_stream_destroy(stream);
|
||||
assert(TAILQ_EMPTY(&tobjs->conn_pub.service_streams));
|
||||
|
@ -653,6 +642,7 @@ test_rem_data_loc_close (struct test_objs *tobjs)
|
|||
}
|
||||
|
||||
|
||||
|
||||
/* Client: we send some data and FIN, but remote end sends some data and
|
||||
* then resets the stream. The client gets an error when it reads from
|
||||
* stream, after which it closes and destroys the stream.
|
||||
|
@ -948,6 +938,7 @@ test_unlimited_stream_flush_data (struct test_objs *tobjs)
|
|||
}
|
||||
|
||||
|
||||
|
||||
/* Write a little data to the stream, packetize the data, then reset the
|
||||
* stream: connection cap should NOT go back up.
|
||||
*
|
||||
|
@ -1947,8 +1938,5 @@ main (int argc, char **argv)
|
|||
|
||||
test_flushing();
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
|
Loading…
Reference in a new issue