| #!/usr/bin/env python2.7 |
| |
| # Copyright 2015 gRPC authors. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import hashlib |
| import itertools |
| import collections |
| import os |
| import sys |
| import subprocess |
| import re |
| import perfection |
| |
| # configuration: a list of either strings or 2-tuples of strings |
| # a single string represents a static grpc_mdstr |
| # a 2-tuple represents a static grpc_mdelem (and appropriate grpc_mdstrs will |
| # also be created) |
| |
| CONFIG = [ |
| # metadata strings |
| 'host', |
| 'grpc-timeout', |
| 'grpc-internal-encoding-request', |
| 'grpc-internal-stream-encoding-request', |
| 'grpc-payload-bin', |
| ':path', |
| 'grpc-encoding', |
| 'grpc-accept-encoding', |
| 'user-agent', |
| ':authority', |
| 'grpc-message', |
| 'grpc-status', |
| 'grpc-server-stats-bin', |
| 'grpc-tags-bin', |
| 'grpc-trace-bin', |
| '', |
| # channel arg keys |
| 'grpc.wait_for_ready', |
| 'grpc.timeout', |
| 'grpc.max_request_message_bytes', |
| 'grpc.max_response_message_bytes', |
| # well known method names |
| '/grpc.lb.v1.LoadBalancer/BalanceLoad', |
| # metadata elements |
| ('grpc-status', '0'), |
| ('grpc-status', '1'), |
| ('grpc-status', '2'), |
| ('grpc-encoding', 'identity'), |
| ('grpc-encoding', 'gzip'), |
| ('grpc-encoding', 'deflate'), |
| ('te', 'trailers'), |
| ('content-type', 'application/grpc'), |
| (':method', 'POST'), |
| (':status', '200'), |
| (':status', '404'), |
| (':scheme', 'http'), |
| (':scheme', 'https'), |
| (':scheme', 'grpc'), |
| (':authority', ''), |
| (':method', 'GET'), |
| (':method', 'PUT'), |
| (':path', '/'), |
| (':path', '/index.html'), |
| (':status', '204'), |
| (':status', '206'), |
| (':status', '304'), |
| (':status', '400'), |
| (':status', '500'), |
| ('accept-charset', ''), |
| ('accept-encoding', ''), |
| ('accept-encoding', 'gzip, deflate'), |
| ('accept-language', ''), |
| ('accept-ranges', ''), |
| ('accept', ''), |
| ('access-control-allow-origin', ''), |
| ('age', ''), |
| ('allow', ''), |
| ('authorization', ''), |
| ('cache-control', ''), |
| ('content-disposition', ''), |
| ('content-encoding', 'identity'), |
| ('content-encoding', 'gzip'), |
| ('content-encoding', ''), |
| ('content-language', ''), |
| ('content-length', ''), |
| ('content-location', ''), |
| ('content-range', ''), |
| ('content-type', ''), |
| ('cookie', ''), |
| ('date', ''), |
| ('etag', ''), |
| ('expect', ''), |
| ('expires', ''), |
| ('from', ''), |
| ('host', ''), |
| ('if-match', ''), |
| ('if-modified-since', ''), |
| ('if-none-match', ''), |
| ('if-range', ''), |
| ('if-unmodified-since', ''), |
| ('last-modified', ''), |
| ('lb-token', ''), |
| ('lb-cost-bin', ''), |
| ('link', ''), |
| ('location', ''), |
| ('max-forwards', ''), |
| ('proxy-authenticate', ''), |
| ('proxy-authorization', ''), |
| ('range', ''), |
| ('referer', ''), |
| ('refresh', ''), |
| ('retry-after', ''), |
| ('server', ''), |
| ('set-cookie', ''), |
| ('strict-transport-security', ''), |
| ('transfer-encoding', ''), |
| ('user-agent', ''), |
| ('vary', ''), |
| ('via', ''), |
| ('www-authenticate', ''), |
| ] |
| |
| # Entries marked with is_default=True are ignored when counting |
| # non-default initial metadata that prevents the chttp2 server from |
| # sending a Trailers-Only response. |
| METADATA_BATCH_CALLOUTS = [ |
| # (name, is_default) |
| (':path', True), |
| (':method', True), |
| (':status', True), |
| (':authority', True), |
| (':scheme', True), |
| ('te', True), |
| ('grpc-message', True), |
| ('grpc-status', True), |
| ('grpc-payload-bin', True), |
| ('grpc-encoding', True), |
| ('grpc-accept-encoding', True), |
| ('grpc-server-stats-bin', True), |
| ('grpc-tags-bin', True), |
| ('grpc-trace-bin', True), |
| ('content-type', True), |
| ('content-encoding', True), |
| ('accept-encoding', True), |
| ('grpc-internal-encoding-request', True), |
| ('grpc-internal-stream-encoding-request', True), |
| ('user-agent', True), |
| ('host', True), |
| ('lb-token', True), |
| ] |
| |
| COMPRESSION_ALGORITHMS = [ |
| 'identity', |
| 'deflate', |
| 'gzip', |
| ] |
| |
| STREAM_COMPRESSION_ALGORITHMS = [ |
| 'identity', |
| 'gzip', |
| ] |
| |
| # utility: mangle the name of a config |
| def mangle(elem, name=None): |
| xl = { |
| '-': '_', |
| ':': '', |
| '/': 'slash', |
| '.': 'dot', |
| ',': 'comma', |
| ' ': '_', |
| } |
| |
| def m0(x): |
| if not x: |
| return 'empty' |
| r = '' |
| for c in x: |
| put = xl.get(c, c.lower()) |
| if not put: |
| continue |
| last_is_underscore = r[-1] == '_' if r else True |
| if last_is_underscore and put == '_': |
| continue |
| elif len(put) > 1: |
| if not last_is_underscore: |
| r += '_' |
| r += put |
| r += '_' |
| else: |
| r += put |
| if r[-1] == '_': |
| r = r[:-1] |
| return r |
| |
| def n(default, name=name): |
| if name is None: |
| return 'grpc_%s_' % default |
| if name == '': |
| return '' |
| return 'grpc_%s_' % name |
| |
| if isinstance(elem, tuple): |
| return '%s%s_%s' % (n('mdelem'), m0(elem[0]), m0(elem[1])) |
| else: |
| return '%s%s' % (n('mdstr'), m0(elem)) |
| |
| |
| # utility: generate some hash value for a string |
| def fake_hash(elem): |
| return hashlib.md5(elem).hexdigest()[0:8] |
| |
| |
| # utility: print a big comment block into a set of files |
| def put_banner(files, banner): |
| for f in files: |
| print >> f, '/*' |
| for line in banner: |
| print >> f, ' * %s' % line |
| print >> f, ' */' |
| print >> f |
| |
| |
| # build a list of all the strings we need |
| all_strs = list() |
| all_elems = list() |
| static_userdata = {} |
| # put metadata batch callouts first, to make the check of if a static metadata |
| # string is a callout trivial |
| for elem, _ in METADATA_BATCH_CALLOUTS: |
| if elem not in all_strs: |
| all_strs.append(elem) |
| for elem in CONFIG: |
| if isinstance(elem, tuple): |
| if elem[0] not in all_strs: |
| all_strs.append(elem[0]) |
| if elem[1] not in all_strs: |
| all_strs.append(elem[1]) |
| if elem not in all_elems: |
| all_elems.append(elem) |
| else: |
| if elem not in all_strs: |
| all_strs.append(elem) |
| compression_elems = [] |
| for mask in range(1, 1 << len(COMPRESSION_ALGORITHMS)): |
| val = ','.join(COMPRESSION_ALGORITHMS[alg] |
| for alg in range(0, len(COMPRESSION_ALGORITHMS)) |
| if (1 << alg) & mask) |
| elem = ('grpc-accept-encoding', val) |
| if val not in all_strs: |
| all_strs.append(val) |
| if elem not in all_elems: |
| all_elems.append(elem) |
| compression_elems.append(elem) |
| static_userdata[elem] = 1 + (mask | 1) |
| stream_compression_elems = [] |
| for mask in range(1, 1 << len(STREAM_COMPRESSION_ALGORITHMS)): |
| val = ','.join(STREAM_COMPRESSION_ALGORITHMS[alg] |
| for alg in range(0, len(STREAM_COMPRESSION_ALGORITHMS)) |
| if (1 << alg) & mask) |
| elem = ('accept-encoding', val) |
| if val not in all_strs: |
| all_strs.append(val) |
| if elem not in all_elems: |
| all_elems.append(elem) |
| stream_compression_elems.append(elem) |
| static_userdata[elem] = 1 + (mask | 1) |
| |
| # output configuration |
| args = sys.argv[1:] |
| H = None |
| C = None |
| D = None |
| if args: |
| if 'header' in args: |
| H = sys.stdout |
| else: |
| H = open('/dev/null', 'w') |
| if 'source' in args: |
| C = sys.stdout |
| else: |
| C = open('/dev/null', 'w') |
| if 'dictionary' in args: |
| D = sys.stdout |
| else: |
| D = open('/dev/null', 'w') |
| else: |
| H = open( |
| os.path.join( |
| os.path.dirname(sys.argv[0]), |
| '../../../src/core/lib/transport/static_metadata.h'), 'w') |
| C = open( |
| os.path.join( |
| os.path.dirname(sys.argv[0]), |
| '../../../src/core/lib/transport/static_metadata.c'), 'w') |
| D = open( |
| os.path.join( |
| os.path.dirname(sys.argv[0]), |
| '../../../test/core/end2end/fuzzers/hpack.dictionary'), 'w') |
| |
| # copy-paste copyright notice from this file |
| with open(sys.argv[0]) as my_source: |
| copyright = [] |
| for line in my_source: |
| if line[0] != '#': |
| break |
| for line in my_source: |
| if line[0] == '#': |
| copyright.append(line) |
| break |
| for line in my_source: |
| if line[0] != '#': |
| break |
| copyright.append(line) |
| put_banner([H, C], [line[2:].rstrip() for line in copyright]) |
| |
| hex_bytes = [ord(c) for c in 'abcdefABCDEF0123456789'] |
| |
| |
| def esc_dict(line): |
| out = "\"" |
| for c in line: |
| if 32 <= c < 127: |
| if c != ord('"'): |
| out += chr(c) |
| else: |
| out += "\\\"" |
| else: |
| out += '\\x%02X' % c |
| return out + "\"" |
| |
| |
| put_banner([H, C], """WARNING: Auto-generated code. |
| |
| To make changes to this file, change |
| tools/codegen/core/gen_static_metadata.py, and then re-run it. |
| |
| See metadata.h for an explanation of the interface here, and metadata.c for |
| an explanation of what's going on. |
| """.splitlines()) |
| |
| print >> H, '#ifndef GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H' |
| print >> H, '#define GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H' |
| print >> H |
| print >> H, '#include "src/core/lib/transport/metadata.h"' |
| print >> H |
| |
| print >> C, '#include "src/core/lib/transport/static_metadata.h"' |
| print >> C |
| print >> C, '#include "src/core/lib/slice/slice_internal.h"' |
| print >> C |
| |
| str_ofs = 0 |
| id2strofs = {} |
| for i, elem in enumerate(all_strs): |
| id2strofs[i] = str_ofs |
| str_ofs += len(elem) |
| |
| |
| def slice_def(i): |
| return ('{.refcount = &grpc_static_metadata_refcounts[%d], .data.refcounted =' |
| ' {g_bytes+%d, %d}}') % ( |
| i, id2strofs[i], len(all_strs[i])) |
| |
| |
| # validate configuration |
| for elem, _ in METADATA_BATCH_CALLOUTS: |
| assert elem in all_strs |
| |
| print >> H, '#define GRPC_STATIC_MDSTR_COUNT %d' % len(all_strs) |
| print >> H, ('extern const grpc_slice ' |
| 'grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];') |
| for i, elem in enumerate(all_strs): |
| print >> H, '/* "%s" */' % elem |
| print >> H, '#define %s (grpc_static_slice_table[%d])' % ( |
| mangle(elem).upper(), i) |
| print >> H |
| print >> C, 'static uint8_t g_bytes[] = {%s};' % ( |
| ','.join('%d' % ord(c) for c in ''.join(all_strs))) |
| print >> C |
| print >> C, 'static void static_ref(void *unused) {}' |
| print >> C, 'static void static_unref(grpc_exec_ctx *exec_ctx, void *unused) {}' |
| print >> C, ('static const grpc_slice_refcount_vtable static_sub_vtable = ' |
| '{static_ref, static_unref, grpc_slice_default_eq_impl, ' |
| 'grpc_slice_default_hash_impl};') |
| print >> H, ('extern const grpc_slice_refcount_vtable ' |
| 'grpc_static_metadata_vtable;') |
| print >> C, ('const grpc_slice_refcount_vtable grpc_static_metadata_vtable = ' |
| '{static_ref, static_unref, grpc_static_slice_eq, ' |
| 'grpc_static_slice_hash};') |
| print >> C, ('static grpc_slice_refcount static_sub_refcnt = ' |
| '{&static_sub_vtable, &static_sub_refcnt};') |
| print >> H, ('extern grpc_slice_refcount ' |
| 'grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT];') |
| print >> C, ('grpc_slice_refcount ' |
| 'grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {') |
| for i, elem in enumerate(all_strs): |
| print >> C, ' {&grpc_static_metadata_vtable, &static_sub_refcnt},' |
| print >> C, '};' |
| print >> C |
| print >> H, '#define GRPC_IS_STATIC_METADATA_STRING(slice) \\' |
| print >> H, (' ((slice).refcount != NULL && (slice).refcount->vtable == ' |
| '&grpc_static_metadata_vtable)') |
| print >> H |
| print >> C, ('const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT]' |
| ' = {') |
| for i, elem in enumerate(all_strs): |
| print >> C, slice_def(i) + ',' |
| print >> C, '};' |
| print >> C |
| print >> H, '#define GRPC_STATIC_METADATA_INDEX(static_slice) \\' |
| print >> H, (' ((int)((static_slice).refcount - ' |
| 'grpc_static_metadata_refcounts))') |
| print >> H |
| |
| print >> D, '# hpack fuzzing dictionary' |
| for i, elem in enumerate(all_strs): |
| print >> D, '%s' % (esc_dict([len(elem)] + [ord(c) for c in elem])) |
| for i, elem in enumerate(all_elems): |
| print >> D, '%s' % (esc_dict([0, len(elem[0])] + [ord(c) for c in elem[0]] + |
| [len(elem[1])] + [ord(c) for c in elem[1]])) |
| |
| print >> H, '#define GRPC_STATIC_MDELEM_COUNT %d' % len(all_elems) |
| print >> H, ('extern grpc_mdelem_data ' |
| 'grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT];') |
| print >> H, ('extern uintptr_t ' |
| 'grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT];') |
| for i, elem in enumerate(all_elems): |
| print >> H, '/* "%s": "%s" */' % elem |
| print >> H, ('#define %s (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[%d], ' |
| 'GRPC_MDELEM_STORAGE_STATIC))') % ( |
| mangle(elem).upper(), i) |
| print >> H |
| print >> C, ('uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] ' |
| '= {') |
| print >> C, ' %s' % ','.join('%d' % static_userdata.get(elem, 0) |
| for elem in all_elems) |
| print >> C, '};' |
| print >> C |
| |
| |
| def str_idx(s): |
| for i, s2 in enumerate(all_strs): |
| if s == s2: |
| return i |
| |
| |
| def md_idx(m): |
| for i, m2 in enumerate(all_elems): |
| if m == m2: |
| return i |
| |
| |
| def offset_trials(mink): |
| yield 0 |
| for i in range(1, 100): |
| for mul in [-1, 1]: |
| yield mul * i |
| |
| |
| def perfect_hash(keys, name): |
| p = perfection.hash_parameters(keys) |
| |
| def f(i, p=p): |
| i += p.offset |
| x = i % p.t |
| y = i / p.t |
| return x + p.r[y] |
| |
| return { |
| 'PHASHRANGE': |
| p.t - 1 + max(p.r), |
| 'PHASHNKEYS': |
| len(p.slots), |
| 'pyfunc': |
| f, |
| 'code': |
| """ |
| static const int8_t %(name)s_r[] = {%(r)s}; |
| static uint32_t %(name)s_phash(uint32_t i) { |
| i %(offset_sign)s= %(offset)d; |
| uint32_t x = i %% %(t)d; |
| uint32_t y = i / %(t)d; |
| uint32_t h = x; |
| if (y < GPR_ARRAY_SIZE(%(name)s_r)) { |
| uint32_t delta = (uint32_t)%(name)s_r[y]; |
| h += delta; |
| } |
| return h; |
| } |
| """ % { |
| 'name': name, |
| 'r': ','.join('%d' % (r if r is not None else 0) for r in p.r), |
| 't': p.t, |
| 'offset': abs(p.offset), |
| 'offset_sign': '+' if p.offset > 0 else '-' |
| } |
| } |
| |
| |
| elem_keys = [ |
| str_idx(elem[0]) * len(all_strs) + str_idx(elem[1]) for elem in all_elems |
| ] |
| elem_hash = perfect_hash(elem_keys, 'elems') |
| print >> C, elem_hash['code'] |
| |
| keys = [0] * int(elem_hash['PHASHRANGE']) |
| idxs = [255] * int(elem_hash['PHASHNKEYS']) |
| for i, k in enumerate(elem_keys): |
| h = elem_hash['pyfunc'](k) |
| assert keys[h] == 0 |
| keys[h] = k |
| idxs[h] = i |
| print >> C, 'static const uint16_t elem_keys[] = {%s};' % ','.join( |
| '%d' % k for k in keys) |
| print >> C, 'static const uint8_t elem_idxs[] = {%s};' % ','.join( |
| '%d' % i for i in idxs) |
| print >> C |
| |
| print >> H, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b);' |
| print >> C, 'grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {' |
| print >> C, ' if (a == -1 || b == -1) return GRPC_MDNULL;' |
| print >> C, ' uint32_t k = (uint32_t)(a * %d + b);' % len(all_strs) |
| print >> C, ' uint32_t h = elems_phash(k);' |
| print >> C, ' return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k && elem_idxs[h] != 255 ? GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[elem_idxs[h]], GRPC_MDELEM_STORAGE_STATIC) : GRPC_MDNULL;' |
| print >> C, '}' |
| print >> C |
| |
| print >> C, 'grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {' |
| for a, b in all_elems: |
| print >> C, '{%s,%s},' % (slice_def(str_idx(a)), slice_def(str_idx(b))) |
| print >> C, '};' |
| |
| print >> H, 'typedef enum {' |
| for elem, _ in METADATA_BATCH_CALLOUTS: |
| print >> H, ' %s,' % mangle(elem, 'batch').upper() |
| print >> H, ' GRPC_BATCH_CALLOUTS_COUNT' |
| print >> H, '} grpc_metadata_batch_callouts_index;' |
| print >> H |
| print >> H, 'typedef union {' |
| print >> H, ' struct grpc_linked_mdelem *array[GRPC_BATCH_CALLOUTS_COUNT];' |
| print >> H, ' struct {' |
| for elem, _ in METADATA_BATCH_CALLOUTS: |
| print >> H, ' struct grpc_linked_mdelem *%s;' % mangle(elem, '').lower() |
| print >> H, ' } named;' |
| print >> H, '} grpc_metadata_batch_callouts;' |
| print >> H |
| print >> H, '#define GRPC_BATCH_INDEX_OF(slice) \\' |
| print >> H, ' (GRPC_IS_STATIC_METADATA_STRING((slice)) ? (grpc_metadata_batch_callouts_index)GPR_CLAMP(GRPC_STATIC_METADATA_INDEX((slice)), 0, GRPC_BATCH_CALLOUTS_COUNT) : GRPC_BATCH_CALLOUTS_COUNT)' |
| print >> H |
| print >> H, ('extern bool grpc_static_callout_is_default[' |
| 'GRPC_BATCH_CALLOUTS_COUNT];') |
| print >> H |
| print >> C, 'bool grpc_static_callout_is_default[GRPC_BATCH_CALLOUTS_COUNT] = {' |
| for elem, is_default in METADATA_BATCH_CALLOUTS: |
| print >> C, ' %s, // %s' % (str(is_default).lower(), elem) |
| print >> C, '};' |
| print >> C |
| |
| print >> H, 'extern const uint8_t grpc_static_accept_encoding_metadata[%d];' % ( |
| 1 << len(COMPRESSION_ALGORITHMS)) |
| print >> C, 'const uint8_t grpc_static_accept_encoding_metadata[%d] = {' % ( |
| 1 << len(COMPRESSION_ALGORITHMS)) |
| print >> C, '0,%s' % ','.join('%d' % md_idx(elem) for elem in compression_elems) |
| print >> C, '};' |
| print >> C |
| |
| print >> H, '#define GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))' |
| print >> H |
| |
| print >> H, 'extern const uint8_t grpc_static_accept_stream_encoding_metadata[%d];' % ( |
| 1 << len(STREAM_COMPRESSION_ALGORITHMS)) |
| print >> C, 'const uint8_t grpc_static_accept_stream_encoding_metadata[%d] = {' % ( |
| 1 << len(STREAM_COMPRESSION_ALGORITHMS)) |
| print >> C, '0,%s' % ','.join('%d' % md_idx(elem) for elem in stream_compression_elems) |
| print >> C, '};' |
| |
| print >> H, '#define GRPC_MDELEM_ACCEPT_STREAM_ENCODING_FOR_ALGORITHMS(algs) (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table[grpc_static_accept_stream_encoding_metadata[(algs)]], GRPC_MDELEM_STORAGE_STATIC))' |
| |
| print >> H, '#endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */' |
| |
| H.close() |
| C.close() |