Mercurial > hg > nginx-quic
view src/stream/ngx_stream_script.h @ 7119:fef61d26da39
Fixed buffer overread with unix sockets after accept().
Some OSes (notably macOS, NetBSD, and Solaris) allow unix socket addresses
larger than struct sockaddr_un. Moreover, some of them (macOS, Solaris)
return socklen of the socket address before it was truncated to fit the
buffer provided. As such, on these systems socklen must not be used without
additional check that it is within the buffer provided.
Appropriate checks added to ngx_event_accept() (after accept()),
ngx_event_recvmsg() (after recvmsg()), and ngx_set_inherited_sockets()
(after getsockname()).
We also obtain socket addresses via getsockname() in
ngx_connection_local_sockaddr(), but it does not need any checks as
it is only used for INET and INET6 sockets (as there can be no
wildcard unix sockets).
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 04 Oct 2017 21:19:33 +0300 |
parents | 0125b151c9a5 |
children | b82162b8496a |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_STREAM_SCRIPT_H_INCLUDED_ #define _NGX_STREAM_SCRIPT_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { u_char *ip; u_char *pos; ngx_stream_variable_value_t *sp; ngx_str_t buf; ngx_str_t line; unsigned flushed:1; unsigned skip:1; ngx_stream_session_t *session; } ngx_stream_script_engine_t; typedef struct { ngx_conf_t *cf; ngx_str_t *source; ngx_array_t **flushes; ngx_array_t **lengths; ngx_array_t **values; ngx_uint_t variables; ngx_uint_t ncaptures; ngx_uint_t size; void *main; unsigned complete_lengths:1; unsigned complete_values:1; unsigned zero:1; unsigned conf_prefix:1; unsigned root_prefix:1; } ngx_stream_script_compile_t; typedef struct { ngx_str_t value; ngx_uint_t *flushes; void *lengths; void *values; } ngx_stream_complex_value_t; typedef struct { ngx_conf_t *cf; ngx_str_t *value; ngx_stream_complex_value_t *complex_value; unsigned zero:1; unsigned conf_prefix:1; unsigned root_prefix:1; } ngx_stream_compile_complex_value_t; typedef void (*ngx_stream_script_code_pt) (ngx_stream_script_engine_t *e); typedef size_t (*ngx_stream_script_len_code_pt) (ngx_stream_script_engine_t *e); typedef struct { ngx_stream_script_code_pt code; uintptr_t len; } ngx_stream_script_copy_code_t; typedef struct { ngx_stream_script_code_pt code; uintptr_t index; } ngx_stream_script_var_code_t; typedef struct { ngx_stream_script_code_pt code; uintptr_t n; } ngx_stream_script_copy_capture_code_t; typedef struct { ngx_stream_script_code_pt code; uintptr_t conf_prefix; } ngx_stream_script_full_name_code_t; void ngx_stream_script_flush_complex_value(ngx_stream_session_t *s, ngx_stream_complex_value_t *val); ngx_int_t ngx_stream_complex_value(ngx_stream_session_t *s, ngx_stream_complex_value_t *val, ngx_str_t *value); ngx_int_t ngx_stream_compile_complex_value( ngx_stream_compile_complex_value_t *ccv); char *ngx_stream_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); ngx_uint_t ngx_stream_script_variables_count(ngx_str_t *value); ngx_int_t ngx_stream_script_compile(ngx_stream_script_compile_t *sc); u_char *ngx_stream_script_run(ngx_stream_session_t *s, ngx_str_t *value, void *code_lengths, size_t reserved, void *code_values); void ngx_stream_script_flush_no_cacheable_variables(ngx_stream_session_t *s, ngx_array_t *indices); void *ngx_stream_script_add_code(ngx_array_t *codes, size_t size, void *code); size_t ngx_stream_script_copy_len_code(ngx_stream_script_engine_t *e); void ngx_stream_script_copy_code(ngx_stream_script_engine_t *e); size_t ngx_stream_script_copy_var_len_code(ngx_stream_script_engine_t *e); void ngx_stream_script_copy_var_code(ngx_stream_script_engine_t *e); size_t ngx_stream_script_copy_capture_len_code(ngx_stream_script_engine_t *e); void ngx_stream_script_copy_capture_code(ngx_stream_script_engine_t *e); #endif /* _NGX_STREAM_SCRIPT_H_INCLUDED_ */