mirror of
https://github.com/moparisthebest/spdylay
synced 2024-11-11 20:15:04 -05:00
1655 lines
53 KiB
C
1655 lines
53 KiB
C
#include <stdio.h>
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#include <time.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <unistd.h>
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#include "htparse.h"
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#ifdef PARSER_DEBUG
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#define __QUOTE(x) # x
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#define _QUOTE(x) __QUOTE(x)
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#define htparse_debug_strlen(x) strlen(x)
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#define htparse_log_debug(fmt, ...) do { \
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time_t t = time(NULL); \
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struct tm * dm = localtime(&t); \
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\
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fprintf(stdout, "[%02d:%02d:%02d] htparse.c:[" _QUOTE(__LINE__) "]\t %-26s: " \
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fmt "\n", dm->tm_hour, dm->tm_min, dm->tm_sec, __func__, ## __VA_ARGS__); \
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fflush(stdout); \
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} while (0)
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#else
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#define htparse_debug_strlen(x) 0
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#define htparse_log_debug(fmt, ...) do {} while (0)
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#endif
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#if '\n' != '\x0a' || 'A' != 65
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#error "You have somehow found a non-ASCII host. We can't build here."
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#endif
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#define PARSER_STACK_MAX 8192
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#define LF (unsigned char)10
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#define CR (unsigned char)13
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#define CRLF "\x0d\x0a"
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typedef enum eval_hdr_val eval_hdr_val;
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typedef enum parser_flags parser_flags;
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typedef enum parser_state parser_state;
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enum eval_hdr_val {
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eval_hdr_val_none = 0,
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eval_hdr_val_connection,
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eval_hdr_val_proxy_connection,
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eval_hdr_val_content_length,
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eval_hdr_val_transfer_encoding
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};
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enum parser_flags {
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parser_flag_chunked = 1 << 0,
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parser_flag_connection_keep_alive = 1 << 1,
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parser_flag_connection_close = 1 << 2,
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parser_flag_trailing = 1 << 3,
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};
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enum parser_state {
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s_start = 0,
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s_method,
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s_spaces_before_uri,
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s_schema,
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s_schema_slash,
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s_schema_slash_slash,
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s_host,
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s_port,
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s_after_slash_in_uri,
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s_check_uri,
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s_uri,
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s_http_09,
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s_http_H,
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s_http_HT,
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s_http_HTT,
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s_http_HTTP,
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s_first_major_digit,
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s_major_digit,
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s_first_minor_digit,
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s_minor_digit,
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s_spaces_after_digit,
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s_almost_done,
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s_done,
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s_hdrline_start,
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s_hdrline_hdr_almost_done,
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s_hdrline_hdr_done,
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s_hdrline_hdr_key,
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s_hdrline_hdr_space_before_val,
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s_hdrline_hdr_val,
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s_hdrline_almost_done,
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s_hdrline_done,
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s_body_read,
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s_chunk_size_start,
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s_chunk_size,
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s_chunk_size_almost_done,
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s_chunk_data,
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s_chunk_data_almost_done,
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s_chunk_data_done,
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s_status,
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s_space_after_status,
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s_status_text
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};
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struct htparser {
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htpparse_error error;
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parser_state state;
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parser_flags flags;
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eval_hdr_val heval;
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htp_type type;
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htp_scheme scheme;
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htp_method method;
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unsigned char major;
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unsigned char minor;
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uint64_t content_len;
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uint64_t bytes_read;
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uint64_t total_bytes_read;
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unsigned int status; /* only for responses */
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unsigned int status_count; /* only for responses */
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char buf[PARSER_STACK_MAX];
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unsigned int buf_idx;
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char * scheme_offset;
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char * host_offset;
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char * port_offset;
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char * path_offset;
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char * args_offset;
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void * userdata;
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};
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static uint32_t usual[] = {
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0xffffdbfe,
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0x7fff37d6,
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0xffffffff,
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0xffffffff,
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0xffffffff,
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0xffffffff,
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0xffffffff,
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0xffffffff
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};
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static int8_t unhex[256] = {
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
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-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
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};
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static const char * errstr_map[] = {
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"htparse_error_none",
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"htparse_error_too_big",
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"htparse_error_invalid_method",
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"htparse_error_invalid_requestline",
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"htparse_error_invalid_schema",
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"htparse_error_invalid_protocol",
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"htparse_error_invalid_version",
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"htparse_error_invalid_header",
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"htparse_error_invalid_chunk_size",
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"htparse_error_invalid_chunk",
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"htparse_error_invalid_state",
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"htparse_error_user",
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"htparse_error_unknown"
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};
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static const char * method_strmap[] = {
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"GET",
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"HEAD",
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"POST",
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"PUT",
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"DELETE",
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"MKCOL",
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"COPY",
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"MOVE",
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"OPTIONS",
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"PROPFIND",
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"PROPATCH",
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"LOCK",
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"UNLOCK",
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"TRACE"
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};
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static inline uint32_t to_uint32(char *m) {
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return (m[3] << 24) | (m[2] << 16) | (m[1] << 8) | m[0];
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}
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#define _MIN_READ(a, b) ((a) < (b) ? (a) : (b))
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#define _str3_cmp(m, c0, c1, c2, c3) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
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#define _str3Ocmp(m, c0, c1, c2, c3) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
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#define _str4cmp(m, c0, c1, c2, c3) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
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#define _str5cmp(m, c0, c1, c2, c3, c4) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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&& m[4] == c4
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#define _str6cmp(m, c0, c1, c2, c3, c4, c5) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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&& (to_uint32(m+4) & 0xffff) == ((c5 << 8) | c4)
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#define _str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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&& to_uint32(m+4) == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)
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#define _str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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&& to_uint32(m) == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)
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#define _str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8) \
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to_uint32(m) == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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&& to_uint32(m) == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4) \
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&& m[8] == c8
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#define __HTPARSE_GENHOOK(__n) \
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static inline int hook_ ## __n ## _run(htparser * p, htparse_hooks * hooks) { \
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htparse_log_debug("enter"); \
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if (hooks && (hooks)->__n) { \
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return (hooks)->__n(p); \
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} \
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\
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return 0; \
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}
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#define __HTPARSE_GENDHOOK(__n) \
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static inline int hook_ ## __n ## _run(htparser * p, htparse_hooks * hooks, const char * s, size_t l) { \
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htparse_log_debug("enter"); \
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if (hooks && (hooks)->__n) { \
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return (hooks)->__n(p, s, l); \
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} \
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\
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return 0; \
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}
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__HTPARSE_GENHOOK(on_msg_begin);
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__HTPARSE_GENHOOK(on_hdrs_begin);
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__HTPARSE_GENHOOK(on_hdrs_complete);
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__HTPARSE_GENHOOK(on_new_chunk);
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__HTPARSE_GENHOOK(on_chunk_complete);
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__HTPARSE_GENHOOK(on_chunks_complete);
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__HTPARSE_GENHOOK(on_msg_complete);
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__HTPARSE_GENDHOOK(method);
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__HTPARSE_GENDHOOK(scheme);
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__HTPARSE_GENDHOOK(host);
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__HTPARSE_GENDHOOK(port);
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__HTPARSE_GENDHOOK(path);
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__HTPARSE_GENDHOOK(args);
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__HTPARSE_GENDHOOK(uri);
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__HTPARSE_GENDHOOK(hdr_key);
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__HTPARSE_GENDHOOK(hdr_val);
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__HTPARSE_GENDHOOK(body);
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static inline uint64_t
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str_to_uint64(char * str, size_t n, int * err) {
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uint64_t value;
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if (n > 20) {
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/* 18446744073709551615 is 20 bytes */
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*err = 1;
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return 0;
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}
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for (value = 0; n--; str++) {
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uint64_t check;
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if (*str < '0' || *str > '9') {
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*err = 1;
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return 0;
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}
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check = value * 10 + (*str - '0');
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if ((value && check <= value) || check > UINT64_MAX) {
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*err = 1;
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return 0;
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}
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value = check;
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}
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return value;
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}
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static inline ssize_t
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_str_to_ssize_t(char * str, size_t n) {
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ssize_t value;
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if (n == 0) {
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return -1;
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}
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for (value = 0; n--; str++) {
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if (*str < '0' || *str > '9') {
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return -1;
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}
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value = value * 10 + (*str - '0');
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#if 0
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if (value > INTMAX_MAX) {
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return -1;
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}
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#endif
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}
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return value;
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}
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htpparse_error
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htparser_get_error(htparser * p) {
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return p->error;
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}
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const char *
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htparser_get_strerror(htparser * p) {
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htpparse_error e = htparser_get_error(p);
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if (e > htparse_error_generic) {
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return "htparse_no_such_error";
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}
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return errstr_map[e];
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}
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unsigned int
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htparser_get_status(htparser * p) {
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return p->status;
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}
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int
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htparser_should_keep_alive(htparser * p) {
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if (p->major > 0 && p->minor > 0) {
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if (p->flags & parser_flag_connection_close) {
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return 0;
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} else {
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return 1;
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}
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} else {
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if (p->flags & parser_flag_connection_keep_alive) {
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return 1;
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} else {
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return 0;
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}
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}
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return 0;
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}
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htp_scheme
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htparser_get_scheme(htparser * p) {
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return p->scheme;
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}
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htp_method
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htparser_get_method(htparser * p) {
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return p->method;
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}
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const char *
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htparser_get_methodstr(htparser * p) {
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if (p->method >= htp_method_UNKNOWN) {
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return NULL;
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}
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return method_strmap[p->method];
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}
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void
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htparser_set_major(htparser * p, unsigned char major) {
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p->major = major;
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}
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void
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htparser_set_minor(htparser * p, unsigned char minor) {
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p->minor = minor;
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}
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unsigned char
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htparser_get_major(htparser * p) {
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return p->major;
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}
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unsigned char
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htparser_get_minor(htparser * p) {
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return p->minor;
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}
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void *
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htparser_get_userdata(htparser * p) {
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return p->userdata;
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}
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void
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htparser_set_userdata(htparser * p, void * ud) {
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p->userdata = ud;
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}
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uint64_t
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htparser_get_content_length(htparser * p) {
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return p->content_len;
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}
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uint64_t
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htparser_get_bytes_read(htparser * p) {
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return p->bytes_read;
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}
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uint64_t
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htparser_get_total_bytes_read(htparser * p) {
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return p->total_bytes_read;
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}
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void
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htparser_init(htparser * p, htp_type type) {
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memset(p, 0, sizeof(htparser));
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p->error = htparse_error_none;
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p->type = type;
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}
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htparser *
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htparser_new(void) {
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return malloc(sizeof(htparser));
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}
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size_t
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htparser_run(htparser * p, htparse_hooks * hooks, const char * data, size_t len) {
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unsigned char ch;
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char c;
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size_t i;
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htparse_log_debug("enter");
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htparse_log_debug("p == %p", p);
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p->error = htparse_error_none;
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p->bytes_read = 0;
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for (i = 0; i < len; i++) {
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int res;
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int err;
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ch = data[i];
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htparse_log_debug("[%p] data[%d] = %c (%x)", p, i, isprint(ch) ? ch : ' ', ch);
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if (p->buf_idx >= sizeof(p->buf)) {
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p->error = htparse_error_too_big;
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return i + 1;
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}
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p->total_bytes_read += 1;
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p->bytes_read += 1;
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switch (p->state) {
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case s_start:
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htparse_log_debug("[%p] s_start", p);
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p->flags = 0;
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if (ch == CR || ch == LF) {
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break;
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}
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if ((ch < 'A' || ch > 'Z') && ch != '_') {
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p->error = htparse_error_inval_reqline;
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return i + 1;
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}
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res = hook_on_msg_begin_run(p, hooks);
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p->buf[p->buf_idx++] = ch;
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p->buf[p->buf_idx] = '\0';
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if (p->type == htp_type_request) {
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p->state = s_method;
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} else if (p->type == htp_type_response && ch == 'H') {
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p->state = s_http_H;
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} else {
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p->error = htparse_error_inval_reqline;
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return i + 1;
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}
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if (res) {
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p->error = htparse_error_user;
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return i + 1;
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}
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break;
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case s_method:
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htparse_log_debug("[%p] s_method", p);
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if (ch == ' ') {
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char * m = p->buf;
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switch (p->buf_idx) {
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case 3:
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if (_str3_cmp(m, 'G', 'E', 'T', '\0')) {
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p->method = htp_method_GET;
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break;
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}
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if (_str3_cmp(m, 'P', 'U', 'T', '\0')) {
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p->method = htp_method_PUT;
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break;
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}
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break;
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case 4:
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if (m[1] == 'O') {
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if (_str3Ocmp(m, 'P', 'O', 'S', 'T')) {
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|
p->method = htp_method_POST;
|
|
break;
|
|
}
|
|
|
|
if (_str3Ocmp(m, 'C', 'O', 'P', 'Y')) {
|
|
p->method = htp_method_COPY;
|
|
break;
|
|
}
|
|
|
|
if (_str3Ocmp(m, 'M', 'O', 'V', 'E')) {
|
|
p->method = htp_method_MOVE;
|
|
break;
|
|
}
|
|
|
|
if (_str3Ocmp(m, 'L', 'O', 'C', 'K')) {
|
|
p->method = htp_method_LOCK;
|
|
break;
|
|
}
|
|
} else {
|
|
if (_str4cmp(m, 'H', 'E', 'A', 'D')) {
|
|
p->method = htp_method_HEAD;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case 5:
|
|
if (_str5cmp(m, 'M', 'K', 'C', 'O', 'L')) {
|
|
p->method = htp_method_MKCOL;
|
|
break;
|
|
}
|
|
|
|
if (_str5cmp(m, 'T', 'R', 'A', 'C', 'E')) {
|
|
p->method = htp_method_TRACE;
|
|
break;
|
|
}
|
|
break;
|
|
case 6:
|
|
if (_str6cmp(m, 'D', 'E', 'L', 'E', 'T', 'E')) {
|
|
p->method = htp_method_DELETE;
|
|
break;
|
|
}
|
|
|
|
if (_str6cmp(m, 'U', 'N', 'L', 'O', 'C', 'K')) {
|
|
p->method = htp_method_UNLOCK;
|
|
break;
|
|
}
|
|
break;
|
|
case 7:
|
|
if (_str7_cmp(m, 'O', 'P', 'T', 'I', 'O', 'N', 'S', '\0')) {
|
|
p->method = htp_method_OPTIONS;
|
|
}
|
|
|
|
break;
|
|
case 8:
|
|
if (_str8cmp(m, 'P', 'R', 'O', 'P', 'F', 'I', 'N', 'D')) {
|
|
p->method = htp_method_PROPFIND;
|
|
}
|
|
|
|
break;
|
|
|
|
case 9:
|
|
if (_str9cmp(m, 'P', 'R', 'O', 'P', 'P', 'A', 'T', 'C', 'H')) {
|
|
p->method = htp_method_PROPPATCH;
|
|
}
|
|
break;
|
|
} /* switch */
|
|
|
|
res = hook_method_run(p, hooks, p->buf, p->buf_idx);
|
|
p->buf_idx = 0;
|
|
p->state = s_spaces_before_uri;
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if ((ch < 'A' || ch > 'Z') && ch != '_') {
|
|
p->error = htparse_error_inval_method;
|
|
return i + 1;
|
|
}
|
|
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
break;
|
|
case s_spaces_before_uri:
|
|
htparse_log_debug("[%p] s_spaces_before_uri", p);
|
|
|
|
switch (ch) {
|
|
case ' ':
|
|
break;
|
|
case '/':
|
|
p->path_offset = &p->buf[p->buf_idx];
|
|
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->state = s_after_slash_in_uri;
|
|
break;
|
|
default:
|
|
c = (unsigned char)(ch | 0x20);
|
|
|
|
if (c >= 'a' && c <= 'z') {
|
|
p->scheme_offset = &p->buf[p->buf_idx];
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->state = s_schema;
|
|
break;
|
|
}
|
|
|
|
p->error = htparse_error_inval_reqline;
|
|
return i + 1;
|
|
} /* switch */
|
|
|
|
break;
|
|
case s_schema:
|
|
htparse_log_debug("[%p] s_schema", p);
|
|
|
|
c = (unsigned char)(ch | 0x20);
|
|
|
|
if (c >= 'a' && c <= 'z') {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
}
|
|
|
|
switch (ch) {
|
|
case ':':
|
|
p->scheme = htp_scheme_unknown;
|
|
|
|
switch (p->buf_idx) {
|
|
case 3:
|
|
if (_str3_cmp(p->scheme_offset, 'f', 't', 'p', ' ')) {
|
|
p->scheme = htp_scheme_ftp;
|
|
break;
|
|
}
|
|
|
|
if (_str3_cmp(p->scheme_offset, 'n', 'f', 's', ' ')) {
|
|
p->scheme = htp_scheme_nfs;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
case 4:
|
|
if (_str4cmp(p->scheme_offset, 'h', 't', 't', 'p')) {
|
|
p->scheme = htp_scheme_http;
|
|
break;
|
|
}
|
|
break;
|
|
case 5:
|
|
if (_str5cmp(p->scheme_offset, 'h', 't', 't', 'p', 's')) {
|
|
p->scheme = htp_scheme_https;
|
|
break;
|
|
}
|
|
break;
|
|
} /* switch */
|
|
|
|
res = hook_scheme_run(p, hooks, p->scheme_offset, p->buf_idx);
|
|
|
|
#if 0
|
|
p->buf_idx = 0;
|
|
p->buf[0] = '\0';
|
|
#endif
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_schema_slash;
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_schema;
|
|
return i + 1;
|
|
} /* switch */
|
|
|
|
break;
|
|
case s_schema_slash:
|
|
htparse_log_debug("[%p] s_schema_slash", p);
|
|
|
|
switch (ch) {
|
|
case '/':
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_schema_slash_slash;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_schema;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_schema_slash_slash:
|
|
htparse_log_debug("[%p] s_schema_slash_slash", p);
|
|
|
|
switch (ch) {
|
|
case '/':
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->host_offset = &p->buf[p->buf_idx];
|
|
|
|
p->state = s_host;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_schema;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_host:
|
|
c = (unsigned char)(ch | 0x20);
|
|
|
|
if (c >= 'a' && c <= 'z') {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
}
|
|
|
|
if ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-') {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
}
|
|
|
|
res = hook_host_run(p, hooks, p->host_offset, (&p->buf[p->buf_idx] - p->host_offset));
|
|
|
|
switch (ch) {
|
|
case ':':
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->port_offset = &p->buf[p->buf_idx];
|
|
p->state = s_port;
|
|
break;
|
|
case '/':
|
|
p->path_offset = &p->buf[p->buf_idx];
|
|
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_after_slash_in_uri;
|
|
break;
|
|
case ' ':
|
|
/* p->buf should contain the whole uri */
|
|
p->state = s_http_09;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_schema;
|
|
return i + 1;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case s_port:
|
|
res = 0;
|
|
|
|
if (ch >= '0' && ch <= '9') {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
}
|
|
|
|
res = hook_port_run(p, hooks, p->buf, p->buf_idx);
|
|
|
|
switch (ch) {
|
|
case '/':
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->path_offset = &p->buf[p->buf_idx - 1];
|
|
|
|
p->state = s_after_slash_in_uri;
|
|
break;
|
|
case ' ':
|
|
p->state = s_http_09;
|
|
p->buf_idx = 0;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_reqline;
|
|
return i + 1;
|
|
}
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case s_after_slash_in_uri:
|
|
htparse_log_debug("[%p] s_after_slash_in_uri", p);
|
|
|
|
res = 0;
|
|
|
|
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->state = s_check_uri;
|
|
break;
|
|
}
|
|
|
|
switch (ch) {
|
|
case ' ':
|
|
{
|
|
int r1 = hook_path_run(p, hooks, p->path_offset, p->buf_idx);
|
|
int r2 = hook_uri_run(p, hooks, p->buf, p->buf_idx);
|
|
|
|
p->state = s_http_09;
|
|
p->buf_idx = 0;
|
|
|
|
if (r1 || r2) {
|
|
res = 1;
|
|
}
|
|
}
|
|
|
|
break;
|
|
case CR:
|
|
p->minor = 9;
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->minor = 9;
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
case '.':
|
|
case '%':
|
|
case '/':
|
|
case '#':
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->state = s_uri;
|
|
break;
|
|
case '?':
|
|
res = hook_path_run(p, hooks, p->buf, p->buf_idx);
|
|
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->args_offset = &p->buf[p->buf_idx];
|
|
p->state = s_uri;
|
|
|
|
break;
|
|
default:
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_check_uri;
|
|
break;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case s_check_uri:
|
|
htparse_log_debug("[%p] s_check_uri", p);
|
|
|
|
res = 0;
|
|
|
|
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
}
|
|
|
|
switch (ch) {
|
|
case ' ':
|
|
{
|
|
int r1 = 0;
|
|
int r2 = 0;
|
|
|
|
if (p->args_offset) {
|
|
r1 = hook_args_run(p, hooks, p->args_offset, p->buf_idx);
|
|
} else {
|
|
r1 = hook_path_run(p, hooks, p->buf, p->buf_idx);
|
|
}
|
|
|
|
r2 = hook_uri_run(p, hooks, p->buf, p->buf_idx);
|
|
p->buf_idx = 0;
|
|
p->state = s_http_09;
|
|
|
|
if (r1 || r2) {
|
|
res = 1;
|
|
}
|
|
}
|
|
break;
|
|
case '/':
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->state = s_after_slash_in_uri;
|
|
break;
|
|
case CR:
|
|
p->minor = 9;
|
|
p->buf_idx = 0;
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->minor = 9;
|
|
p->buf_idx = 0;
|
|
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
default:
|
|
if (ch == '?') {
|
|
res = hook_path_run(p, hooks, p->path_offset, (&p->buf[p->buf_idx] - p->path_offset));
|
|
p->args_offset = &p->buf[p->buf_idx];
|
|
}
|
|
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_uri;
|
|
|
|
break;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case s_uri:
|
|
htparse_log_debug("[%p] s_uri", p);
|
|
|
|
res = 0;
|
|
|
|
if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
}
|
|
|
|
switch (ch) {
|
|
case ' ':
|
|
{
|
|
int r1 = 0;
|
|
int r2 = 0;
|
|
|
|
if (p->args_offset) {
|
|
r1 = hook_args_run(p, hooks, p->args_offset,
|
|
(&p->buf[p->buf_idx] - p->args_offset));
|
|
} else {
|
|
r1 = hook_path_run(p, hooks, p->path_offset,
|
|
(&p->buf[p->buf_idx] - p->path_offset));
|
|
}
|
|
|
|
r2 = hook_uri_run(p, hooks, p->path_offset,
|
|
(&p->buf[p->buf_idx] - p->path_offset));
|
|
|
|
p->buf_idx = 0;
|
|
p->state = s_http_09;
|
|
|
|
if (r1 || r2) {
|
|
res = 1;
|
|
}
|
|
}
|
|
break;
|
|
case CR:
|
|
p->minor = 9;
|
|
p->buf_idx = 0;
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->minor = 9;
|
|
p->buf_idx = 0;
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
default:
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case s_http_09:
|
|
htparse_log_debug("[%p] s_http_09", p);
|
|
|
|
switch (ch) {
|
|
case ' ':
|
|
break;
|
|
case CR:
|
|
p->minor = 9;
|
|
p->buf_idx = 0;
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->minor = 9;
|
|
p->buf_idx = 0;
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
case 'H':
|
|
p->buf_idx = 0;
|
|
p->state = s_http_H;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_proto;
|
|
return i + 1;
|
|
} /* switch */
|
|
|
|
break;
|
|
case s_http_H:
|
|
htparse_log_debug("[%p] s_http_H", p);
|
|
|
|
switch (ch) {
|
|
case 'T':
|
|
p->state = s_http_HT;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_proto;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_http_HT:
|
|
switch (ch) {
|
|
case 'T':
|
|
p->state = s_http_HTT;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_proto;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_http_HTT:
|
|
switch (ch) {
|
|
case 'P':
|
|
p->state = s_http_HTTP;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_proto;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_http_HTTP:
|
|
switch (ch) {
|
|
case '/':
|
|
p->state = s_first_major_digit;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_proto;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_first_major_digit:
|
|
if (ch < '1' || ch > '9') {
|
|
p->error = htparse_error_inval_ver;
|
|
return i + 1;
|
|
}
|
|
|
|
p->major = ch - '0';
|
|
p->state = s_major_digit;
|
|
break;
|
|
case s_major_digit:
|
|
if (ch == '.') {
|
|
p->state = s_first_minor_digit;
|
|
break;
|
|
}
|
|
|
|
if (ch < '0' || ch > '9') {
|
|
p->error = htparse_error_inval_ver;
|
|
return i + 1;
|
|
}
|
|
|
|
p->major = p->major * 10 + ch - '0';
|
|
break;
|
|
case s_first_minor_digit:
|
|
if (ch < '0' || ch > '9') {
|
|
p->error = htparse_error_inval_ver;
|
|
return i + 1;
|
|
}
|
|
|
|
p->minor = ch - '0';
|
|
p->state = s_minor_digit;
|
|
break;
|
|
case s_minor_digit:
|
|
switch (ch) {
|
|
case ' ':
|
|
if (p->type == htp_type_request) {
|
|
p->state = s_spaces_after_digit;
|
|
} else if (p->type == htp_type_response) {
|
|
p->status = 0;
|
|
p->state = s_status;
|
|
}
|
|
|
|
break;
|
|
case CR:
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
default:
|
|
if (ch < '0' || ch > '9') {
|
|
p->error = htparse_error_inval_ver;
|
|
return i + 1;
|
|
}
|
|
|
|
p->minor = p->minor * 10 + ch - '0';
|
|
break;
|
|
} /* switch */
|
|
break;
|
|
case s_status:
|
|
/* http response status code */
|
|
if (ch == ' ') {
|
|
if (p->status) {
|
|
p->state = s_status_text;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (ch < '0' || ch > '9') {
|
|
p->error = htparse_error_status;
|
|
return i + 1;
|
|
}
|
|
|
|
p->status = p->status * 10 + ch - '0';
|
|
|
|
if (++p->status_count == 3) {
|
|
p->state = s_space_after_status;
|
|
}
|
|
|
|
break;
|
|
case s_space_after_status:
|
|
switch (ch) {
|
|
case ' ':
|
|
p->state = s_status_text;
|
|
break;
|
|
case CR:
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_generic;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_status_text:
|
|
switch (ch) {
|
|
case CR:
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case s_spaces_after_digit:
|
|
switch (ch) {
|
|
case ' ':
|
|
break;
|
|
case CR:
|
|
p->state = s_almost_done;
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_start;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_ver;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
|
|
case s_almost_done:
|
|
switch (ch) {
|
|
case LF:
|
|
if (p->type == htp_type_response && p->status >= 100 && p->status < 200) {
|
|
p->status = 0;
|
|
p->status_count = 0;
|
|
p->state = s_start;
|
|
break;
|
|
}
|
|
|
|
p->state = s_done;
|
|
res = hook_on_hdrs_begin_run(p, hooks);
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_reqline;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
case s_done:
|
|
switch (ch) {
|
|
case CR:
|
|
p->state = s_hdrline_almost_done;
|
|
break;
|
|
case LF:
|
|
return i + 1;
|
|
default:
|
|
goto hdrline_start;
|
|
}
|
|
break;
|
|
hdrline_start:
|
|
case s_hdrline_start:
|
|
htparse_log_debug("[%p] s_hdrline_start", p);
|
|
|
|
p->buf_idx = 0;
|
|
|
|
switch (ch) {
|
|
case CR:
|
|
p->state = s_hdrline_hdr_almost_done;
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_hdr_done;
|
|
break;
|
|
default:
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_hdrline_hdr_key;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
case s_hdrline_hdr_key:
|
|
htparse_log_debug("[%p] s_hdrline_hdr_key", p);
|
|
|
|
res = 0;
|
|
switch (ch) {
|
|
case ':':
|
|
res = hook_hdr_key_run(p, hooks, p->buf, p->buf_idx);
|
|
|
|
/* figure out if the value of this header is valueable */
|
|
p->heval = eval_hdr_val_none;
|
|
|
|
switch (p->buf_idx + 1) {
|
|
case 11:
|
|
if (!strcasecmp(p->buf, "connection")) {
|
|
p->heval = eval_hdr_val_connection;
|
|
}
|
|
break;
|
|
case 15:
|
|
if (!strcasecmp(p->buf, "content-length")) {
|
|
p->heval = eval_hdr_val_content_length;
|
|
}
|
|
break;
|
|
case 17:
|
|
if (!strcasecmp(p->buf, "proxy-connection")) {
|
|
p->heval = eval_hdr_val_proxy_connection;
|
|
}
|
|
break;
|
|
case 18:
|
|
if (!strcasecmp(p->buf, "transfer-encoding")) {
|
|
p->heval = eval_hdr_val_transfer_encoding;
|
|
}
|
|
break;
|
|
} /* switch */
|
|
|
|
p->buf_idx = 0;
|
|
p->state = s_hdrline_hdr_space_before_val;
|
|
|
|
break;
|
|
case CR:
|
|
p->state = s_hdrline_hdr_almost_done;
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_hdr_done;
|
|
break;
|
|
default:
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case s_hdrline_hdr_space_before_val:
|
|
htparse_log_debug("[%p] s_hdrline_hdr_space_before_val", p);
|
|
|
|
switch (ch) {
|
|
case ' ':
|
|
break;
|
|
case CR:
|
|
case LF:
|
|
/* empty header value, is this legal? */
|
|
p->error = htparse_error_inval_hdr;
|
|
return i + 1;
|
|
default:
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
p->state = s_hdrline_hdr_val;
|
|
break;
|
|
}
|
|
break;
|
|
case s_hdrline_hdr_val:
|
|
htparse_log_debug("[%p] s_hdrline_hdr_val", p);
|
|
err = 0;
|
|
res = 0;
|
|
|
|
switch (ch) {
|
|
case CR:
|
|
res = hook_hdr_val_run(p, hooks, p->buf, p->buf_idx);
|
|
|
|
switch (p->heval) {
|
|
case eval_hdr_val_none:
|
|
break;
|
|
case eval_hdr_val_content_length:
|
|
p->content_len = str_to_uint64(p->buf, p->buf_idx, &err);
|
|
|
|
if (err == 1) {
|
|
p->error = htparse_error_too_big;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case eval_hdr_val_connection:
|
|
switch (p->buf[0]) {
|
|
case 'K':
|
|
case 'k':
|
|
if (_str9cmp((p->buf + 1),
|
|
'e', 'e', 'p', '-', 'A', 'l', 'i', 'v', 'e')) {
|
|
p->flags |= parser_flag_connection_keep_alive;
|
|
}
|
|
break;
|
|
case 'c':
|
|
if (_str5cmp(p->buf, 'c', 'l', 'o', 's', 'e')) {
|
|
p->flags |= parser_flag_connection_close;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case eval_hdr_val_transfer_encoding:
|
|
if (_str7_cmp(p->buf, 'c', 'h', 'u', 'n', 'k', 'e', 'd', '\0')) {
|
|
p->flags |= parser_flag_chunked;
|
|
}
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
} /* switch */
|
|
|
|
p->state = s_hdrline_hdr_almost_done;
|
|
p->buf_idx = 0;
|
|
|
|
break;
|
|
case LF:
|
|
p->state = s_hdrline_hdr_done;
|
|
break;
|
|
default:
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
break;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case s_hdrline_hdr_almost_done:
|
|
htparse_log_debug("[%p] s_hdrline_hdr_almost_done", p);
|
|
|
|
res = 0;
|
|
switch (ch) {
|
|
case LF:
|
|
if (p->flags & parser_flag_trailing) {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
p->state = s_start;
|
|
break;
|
|
}
|
|
|
|
p->state = s_hdrline_hdr_done;
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_hdr;
|
|
return i + 1;
|
|
}
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case s_hdrline_hdr_done:
|
|
htparse_log_debug("[%p] s_hdrline_hdr_done", p);
|
|
|
|
switch (ch) {
|
|
case CR:
|
|
p->state = s_hdrline_almost_done;
|
|
break;
|
|
case LF:
|
|
/* got LFLF? is this valid? */
|
|
return i + 1;
|
|
default:
|
|
p->buf_idx = 0;
|
|
p->buf[p->buf_idx++] = ch;
|
|
p->buf[p->buf_idx] = '\0';
|
|
|
|
p->state = s_hdrline_hdr_key;
|
|
break;
|
|
}
|
|
break;
|
|
case s_hdrline_almost_done:
|
|
htparse_log_debug("[%p] s_hdrline_almost_done", p);
|
|
|
|
res = 0;
|
|
|
|
switch (ch) {
|
|
case LF:
|
|
p->buf_idx = 0;
|
|
htparse_log_debug("[%p] HERE", p);
|
|
|
|
res = hook_on_hdrs_complete_run(p, hooks);
|
|
|
|
if (!res) {
|
|
if (p->flags & parser_flag_trailing) {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
p->state = s_start;
|
|
} else if (p->flags & parser_flag_chunked) {
|
|
p->state = s_chunk_size_start;
|
|
} else if (p->content_len > 0) {
|
|
p->state = s_body_read;
|
|
} else if (p->content_len == 0) {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
p->state = s_start;
|
|
}
|
|
} else {
|
|
p->state = s_hdrline_done;
|
|
}
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
default:
|
|
p->error = htparse_error_inval_hdr;
|
|
return i + 1;
|
|
} /* switch */
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
case s_hdrline_done:
|
|
htparse_log_debug("[%p] s_hdrline_done", p);
|
|
res = 0;
|
|
if (p->flags & parser_flag_trailing) {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
p->state = s_start;
|
|
break;
|
|
} else if (p->flags & parser_flag_chunked) {
|
|
p->state = s_chunk_size_start;
|
|
i--;
|
|
} else if (p->content_len > 0) {
|
|
p->state = s_body_read;
|
|
i--;
|
|
} else if (p->content_len == 0) {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
p->state = s_start;
|
|
}
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
break;
|
|
|
|
case s_chunk_size_start:
|
|
c = unhex[(unsigned char)ch];
|
|
|
|
if (c == -1) {
|
|
p->error = htparse_error_inval_chunk_sz;
|
|
return i + 1;
|
|
}
|
|
|
|
p->content_len = c;
|
|
p->state = s_chunk_size;
|
|
break;
|
|
case s_chunk_size:
|
|
if (ch == CR) {
|
|
p->state = s_chunk_size_almost_done;
|
|
break;
|
|
}
|
|
|
|
c = unhex[(unsigned char)ch];
|
|
|
|
if (c == -1) {
|
|
p->error = htparse_error_inval_chunk_sz;
|
|
return i + 1;
|
|
}
|
|
|
|
p->content_len *= 16;
|
|
p->content_len += c;
|
|
break;
|
|
|
|
case s_chunk_size_almost_done:
|
|
res = 0;
|
|
|
|
if (ch != LF) {
|
|
p->error = htparse_error_inval_chunk_sz;
|
|
return i + 1;
|
|
}
|
|
|
|
if (p->content_len == 0) {
|
|
res = hook_on_chunks_complete_run(p, hooks);
|
|
|
|
p->flags |= parser_flag_trailing;
|
|
p->state = s_hdrline_start;
|
|
} else {
|
|
res = hook_on_new_chunk_run(p, hooks);
|
|
|
|
p->state = s_chunk_data;
|
|
}
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case s_chunk_data:
|
|
res = 0;
|
|
{
|
|
const char * pp = &data[i];
|
|
const char * pe = (const char *)(data + len);
|
|
size_t to_read = _MIN_READ((uint64_t)(pe - pp),
|
|
p->content_len);
|
|
|
|
if (to_read > 0) {
|
|
res = hook_body_run(p, hooks, pp, to_read);
|
|
|
|
i += to_read - 1;
|
|
}
|
|
|
|
if (to_read == p->content_len) {
|
|
p->state = s_chunk_data_almost_done;
|
|
}
|
|
|
|
p->content_len -= to_read;
|
|
}
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case s_chunk_data_almost_done:
|
|
if (ch != CR) {
|
|
p->error = htparse_error_inval_chunk;
|
|
return i + 1;
|
|
}
|
|
|
|
p->state = s_chunk_data_done;
|
|
break;
|
|
|
|
case s_chunk_data_done:
|
|
if (ch != LF) {
|
|
p->error = htparse_error_inval_chunk;
|
|
return i + 1;
|
|
}
|
|
|
|
p->state = s_chunk_size_start;
|
|
|
|
if (hook_on_chunk_complete_run(p, hooks)) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
case s_body_read:
|
|
res = 0;
|
|
|
|
{
|
|
const char * pp = &data[i];
|
|
const char * pe = (const char *)(data + len);
|
|
size_t to_read = _MIN_READ((uint64_t)(pe - pp),
|
|
p->content_len);
|
|
|
|
htparse_log_debug("[%p] s_body_read %zu", p, to_read);
|
|
|
|
if (to_read > 0) {
|
|
res = hook_body_run(p, hooks, pp, to_read);
|
|
|
|
i += to_read - 1;
|
|
p->content_len -= to_read;
|
|
|
|
if (p->content_len == 0) {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
|
|
p->state = s_start;
|
|
}
|
|
} else {
|
|
res = hook_on_msg_complete_run(p, hooks);
|
|
p->state = s_start;
|
|
}
|
|
}
|
|
|
|
if (res) {
|
|
p->error = htparse_error_user;
|
|
return i + 1;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
htparse_log_debug("[%p] This is a silly state....", p);
|
|
p->error = htparse_error_inval_state;
|
|
return i + 1;
|
|
} /* switch */
|
|
}
|
|
|
|
return i;
|
|
} /* htparser_run */
|
|
|