xref: /unit/src/nxt_http_parse.c (revision 622)
116Svbart@nginx.com 
216Svbart@nginx.com /*
316Svbart@nginx.com  * Copyright (C) NGINX, Inc.
416Svbart@nginx.com  * Copyright (C) Valentin V. Bartenev
516Svbart@nginx.com  */
616Svbart@nginx.com 
716Svbart@nginx.com #include <nxt_main.h>
816Svbart@nginx.com 
916Svbart@nginx.com 
1016Svbart@nginx.com static nxt_int_t nxt_http_parse_unusual_target(nxt_http_request_parse_t *rp,
1116Svbart@nginx.com     u_char **pos, u_char *end);
1216Svbart@nginx.com static nxt_int_t nxt_http_parse_request_line(nxt_http_request_parse_t *rp,
1316Svbart@nginx.com     u_char **pos, u_char *end);
1416Svbart@nginx.com static nxt_int_t nxt_http_parse_field_name(nxt_http_request_parse_t *rp,
1516Svbart@nginx.com     u_char **pos, u_char *end);
1616Svbart@nginx.com static nxt_int_t nxt_http_parse_field_value(nxt_http_request_parse_t *rp,
1716Svbart@nginx.com     u_char **pos, u_char *end);
1816Svbart@nginx.com static u_char *nxt_http_lookup_field_end(u_char *p, u_char *end);
1916Svbart@nginx.com static nxt_int_t nxt_http_parse_field_end(nxt_http_request_parse_t *rp,
2016Svbart@nginx.com     u_char **pos, u_char *end);
2116Svbart@nginx.com 
22417Svbart@nginx.com static nxt_int_t nxt_http_parse_complex_target(nxt_http_request_parse_t *rp);
23417Svbart@nginx.com 
24417Svbart@nginx.com static nxt_int_t nxt_http_field_hash_test(nxt_lvlhsh_query_t *lhq, void *data);
25417Svbart@nginx.com static void *nxt_http_field_hash_alloc(void *pool, size_t size);
26417Svbart@nginx.com static void nxt_http_field_hash_free(void *pool, void *p);
27417Svbart@nginx.com 
28417Svbart@nginx.com static nxt_int_t nxt_http_field_hash_collision(nxt_lvlhsh_query_t *lhq,
29417Svbart@nginx.com     void *data);
3016Svbart@nginx.com 
31417Svbart@nginx.com 
32611Svbart@nginx.com #define NXT_HTTP_MAX_FIELD_NAME         0xFF
33417Svbart@nginx.com #define NXT_HTTP_MAX_FIELD_VALUE        NXT_INT32_T_MAX
34417Svbart@nginx.com 
35417Svbart@nginx.com #define NXT_HTTP_FIELD_LVLHSH_SHIFT     5
36417Svbart@nginx.com 
37417Svbart@nginx.com #define NXT_HTTP_FIELD_HASH_INIT        159406
38417Svbart@nginx.com #define nxt_http_field_hash_char(h, c)  (((h) << 4) + (h) + (c))
39417Svbart@nginx.com #define nxt_http_field_hash_end(h)      (((h) >> 16) ^ (h))
40112Smax.romanov@nginx.com 
4116Svbart@nginx.com 
4216Svbart@nginx.com typedef enum {
4316Svbart@nginx.com     NXT_HTTP_TARGET_SPACE = 1,   /* \s  */
4416Svbart@nginx.com     NXT_HTTP_TARGET_HASH,        /*  #  */
4516Svbart@nginx.com     NXT_HTTP_TARGET_AGAIN,
4616Svbart@nginx.com     NXT_HTTP_TARGET_BAD,         /* \0\r\n */
4716Svbart@nginx.com 
4816Svbart@nginx.com     /* traps below are used for extended check only */
4916Svbart@nginx.com 
5016Svbart@nginx.com     NXT_HTTP_TARGET_SLASH = 5,   /*  /  */
5116Svbart@nginx.com     NXT_HTTP_TARGET_DOT,         /*  .  */
5216Svbart@nginx.com     NXT_HTTP_TARGET_ARGS_MARK,   /*  ?  */
5316Svbart@nginx.com     NXT_HTTP_TARGET_QUOTE_MARK,  /*  %  */
5416Svbart@nginx.com     NXT_HTTP_TARGET_PLUS,        /*  +  */
5516Svbart@nginx.com } nxt_http_target_traps_e;
5616Svbart@nginx.com 
5716Svbart@nginx.com 
5816Svbart@nginx.com static const uint8_t  nxt_http_target_chars[256] nxt_aligned(64) = {
5916Svbart@nginx.com     /* \0                               \n        \r       */
6016Svbart@nginx.com         4, 0, 0, 0,  0, 0, 0, 0,   0, 0, 4, 0,  0, 4, 0, 0,
6116Svbart@nginx.com         0, 0, 0, 0,  0, 0, 0, 0,   0, 0, 0, 0,  0, 0, 0, 0,
6252Svbart@nginx.com 
6352Svbart@nginx.com     /* \s  !  "  #   $  %  &  '    (  )  *  +   ,  -  .  / */
6416Svbart@nginx.com         1, 0, 0, 2,  0, 8, 0, 0,   0, 0, 0, 9,  0, 0, 6, 5,
6552Svbart@nginx.com 
6652Svbart@nginx.com     /*  0  1  2  3   4  5  6  7    8  9  :  ;   <  =  >  ? */
6716Svbart@nginx.com         0, 0, 0, 0,  0, 0, 0, 0,   0, 0, 0, 0,  0, 0, 0, 7,
6816Svbart@nginx.com };
6916Svbart@nginx.com 
7016Svbart@nginx.com 
7116Svbart@nginx.com nxt_inline nxt_http_target_traps_e
7216Svbart@nginx.com nxt_http_parse_target(u_char **pos, u_char *end)
7316Svbart@nginx.com {
7416Svbart@nginx.com     u_char      *p;
7516Svbart@nginx.com     nxt_uint_t  trap;
7616Svbart@nginx.com 
7716Svbart@nginx.com     p = *pos;
7816Svbart@nginx.com 
79409Svbart@nginx.com     while (nxt_fast_path(end - p >= 10)) {
8016Svbart@nginx.com 
81409Svbart@nginx.com #define nxt_target_test_char(ch)                                              \
82409Svbart@nginx.com                                                                               \
83409Svbart@nginx.com         trap = nxt_http_target_chars[ch];                                     \
8416Svbart@nginx.com                                                                               \
85409Svbart@nginx.com         if (nxt_slow_path(trap != 0)) {                                       \
86409Svbart@nginx.com             *pos = &(ch);                                                     \
87409Svbart@nginx.com             return trap;                                                      \
8816Svbart@nginx.com         }
8916Svbart@nginx.com 
90409Svbart@nginx.com /* enddef */
91409Svbart@nginx.com 
92409Svbart@nginx.com         nxt_target_test_char(p[0]);
93409Svbart@nginx.com         nxt_target_test_char(p[1]);
94409Svbart@nginx.com         nxt_target_test_char(p[2]);
95409Svbart@nginx.com         nxt_target_test_char(p[3]);
9616Svbart@nginx.com 
97409Svbart@nginx.com         nxt_target_test_char(p[4]);
98409Svbart@nginx.com         nxt_target_test_char(p[5]);
99409Svbart@nginx.com         nxt_target_test_char(p[6]);
100409Svbart@nginx.com         nxt_target_test_char(p[7]);
10116Svbart@nginx.com 
102409Svbart@nginx.com         nxt_target_test_char(p[8]);
103409Svbart@nginx.com         nxt_target_test_char(p[9]);
10416Svbart@nginx.com 
105409Svbart@nginx.com         p += 10;
10616Svbart@nginx.com     }
10716Svbart@nginx.com 
108410Svbart@nginx.com     while (p != end) {
109410Svbart@nginx.com         nxt_target_test_char(*p); p++;
110410Svbart@nginx.com     }
111410Svbart@nginx.com 
112409Svbart@nginx.com     return NXT_HTTP_TARGET_AGAIN;
11316Svbart@nginx.com }
11416Svbart@nginx.com 
11516Svbart@nginx.com 
11616Svbart@nginx.com nxt_int_t
117417Svbart@nginx.com nxt_http_parse_request_init(nxt_http_request_parse_t *rp, nxt_mp_t *mp)
118417Svbart@nginx.com {
119417Svbart@nginx.com     rp->mem_pool = mp;
120417Svbart@nginx.com 
121417Svbart@nginx.com     rp->fields = nxt_list_create(mp, 8, sizeof(nxt_http_field_t));
122417Svbart@nginx.com     if (nxt_slow_path(rp->fields == NULL)){
123417Svbart@nginx.com         return NXT_ERROR;
124417Svbart@nginx.com     }
125417Svbart@nginx.com 
126417Svbart@nginx.com     rp->field_hash = NXT_HTTP_FIELD_HASH_INIT;
127417Svbart@nginx.com 
128417Svbart@nginx.com     return NXT_OK;
129417Svbart@nginx.com }
130417Svbart@nginx.com 
131417Svbart@nginx.com 
132417Svbart@nginx.com nxt_int_t
13316Svbart@nginx.com nxt_http_parse_request(nxt_http_request_parse_t *rp, nxt_buf_mem_t *b)
13416Svbart@nginx.com {
13516Svbart@nginx.com     nxt_int_t  rc;
13616Svbart@nginx.com 
13716Svbart@nginx.com     if (rp->handler == NULL) {
13816Svbart@nginx.com         rp->handler = &nxt_http_parse_request_line;
13916Svbart@nginx.com     }
14016Svbart@nginx.com 
14116Svbart@nginx.com     do {
14216Svbart@nginx.com         rc = rp->handler(rp, &b->pos, b->free);
14316Svbart@nginx.com     } while (rc == NXT_OK);
14416Svbart@nginx.com 
14516Svbart@nginx.com     return rc;
14616Svbart@nginx.com }
14716Svbart@nginx.com 
14816Svbart@nginx.com 
149422Svbart@nginx.com nxt_int_t
150422Svbart@nginx.com nxt_http_parse_fields(nxt_http_request_parse_t *rp, nxt_buf_mem_t *b)
151422Svbart@nginx.com {
152422Svbart@nginx.com     nxt_int_t  rc;
153422Svbart@nginx.com 
154422Svbart@nginx.com     if (rp->handler == NULL) {
155422Svbart@nginx.com         rp->handler = &nxt_http_parse_field_name;
156422Svbart@nginx.com     }
157422Svbart@nginx.com 
158422Svbart@nginx.com     do {
159422Svbart@nginx.com         rc = rp->handler(rp, &b->pos, b->free);
160422Svbart@nginx.com     } while (rc == NXT_OK);
161422Svbart@nginx.com 
162422Svbart@nginx.com     return rc;
163422Svbart@nginx.com }
164422Svbart@nginx.com 
165422Svbart@nginx.com 
16616Svbart@nginx.com static nxt_int_t
16716Svbart@nginx.com nxt_http_parse_request_line(nxt_http_request_parse_t *rp, u_char **pos,
16816Svbart@nginx.com     u_char *end)
16916Svbart@nginx.com {
17016Svbart@nginx.com     u_char                   *p, ch, *after_slash;
17116Svbart@nginx.com     nxt_int_t                rc;
172481Svbart@nginx.com     nxt_http_ver_t           ver;
17316Svbart@nginx.com     nxt_http_target_traps_e  trap;
17416Svbart@nginx.com 
17516Svbart@nginx.com     static const nxt_http_ver_t  http11 = { "HTTP/1.1" };
17616Svbart@nginx.com     static const nxt_http_ver_t  http10 = { "HTTP/1.0" };
17716Svbart@nginx.com 
17816Svbart@nginx.com     p = *pos;
17916Svbart@nginx.com 
18016Svbart@nginx.com     rp->method.start = p;
18116Svbart@nginx.com 
182409Svbart@nginx.com     for ( ;; ) {
183409Svbart@nginx.com 
184409Svbart@nginx.com         while (nxt_fast_path(end - p >= 8)) {
18516Svbart@nginx.com 
186409Svbart@nginx.com #define nxt_method_test_char(ch)                                              \
187409Svbart@nginx.com                                                                               \
188409Svbart@nginx.com             if (nxt_slow_path((ch) < 'A' || (ch) > 'Z')) {                    \
189409Svbart@nginx.com                 p = &(ch);                                                    \
190409Svbart@nginx.com                 goto method_unusual_char;                                     \
19116Svbart@nginx.com             }
19216Svbart@nginx.com 
193409Svbart@nginx.com /* enddef */
194409Svbart@nginx.com 
195409Svbart@nginx.com             nxt_method_test_char(p[0]);
196409Svbart@nginx.com             nxt_method_test_char(p[1]);
197409Svbart@nginx.com             nxt_method_test_char(p[2]);
198409Svbart@nginx.com             nxt_method_test_char(p[3]);
19916Svbart@nginx.com 
200409Svbart@nginx.com             nxt_method_test_char(p[4]);
201409Svbart@nginx.com             nxt_method_test_char(p[5]);
202409Svbart@nginx.com             nxt_method_test_char(p[6]);
203409Svbart@nginx.com             nxt_method_test_char(p[7]);
20416Svbart@nginx.com 
205409Svbart@nginx.com             p += 8;
206409Svbart@nginx.com         }
20716Svbart@nginx.com 
208410Svbart@nginx.com         while (p != end) {
209410Svbart@nginx.com             nxt_method_test_char(*p); p++;
210410Svbart@nginx.com         }
211410Svbart@nginx.com 
212409Svbart@nginx.com         return NXT_AGAIN;
213409Svbart@nginx.com 
214409Svbart@nginx.com     method_unusual_char:
215409Svbart@nginx.com 
216409Svbart@nginx.com         ch = *p;
21716Svbart@nginx.com 
21816Svbart@nginx.com         if (nxt_fast_path(ch == ' ')) {
21916Svbart@nginx.com             rp->method.length = p - rp->method.start;
22016Svbart@nginx.com             break;
22116Svbart@nginx.com         }
22216Svbart@nginx.com 
22316Svbart@nginx.com         if (ch == '_' || ch == '-') {
224409Svbart@nginx.com             p++;
22516Svbart@nginx.com             continue;
22616Svbart@nginx.com         }
22716Svbart@nginx.com 
22816Svbart@nginx.com         if (rp->method.start == p && (ch == NXT_CR || ch == NXT_LF)) {
22916Svbart@nginx.com             rp->method.start++;
230409Svbart@nginx.com             p++;
23116Svbart@nginx.com             continue;
23216Svbart@nginx.com         }
23316Svbart@nginx.com 
234480Svbart@nginx.com         return NXT_HTTP_PARSE_INVALID;
23516Svbart@nginx.com     }
23616Svbart@nginx.com 
23716Svbart@nginx.com     p++;
23816Svbart@nginx.com 
23916Svbart@nginx.com     if (nxt_slow_path(p == end)) {
24016Svbart@nginx.com         return NXT_AGAIN;
24116Svbart@nginx.com     }
24216Svbart@nginx.com 
24316Svbart@nginx.com     /* target */
24416Svbart@nginx.com 
24516Svbart@nginx.com     ch = *p;
24616Svbart@nginx.com 
24716Svbart@nginx.com     if (nxt_slow_path(ch != '/')) {
24816Svbart@nginx.com         rc = nxt_http_parse_unusual_target(rp, &p, end);
24916Svbart@nginx.com 
25016Svbart@nginx.com         if (nxt_slow_path(rc != NXT_OK)) {
25116Svbart@nginx.com             return rc;
25216Svbart@nginx.com         }
25316Svbart@nginx.com     }
25416Svbart@nginx.com 
25516Svbart@nginx.com     rp->target_start = p;
25616Svbart@nginx.com 
25716Svbart@nginx.com     after_slash = p + 1;
25816Svbart@nginx.com 
25916Svbart@nginx.com     for ( ;; ) {
26016Svbart@nginx.com         p++;
26116Svbart@nginx.com 
26216Svbart@nginx.com         trap = nxt_http_parse_target(&p, end);
26316Svbart@nginx.com 
26416Svbart@nginx.com         switch (trap) {
26516Svbart@nginx.com         case NXT_HTTP_TARGET_SLASH:
26616Svbart@nginx.com             if (nxt_slow_path(after_slash == p)) {
26716Svbart@nginx.com                 rp->complex_target = 1;
26816Svbart@nginx.com                 goto rest_of_target;
26916Svbart@nginx.com             }
27016Svbart@nginx.com 
27116Svbart@nginx.com             after_slash = p + 1;
27216Svbart@nginx.com 
27316Svbart@nginx.com             rp->exten_start = NULL;
27416Svbart@nginx.com             continue;
27516Svbart@nginx.com 
27616Svbart@nginx.com         case NXT_HTTP_TARGET_DOT:
27716Svbart@nginx.com             if (nxt_slow_path(after_slash == p)) {
27816Svbart@nginx.com                 rp->complex_target = 1;
27916Svbart@nginx.com                 goto rest_of_target;
28016Svbart@nginx.com             }
28116Svbart@nginx.com 
28216Svbart@nginx.com             rp->exten_start = p + 1;
28316Svbart@nginx.com             continue;
28416Svbart@nginx.com 
28516Svbart@nginx.com         case NXT_HTTP_TARGET_ARGS_MARK:
28616Svbart@nginx.com             rp->args_start = p + 1;
28716Svbart@nginx.com             goto rest_of_target;
28816Svbart@nginx.com 
28916Svbart@nginx.com         case NXT_HTTP_TARGET_SPACE:
29016Svbart@nginx.com             rp->target_end = p;
29116Svbart@nginx.com             goto space_after_target;
29216Svbart@nginx.com 
29316Svbart@nginx.com         case NXT_HTTP_TARGET_QUOTE_MARK:
29416Svbart@nginx.com             rp->quoted_target = 1;
29516Svbart@nginx.com             goto rest_of_target;
29616Svbart@nginx.com 
29716Svbart@nginx.com         case NXT_HTTP_TARGET_PLUS:
29816Svbart@nginx.com             rp->plus_in_target = 1;
29916Svbart@nginx.com             continue;
30016Svbart@nginx.com 
30116Svbart@nginx.com         case NXT_HTTP_TARGET_HASH:
30216Svbart@nginx.com             rp->complex_target = 1;
30316Svbart@nginx.com             goto rest_of_target;
30416Svbart@nginx.com 
30516Svbart@nginx.com         case NXT_HTTP_TARGET_AGAIN:
306621Svbart@nginx.com             rp->target_end = p;
30716Svbart@nginx.com             return NXT_AGAIN;
30816Svbart@nginx.com 
30916Svbart@nginx.com         case NXT_HTTP_TARGET_BAD:
310621Svbart@nginx.com             rp->target_end = p;
311480Svbart@nginx.com             return NXT_HTTP_PARSE_INVALID;
31216Svbart@nginx.com         }
31316Svbart@nginx.com 
31416Svbart@nginx.com         nxt_unreachable();
31516Svbart@nginx.com     }
31616Svbart@nginx.com 
31716Svbart@nginx.com rest_of_target:
31816Svbart@nginx.com 
31916Svbart@nginx.com     for ( ;; ) {
32016Svbart@nginx.com         p++;
32116Svbart@nginx.com 
32219Svbart@nginx.com         trap = nxt_http_parse_target(&p, end);
32316Svbart@nginx.com 
32416Svbart@nginx.com         switch (trap) {
32516Svbart@nginx.com         case NXT_HTTP_TARGET_SPACE:
32616Svbart@nginx.com             rp->target_end = p;
32716Svbart@nginx.com             goto space_after_target;
32816Svbart@nginx.com 
32916Svbart@nginx.com         case NXT_HTTP_TARGET_HASH:
33016Svbart@nginx.com             rp->complex_target = 1;
33116Svbart@nginx.com             continue;
33216Svbart@nginx.com 
33316Svbart@nginx.com         case NXT_HTTP_TARGET_AGAIN:
334621Svbart@nginx.com             rp->target_end = p;
33516Svbart@nginx.com             return NXT_AGAIN;
33616Svbart@nginx.com 
33716Svbart@nginx.com         case NXT_HTTP_TARGET_BAD:
338621Svbart@nginx.com             rp->target_end = p;
339480Svbart@nginx.com             return NXT_HTTP_PARSE_INVALID;
34016Svbart@nginx.com 
34116Svbart@nginx.com         default:
34216Svbart@nginx.com             continue;
34316Svbart@nginx.com         }
34416Svbart@nginx.com 
34516Svbart@nginx.com         nxt_unreachable();
34616Svbart@nginx.com     }
34716Svbart@nginx.com 
34816Svbart@nginx.com space_after_target:
34916Svbart@nginx.com 
35016Svbart@nginx.com     if (nxt_slow_path(end - p < 10)) {
351410Svbart@nginx.com 
352410Svbart@nginx.com         do {
353410Svbart@nginx.com             p++;
354410Svbart@nginx.com 
355410Svbart@nginx.com             if (p == end) {
356410Svbart@nginx.com                 return NXT_AGAIN;
357410Svbart@nginx.com             }
358410Svbart@nginx.com 
359410Svbart@nginx.com         } while (*p == ' ');
360410Svbart@nginx.com 
361410Svbart@nginx.com         if (nxt_memcmp(p, "HTTP/", nxt_min(end - p, 5)) == 0) {
362410Svbart@nginx.com 
363410Svbart@nginx.com             switch (end - p) {
364410Svbart@nginx.com             case 8:
365410Svbart@nginx.com                 if (p[7] < '0' || p[7] > '9') {
366410Svbart@nginx.com                     break;
367410Svbart@nginx.com                 }
368410Svbart@nginx.com                 /* Fall through. */
369410Svbart@nginx.com             case 7:
370410Svbart@nginx.com                 if (p[6] != '.') {
371410Svbart@nginx.com                     break;
372410Svbart@nginx.com                 }
373410Svbart@nginx.com                 /* Fall through. */
374410Svbart@nginx.com             case 6:
375410Svbart@nginx.com                 if (p[5] < '0' || p[5] > '9') {
376410Svbart@nginx.com                     break;
377410Svbart@nginx.com                 }
378410Svbart@nginx.com                 /* Fall through. */
379410Svbart@nginx.com             default:
380410Svbart@nginx.com                 return NXT_AGAIN;
381410Svbart@nginx.com             }
382410Svbart@nginx.com         }
383410Svbart@nginx.com 
384410Svbart@nginx.com         rp->space_in_target = 1;
385410Svbart@nginx.com         goto rest_of_target;
38616Svbart@nginx.com     }
38716Svbart@nginx.com 
38816Svbart@nginx.com     /* " HTTP/1.1\r\n" or " HTTP/1.1\n" */
38916Svbart@nginx.com 
390482Svbart@nginx.com     if (nxt_slow_path(p[9] != '\r' && p[9] != '\n')) {
391482Svbart@nginx.com 
392482Svbart@nginx.com         if (p[1] == ' ') {
393482Svbart@nginx.com             /* surplus space after tartet */
394482Svbart@nginx.com             p++;
395482Svbart@nginx.com             goto space_after_target;
396482Svbart@nginx.com         }
397482Svbart@nginx.com 
398482Svbart@nginx.com         rp->space_in_target = 1;
399482Svbart@nginx.com         goto rest_of_target;
400482Svbart@nginx.com     }
401482Svbart@nginx.com 
402481Svbart@nginx.com     nxt_memcpy(ver.str, &p[1], 8);
40316Svbart@nginx.com 
404482Svbart@nginx.com     if (nxt_fast_path(ver.ui64 == http11.ui64
405482Svbart@nginx.com                       || ver.ui64 == http10.ui64
406482Svbart@nginx.com                       || (nxt_memcmp(ver.str, "HTTP/1.", 7) == 0
407482Svbart@nginx.com                           && ver.s.minor >= '0' && ver.s.minor <= '9')))
40816Svbart@nginx.com     {
409481Svbart@nginx.com         rp->version.ui64 = ver.ui64;
41016Svbart@nginx.com 
41116Svbart@nginx.com         if (nxt_fast_path(p[9] == '\r')) {
41216Svbart@nginx.com             p += 10;
41316Svbart@nginx.com 
41416Svbart@nginx.com             if (nxt_slow_path(p == end)) {
41516Svbart@nginx.com                 return NXT_AGAIN;
41616Svbart@nginx.com             }
41716Svbart@nginx.com 
41816Svbart@nginx.com             if (nxt_slow_path(*p != '\n')) {
419480Svbart@nginx.com                 return NXT_HTTP_PARSE_INVALID;
42016Svbart@nginx.com             }
42116Svbart@nginx.com 
42216Svbart@nginx.com             *pos = p + 1;
423112Smax.romanov@nginx.com 
424112Smax.romanov@nginx.com         } else {
425112Smax.romanov@nginx.com             *pos = p + 10;
426112Smax.romanov@nginx.com         }
427112Smax.romanov@nginx.com 
428112Smax.romanov@nginx.com         if (rp->complex_target != 0 || rp->quoted_target != 0) {
429112Smax.romanov@nginx.com             rc = nxt_http_parse_complex_target(rp);
430112Smax.romanov@nginx.com 
431112Smax.romanov@nginx.com             if (nxt_slow_path(rc != NXT_OK)) {
432112Smax.romanov@nginx.com                 return rc;
433112Smax.romanov@nginx.com             }
434112Smax.romanov@nginx.com 
43516Svbart@nginx.com             return nxt_http_parse_field_name(rp, pos, end);
43616Svbart@nginx.com         }
43716Svbart@nginx.com 
438112Smax.romanov@nginx.com         rp->path.start = rp->target_start;
439112Smax.romanov@nginx.com 
440112Smax.romanov@nginx.com         if (rp->args_start != NULL) {
441112Smax.romanov@nginx.com             rp->path.length = rp->args_start - rp->target_start - 1;
442112Smax.romanov@nginx.com 
443112Smax.romanov@nginx.com             rp->args.start = rp->args_start;
444112Smax.romanov@nginx.com             rp->args.length = rp->target_end - rp->args_start;
445112Smax.romanov@nginx.com 
446112Smax.romanov@nginx.com         } else {
447112Smax.romanov@nginx.com             rp->path.length = rp->target_end - rp->target_start;
448112Smax.romanov@nginx.com         }
449112Smax.romanov@nginx.com 
450112Smax.romanov@nginx.com         if (rp->exten_start) {
451613Svbart@nginx.com             rp->exten.length = rp->path.start + rp->path.length
452613Svbart@nginx.com                                - rp->exten_start;
453112Smax.romanov@nginx.com             rp->exten.start = rp->exten_start;
454112Smax.romanov@nginx.com         }
455112Smax.romanov@nginx.com 
45616Svbart@nginx.com         return nxt_http_parse_field_name(rp, pos, end);
45716Svbart@nginx.com     }
45816Svbart@nginx.com 
459482Svbart@nginx.com     if (nxt_memcmp(ver.s.prefix, "HTTP/", 5) == 0
460482Svbart@nginx.com         && ver.s.major >= '0' && ver.s.major <= '9'
461482Svbart@nginx.com         && ver.s.point == '.'
462482Svbart@nginx.com         && ver.s.minor >= '0' && ver.s.minor <= '9')
463482Svbart@nginx.com     {
464*622Svbart@nginx.com         rp->version.ui64 = ver.ui64;
465482Svbart@nginx.com         return NXT_HTTP_PARSE_UNSUPPORTED_VERSION;
46616Svbart@nginx.com     }
46716Svbart@nginx.com 
468482Svbart@nginx.com     return NXT_HTTP_PARSE_INVALID;
46916Svbart@nginx.com }
47016Svbart@nginx.com 
47116Svbart@nginx.com 
47216Svbart@nginx.com static nxt_int_t
47316Svbart@nginx.com nxt_http_parse_unusual_target(nxt_http_request_parse_t *rp, u_char **pos,
47416Svbart@nginx.com     u_char *end)
47516Svbart@nginx.com {
47616Svbart@nginx.com     u_char  *p, ch;
47716Svbart@nginx.com 
47816Svbart@nginx.com     p = *pos;
47916Svbart@nginx.com 
48016Svbart@nginx.com     ch = *p;
48116Svbart@nginx.com 
48216Svbart@nginx.com     if (ch == ' ') {
48316Svbart@nginx.com         /* skip surplus spaces before target */
48416Svbart@nginx.com 
48516Svbart@nginx.com         do {
48616Svbart@nginx.com             p++;
48716Svbart@nginx.com 
48816Svbart@nginx.com             if (nxt_slow_path(p == end)) {
48916Svbart@nginx.com                 return NXT_AGAIN;
49016Svbart@nginx.com             }
49116Svbart@nginx.com 
49216Svbart@nginx.com             ch = *p;
49316Svbart@nginx.com 
49416Svbart@nginx.com         } while (ch == ' ');
49516Svbart@nginx.com 
49616Svbart@nginx.com         if (ch == '/') {
49716Svbart@nginx.com             *pos = p;
49816Svbart@nginx.com             return NXT_OK;
49916Svbart@nginx.com         }
50016Svbart@nginx.com     }
50116Svbart@nginx.com 
50216Svbart@nginx.com     /* absolute path or '*' */
50316Svbart@nginx.com 
50416Svbart@nginx.com     /* TODO */
50516Svbart@nginx.com 
506480Svbart@nginx.com     return NXT_HTTP_PARSE_INVALID;
50716Svbart@nginx.com }
50816Svbart@nginx.com 
50916Svbart@nginx.com 
51016Svbart@nginx.com static nxt_int_t
51116Svbart@nginx.com nxt_http_parse_field_name(nxt_http_request_parse_t *rp, u_char **pos,
51216Svbart@nginx.com     u_char *end)
51316Svbart@nginx.com {
514417Svbart@nginx.com     u_char    *p, c;
515417Svbart@nginx.com     size_t    len;
516417Svbart@nginx.com     uint32_t  hash;
51716Svbart@nginx.com 
51816Svbart@nginx.com     static const u_char  normal[256]  nxt_aligned(64) =
51916Svbart@nginx.com         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
52016Svbart@nginx.com         "\0\0\0\0\0\0\0\0\0\0\0\0\0-\0\0" "0123456789\0\0\0\0\0\0"
52116Svbart@nginx.com 
52216Svbart@nginx.com         /* These 64 bytes should reside in one cache line. */
523454Svbart@nginx.com         "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0_"
52416Svbart@nginx.com         "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
52516Svbart@nginx.com 
52616Svbart@nginx.com         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
52716Svbart@nginx.com         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
52816Svbart@nginx.com         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
52916Svbart@nginx.com         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
53016Svbart@nginx.com 
531417Svbart@nginx.com     p = *pos + rp->field_name.length;
532417Svbart@nginx.com     hash = rp->field_hash;
53316Svbart@nginx.com 
534417Svbart@nginx.com     while (nxt_fast_path(end - p >= 8)) {
535409Svbart@nginx.com 
536417Svbart@nginx.com #define nxt_field_name_test_char(ch)                                          \
537409Svbart@nginx.com                                                                               \
53819Svbart@nginx.com         c = normal[ch];                                                       \
53919Svbart@nginx.com                                                                               \
54019Svbart@nginx.com         if (nxt_slow_path(c == '\0')) {                                       \
541417Svbart@nginx.com             p = &(ch);                                                        \
54219Svbart@nginx.com             goto name_end;                                                    \
54319Svbart@nginx.com         }                                                                     \
54419Svbart@nginx.com                                                                               \
545417Svbart@nginx.com         hash = nxt_http_field_hash_char(hash, c);
546409Svbart@nginx.com 
547409Svbart@nginx.com /* enddef */
54816Svbart@nginx.com 
549417Svbart@nginx.com         nxt_field_name_test_char(p[0]);
550417Svbart@nginx.com         nxt_field_name_test_char(p[1]);
551417Svbart@nginx.com         nxt_field_name_test_char(p[2]);
552417Svbart@nginx.com         nxt_field_name_test_char(p[3]);
55316Svbart@nginx.com 
554417Svbart@nginx.com         nxt_field_name_test_char(p[4]);
555417Svbart@nginx.com         nxt_field_name_test_char(p[5]);
556417Svbart@nginx.com         nxt_field_name_test_char(p[6]);
557417Svbart@nginx.com         nxt_field_name_test_char(p[7]);
558417Svbart@nginx.com 
559417Svbart@nginx.com         p += 8;
56019Svbart@nginx.com     }
56116Svbart@nginx.com 
562417Svbart@nginx.com     while (nxt_fast_path(p != end)) {
563417Svbart@nginx.com         nxt_field_name_test_char(*p); p++;
56419Svbart@nginx.com     }
56516Svbart@nginx.com 
566417Svbart@nginx.com     len = p - *pos;
567417Svbart@nginx.com 
568417Svbart@nginx.com     if (nxt_slow_path(len > NXT_HTTP_MAX_FIELD_NAME)) {
569480Svbart@nginx.com         return NXT_HTTP_PARSE_TOO_LARGE_FIELD;
570417Svbart@nginx.com     }
571417Svbart@nginx.com 
572417Svbart@nginx.com     rp->field_hash = hash;
573417Svbart@nginx.com     rp->field_name.length = len;
574417Svbart@nginx.com 
57516Svbart@nginx.com     rp->handler = &nxt_http_parse_field_name;
57616Svbart@nginx.com 
57716Svbart@nginx.com     return NXT_AGAIN;
57819Svbart@nginx.com 
57919Svbart@nginx.com name_end:
58019Svbart@nginx.com 
581417Svbart@nginx.com     if (nxt_fast_path(*p == ':')) {
582417Svbart@nginx.com         if (nxt_slow_path(p == *pos)) {
583480Svbart@nginx.com             return NXT_HTTP_PARSE_INVALID;
58419Svbart@nginx.com         }
58519Svbart@nginx.com 
586417Svbart@nginx.com         len = p - *pos;
587417Svbart@nginx.com 
588417Svbart@nginx.com         if (nxt_slow_path(len > NXT_HTTP_MAX_FIELD_NAME)) {
589480Svbart@nginx.com             return NXT_HTTP_PARSE_TOO_LARGE_FIELD;
590417Svbart@nginx.com         }
59119Svbart@nginx.com 
592417Svbart@nginx.com         rp->field_hash = hash;
593417Svbart@nginx.com 
594417Svbart@nginx.com         rp->field_name.length = len;
595417Svbart@nginx.com         rp->field_name.start = *pos;
596417Svbart@nginx.com 
597417Svbart@nginx.com         *pos = p + 1;
59819Svbart@nginx.com 
59919Svbart@nginx.com         return nxt_http_parse_field_value(rp, pos, end);
60019Svbart@nginx.com     }
60119Svbart@nginx.com 
602417Svbart@nginx.com     if (nxt_slow_path(p != *pos)) {
603480Svbart@nginx.com         return NXT_HTTP_PARSE_INVALID;
60459Svbart@nginx.com     }
60519Svbart@nginx.com 
60619Svbart@nginx.com     return nxt_http_parse_field_end(rp, pos, end);
60716Svbart@nginx.com }
60816Svbart@nginx.com 
60916Svbart@nginx.com 
61016Svbart@nginx.com static nxt_int_t
61116Svbart@nginx.com nxt_http_parse_field_value(nxt_http_request_parse_t *rp, u_char **pos,
61216Svbart@nginx.com     u_char *end)
61316Svbart@nginx.com {
614574Svbart@nginx.com     u_char  *p, *start, ch;
615417Svbart@nginx.com     size_t  len;
61616Svbart@nginx.com 
61716Svbart@nginx.com     p = *pos;
61816Svbart@nginx.com 
61916Svbart@nginx.com     for ( ;; ) {
62016Svbart@nginx.com         if (nxt_slow_path(p == end)) {
62116Svbart@nginx.com             *pos = p;
62216Svbart@nginx.com             rp->handler = &nxt_http_parse_field_value;
62316Svbart@nginx.com             return NXT_AGAIN;
62416Svbart@nginx.com         }
62516Svbart@nginx.com 
626577Svbart@nginx.com         ch = *p;
627577Svbart@nginx.com 
628577Svbart@nginx.com         if (ch != ' ' && ch != '\t') {
62916Svbart@nginx.com             break;
63016Svbart@nginx.com         }
63116Svbart@nginx.com 
63216Svbart@nginx.com         p++;
63316Svbart@nginx.com     }
63416Svbart@nginx.com 
635574Svbart@nginx.com     start = p;
63616Svbart@nginx.com 
63767Svbart@nginx.com     p += rp->field_value.length;
63816Svbart@nginx.com 
639576Svbart@nginx.com     for ( ;; ) {
640576Svbart@nginx.com         p = nxt_http_lookup_field_end(p, end);
641417Svbart@nginx.com 
642576Svbart@nginx.com         if (nxt_slow_path(p == end)) {
643576Svbart@nginx.com             *pos = start;
644576Svbart@nginx.com 
645576Svbart@nginx.com             len = p - start;
646574Svbart@nginx.com 
647576Svbart@nginx.com             if (nxt_slow_path(len > NXT_HTTP_MAX_FIELD_VALUE)) {
648576Svbart@nginx.com                 return NXT_HTTP_PARSE_TOO_LARGE_FIELD;
649576Svbart@nginx.com             }
650417Svbart@nginx.com 
651576Svbart@nginx.com             rp->field_value.length = len;
652576Svbart@nginx.com             rp->handler = &nxt_http_parse_field_value;
653576Svbart@nginx.com             return NXT_AGAIN;
65416Svbart@nginx.com         }
65516Svbart@nginx.com 
656576Svbart@nginx.com         ch = *p;
657576Svbart@nginx.com 
658576Svbart@nginx.com         if (nxt_fast_path(ch == '\r' || ch == '\n')) {
659576Svbart@nginx.com             break;
660576Svbart@nginx.com         }
66116Svbart@nginx.com 
662576Svbart@nginx.com         if (ch != '\t') {
663576Svbart@nginx.com             return NXT_HTTP_PARSE_INVALID;
664576Svbart@nginx.com         }
66516Svbart@nginx.com 
666576Svbart@nginx.com         p++;
66716Svbart@nginx.com     }
66816Svbart@nginx.com 
669574Svbart@nginx.com     *pos = p;
670574Svbart@nginx.com 
671574Svbart@nginx.com     if (nxt_fast_path(p != start)) {
672577Svbart@nginx.com 
673577Svbart@nginx.com         while (p[-1] == ' ' || p[-1] == '\t') {
67416Svbart@nginx.com             p--;
67516Svbart@nginx.com         }
67616Svbart@nginx.com     }
67716Svbart@nginx.com 
678574Svbart@nginx.com     len = p - start;
679417Svbart@nginx.com 
680417Svbart@nginx.com     if (nxt_slow_path(len > NXT_HTTP_MAX_FIELD_VALUE)) {
681480Svbart@nginx.com         return NXT_HTTP_PARSE_TOO_LARGE_FIELD;
682417Svbart@nginx.com     }
683417Svbart@nginx.com 
684417Svbart@nginx.com     rp->field_value.length = len;
685574Svbart@nginx.com     rp->field_value.start = start;
68616Svbart@nginx.com 
68716Svbart@nginx.com     return nxt_http_parse_field_end(rp, pos, end);
68816Svbart@nginx.com }
68916Svbart@nginx.com 
69016Svbart@nginx.com 
69116Svbart@nginx.com static u_char *
69216Svbart@nginx.com nxt_http_lookup_field_end(u_char *p, u_char *end)
69316Svbart@nginx.com {
694409Svbart@nginx.com     while (nxt_fast_path(end - p >= 16)) {
695409Svbart@nginx.com 
696409Svbart@nginx.com #define nxt_field_end_test_char(ch)                                           \
697409Svbart@nginx.com                                                                               \
698611Svbart@nginx.com         /* Values below 0x20 become more than 0xDF. */                        \
699611Svbart@nginx.com         if (nxt_slow_path((u_char) ((ch) - 0x20) > 0x5E)) {                   \
700409Svbart@nginx.com             return &(ch);                                                     \
701409Svbart@nginx.com         }
702409Svbart@nginx.com 
703409Svbart@nginx.com /* enddef */
704409Svbart@nginx.com 
705409Svbart@nginx.com         nxt_field_end_test_char(p[0]);
706409Svbart@nginx.com         nxt_field_end_test_char(p[1]);
707409Svbart@nginx.com         nxt_field_end_test_char(p[2]);
708409Svbart@nginx.com         nxt_field_end_test_char(p[3]);
70916Svbart@nginx.com 
710409Svbart@nginx.com         nxt_field_end_test_char(p[4]);
711409Svbart@nginx.com         nxt_field_end_test_char(p[5]);
712409Svbart@nginx.com         nxt_field_end_test_char(p[6]);
713409Svbart@nginx.com         nxt_field_end_test_char(p[7]);
714409Svbart@nginx.com 
715409Svbart@nginx.com         nxt_field_end_test_char(p[8]);
716409Svbart@nginx.com         nxt_field_end_test_char(p[9]);
717409Svbart@nginx.com         nxt_field_end_test_char(p[10]);
718409Svbart@nginx.com         nxt_field_end_test_char(p[11]);
719409Svbart@nginx.com 
720409Svbart@nginx.com         nxt_field_end_test_char(p[12]);
721409Svbart@nginx.com         nxt_field_end_test_char(p[13]);
722409Svbart@nginx.com         nxt_field_end_test_char(p[14]);
723409Svbart@nginx.com         nxt_field_end_test_char(p[15]);
724409Svbart@nginx.com 
725409Svbart@nginx.com         p += 16;
72616Svbart@nginx.com     }
72716Svbart@nginx.com 
728409Svbart@nginx.com     while (nxt_fast_path(end - p >= 4)) {
72919Svbart@nginx.com 
730409Svbart@nginx.com         nxt_field_end_test_char(p[0]);
731409Svbart@nginx.com         nxt_field_end_test_char(p[1]);
732409Svbart@nginx.com         nxt_field_end_test_char(p[2]);
733409Svbart@nginx.com         nxt_field_end_test_char(p[3]);
73416Svbart@nginx.com 
735409Svbart@nginx.com         p += 4;
73619Svbart@nginx.com     }
73719Svbart@nginx.com 
73819Svbart@nginx.com     switch (end - p) {
73916Svbart@nginx.com     case 3:
740409Svbart@nginx.com         nxt_field_end_test_char(*p); p++;
74139Svbart@nginx.com         /* Fall through. */
74216Svbart@nginx.com     case 2:
743409Svbart@nginx.com         nxt_field_end_test_char(*p); p++;
74439Svbart@nginx.com         /* Fall through. */
74516Svbart@nginx.com     case 1:
746409Svbart@nginx.com         nxt_field_end_test_char(*p); p++;
74739Svbart@nginx.com         /* Fall through. */
74816Svbart@nginx.com     case 0:
74916Svbart@nginx.com         break;
75016Svbart@nginx.com     default:
75116Svbart@nginx.com         nxt_unreachable();
75216Svbart@nginx.com     }
75316Svbart@nginx.com 
75416Svbart@nginx.com     return p;
75516Svbart@nginx.com }
75616Svbart@nginx.com 
75716Svbart@nginx.com 
75816Svbart@nginx.com static nxt_int_t
75916Svbart@nginx.com nxt_http_parse_field_end(nxt_http_request_parse_t *rp, u_char **pos,
76016Svbart@nginx.com     u_char *end)
76116Svbart@nginx.com {
76260Svbart@nginx.com     u_char            *p;
76360Svbart@nginx.com     nxt_http_field_t  *field;
76416Svbart@nginx.com 
76516Svbart@nginx.com     p = *pos;
76616Svbart@nginx.com 
76716Svbart@nginx.com     if (nxt_fast_path(*p == '\r')) {
76816Svbart@nginx.com         p++;
76916Svbart@nginx.com 
77016Svbart@nginx.com         if (nxt_slow_path(p == end)) {
77116Svbart@nginx.com             rp->handler = &nxt_http_parse_field_end;
77216Svbart@nginx.com             return NXT_AGAIN;
77316Svbart@nginx.com         }
77416Svbart@nginx.com     }
77516Svbart@nginx.com 
77616Svbart@nginx.com     if (nxt_fast_path(*p == '\n')) {
77716Svbart@nginx.com         *pos = p + 1;
77816Svbart@nginx.com 
77967Svbart@nginx.com         if (rp->field_name.length != 0) {
78060Svbart@nginx.com             field = nxt_list_add(rp->fields);
78116Svbart@nginx.com 
78260Svbart@nginx.com             if (nxt_slow_path(field == NULL)) {
78360Svbart@nginx.com                 return NXT_ERROR;
78416Svbart@nginx.com             }
78516Svbart@nginx.com 
786417Svbart@nginx.com             field->hash = nxt_http_field_hash_end(rp->field_hash);
787417Svbart@nginx.com             field->skip = 0;
78860Svbart@nginx.com 
789417Svbart@nginx.com             field->name_length = rp->field_name.length;
790417Svbart@nginx.com             field->value_length = rp->field_value.length;
791417Svbart@nginx.com             field->name = rp->field_name.start;
792417Svbart@nginx.com             field->value = rp->field_value.start;
79367Svbart@nginx.com 
794417Svbart@nginx.com             rp->field_hash = NXT_HTTP_FIELD_HASH_INIT;
79567Svbart@nginx.com 
79667Svbart@nginx.com             rp->field_name.length = 0;
79767Svbart@nginx.com             rp->field_value.length = 0;
79816Svbart@nginx.com 
79916Svbart@nginx.com             rp->handler = &nxt_http_parse_field_name;
80016Svbart@nginx.com             return NXT_OK;
80116Svbart@nginx.com         }
80216Svbart@nginx.com 
80316Svbart@nginx.com         return NXT_DONE;
80416Svbart@nginx.com     }
80516Svbart@nginx.com 
806480Svbart@nginx.com     return NXT_HTTP_PARSE_INVALID;
80716Svbart@nginx.com }
80816Svbart@nginx.com 
80916Svbart@nginx.com 
810112Smax.romanov@nginx.com #define                                                                       \
811112Smax.romanov@nginx.com nxt_http_is_normal(c)                                                         \
812112Smax.romanov@nginx.com     (nxt_fast_path((nxt_http_normal[c / 8] & (1 << (c & 7))) != 0))
813112Smax.romanov@nginx.com 
814112Smax.romanov@nginx.com 
815112Smax.romanov@nginx.com static const uint8_t  nxt_http_normal[32]  nxt_aligned(32) = {
816112Smax.romanov@nginx.com 
817112Smax.romanov@nginx.com                              /*        \0   \r  \n                         */
818611Svbart@nginx.com     0xFE, 0xDB, 0xFF, 0xFF,  /* 1111 1110  1101 1011  1111 1111  1111 1111 */
819112Smax.romanov@nginx.com 
820112Smax.romanov@nginx.com                              /* '&%$ #"!   /.-, |*)(  7654 3210  ?>=< ;:98 */
821611Svbart@nginx.com     0xD6, 0x37, 0xFF, 0x7F,  /* 1101 0110  0011 0111  1111 1111  0111 1111 */
822112Smax.romanov@nginx.com 
823112Smax.romanov@nginx.com                              /* GFED CBA@  ONML KJIH  WVUT SRQP  _^]\ [ZYX */
824611Svbart@nginx.com     0xFF, 0xFF, 0xFF, 0xFF,  /* 1111 1111  1111 1111  1111 1111  1111 1111 */
825112Smax.romanov@nginx.com 
826112Smax.romanov@nginx.com                              /* gfed cba`  onml kjih  wvut srqp   ~}| {zyx */
827611Svbart@nginx.com     0xFF, 0xFF, 0xFF, 0xFF,  /* 1111 1111  1111 1111  1111 1111  1111 1111 */
828112Smax.romanov@nginx.com 
829611Svbart@nginx.com     0xFF, 0xFF, 0xFF, 0xFF,  /* 1111 1111  1111 1111  1111 1111  1111 1111 */
830611Svbart@nginx.com     0xFF, 0xFF, 0xFF, 0xFF,  /* 1111 1111  1111 1111  1111 1111  1111 1111 */
831611Svbart@nginx.com     0xFF, 0xFF, 0xFF, 0xFF,  /* 1111 1111  1111 1111  1111 1111  1111 1111 */
832611Svbart@nginx.com     0xFF, 0xFF, 0xFF, 0xFF,  /* 1111 1111  1111 1111  1111 1111  1111 1111 */
833112Smax.romanov@nginx.com };
834112Smax.romanov@nginx.com 
835112Smax.romanov@nginx.com 
836112Smax.romanov@nginx.com static nxt_int_t
837112Smax.romanov@nginx.com nxt_http_parse_complex_target(nxt_http_request_parse_t *rp)
838112Smax.romanov@nginx.com {
839112Smax.romanov@nginx.com     u_char  *p, *u, c, ch, high;
840112Smax.romanov@nginx.com     enum {
841112Smax.romanov@nginx.com         sw_normal = 0,
842112Smax.romanov@nginx.com         sw_slash,
843112Smax.romanov@nginx.com         sw_dot,
844112Smax.romanov@nginx.com         sw_dot_dot,
845112Smax.romanov@nginx.com         sw_quoted,
846112Smax.romanov@nginx.com         sw_quoted_second,
847112Smax.romanov@nginx.com     } state, saved_state;
848112Smax.romanov@nginx.com 
849112Smax.romanov@nginx.com     nxt_prefetch(nxt_http_normal);
850112Smax.romanov@nginx.com 
851112Smax.romanov@nginx.com     state = sw_normal;
852112Smax.romanov@nginx.com     saved_state = sw_normal;
853112Smax.romanov@nginx.com     p = rp->target_start;
854112Smax.romanov@nginx.com 
855112Smax.romanov@nginx.com     u = nxt_mp_alloc(rp->mem_pool, rp->target_end - p + 1);
856112Smax.romanov@nginx.com 
857112Smax.romanov@nginx.com     if (nxt_slow_path(u == NULL)) {
858112Smax.romanov@nginx.com         return NXT_ERROR;
859112Smax.romanov@nginx.com     }
860112Smax.romanov@nginx.com 
861112Smax.romanov@nginx.com     rp->path.length = 0;
862112Smax.romanov@nginx.com     rp->path.start = u;
863112Smax.romanov@nginx.com 
864112Smax.romanov@nginx.com     high = '\0';
865112Smax.romanov@nginx.com     rp->exten_start = NULL;
866112Smax.romanov@nginx.com     rp->args_start = NULL;
867112Smax.romanov@nginx.com 
868112Smax.romanov@nginx.com     while (p < rp->target_end) {
869112Smax.romanov@nginx.com 
870112Smax.romanov@nginx.com         ch = *p++;
871112Smax.romanov@nginx.com 
872112Smax.romanov@nginx.com     again:
873112Smax.romanov@nginx.com 
874112Smax.romanov@nginx.com         switch (state) {
875112Smax.romanov@nginx.com 
876112Smax.romanov@nginx.com         case sw_normal:
877112Smax.romanov@nginx.com 
878112Smax.romanov@nginx.com             if (nxt_http_is_normal(ch)) {
879112Smax.romanov@nginx.com                 *u++ = ch;
880112Smax.romanov@nginx.com                 continue;
881112Smax.romanov@nginx.com             }
882112Smax.romanov@nginx.com 
883112Smax.romanov@nginx.com             switch (ch) {
884112Smax.romanov@nginx.com             case '/':
885112Smax.romanov@nginx.com                 rp->exten_start = NULL;
886112Smax.romanov@nginx.com                 state = sw_slash;
887112Smax.romanov@nginx.com                 *u++ = ch;
888112Smax.romanov@nginx.com                 continue;
889112Smax.romanov@nginx.com             case '%':
890112Smax.romanov@nginx.com                 saved_state = state;
891112Smax.romanov@nginx.com                 state = sw_quoted;
892112Smax.romanov@nginx.com                 continue;
893112Smax.romanov@nginx.com             case '?':
894112Smax.romanov@nginx.com                 rp->args_start = p;
895112Smax.romanov@nginx.com                 goto args;
896112Smax.romanov@nginx.com             case '#':
897112Smax.romanov@nginx.com                 goto done;
898112Smax.romanov@nginx.com             case '.':
899112Smax.romanov@nginx.com                 rp->exten_start = u + 1;
900112Smax.romanov@nginx.com                 *u++ = ch;
901112Smax.romanov@nginx.com                 continue;
902112Smax.romanov@nginx.com             case '+':
903112Smax.romanov@nginx.com                 rp->plus_in_target = 1;
904112Smax.romanov@nginx.com                 /* Fall through. */
905112Smax.romanov@nginx.com             default:
906112Smax.romanov@nginx.com                 *u++ = ch;
907112Smax.romanov@nginx.com                 continue;
908112Smax.romanov@nginx.com             }
909112Smax.romanov@nginx.com 
910112Smax.romanov@nginx.com             break;
911112Smax.romanov@nginx.com 
912112Smax.romanov@nginx.com         case sw_slash:
913112Smax.romanov@nginx.com 
914112Smax.romanov@nginx.com             if (nxt_http_is_normal(ch)) {
915112Smax.romanov@nginx.com                 state = sw_normal;
916112Smax.romanov@nginx.com                 *u++ = ch;
917112Smax.romanov@nginx.com                 continue;
918112Smax.romanov@nginx.com             }
919112Smax.romanov@nginx.com 
920112Smax.romanov@nginx.com             switch (ch) {
921112Smax.romanov@nginx.com             case '/':
922112Smax.romanov@nginx.com                 continue;
923112Smax.romanov@nginx.com             case '.':
924112Smax.romanov@nginx.com                 state = sw_dot;
925112Smax.romanov@nginx.com                 *u++ = ch;
926112Smax.romanov@nginx.com                 continue;
927112Smax.romanov@nginx.com             case '%':
928112Smax.romanov@nginx.com                 saved_state = state;
929112Smax.romanov@nginx.com                 state = sw_quoted;
930112Smax.romanov@nginx.com                 continue;
931112Smax.romanov@nginx.com             case '?':
932112Smax.romanov@nginx.com                 rp->args_start = p;
933112Smax.romanov@nginx.com                 goto args;
934112Smax.romanov@nginx.com             case '#':
935112Smax.romanov@nginx.com                 goto done;
936112Smax.romanov@nginx.com             case '+':
937112Smax.romanov@nginx.com                 rp->plus_in_target = 1;
938112Smax.romanov@nginx.com                 /* Fall through. */
939112Smax.romanov@nginx.com             default:
940112Smax.romanov@nginx.com                 state = sw_normal;
941112Smax.romanov@nginx.com                 *u++ = ch;
942112Smax.romanov@nginx.com                 continue;
943112Smax.romanov@nginx.com             }
944112Smax.romanov@nginx.com 
945112Smax.romanov@nginx.com             break;
946112Smax.romanov@nginx.com 
947112Smax.romanov@nginx.com         case sw_dot:
948112Smax.romanov@nginx.com 
949112Smax.romanov@nginx.com             if (nxt_http_is_normal(ch)) {
950112Smax.romanov@nginx.com                 state = sw_normal;
951112Smax.romanov@nginx.com                 *u++ = ch;
952112Smax.romanov@nginx.com                 continue;
953112Smax.romanov@nginx.com             }
954112Smax.romanov@nginx.com 
955112Smax.romanov@nginx.com             switch (ch) {
956112Smax.romanov@nginx.com             case '/':
957112Smax.romanov@nginx.com                 state = sw_slash;
958112Smax.romanov@nginx.com                 u--;
959112Smax.romanov@nginx.com                 continue;
960112Smax.romanov@nginx.com             case '.':
961112Smax.romanov@nginx.com                 state = sw_dot_dot;
962112Smax.romanov@nginx.com                 *u++ = ch;
963112Smax.romanov@nginx.com                 continue;
964112Smax.romanov@nginx.com             case '%':
965112Smax.romanov@nginx.com                 saved_state = state;
966112Smax.romanov@nginx.com                 state = sw_quoted;
967112Smax.romanov@nginx.com                 continue;
968112Smax.romanov@nginx.com             case '?':
969112Smax.romanov@nginx.com                 rp->args_start = p;
970112Smax.romanov@nginx.com                 goto args;
971112Smax.romanov@nginx.com             case '#':
972112Smax.romanov@nginx.com                 goto done;
973112Smax.romanov@nginx.com             case '+':
974112Smax.romanov@nginx.com                 rp->plus_in_target = 1;
975112Smax.romanov@nginx.com                 /* Fall through. */
976112Smax.romanov@nginx.com             default:
977112Smax.romanov@nginx.com                 state = sw_normal;
978112Smax.romanov@nginx.com                 *u++ = ch;
979112Smax.romanov@nginx.com                 continue;
980112Smax.romanov@nginx.com             }
981112Smax.romanov@nginx.com 
982112Smax.romanov@nginx.com             break;
983112Smax.romanov@nginx.com 
984112Smax.romanov@nginx.com         case sw_dot_dot:
985112Smax.romanov@nginx.com 
986112Smax.romanov@nginx.com             if (nxt_http_is_normal(ch)) {
987112Smax.romanov@nginx.com                 state = sw_normal;
988112Smax.romanov@nginx.com                 *u++ = ch;
989112Smax.romanov@nginx.com                 continue;
990112Smax.romanov@nginx.com             }
991112Smax.romanov@nginx.com 
992112Smax.romanov@nginx.com             switch (ch) {
993112Smax.romanov@nginx.com             case '/':
994112Smax.romanov@nginx.com                 state = sw_slash;
995112Smax.romanov@nginx.com                 u -= 5;
996112Smax.romanov@nginx.com                 for ( ;; ) {
997112Smax.romanov@nginx.com                     if (u < rp->path.start) {
998480Svbart@nginx.com                         return NXT_HTTP_PARSE_INVALID;
999112Smax.romanov@nginx.com                     }
1000112Smax.romanov@nginx.com                     if (*u == '/') {
1001112Smax.romanov@nginx.com                         u++;
1002112Smax.romanov@nginx.com                         break;
1003112Smax.romanov@nginx.com                     }
1004112Smax.romanov@nginx.com                     u--;
1005112Smax.romanov@nginx.com                 }
1006112Smax.romanov@nginx.com                 break;
1007112Smax.romanov@nginx.com 
1008112Smax.romanov@nginx.com             case '%':
1009112Smax.romanov@nginx.com                 saved_state = state;
1010112Smax.romanov@nginx.com                 state = sw_quoted;
1011112Smax.romanov@nginx.com                 continue;
1012112Smax.romanov@nginx.com             case '?':
1013112Smax.romanov@nginx.com                 rp->args_start = p;
1014112Smax.romanov@nginx.com                 goto args;
1015112Smax.romanov@nginx.com             case '#':
1016112Smax.romanov@nginx.com                 goto done;
1017112Smax.romanov@nginx.com             case '+':
1018112Smax.romanov@nginx.com                 rp->plus_in_target = 1;
1019112Smax.romanov@nginx.com                 /* Fall through. */
1020112Smax.romanov@nginx.com             default:
1021112Smax.romanov@nginx.com                 state = sw_normal;
1022112Smax.romanov@nginx.com                 *u++ = ch;
1023112Smax.romanov@nginx.com                 continue;
1024112Smax.romanov@nginx.com             }
1025112Smax.romanov@nginx.com 
1026112Smax.romanov@nginx.com             break;
1027112Smax.romanov@nginx.com 
1028112Smax.romanov@nginx.com         case sw_quoted:
1029112Smax.romanov@nginx.com             rp->quoted_target = 1;
1030112Smax.romanov@nginx.com 
1031112Smax.romanov@nginx.com             if (ch >= '0' && ch <= '9') {
1032112Smax.romanov@nginx.com                 high = (u_char) (ch - '0');
1033112Smax.romanov@nginx.com                 state = sw_quoted_second;
1034112Smax.romanov@nginx.com                 continue;
1035112Smax.romanov@nginx.com             }
1036112Smax.romanov@nginx.com 
1037112Smax.romanov@nginx.com             c = (u_char) (ch | 0x20);
1038112Smax.romanov@nginx.com             if (c >= 'a' && c <= 'f') {
1039112Smax.romanov@nginx.com                 high = (u_char) (c - 'a' + 10);
1040112Smax.romanov@nginx.com                 state = sw_quoted_second;
1041112Smax.romanov@nginx.com                 continue;
1042112Smax.romanov@nginx.com             }
1043112Smax.romanov@nginx.com 
1044480Svbart@nginx.com             return NXT_HTTP_PARSE_INVALID;
1045112Smax.romanov@nginx.com 
1046112Smax.romanov@nginx.com         case sw_quoted_second:
1047112Smax.romanov@nginx.com             if (ch >= '0' && ch <= '9') {
1048112Smax.romanov@nginx.com                 ch = (u_char) ((high << 4) + ch - '0');
1049112Smax.romanov@nginx.com 
1050112Smax.romanov@nginx.com                 if (ch == '%' || ch == '#') {
1051112Smax.romanov@nginx.com                     state = sw_normal;
1052112Smax.romanov@nginx.com                     *u++ = ch;
1053112Smax.romanov@nginx.com                     continue;
1054112Smax.romanov@nginx.com 
1055112Smax.romanov@nginx.com                 } else if (ch == '\0') {
1056480Svbart@nginx.com                     return NXT_HTTP_PARSE_INVALID;
1057112Smax.romanov@nginx.com                 }
1058112Smax.romanov@nginx.com 
1059112Smax.romanov@nginx.com                 state = saved_state;
1060112Smax.romanov@nginx.com                 goto again;
1061112Smax.romanov@nginx.com             }
1062112Smax.romanov@nginx.com 
1063112Smax.romanov@nginx.com             c = (u_char) (ch | 0x20);
1064112Smax.romanov@nginx.com             if (c >= 'a' && c <= 'f') {
1065112Smax.romanov@nginx.com                 ch = (u_char) ((high << 4) + c - 'a' + 10);
1066112Smax.romanov@nginx.com 
1067112Smax.romanov@nginx.com                 if (ch == '?') {
1068112Smax.romanov@nginx.com                     state = sw_normal;
1069112Smax.romanov@nginx.com                     *u++ = ch;
1070112Smax.romanov@nginx.com                     continue;
1071112Smax.romanov@nginx.com 
1072112Smax.romanov@nginx.com                 } else if (ch == '+') {
1073112Smax.romanov@nginx.com                     rp->plus_in_target = 1;
1074112Smax.romanov@nginx.com                 }
1075112Smax.romanov@nginx.com 
1076112Smax.romanov@nginx.com                 state = saved_state;
1077112Smax.romanov@nginx.com                 goto again;
1078112Smax.romanov@nginx.com             }
1079