Mercurial > hg > nginx
annotate src/os/unix/ngx_shmem.c @ 9153:8f7e6d8c061e
QUIC: use last client dcid to receive initial packets.
Previously, original dcid was used to receive initial client packets in case
server initial response was lost. However, last dcid should be used instead.
These two are the same unless retry is used. In case of retry, client resends
initial packet with a new dcid, that is different from the original dcid. If
server response is lost, the client resends this packet again with the same
dcid. This is shown in RFC 9000, 7.3. Authenticating Connection IDs, Figure 8.
The issue manifested itself with creating multiple server sessions in response
to each post-retry client initial packet, if server response is lost.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Wed, 30 Aug 2023 11:09:21 +0400 |
parents | d620f497c50f |
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rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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11 |
469 | 12 #if (NGX_HAVE_MAP_ANON) |
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13 |
605 | 14 ngx_int_t |
15 ngx_shm_alloc(ngx_shm_t *shm) | |
358
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16 { |
639 | 17 shm->addr = (u_char *) mmap(NULL, shm->size, |
18 PROT_READ|PROT_WRITE, | |
19 MAP_ANON|MAP_SHARED, -1, 0); | |
358
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20 |
605 | 21 if (shm->addr == MAP_FAILED) { |
22 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, | |
23 "mmap(MAP_ANON|MAP_SHARED, %uz) failed", shm->size); | |
24 return NGX_ERROR; | |
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25 } |
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26 |
605 | 27 return NGX_OK; |
28 } | |
29 | |
30 | |
31 void | |
32 ngx_shm_free(ngx_shm_t *shm) | |
33 { | |
639 | 34 if (munmap((void *) shm->addr, shm->size) == -1) { |
605 | 35 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
36 "munmap(%p, %uz) failed", shm->addr, shm->size); | |
37 } | |
358
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38 } |
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39 |
469 | 40 #elif (NGX_HAVE_MAP_DEVZERO) |
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41 |
605 | 42 ngx_int_t |
43 ngx_shm_alloc(ngx_shm_t *shm) | |
358
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44 { |
605 | 45 ngx_fd_t fd; |
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46 |
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47 fd = open("/dev/zero", O_RDWR); |
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48 |
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49 if (fd == -1) { |
605 | 50 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
467 | 51 "open(\"/dev/zero\") failed"); |
605 | 52 return NGX_ERROR; |
358
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53 } |
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54 |
639 | 55 shm->addr = (u_char *) mmap(NULL, shm->size, PROT_READ|PROT_WRITE, |
56 MAP_SHARED, fd, 0); | |
358
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57 |
605 | 58 if (shm->addr == MAP_FAILED) { |
59 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, | |
60 "mmap(/dev/zero, MAP_SHARED, %uz) failed", shm->size); | |
358
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61 } |
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62 |
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63 if (close(fd) == -1) { |
605 | 64 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
467 | 65 "close(\"/dev/zero\") failed"); |
358
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66 } |
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67 |
605 | 68 return (shm->addr == MAP_FAILED) ? NGX_ERROR : NGX_OK; |
69 } | |
70 | |
71 | |
72 void | |
73 ngx_shm_free(ngx_shm_t *shm) | |
74 { | |
639 | 75 if (munmap((void *) shm->addr, shm->size) == -1) { |
605 | 76 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
77 "munmap(%p, %uz) failed", shm->addr, shm->size); | |
78 } | |
358
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79 } |
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80 |
469 | 81 #elif (NGX_HAVE_SYSVSHM) |
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82 |
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83 #include <sys/ipc.h> |
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84 #include <sys/shm.h> |
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85 |
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86 |
605 | 87 ngx_int_t |
88 ngx_shm_alloc(ngx_shm_t *shm) | |
358
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89 { |
605 | 90 int id; |
358
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91 |
605 | 92 id = shmget(IPC_PRIVATE, shm->size, (SHM_R|SHM_W|IPC_CREAT)); |
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93 |
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94 if (id == -1) { |
605 | 95 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
96 "shmget(%uz) failed", shm->size); | |
97 return NGX_ERROR; | |
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98 } |
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99 |
605 | 100 ngx_log_debug1(NGX_LOG_DEBUG_CORE, shm->log, 0, "shmget id: %d", id); |
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101 |
605 | 102 shm->addr = shmat(id, NULL, 0); |
103 | |
104 if (shm->addr == (void *) -1) { | |
105 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "shmat() failed"); | |
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106 } |
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107 |
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108 if (shmctl(id, IPC_RMID, NULL) == -1) { |
605 | 109 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, |
110 "shmctl(IPC_RMID) failed"); | |
358
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111 } |
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112 |
605 | 113 return (shm->addr == (void *) -1) ? NGX_ERROR : NGX_OK; |
114 } | |
115 | |
116 | |
117 void | |
118 ngx_shm_free(ngx_shm_t *shm) | |
119 { | |
120 if (shmdt(shm->addr) == -1) { | |
121 ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, | |
122 "shmdt(%p) failed", shm->addr); | |
123 } | |
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124 } |
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125 |
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126 #endif |