Mercurial > hg > nginx
annotate src/core/ngx_bpf.c @ 8794:ba5977b38b2e quic
HTTP/3: reordered H3_MISSING_SETTINGS and H3_FRAME_UNEXPECTED.
The quic-http-34 is ambiguous as to what error should be generated for the
first frame in control stream:
Each side MUST initiate a single control stream at the beginning of
the connection and send its SETTINGS frame as the first frame on this
stream. If the first frame of the control stream is any other frame
type, this MUST be treated as a connection error of type
H3_MISSING_SETTINGS.
If a DATA frame is received on a control stream, the recipient MUST
respond with a connection error of type H3_FRAME_UNEXPECTED.
If a HEADERS frame is received on a control stream, the recipient MUST
respond with a connection error of type H3_FRAME_UNEXPECTED.
Previously, H3_FRAME_UNEXPECTED had priority, but now H3_MISSING_SETTINGS has.
The arguments in the spec sound more compelling for H3_MISSING_SETTINGS.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Fri, 11 Jun 2021 10:56:51 +0300 |
parents | 7a07724256c2 |
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1 |
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2 /* |
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3 * Copyright (C) Nginx, Inc. |
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 #define NGX_BPF_LOGBUF_SIZE (16 * 1024) |
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11 |
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12 |
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13 static ngx_inline int |
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14 ngx_bpf(enum bpf_cmd cmd, union bpf_attr *attr, unsigned int size) |
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15 { |
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16 return syscall(__NR_bpf, cmd, attr, size); |
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17 } |
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18 |
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19 |
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20 void |
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21 ngx_bpf_program_link(ngx_bpf_program_t *program, const char *symbol, int fd) |
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22 { |
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23 ngx_uint_t i; |
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24 ngx_bpf_reloc_t *rl; |
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25 |
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26 rl = program->relocs; |
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27 |
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28 for (i = 0; i < program->nrelocs; i++) { |
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29 if (ngx_strcmp(rl[i].name, symbol) == 0) { |
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30 program->ins[rl[i].offset].src_reg = 1; |
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31 program->ins[rl[i].offset].imm = fd; |
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32 } |
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33 } |
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34 } |
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35 |
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36 |
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37 int |
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38 ngx_bpf_load_program(ngx_log_t *log, ngx_bpf_program_t *program) |
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39 { |
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40 int fd; |
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41 union bpf_attr attr; |
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42 #if (NGX_DEBUG) |
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43 char buf[NGX_BPF_LOGBUF_SIZE]; |
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44 #endif |
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45 |
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46 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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47 |
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48 attr.license = (uintptr_t) program->license; |
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49 attr.prog_type = program->type; |
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50 attr.insns = (uintptr_t) program->ins; |
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51 attr.insn_cnt = program->nins; |
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52 |
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53 #if (NGX_DEBUG) |
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54 /* for verifier errors */ |
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55 attr.log_buf = (uintptr_t) buf; |
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56 attr.log_size = NGX_BPF_LOGBUF_SIZE; |
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57 attr.log_level = 1; |
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58 #endif |
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59 |
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60 fd = ngx_bpf(BPF_PROG_LOAD, &attr, sizeof(attr)); |
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61 if (fd < 0) { |
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62 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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63 "failed to load BPF program"); |
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64 |
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65 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, |
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66 "bpf verifier: %s", buf); |
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67 |
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68 return -1; |
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69 } |
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70 |
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71 return fd; |
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72 } |
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73 |
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74 |
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75 int |
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76 ngx_bpf_map_create(ngx_log_t *log, enum bpf_map_type type, int key_size, |
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77 int value_size, int max_entries, uint32_t map_flags) |
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78 { |
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79 int fd; |
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80 union bpf_attr attr; |
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81 |
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82 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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83 |
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84 attr.map_type = type; |
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85 attr.key_size = key_size; |
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86 attr.value_size = value_size; |
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87 attr.max_entries = max_entries; |
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88 attr.map_flags = map_flags; |
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89 |
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90 fd = ngx_bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); |
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91 if (fd < 0) { |
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92 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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93 "failed to create BPF map"); |
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94 return NGX_ERROR; |
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95 } |
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96 |
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97 return fd; |
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98 } |
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99 |
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100 |
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101 int |
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102 ngx_bpf_map_update(int fd, const void *key, const void *value, uint64_t flags) |
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103 { |
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104 union bpf_attr attr; |
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105 |
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106 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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107 |
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108 attr.map_fd = fd; |
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109 attr.key = (uintptr_t) key; |
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110 attr.value = (uintptr_t) value; |
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111 attr.flags = flags; |
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112 |
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113 return ngx_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); |
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114 } |
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115 |
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116 |
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117 int |
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118 ngx_bpf_map_delete(int fd, const void *key) |
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119 { |
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120 union bpf_attr attr; |
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121 |
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122 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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123 |
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124 attr.map_fd = fd; |
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125 attr.key = (uintptr_t) key; |
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126 |
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127 return ngx_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); |
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128 } |
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129 |
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130 |
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131 int |
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132 ngx_bpf_map_lookup(int fd, const void *key, void *value) |
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133 { |
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134 union bpf_attr attr; |
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135 |
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136 ngx_memzero(&attr, sizeof(union bpf_attr)); |
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137 |
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138 attr.map_fd = fd; |
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139 attr.key = (uintptr_t) key; |
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140 attr.value = (uintptr_t) value; |
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141 |
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142 return ngx_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); |
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143 } |