Mercurial > hg > nginx
view src/core/ngx_bpf.c @ 9274:46ecad404a29 default tip
Mail: reset imap tag to empty after authentication attempt.
We need to reset the imap tag to empty after an authentication attempt
completes, otherwise if the next line parsed is incomplete with no tag
(e.g. empty line) then we use the "tag" from the previous buffer which
is now definitely wrong and has been partially overwritten with the most
recently read data (e.g. CRLF).
An example before this patch:
S: * OK IMAP4 ready
C: foobar login a b
S: foobar NO Incorrect username or password.
C:
S:
S: obar BAD invalid command
Then with this patch:
S: * OK IMAP4 ready
C: foobar login a b
S: foobar NO Incorrect username or password.
C:
S: * BAD invalid command
author | Rob Mueller <robm@fastmailteam.com> |
---|---|
date | Wed, 15 May 2024 10:06:00 +0300 |
parents | 7a07724256c2 |
children |
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line source
/* * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #define NGX_BPF_LOGBUF_SIZE (16 * 1024) static ngx_inline int ngx_bpf(enum bpf_cmd cmd, union bpf_attr *attr, unsigned int size) { return syscall(__NR_bpf, cmd, attr, size); } void ngx_bpf_program_link(ngx_bpf_program_t *program, const char *symbol, int fd) { ngx_uint_t i; ngx_bpf_reloc_t *rl; rl = program->relocs; for (i = 0; i < program->nrelocs; i++) { if (ngx_strcmp(rl[i].name, symbol) == 0) { program->ins[rl[i].offset].src_reg = 1; program->ins[rl[i].offset].imm = fd; } } } int ngx_bpf_load_program(ngx_log_t *log, ngx_bpf_program_t *program) { int fd; union bpf_attr attr; #if (NGX_DEBUG) char buf[NGX_BPF_LOGBUF_SIZE]; #endif ngx_memzero(&attr, sizeof(union bpf_attr)); attr.license = (uintptr_t) program->license; attr.prog_type = program->type; attr.insns = (uintptr_t) program->ins; attr.insn_cnt = program->nins; #if (NGX_DEBUG) /* for verifier errors */ attr.log_buf = (uintptr_t) buf; attr.log_size = NGX_BPF_LOGBUF_SIZE; attr.log_level = 1; #endif fd = ngx_bpf(BPF_PROG_LOAD, &attr, sizeof(attr)); if (fd < 0) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "failed to load BPF program"); ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0, "bpf verifier: %s", buf); return -1; } return fd; } int ngx_bpf_map_create(ngx_log_t *log, enum bpf_map_type type, int key_size, int value_size, int max_entries, uint32_t map_flags) { int fd; union bpf_attr attr; ngx_memzero(&attr, sizeof(union bpf_attr)); attr.map_type = type; attr.key_size = key_size; attr.value_size = value_size; attr.max_entries = max_entries; attr.map_flags = map_flags; fd = ngx_bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); if (fd < 0) { ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "failed to create BPF map"); return NGX_ERROR; } return fd; } int ngx_bpf_map_update(int fd, const void *key, const void *value, uint64_t flags) { union bpf_attr attr; ngx_memzero(&attr, sizeof(union bpf_attr)); attr.map_fd = fd; attr.key = (uintptr_t) key; attr.value = (uintptr_t) value; attr.flags = flags; return ngx_bpf(BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr)); } int ngx_bpf_map_delete(int fd, const void *key) { union bpf_attr attr; ngx_memzero(&attr, sizeof(union bpf_attr)); attr.map_fd = fd; attr.key = (uintptr_t) key; return ngx_bpf(BPF_MAP_DELETE_ELEM, &attr, sizeof(attr)); } int ngx_bpf_map_lookup(int fd, const void *key, void *value) { union bpf_attr attr; ngx_memzero(&attr, sizeof(union bpf_attr)); attr.map_fd = fd; attr.key = (uintptr_t) key; attr.value = (uintptr_t) value; return ngx_bpf(BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr)); }