Mercurial > hg > nginx-quic
view src/os/win32/ngx_shmem.c @ 8946:496241338da5
SSL: workaround for session timeout handling with TLSv1.3.
OpenSSL with TLSv1.3 updates the session creation time on session
resumption and keeps the session timeout unmodified, making it possible
to maintain the session forever, bypassing client certificate expiration
and revocation. To make sure session timeouts are actually used, we
now update the session creation time and reduce the session timeout
accordingly.
BoringSSL with TLSv1.3 ignores configured session timeouts and uses a
hardcoded timeout instead, 7 days. So we update session timeout to
the configured value as soon as a session is created.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 12 Oct 2022 20:14:57 +0300 |
parents | af7eba90645d |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> /* * Base addresses selected by system for shared memory mappings are likely * to be different on Windows Vista and later versions due to address space * layout randomization. This is however incompatible with storing absolute * addresses within the shared memory. * * To make it possible to store absolute addresses we create mappings * at the same address in all processes by starting mappings at predefined * addresses. The addresses were selected somewhat randomly in order to * minimize the probability that some other library doing something similar * conflicts with us. The addresses are from the following typically free * blocks: * * - 0x10000000 .. 0x70000000 (about 1.5 GB in total) on 32-bit platforms * - 0x000000007fff0000 .. 0x000007f68e8b0000 (about 8 TB) on 64-bit platforms * * Additionally, we allow to change the mapping address once it was detected * to be different from one originally used. This is needed to support * reconfiguration. */ #ifdef _WIN64 #define NGX_SHMEM_BASE 0x0000047047e00000 #else #define NGX_SHMEM_BASE 0x2efe0000 #endif ngx_uint_t ngx_allocation_granularity; ngx_int_t ngx_shm_alloc(ngx_shm_t *shm) { u_char *name; uint64_t size; static u_char *base = (u_char *) NGX_SHMEM_BASE; name = ngx_alloc(shm->name.len + 2 + NGX_INT32_LEN, shm->log); if (name == NULL) { return NGX_ERROR; } (void) ngx_sprintf(name, "%V_%s%Z", &shm->name, ngx_unique); ngx_set_errno(0); size = shm->size; shm->handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, (u_long) (size >> 32), (u_long) (size & 0xffffffff), (char *) name); if (shm->handle == NULL) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "CreateFileMapping(%uz, %s) failed", shm->size, name); ngx_free(name); return NGX_ERROR; } ngx_free(name); if (ngx_errno == ERROR_ALREADY_EXISTS) { shm->exists = 1; } shm->addr = MapViewOfFileEx(shm->handle, FILE_MAP_WRITE, 0, 0, 0, base); if (shm->addr != NULL) { base += ngx_align(size, ngx_allocation_granularity); return NGX_OK; } ngx_log_debug3(NGX_LOG_DEBUG_CORE, shm->log, ngx_errno, "MapViewOfFileEx(%uz, %p) of file mapping \"%V\" failed, " "retry without a base address", shm->size, base, &shm->name); /* * Order of shared memory zones may be different in the master process * and worker processes after reconfiguration. As a result, the above * may fail due to a conflict with a previously created mapping remapped * to a different address. Additionally, there may be a conflict with * some other uses of the memory. In this case we retry without a base * address to let the system assign the address itself. */ shm->addr = MapViewOfFile(shm->handle, FILE_MAP_WRITE, 0, 0, 0); if (shm->addr != NULL) { return NGX_OK; } ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "MapViewOfFile(%uz) of file mapping \"%V\" failed", shm->size, &shm->name); if (CloseHandle(shm->handle) == 0) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "CloseHandle() of file mapping \"%V\" failed", &shm->name); } return NGX_ERROR; } ngx_int_t ngx_shm_remap(ngx_shm_t *shm, u_char *addr) { if (UnmapViewOfFile(shm->addr) == 0) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "UnmapViewOfFile(%p) of file mapping \"%V\" failed", shm->addr, &shm->name); return NGX_ERROR; } shm->addr = MapViewOfFileEx(shm->handle, FILE_MAP_WRITE, 0, 0, 0, addr); if (shm->addr != NULL) { return NGX_OK; } ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "MapViewOfFileEx(%uz, %p) of file mapping \"%V\" failed", shm->size, addr, &shm->name); return NGX_ERROR; } void ngx_shm_free(ngx_shm_t *shm) { if (UnmapViewOfFile(shm->addr) == 0) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "UnmapViewOfFile(%p) of file mapping \"%V\" failed", shm->addr, &shm->name); } if (CloseHandle(shm->handle) == 0) { ngx_log_error(NGX_LOG_ALERT, shm->log, ngx_errno, "CloseHandle() of file mapping \"%V\" failed", &shm->name); } }