blob: 1e33c5c96cfa6c4e47166e1e016b9b70b69558ef [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#define NGX_HTTP_USERID_OFF 0
#define NGX_HTTP_USERID_LOG 1
#define NGX_HTTP_USERID_V1 2
#define NGX_HTTP_USERID_ON 3
#define NGX_HTTP_USERID_COOKIE_OFF 0x0002
#define NGX_HTTP_USERID_COOKIE_SECURE 0x0004
#define NGX_HTTP_USERID_COOKIE_HTTPONLY 0x0008
#define NGX_HTTP_USERID_COOKIE_SAMESITE 0x0010
#define NGX_HTTP_USERID_COOKIE_SAMESITE_STRICT 0x0020
#define NGX_HTTP_USERID_COOKIE_SAMESITE_LAX 0x0040
#define NGX_HTTP_USERID_COOKIE_SAMESITE_NONE 0x0080
/* 31 Dec 2037 23:55:55 GMT */
#define NGX_HTTP_USERID_MAX_EXPIRES 2145916555
typedef struct {
ngx_uint_t enable;
ngx_uint_t flags;
ngx_int_t service;
ngx_str_t name;
ngx_str_t domain;
ngx_str_t path;
ngx_str_t p3p;
time_t expires;
u_char mark;
} ngx_http_userid_conf_t;
typedef struct {
uint32_t uid_got[4];
uint32_t uid_set[4];
ngx_str_t cookie;
ngx_uint_t reset;
} ngx_http_userid_ctx_t;
static ngx_http_userid_ctx_t *ngx_http_userid_get_uid(ngx_http_request_t *r,
ngx_http_userid_conf_t *conf);
static ngx_int_t ngx_http_userid_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, ngx_str_t *name, uint32_t *uid);
static ngx_int_t ngx_http_userid_set_uid(ngx_http_request_t *r,
ngx_http_userid_ctx_t *ctx, ngx_http_userid_conf_t *conf);
static ngx_int_t ngx_http_userid_create_uid(ngx_http_request_t *r,
ngx_http_userid_ctx_t *ctx, ngx_http_userid_conf_t *conf);
static ngx_int_t ngx_http_userid_add_variables(ngx_conf_t *cf);
static ngx_int_t ngx_http_userid_init(ngx_conf_t *cf);
static void *ngx_http_userid_create_conf(ngx_conf_t *cf);
static char *ngx_http_userid_merge_conf(ngx_conf_t *cf, void *parent,
void *child);
static char *ngx_http_userid_domain(ngx_conf_t *cf, void *post, void *data);
static char *ngx_http_userid_path(ngx_conf_t *cf, void *post, void *data);
static char *ngx_http_userid_expires(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_userid_p3p(ngx_conf_t *cf, void *post, void *data);
static char *ngx_http_userid_mark(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_int_t ngx_http_userid_init_worker(ngx_cycle_t *cycle);
static uint32_t start_value;
static uint32_t sequencer_v1 = 1;
static uint32_t sequencer_v2 = 0x03030302;
static u_char expires[] = "; expires=Thu, 31-Dec-37 23:55:55 GMT";
static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
static ngx_conf_enum_t ngx_http_userid_state[] = {
{ ngx_string("off"), NGX_HTTP_USERID_OFF },
{ ngx_string("log"), NGX_HTTP_USERID_LOG },
{ ngx_string("v1"), NGX_HTTP_USERID_V1 },
{ ngx_string("on"), NGX_HTTP_USERID_ON },
{ ngx_null_string, 0 }
};
static ngx_conf_bitmask_t ngx_http_userid_flags[] = {
{ ngx_string("off"), NGX_HTTP_USERID_COOKIE_OFF },
{ ngx_string("secure"), NGX_HTTP_USERID_COOKIE_SECURE },
{ ngx_string("httponly"), NGX_HTTP_USERID_COOKIE_HTTPONLY },
{ ngx_string("samesite=strict"),
NGX_HTTP_USERID_COOKIE_SAMESITE|NGX_HTTP_USERID_COOKIE_SAMESITE_STRICT },
{ ngx_string("samesite=lax"),
NGX_HTTP_USERID_COOKIE_SAMESITE|NGX_HTTP_USERID_COOKIE_SAMESITE_LAX },
{ ngx_string("samesite=none"),
NGX_HTTP_USERID_COOKIE_SAMESITE|NGX_HTTP_USERID_COOKIE_SAMESITE_NONE },
{ ngx_null_string, 0 }
};
static ngx_conf_post_handler_pt ngx_http_userid_domain_p =
ngx_http_userid_domain;
static ngx_conf_post_handler_pt ngx_http_userid_path_p = ngx_http_userid_path;
static ngx_conf_post_handler_pt ngx_http_userid_p3p_p = ngx_http_userid_p3p;
static ngx_command_t ngx_http_userid_commands[] = {
{ ngx_string("userid"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_enum_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, enable),
ngx_http_userid_state },
{ ngx_string("userid_service"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_num_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, service),
NULL },
{ ngx_string("userid_name"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, name),
NULL },
{ ngx_string("userid_domain"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, domain),
&ngx_http_userid_domain_p },
{ ngx_string("userid_path"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, path),
&ngx_http_userid_path_p },
{ ngx_string("userid_expires"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_http_userid_expires,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
{ ngx_string("userid_flags"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
ngx_conf_set_bitmask_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, flags),
&ngx_http_userid_flags },
{ ngx_string("userid_p3p"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_userid_conf_t, p3p),
&ngx_http_userid_p3p_p },
{ ngx_string("userid_mark"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_http_userid_mark,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_userid_filter_module_ctx = {
ngx_http_userid_add_variables, /* preconfiguration */
ngx_http_userid_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_userid_create_conf, /* create location configuration */
ngx_http_userid_merge_conf /* merge location configuration */
};
ngx_module_t ngx_http_userid_filter_module = {
NGX_MODULE_V1,
&ngx_http_userid_filter_module_ctx, /* module context */
ngx_http_userid_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
ngx_http_userid_init_worker, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_str_t ngx_http_userid_got = ngx_string("uid_got");
static ngx_str_t ngx_http_userid_set = ngx_string("uid_set");
static ngx_str_t ngx_http_userid_reset = ngx_string("uid_reset");
static ngx_uint_t ngx_http_userid_reset_index;
static ngx_int_t
ngx_http_userid_filter(ngx_http_request_t *r)
{
ngx_http_userid_ctx_t *ctx;
ngx_http_userid_conf_t *conf;
if (r != r->main) {
return ngx_http_next_header_filter(r);
}
conf = ngx_http_get_module_loc_conf(r, ngx_http_userid_filter_module);
if (conf->enable < NGX_HTTP_USERID_V1) {
return ngx_http_next_header_filter(r);
}
ctx = ngx_http_userid_get_uid(r, conf);
if (ctx == NULL) {
return NGX_ERROR;
}
if (ngx_http_userid_set_uid(r, ctx, conf) == NGX_OK) {
return ngx_http_next_header_filter(r);
}
return NGX_ERROR;
}
static ngx_int_t
ngx_http_userid_got_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_http_userid_ctx_t *ctx;
ngx_http_userid_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r->main, ngx_http_userid_filter_module);
if (conf->enable == NGX_HTTP_USERID_OFF) {
v->not_found = 1;
return NGX_OK;
}
ctx = ngx_http_userid_get_uid(r->main, conf);
if (ctx == NULL) {
return NGX_ERROR;
}
if (ctx->uid_got[3] != 0) {
return ngx_http_userid_variable(r->main, v, &conf->name, ctx->uid_got);
}
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_userid_set_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_http_userid_ctx_t *ctx;
ngx_http_userid_conf_t *conf;
conf = ngx_http_get_module_loc_conf(r->main, ngx_http_userid_filter_module);
if (conf->enable < NGX_HTTP_USERID_V1) {
v->not_found = 1;
return NGX_OK;
}
ctx = ngx_http_userid_get_uid(r->main, conf);
if (ctx == NULL) {
return NGX_ERROR;
}
if (ngx_http_userid_create_uid(r->main, ctx, conf) != NGX_OK) {
return NGX_ERROR;
}
if (ctx->uid_set[3] == 0) {
v->not_found = 1;
return NGX_OK;
}
return ngx_http_userid_variable(r->main, v, &conf->name, ctx->uid_set);
}
static ngx_http_userid_ctx_t *
ngx_http_userid_get_uid(ngx_http_request_t *r, ngx_http_userid_conf_t *conf)
{
ngx_int_t n;
ngx_str_t src, dst;
ngx_table_elt_t **cookies;
ngx_http_userid_ctx_t *ctx;
ctx = ngx_http_get_module_ctx(r, ngx_http_userid_filter_module);
if (ctx) {
return ctx;
}
if (ctx == NULL) {
ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_userid_ctx_t));
if (ctx == NULL) {
return NULL;
}
ngx_http_set_ctx(r, ctx, ngx_http_userid_filter_module);
}
n = ngx_http_parse_multi_header_lines(&r->headers_in.cookies, &conf->name,
&ctx->cookie);
if (n == NGX_DECLINED) {
return ctx;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"uid cookie: \"%V\"", &ctx->cookie);
if (ctx->cookie.len < 22) {
cookies = r->headers_in.cookies.elts;
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"client sent too short userid cookie \"%V\"",
&cookies[n]->value);
return ctx;
}
src = ctx->cookie;
/*
* we have to limit the encoded string to 22 characters because
* 1) cookie may be marked by "userid_mark",
* 2) and there are already the millions cookies with a garbage
* instead of the correct base64 trail "=="
*/
src.len = 22;
dst.data = (u_char *) ctx->uid_got;
if (ngx_decode_base64(&dst, &src) == NGX_ERROR) {
cookies = r->headers_in.cookies.elts;
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"client sent invalid userid cookie \"%V\"",
&cookies[n]->value);
return ctx;
}
ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"uid: %08XD%08XD%08XD%08XD",
ctx->uid_got[0], ctx->uid_got[1],
ctx->uid_got[2], ctx->uid_got[3]);
return ctx;
}
static ngx_int_t
ngx_http_userid_set_uid(ngx_http_request_t *r, ngx_http_userid_ctx_t *ctx,
ngx_http_userid_conf_t *conf)
{
u_char *cookie, *p;
size_t len;
ngx_str_t src, dst;
ngx_table_elt_t *set_cookie, *p3p;
if (ngx_http_userid_create_uid(r, ctx, conf) != NGX_OK) {
return NGX_ERROR;
}
if (ctx->uid_set[3] == 0) {
return NGX_OK;
}
len = conf->name.len + 1 + ngx_base64_encoded_length(16) + conf->path.len;
if (conf->expires) {
len += sizeof(expires) - 1 + 2;
}
if (conf->domain.len) {
len += conf->domain.len;
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SECURE) {
len += sizeof("; secure") - 1;
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_HTTPONLY) {
len += sizeof("; httponly") - 1;
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SAMESITE_STRICT) {
len += sizeof("; samesite=strict") - 1;
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SAMESITE_LAX) {
len += sizeof("; samesite=lax") - 1;
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SAMESITE_NONE) {
len += sizeof("; samesite=none") - 1;
}
cookie = ngx_pnalloc(r->pool, len);
if (cookie == NULL) {
return NGX_ERROR;
}
p = ngx_copy(cookie, conf->name.data, conf->name.len);
*p++ = '=';
if (ctx->uid_got[3] == 0 || ctx->reset) {
src.len = 16;
src.data = (u_char *) ctx->uid_set;
dst.data = p;
ngx_encode_base64(&dst, &src);
p += dst.len;
if (conf->mark) {
*(p - 2) = conf->mark;
}
} else {
p = ngx_cpymem(p, ctx->cookie.data, 22);
*p++ = conf->mark;
*p++ = '=';
}
if (conf->expires == NGX_HTTP_USERID_MAX_EXPIRES) {
p = ngx_cpymem(p, expires, sizeof(expires) - 1);
} else if (conf->expires) {
p = ngx_cpymem(p, expires, sizeof("; expires=") - 1);
p = ngx_http_cookie_time(p, ngx_time() + conf->expires);
}
p = ngx_copy(p, conf->domain.data, conf->domain.len);
p = ngx_copy(p, conf->path.data, conf->path.len);
if (conf->flags & NGX_HTTP_USERID_COOKIE_SECURE) {
p = ngx_cpymem(p, "; secure", sizeof("; secure") - 1);
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_HTTPONLY) {
p = ngx_cpymem(p, "; httponly", sizeof("; httponly") - 1);
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SAMESITE_STRICT) {
p = ngx_cpymem(p, "; samesite=strict", sizeof("; samesite=strict") - 1);
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SAMESITE_LAX) {
p = ngx_cpymem(p, "; samesite=lax", sizeof("; samesite=lax") - 1);
}
if (conf->flags & NGX_HTTP_USERID_COOKIE_SAMESITE_NONE) {
p = ngx_cpymem(p, "; samesite=none", sizeof("; samesite=none") - 1);
}
set_cookie = ngx_list_push(&r->headers_out.headers);
if (set_cookie == NULL) {
return NGX_ERROR;
}
set_cookie->hash = 1;
ngx_str_set(&set_cookie->key, "Set-Cookie");
set_cookie->value.len = p - cookie;
set_cookie->value.data = cookie;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"uid cookie: \"%V\"", &set_cookie->value);
if (conf->p3p.len == 0) {
return NGX_OK;
}
p3p = ngx_list_push(&r->headers_out.headers);
if (p3p == NULL) {
return NGX_ERROR;
}
p3p->hash = 1;
ngx_str_set(&p3p->key, "P3P");
p3p->value = conf->p3p;
return NGX_OK;
}
static ngx_int_t
ngx_http_userid_create_uid(ngx_http_request_t *r, ngx_http_userid_ctx_t *ctx,
ngx_http_userid_conf_t *conf)
{
ngx_connection_t *c;
struct sockaddr_in *sin;
ngx_http_variable_value_t *vv;
#if (NGX_HAVE_INET6)
u_char *p;
struct sockaddr_in6 *sin6;
#endif
if (ctx->uid_set[3] != 0) {
return NGX_OK;
}
if (ctx->uid_got[3] != 0) {
vv = ngx_http_get_indexed_variable(r, ngx_http_userid_reset_index);
if (vv == NULL || vv->not_found) {
return NGX_ERROR;
}
if (vv->len == 0 || (vv->len == 1 && vv->data[0] == '0')) {
if (conf->mark == '\0'
|| (ctx->cookie.len > 23
&& ctx->cookie.data[22] == conf->mark
&& ctx->cookie.data[23] == '='))
{
return NGX_OK;
}
ctx->uid_set[0] = ctx->uid_got[0];
ctx->uid_set[1] = ctx->uid_got[1];
ctx->uid_set[2] = ctx->uid_got[2];
ctx->uid_set[3] = ctx->uid_got[3];
return NGX_OK;
} else {
ctx->reset = 1;
if (vv->len == 3 && ngx_strncmp(vv->data, "log", 3) == 0) {
ngx_log_error(NGX_LOG_NOTICE, r->connection->log, 0,
"userid cookie \"%V=%08XD%08XD%08XD%08XD\" was reset",
&conf->name, ctx->uid_got[0], ctx->uid_got[1],
ctx->uid_got[2], ctx->uid_got[3]);
}
}
}
/*
* TODO: in the threaded mode the sequencers should be in TLS and their
* ranges should be divided between threads
*/
if (conf->enable == NGX_HTTP_USERID_V1) {
if (conf->service == NGX_CONF_UNSET) {
ctx->uid_set[0] = 0;
} else {
ctx->uid_set[0] = conf->service;
}
ctx->uid_set[1] = (uint32_t) ngx_time();
ctx->uid_set[2] = start_value;
ctx->uid_set[3] = sequencer_v1;
sequencer_v1 += 0x100;
} else {
if (conf->service == NGX_CONF_UNSET) {
c = r->connection;
if (ngx_connection_local_sockaddr(c, NULL, 0) != NGX_OK) {
return NGX_ERROR;
}
switch (c->local_sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) c->local_sockaddr;
p = (u_char *) &ctx->uid_set[0];
*p++ = sin6->sin6_addr.s6_addr[12];
*p++ = sin6->sin6_addr.s6_addr[13];
*p++ = sin6->sin6_addr.s6_addr[14];
*p = sin6->sin6_addr.s6_addr[15];
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
ctx->uid_set[0] = 0;
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) c->local_sockaddr;
ctx->uid_set[0] = sin->sin_addr.s_addr;
break;
}
} else {
ctx->uid_set[0] = htonl(conf->service);
}
ctx->uid_set[1] = htonl((uint32_t) ngx_time());
ctx->uid_set[2] = htonl(start_value);
ctx->uid_set[3] = htonl(sequencer_v2);
sequencer_v2 += 0x100;
if (sequencer_v2 < 0x03030302) {
sequencer_v2 = 0x03030302;
}
}
return NGX_OK;
}
static ngx_int_t
ngx_http_userid_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
ngx_str_t *name, uint32_t *uid)
{
v->len = name->len + sizeof("=00001111222233334444555566667777") - 1;
v->data = ngx_pnalloc(r->pool, v->len);
if (v->data == NULL) {
return NGX_ERROR;
}
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
ngx_sprintf(v->data, "%V=%08XD%08XD%08XD%08XD",
name, uid[0], uid[1], uid[2], uid[3]);
return NGX_OK;
}
static ngx_int_t
ngx_http_userid_reset_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
*v = ngx_http_variable_null_value;
return NGX_OK;
}
static ngx_int_t
ngx_http_userid_add_variables(ngx_conf_t *cf)
{
ngx_int_t n;
ngx_http_variable_t *var;
var = ngx_http_add_variable(cf, &ngx_http_userid_got, 0);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = ngx_http_userid_got_variable;
var = ngx_http_add_variable(cf, &ngx_http_userid_set, 0);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = ngx_http_userid_set_variable;
var = ngx_http_add_variable(cf, &ngx_http_userid_reset,
NGX_HTTP_VAR_CHANGEABLE);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = ngx_http_userid_reset_variable;
n = ngx_http_get_variable_index(cf, &ngx_http_userid_reset);
if (n == NGX_ERROR) {
return NGX_ERROR;
}
ngx_http_userid_reset_index = n;
return NGX_OK;
}
static void *
ngx_http_userid_create_conf(ngx_conf_t *cf)
{
ngx_http_userid_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_userid_conf_t));
if (conf == NULL) {
return NULL;
}
/*
* set by ngx_pcalloc():
*
* conf->flags = 0;
* conf->name = { 0, NULL };
* conf->domain = { 0, NULL };
* conf->path = { 0, NULL };
* conf->p3p = { 0, NULL };
*/
conf->enable = NGX_CONF_UNSET_UINT;
conf->service = NGX_CONF_UNSET;
conf->expires = NGX_CONF_UNSET;
conf->mark = (u_char) '\xFF';
return conf;
}
static char *
ngx_http_userid_merge_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_userid_conf_t *prev = parent;
ngx_http_userid_conf_t *conf = child;
ngx_conf_merge_uint_value(conf->enable, prev->enable,
NGX_HTTP_USERID_OFF);
ngx_conf_merge_bitmask_value(conf->flags, prev->flags,
(NGX_CONF_BITMASK_SET|NGX_HTTP_USERID_COOKIE_OFF));
ngx_conf_merge_str_value(conf->name, prev->name, "uid");
ngx_conf_merge_str_value(conf->domain, prev->domain, "");
ngx_conf_merge_str_value(conf->path, prev->path, "; path=/");
ngx_conf_merge_str_value(conf->p3p, prev->p3p, "");
ngx_conf_merge_value(conf->service, prev->service, NGX_CONF_UNSET);
ngx_conf_merge_sec_value(conf->expires, prev->expires, 0);
if (conf->mark == (u_char) '\xFF') {
if (prev->mark == (u_char) '\xFF') {
conf->mark = '\0';
} else {
conf->mark = prev->mark;
}
}
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_userid_init(ngx_conf_t *cf)
{
ngx_http_next_header_filter = ngx_http_top_header_filter;
ngx_http_top_header_filter = ngx_http_userid_filter;
return NGX_OK;
}
static char *
ngx_http_userid_domain(ngx_conf_t *cf, void *post, void *data)
{
ngx_str_t *domain = data;
u_char *p, *new;
if (ngx_strcmp(domain->data, "none") == 0) {
ngx_str_set(domain, "");
return NGX_CONF_OK;
}
new = ngx_pnalloc(cf->pool, sizeof("; domain=") - 1 + domain->len);
if (new == NULL) {
return NGX_CONF_ERROR;
}
p = ngx_cpymem(new, "; domain=", sizeof("; domain=") - 1);
ngx_memcpy(p, domain->data, domain->len);
domain->len += sizeof("; domain=") - 1;
domain->data = new;
return NGX_CONF_OK;
}
static char *
ngx_http_userid_path(ngx_conf_t *cf, void *post, void *data)
{
ngx_str_t *path = data;
u_char *p, *new;
new = ngx_pnalloc(cf->pool, sizeof("; path=") - 1 + path->len);
if (new == NULL) {
return NGX_CONF_ERROR;
}
p = ngx_cpymem(new, "; path=", sizeof("; path=") - 1);
ngx_memcpy(p, path->data, path->len);
path->len += sizeof("; path=") - 1;
path->data = new;
return NGX_CONF_OK;
}
static char *
ngx_http_userid_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_userid_conf_t *ucf = conf;
ngx_str_t *value;
if (ucf->expires != NGX_CONF_UNSET) {
return "is duplicate";
}
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "max") == 0) {
ucf->expires = NGX_HTTP_USERID_MAX_EXPIRES;
return NGX_CONF_OK;
}
if (ngx_strcmp(value[1].data, "off") == 0) {
ucf->expires = 0;
return NGX_CONF_OK;
}
ucf->expires = ngx_parse_time(&value[1], 1);
if (ucf->expires == (time_t) NGX_ERROR) {
return "invalid value";
}
return NGX_CONF_OK;
}
static char *
ngx_http_userid_p3p(ngx_conf_t *cf, void *post, void *data)
{
ngx_str_t *p3p = data;
if (ngx_strcmp(p3p->data, "none") == 0) {
ngx_str_set(p3p, "");
}
return NGX_CONF_OK;
}
static char *
ngx_http_userid_mark(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_userid_conf_t *ucf = conf;
ngx_str_t *value;
if (ucf->mark != (u_char) '\xFF') {
return "is duplicate";
}
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "off") == 0) {
ucf->mark = '\0';
return NGX_CONF_OK;
}
if (value[1].len != 1
|| !((value[1].data[0] >= '0' && value[1].data[0] <= '9')
|| (value[1].data[0] >= 'A' && value[1].data[0] <= 'Z')
|| (value[1].data[0] >= 'a' && value[1].data[0] <= 'z')
|| value[1].data[0] == '='))
{
return "value must be \"off\" or a single letter, digit or \"=\"";
}
ucf->mark = value[1].data[0];
return NGX_CONF_OK;
}
static ngx_int_t
ngx_http_userid_init_worker(ngx_cycle_t *cycle)
{
struct timeval tp;
ngx_gettimeofday(&tp);
/* use the most significant usec part that fits to 16 bits */
start_value = (((uint32_t) tp.tv_usec / 20) << 16) | ngx_pid;
return NGX_OK;
}