diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_userid_filter_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_userid_filter_module.c | 842 |
1 files changed, 842 insertions, 0 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_userid_filter_module.c b/app/nginx/src/http/modules/ngx_http_userid_filter_module.c new file mode 100644 index 0000000..0dbacba --- /dev/null +++ b/app/nginx/src/http/modules/ngx_http_userid_filter_module.c @@ -0,0 +1,842 @@ + +/* + * 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 + +/* 31 Dec 2037 23:55:55 GMT */ +#define NGX_HTTP_USERID_MAX_EXPIRES 2145916555 + + +typedef struct { + ngx_uint_t enable; + + 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_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_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; + } + + 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); + + 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->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 + 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->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_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; +} |