#include "base.h" #include "buffer.h" #include "array.h" #include "log.h" #include "plugin.h" #include "configfile.h" #include #include /** * like all glue code this file contains functions which * are the external interface of lighttpd. The functions * are used by the server itself and the plugins. * * The main-goal is to have a small library in the end * which is linked against both and which will define * the interface itself in the end. * */ /* handle global options */ /* parse config array */ int config_insert_values_internal(server *srv, array *ca, const config_values_t cv[]) { size_t i; data_unset *du; for (i = 0; cv[i].key; i++) { if (NULL == (du = array_get_element(ca, cv[i].key))) { /* no found */ continue; } switch (cv[i].type) { case T_CONFIG_ARRAY: if (du->type == TYPE_ARRAY) { size_t j; data_array *da = (data_array *)du; for (j = 0; j < da->value->used; j++) { if (da->value->data[j]->type == TYPE_STRING) { data_string *ds = data_string_init(); buffer_copy_string_buffer(ds->value, ((data_string *)(da->value->data[j]))->value); if (!da->is_index_key) { /* the id's were generated automaticly, as we copy now we might have to renumber them * this is used to prepend server.modules by mod_indexfile as it has to be loaded * before mod_fastcgi and friends */ buffer_copy_string_buffer(ds->key, ((data_string *)(da->value->data[j]))->key); } array_insert_unique(cv[i].destination, (data_unset *)ds); } else { log_error_write(srv, __FILE__, __LINE__, "sssd", "the key of an array can only be a string or a integer, variable:", cv[i].key, "type:", da->value->data[j]->type); return -1; } } } else { log_error_write(srv, __FILE__, __LINE__, "ss", cv[i].key, "should have been a array of strings like ... = ( \"...\" )"); return -1; } break; case T_CONFIG_STRING: if (du->type == TYPE_STRING) { data_string *ds = (data_string *)du; buffer_copy_string_buffer(cv[i].destination, ds->value); } else { log_error_write(srv, __FILE__, __LINE__, "ssss", cv[i].key, "should have been a string like ... = \"...\""); return -1; } break; case T_CONFIG_SHORT: switch(du->type) { case TYPE_INTEGER: { data_integer *di = (data_integer *)du; *((unsigned short *)(cv[i].destination)) = di->value; break; } case TYPE_STRING: { data_string *ds = (data_string *)du; /* If the value came from an environment variable, then it is a * data_string, although it may contain a number in ASCII * decimal format. We try to interpret the string as a decimal * short before giving up, in order to support setting numeric * values with environment variables (eg, port number). */ if (ds->value->ptr && *ds->value->ptr) { char *e; long l = strtol(ds->value->ptr, &e, 10); if (e != ds->value->ptr && !*e && l >=0 && l <= 65535) { *((unsigned short *)(cv[i].destination)) = l; break; } } log_error_write(srv, __FILE__, __LINE__, "ssb", "got a string but expected a short:", cv[i].key, ds->value); return -1; } default: log_error_write(srv, __FILE__, __LINE__, "ssds", "unexpected type for key:", cv[i].key, du->type, "expected a short integer, range 0 ... 65535"); return -1; } break; case T_CONFIG_INT: switch(du->type) { case TYPE_INTEGER: { data_integer *di = (data_integer *)du; *((unsigned int *)(cv[i].destination)) = di->value; break; } case TYPE_STRING: { data_string *ds = (data_string *)du; if (ds->value->ptr && *ds->value->ptr) { char *e; long l = strtol(ds->value->ptr, &e, 10); if (e != ds->value->ptr && !*e && l >= 0) { *((unsigned int *)(cv[i].destination)) = l; break; } } log_error_write(srv, __FILE__, __LINE__, "ssb", "got a string but expected an integer:", cv[i].key, ds->value); return -1; } default: log_error_write(srv, __FILE__, __LINE__, "ssds", "unexpected type for key:", cv[i].key, du->type, "expected an integer, range 0 ... 4294967295"); return -1; } break; case T_CONFIG_BOOLEAN: if (du->type == TYPE_STRING) { data_string *ds = (data_string *)du; if (buffer_is_equal_string(ds->value, CONST_STR_LEN("enable"))) { *((unsigned short *)(cv[i].destination)) = 1; } else if (buffer_is_equal_string(ds->value, CONST_STR_LEN("disable"))) { *((unsigned short *)(cv[i].destination)) = 0; } else { log_error_write(srv, __FILE__, __LINE__, "ssbs", "ERROR: unexpected value for key:", cv[i].key, ds->value, "(enable|disable)"); return -1; } } else { log_error_write(srv, __FILE__, __LINE__, "ssss", "ERROR: unexpected type for key:", cv[i].key, "(string)", "\"(enable|disable)\""); return -1; } break; case T_CONFIG_LOCAL: case T_CONFIG_UNSET: break; case T_CONFIG_UNSUPPORTED: log_error_write(srv, __FILE__, __LINE__, "ssss", "ERROR: found unsupported key:", cv[i].key, "-", (char *)(cv[i].destination)); srv->config_unsupported = 1; break; case T_CONFIG_DEPRECATED: log_error_write(srv, __FILE__, __LINE__, "ssss", "ERROR: found deprecated key:", cv[i].key, "-", (char *)(cv[i].destination)); srv->config_deprecated = 1; break; } } return 0; } int config_insert_values_global(server *srv, array *ca, const config_values_t cv[]) { size_t i; data_unset *du; for (i = 0; cv[i].key; i++) { data_string *touched; if (NULL == (du = array_get_element(ca, cv[i].key))) { /* no found */ continue; } /* touched */ touched = data_string_init(); buffer_copy_string_len(touched->value, CONST_STR_LEN("")); buffer_copy_string_buffer(touched->key, du->key); array_insert_unique(srv->config_touched, (data_unset *)touched); } return config_insert_values_internal(srv, ca, cv); } static unsigned short sock_addr_get_port(sock_addr *addr) { #ifdef HAVE_IPV6 return ntohs(addr->plain.sa_family ? addr->ipv6.sin6_port : addr->ipv4.sin_port); #else return ntohs(addr->ipv4.sin_port); #endif } static cond_result_t config_check_cond_cached(server *srv, connection *con, data_config *dc); static cond_result_t config_check_cond_nocache(server *srv, connection *con, data_config *dc) { buffer *l; server_socket *srv_sock = con->srv_socket; /* check parent first */ if (dc->parent && dc->parent->context_ndx) { /** * a nested conditional * * if the parent is not decided yet or false, we can't be true either */ if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "sb", "go parent", dc->parent->key); } switch (config_check_cond_cached(srv, con, dc->parent)) { case COND_RESULT_FALSE: return COND_RESULT_FALSE; case COND_RESULT_UNSET: return COND_RESULT_UNSET; default: break; } } if (dc->prev) { /** * a else branch * * we can only be executed, if all of our previous brothers * are false */ if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "sb", "go prev", dc->prev->key); } /* make sure prev is checked first */ config_check_cond_cached(srv, con, dc->prev); /* one of prev set me to FALSE */ switch (con->cond_cache[dc->context_ndx].result) { case COND_RESULT_FALSE: return con->cond_cache[dc->context_ndx].result; default: break; } } if (!con->conditional_is_valid[dc->comp]) { if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "dss", dc->comp, dc->key->ptr, con->conditional_is_valid[dc->comp] ? "yeah" : "nej"); } return COND_RESULT_UNSET; } /* pass the rules */ switch (dc->comp) { case COMP_HTTP_HOST: { char *ck_colon = NULL, *val_colon = NULL; if (!buffer_is_empty(con->uri.authority)) { /* * append server-port to the HTTP_POST if necessary */ l = con->uri.authority; switch(dc->cond) { case CONFIG_COND_NE: case CONFIG_COND_EQ: ck_colon = strchr(dc->string->ptr, ':'); val_colon = strchr(l->ptr, ':'); if (ck_colon == val_colon) { /* nothing to do with it */ break; } if (ck_colon) { /* condition "host:port" but client send "host" */ buffer_copy_string_buffer(srv->cond_check_buf, l); buffer_append_string_len(srv->cond_check_buf, CONST_STR_LEN(":")); buffer_append_long(srv->cond_check_buf, sock_addr_get_port(&(srv_sock->addr))); l = srv->cond_check_buf; } else if (!ck_colon) { /* condition "host" but client send "host:port" */ buffer_copy_string_len(srv->cond_check_buf, l->ptr, val_colon - l->ptr); l = srv->cond_check_buf; } break; default: break; } #if defined USE_OPENSSL && ! defined OPENSSL_NO_TLSEXT } else if (!buffer_is_empty(con->tlsext_server_name)) { l = con->tlsext_server_name; #endif } else { l = srv->empty_string; } break; } case COMP_HTTP_REMOTE_IP: { char *nm_slash; /* handle remoteip limitations * * "10.0.0.1" is provided for all comparisions * * only for == and != we support * * "10.0.0.1/24" */ if ((dc->cond == CONFIG_COND_EQ || dc->cond == CONFIG_COND_NE) && (con->dst_addr.plain.sa_family == AF_INET) && (NULL != (nm_slash = strchr(dc->string->ptr, '/')))) { int nm_bits; long nm; char *err; struct in_addr val_inp; if (*(nm_slash+1) == '\0') { log_error_write(srv, __FILE__, __LINE__, "sb", "ERROR: no number after / ", dc->string); return COND_RESULT_FALSE; } nm_bits = strtol(nm_slash + 1, &err, 10); if (*err) { log_error_write(srv, __FILE__, __LINE__, "sbs", "ERROR: non-digit found in netmask:", dc->string, err); return COND_RESULT_FALSE; } /* take IP convert to the native */ buffer_copy_string_len(srv->cond_check_buf, dc->string->ptr, nm_slash - dc->string->ptr); #ifdef __WIN32 if (INADDR_NONE == (val_inp.s_addr = inet_addr(srv->cond_check_buf->ptr))) { log_error_write(srv, __FILE__, __LINE__, "sb", "ERROR: ip addr is invalid:", srv->cond_check_buf); return COND_RESULT_FALSE; } #else if (0 == inet_aton(srv->cond_check_buf->ptr, &val_inp)) { log_error_write(srv, __FILE__, __LINE__, "sb", "ERROR: ip addr is invalid:", srv->cond_check_buf); return COND_RESULT_FALSE; } #endif /* build netmask */ nm = htonl(~((1 << (32 - nm_bits)) - 1)); if ((val_inp.s_addr & nm) == (con->dst_addr.ipv4.sin_addr.s_addr & nm)) { return (dc->cond == CONFIG_COND_EQ) ? COND_RESULT_TRUE : COND_RESULT_FALSE; } else { return (dc->cond == CONFIG_COND_EQ) ? COND_RESULT_FALSE : COND_RESULT_TRUE; } } else { l = con->dst_addr_buf; } break; } case COMP_HTTP_SCHEME: l = con->uri.scheme; break; case COMP_HTTP_URL: l = con->uri.path; break; case COMP_HTTP_QUERY_STRING: l = con->uri.query; break; case COMP_SERVER_SOCKET: l = srv_sock->srv_token; break; case COMP_HTTP_REFERER: { data_string *ds; if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "Referer"))) { l = ds->value; } else { l = srv->empty_string; } break; } case COMP_HTTP_COOKIE: { data_string *ds; if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "Cookie"))) { l = ds->value; } else { l = srv->empty_string; } break; } case COMP_HTTP_USER_AGENT: { data_string *ds; if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "User-Agent"))) { l = ds->value; } else { l = srv->empty_string; } break; } case COMP_HTTP_REQUEST_METHOD: { const char *method = get_http_method_name(con->request.http_method); /* we only have the request method as const char but we need a buffer for comparing */ buffer_copy_string(srv->tmp_buf, method); l = srv->tmp_buf; break; } case COMP_HTTP_LANGUAGE: { data_string *ds; if (NULL != (ds = (data_string *)array_get_element(con->request.headers, "Accept-Language"))) { l = ds->value; } else { l = srv->empty_string; } break; } default: return COND_RESULT_FALSE; } if (NULL == l) { if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "bsbs", dc->comp_key, "(", l, ") compare to NULL"); } return COND_RESULT_FALSE; } if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "bsbsb", dc->comp_key, "(", l, ") compare to ", dc->string); } switch(dc->cond) { case CONFIG_COND_NE: case CONFIG_COND_EQ: if (buffer_is_equal(l, dc->string)) { return (dc->cond == CONFIG_COND_EQ) ? COND_RESULT_TRUE : COND_RESULT_FALSE; } else { return (dc->cond == CONFIG_COND_EQ) ? COND_RESULT_FALSE : COND_RESULT_TRUE; } break; #ifdef HAVE_PCRE_H case CONFIG_COND_NOMATCH: case CONFIG_COND_MATCH: { cond_cache_t *cache = &con->cond_cache[dc->context_ndx]; int n; #ifndef elementsof #define elementsof(x) (sizeof(x) / sizeof(x[0])) #endif n = pcre_exec(dc->regex, dc->regex_study, l->ptr, l->used - 1, 0, 0, cache->matches, elementsof(cache->matches)); cache->patterncount = n; if (n > 0) { cache->comp_value = l; cache->comp_type = dc->comp; return (dc->cond == CONFIG_COND_MATCH) ? COND_RESULT_TRUE : COND_RESULT_FALSE; } else { /* cache is already cleared */ return (dc->cond == CONFIG_COND_MATCH) ? COND_RESULT_FALSE : COND_RESULT_TRUE; } break; } #endif default: /* no way */ break; } return COND_RESULT_FALSE; } static cond_result_t config_check_cond_cached(server *srv, connection *con, data_config *dc) { cond_cache_t *caches = con->cond_cache; if (COND_RESULT_UNSET == caches[dc->context_ndx].result) { if (COND_RESULT_TRUE == (caches[dc->context_ndx].result = config_check_cond_nocache(srv, con, dc))) { if (dc->next) { data_config *c; if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "s", "setting remains of chaining to false"); } for (c = dc->next; c; c = c->next) { caches[c->context_ndx].result = COND_RESULT_FALSE; } } } caches[dc->context_ndx].comp_type = dc->comp; if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "dss", dc->context_ndx, "(uncached) result:", caches[dc->context_ndx].result == COND_RESULT_UNSET ? "unknown" : (caches[dc->context_ndx].result == COND_RESULT_TRUE ? "true" : "false")); } } else { if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "dss", dc->context_ndx, "(cached) result:", caches[dc->context_ndx].result == COND_RESULT_UNSET ? "unknown" : (caches[dc->context_ndx].result == COND_RESULT_TRUE ? "true" : "false")); } } return caches[dc->context_ndx].result; } /** * reset the config-cache for a named item * * if the item is COND_LAST_ELEMENT we reset all items */ void config_cond_cache_reset_item(server *srv, connection *con, comp_key_t item) { size_t i; for (i = 0; i < srv->config_context->used; i++) { if (item == COMP_LAST_ELEMENT || con->cond_cache[i].comp_type == item) { con->cond_cache[i].result = COND_RESULT_UNSET; con->cond_cache[i].patterncount = 0; con->cond_cache[i].comp_value = NULL; } } } /** * reset the config cache to its initial state at connection start */ void config_cond_cache_reset(server *srv, connection *con) { size_t i; config_cond_cache_reset_all_items(srv, con); for (i = 0; i < COMP_LAST_ELEMENT; i++) { con->conditional_is_valid[i] = 0; } } int config_check_cond(server *srv, connection *con, data_config *dc) { if (con->conf.log_condition_handling) { log_error_write(srv, __FILE__, __LINE__, "s", "=== start of condition block ==="); } return (config_check_cond_cached(srv, con, dc) == COND_RESULT_TRUE); } int config_append_cond_match_buffer(connection *con, data_config *dc, buffer *buf, int n) { cond_cache_t *cache = &con->cond_cache[dc->context_ndx]; if (n >= cache->patterncount) { return 0; } n <<= 1; /* n *= 2 */ buffer_append_string_len(buf, cache->comp_value->ptr + cache->matches[n], cache->matches[n + 1] - cache->matches[n]); return 1; }