#include "first.h" #include "base.h" #include "plugin.h" #include "log.h" #include "stat_cache.h" #include <stdlib.h> #include <string.h> #include <errno.h> typedef struct { /* unparsed pieces */ buffer *path_pieces_raw; /* pieces for path creation */ size_t len; buffer **path_pieces; } plugin_config; typedef struct { PLUGIN_DATA; buffer *tmp_buf; plugin_config **config_storage; plugin_config conf; } plugin_data; INIT_FUNC(mod_evhost_init) { plugin_data *p; p = calloc(1, sizeof(*p)); p->tmp_buf = buffer_init(); return p; } FREE_FUNC(mod_evhost_free) { plugin_data *p = p_d; UNUSED(srv); if (!p) return HANDLER_GO_ON; if (p->config_storage) { size_t i; for (i = 0; i < srv->config_context->used; i++) { plugin_config *s = p->config_storage[i]; if (NULL == s) continue; if(s->path_pieces) { size_t j; for (j = 0; j < s->len; j++) { buffer_free(s->path_pieces[j]); } free(s->path_pieces); } buffer_free(s->path_pieces_raw); free(s); } free(p->config_storage); } buffer_free(p->tmp_buf); free(p); return HANDLER_GO_ON; } static int mod_evhost_parse_pattern(plugin_config *s) { char *ptr = s->path_pieces_raw->ptr,*pos; s->path_pieces = NULL; for(pos=ptr;*ptr;ptr++) { if(*ptr == '%') { size_t len; s->path_pieces = realloc(s->path_pieces,(s->len+2) * sizeof(*s->path_pieces)); s->path_pieces[s->len] = buffer_init(); s->path_pieces[s->len+1] = buffer_init(); /* "%%" "%_" "%x" "%{x.y}" where x and y are *single digit* 0 - 9 */ if (ptr[1] == '%' || ptr[1] == '_' || light_isdigit(ptr[1])) { len = 2; } else if (ptr[1] == '{') { if (!light_isdigit(ptr[2])) return -1; if (ptr[3] == '.') { if (!light_isdigit(ptr[4])) return -1; if (ptr[5] != '}') return -1; len = 6; } else if (ptr[3] == '}') { len = 4; } else { return -1; } } else { return -1; } buffer_copy_string_len(s->path_pieces[s->len],pos,ptr-pos); pos = ptr + len; buffer_copy_string_len(s->path_pieces[s->len+1],ptr,len); ptr += len - 1; /*(ptr++ in for() loop)*/ s->len += 2; } } if(*pos != '\0') { s->path_pieces = realloc(s->path_pieces,(s->len+1) * sizeof(*s->path_pieces)); s->path_pieces[s->len] = buffer_init(); buffer_copy_string_len(s->path_pieces[s->len],pos,ptr-pos); s->len += 1; } return 0; } SETDEFAULTS_FUNC(mod_evhost_set_defaults) { plugin_data *p = p_d; size_t i; /** * * # * # define a pattern for the host url finding * # %% => % sign * # %0 => domain name + tld * # %1 => tld * # %2 => domain name without tld * # %3 => subdomain 1 name * # %4 => subdomain 2 name * # %_ => fqdn (without port info) * # * evhost.path-pattern = "/home/ckruse/dev/www/%3/htdocs/" * */ config_values_t cv[] = { { "evhost.path-pattern", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET } }; if (!p) return HANDLER_ERROR; p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *)); for (i = 0; i < srv->config_context->used; i++) { data_config const* config = (data_config const*)srv->config_context->data[i]; plugin_config *s; s = calloc(1, sizeof(plugin_config)); s->path_pieces_raw = buffer_init(); s->path_pieces = NULL; s->len = 0; cv[0].destination = s->path_pieces_raw; p->config_storage[i] = s; if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) { return HANDLER_ERROR; } if (!buffer_string_is_empty(s->path_pieces_raw)) { if (0 != mod_evhost_parse_pattern(s)) { log_error_write(srv, __FILE__, __LINE__, "sb", "invalid evhost.path-pattern:", s->path_pieces_raw); return HANDLER_ERROR; } } } return HANDLER_GO_ON; } /** * assign the different parts of the domain to array-indezes (sub2.sub1.domain.tld) * - %0 - domain.tld * - %1 - tld * - %2 - domain * - %3 - sub1 * - ... */ static void mod_evhost_parse_host(buffer *key, array *host, buffer *authority) { char *ptr = authority->ptr + buffer_string_length(authority); char *colon = ptr; /* needed to filter out the colon (if exists) */ int first = 1; int i; /* first, find the domain + tld */ for(; ptr > authority->ptr; --ptr) { if(*ptr == '.') { if(first) first = 0; else break; } else if(*ptr == ':') { colon = ptr; first = 1; } } /* if we stopped at a dot, skip the dot */ if (*ptr == '.') ptr++; array_insert_key_value(host, CONST_STR_LEN("%0"), ptr, colon-ptr); /* if the : is not the start of the authority, go on parsing the hostname */ if (colon != authority->ptr) { for(ptr = colon - 1, i = 1; ptr > authority->ptr; --ptr) { if(*ptr == '.') { if (ptr != colon - 1) { /* is something between the dots */ buffer_copy_string_len(key, CONST_STR_LEN("%")); buffer_append_int(key, i++); array_insert_key_value(host, CONST_BUF_LEN(key), ptr+1, colon-ptr-1); } colon = ptr; } } /* if the . is not the first charactor of the hostname */ if (colon != ptr) { buffer_copy_string_len(key, CONST_STR_LEN("%")); buffer_append_int(key, i /* ++ */); array_insert_key_value(host, CONST_BUF_LEN(key), ptr, colon-ptr); } } } #define PATCH(x) \ p->conf.x = s->x; static int mod_evhost_patch_connection(server *srv, connection *con, plugin_data *p) { size_t i, j; plugin_config *s = p->config_storage[0]; PATCH(path_pieces); PATCH(len); /* skip the first, the global context */ for (i = 1; i < srv->config_context->used; i++) { data_config *dc = (data_config *)srv->config_context->data[i]; s = p->config_storage[i]; /* condition didn't match */ if (!config_check_cond(srv, con, dc)) continue; /* merge config */ for (j = 0; j < dc->value->used; j++) { data_unset *du = dc->value->data[j]; if (buffer_is_equal_string(du->key, CONST_STR_LEN("evhost.path-pattern"))) { PATCH(path_pieces); PATCH(len); } } } return 0; } #undef PATCH static void mod_evhost_build_doc_root_path(buffer *b, array *parsed_host, buffer *authority, buffer **path_pieces, const size_t npieces) { array_reset_data_strings(parsed_host); mod_evhost_parse_host(b, parsed_host, authority); buffer_clear(b); for (size_t i = 0; i < npieces; ++i) { const char *ptr = path_pieces[i]->ptr; if (*ptr == '%') { data_string *ds; if (*(ptr+1) == '%') { /* %% */ buffer_append_string_len(b, CONST_STR_LEN("%")); } else if (*(ptr+1) == '_' ) { /* %_ == full hostname */ char *colon = strchr(authority->ptr, ':'); if(colon == NULL) { buffer_append_string_buffer(b, authority); /* adds fqdn */ } else { /* strip the port out of the authority-part of the URI scheme */ buffer_append_string_len(b, authority->ptr, colon - authority->ptr); /* adds fqdn */ } } else if (ptr[1] == '{' ) { char s[3] = "% "; s[1] = ptr[2]; /*(assumes single digit before '.', and, optionally, '.' and single digit after '.')*/ if (NULL != (ds = (data_string *)array_get_element_klen(parsed_host, s, 2))) { if (ptr[3] != '.' || ptr[4] == '0') { buffer_append_string_buffer(b, ds->value); } else { if ((size_t)(ptr[4]-'0') <= buffer_string_length(ds->value)) { buffer_append_string_len(b, ds->value->ptr+(ptr[4]-'0')-1, 1); } } } else { /* unhandled %-sequence */ } } else if (NULL != (ds = (data_string *)array_get_element_klen(parsed_host, CONST_BUF_LEN(path_pieces[i])))) { buffer_append_string_buffer(b, ds->value); } else { /* unhandled %-sequence */ } } else { buffer_append_string_buffer(b, path_pieces[i]); } } buffer_append_slash(b); } static handler_t mod_evhost_uri_handler(server *srv, connection *con, void *p_d) { plugin_data *p = p_d; stat_cache_entry *sce = NULL; /* not authority set */ if (buffer_string_is_empty(con->uri.authority)) return HANDLER_GO_ON; mod_evhost_patch_connection(srv, con, p); /* missing even default(global) conf */ if (0 == p->conf.len) { return HANDLER_GO_ON; } mod_evhost_build_doc_root_path(p->tmp_buf, srv->split_vals, con->uri.authority, p->conf.path_pieces, p->conf.len); if (HANDLER_ERROR == stat_cache_get_entry(srv, con, p->tmp_buf, &sce)) { log_error_write(srv, __FILE__, __LINE__, "sb", strerror(errno), p->tmp_buf); } else if(!S_ISDIR(sce->st.st_mode)) { log_error_write(srv, __FILE__, __LINE__, "sb", "not a directory:", p->tmp_buf); } else { buffer_copy_buffer(con->physical.doc_root, p->tmp_buf); } return HANDLER_GO_ON; } int mod_evhost_plugin_init(plugin *p); int mod_evhost_plugin_init(plugin *p) { p->version = LIGHTTPD_VERSION_ID; p->name = buffer_init_string("evhost"); p->init = mod_evhost_init; p->set_defaults = mod_evhost_set_defaults; p->handle_docroot = mod_evhost_uri_handler; p->cleanup = mod_evhost_free; p->data = NULL; return 0; } /* eof */

↑ V522 There might be dereferencing of a potential null pointer 'p'. Check lines: 34, 32.

↑ V522 There might be dereferencing of a potential null pointer 's->path_pieces'. Check lines: 85, 84.

↑ V701 realloc() possible leak: when realloc() fails in allocating memory, original pointer 's->path_pieces' is lost. Consider assigning realloc() to a temporary pointer.

↑ V522 There might be dereferencing of a potential null pointer 's'. Check lines: 162, 161.

↑ V522 There might be dereferencing of a potential null pointer 'p->config_storage'. Check lines: 168, 155.