diff --unified --recursive --text --new-file --color pidgin-2.14.5.old/ChangeLog pidgin-2.14.5.new/ChangeLog --- pidgin-2.14.5.old/ChangeLog 2021-06-24 14:17:08.444727946 +0800 +++ pidgin-2.14.5.new/ChangeLog 2021-06-24 14:17:17.098045115 +0800 @@ -103,6 +103,10 @@ Bonjour: * Always use port fallback for IPv4 addresses. (PR #382 Michael Osborne) + libpurple: + * added support for the no_proxy environment variable. (PIDGIN-17518) + (RR #667) (Alynx Zhou and Gary Kramlich) + XMPP: * Support for XEP-0198 Stream Management (PR #309 defanor) * Decrease delay for file transfer using streamhosts (PR #464 #627 Evert diff --unified --recursive --text --new-file --color pidgin-2.14.5.old/COPYRIGHT pidgin-2.14.5.new/COPYRIGHT --- pidgin-2.14.5.old/COPYRIGHT 2021-06-24 14:17:08.438061292 +0800 +++ pidgin-2.14.5.new/COPYRIGHT 2021-06-24 14:17:17.098045115 +0800 @@ -651,6 +651,7 @@ Jan Zachorowski zelch Nickolai Zeldovich +Alynx Zhou Tom Zickel Marco Ziech Piotr Zielinski diff --unified --recursive --text --new-file --color pidgin-2.14.5.old/libpurple/proxy.c pidgin-2.14.5.new/libpurple/proxy.c --- pidgin-2.14.5.old/libpurple/proxy.c 2021-06-24 14:17:08.454727928 +0800 +++ pidgin-2.14.5.new/libpurple/proxy.c 2021-06-24 14:17:17.098045115 +0800 @@ -90,6 +90,12 @@ static PurpleProxyInfo *global_proxy_info = NULL; +typedef struct { + gchar *hostname; + gint port; +} PurpleProxyNoProxyEntry; +static GList *no_proxy_entries = NULL; + static GSList *handles = NULL; static void try_connect(PurpleProxyConnectData *connect_data); @@ -205,6 +211,118 @@ } /************************************************************************** + * no proxy helpers + **************************************************************************/ +static PurpleProxyNoProxyEntry * +purple_proxy_no_proxy_entry_new(const gchar *hostname, gint port) { + PurpleProxyNoProxyEntry *entry = NULL; + + entry = g_new(PurpleProxyNoProxyEntry, 1); + entry->hostname = g_strdup(hostname); + entry->port = port; + + return entry; +} + +static void +purple_proxy_no_proxy_entry_free(PurpleProxyNoProxyEntry *entry) { + g_free(entry->hostname); + g_free(entry); +} + +static gint +purple_proxy_no_proxy_compare(gconstpointer a, gconstpointer b) { + const PurpleProxyNoProxyEntry *entry, *connection; + + entry = (const PurpleProxyNoProxyEntry *)a; + connection = (const PurpleProxyNoProxyEntry *)b; + + /* check port first as it's quicker */ + if(entry->port != 0 && entry->port != connection->port) { + return -1; + } + + /* * is used to match any host, but this check needs to be after the port + * because *:6667 is a valid entry. + */ + if(purple_strequal(entry->hostname, "*")) { + return 0; + } + + /* if the host name matches, don't proxy it */ + if(purple_strequal(connection->hostname, entry->hostname)) { + return 0; + } + + /* finally check if the requested host has a known suffix */ + if(g_str_has_suffix(connection->hostname, entry->hostname)) { + size_t clen = strlen(connection->hostname); + size_t elen = strlen(entry->hostname); + + /* make sure the connection hostname has at least one more character + * than the entry so that we don't do an out of bound read. + */ + if(clen > elen) { + if(connection->hostname[clen - elen - 1] == '.') { + return 0; + } + } + } + + return -1; +} + +static void +parse_no_proxy_list(const gchar *no_proxy) { + gchar **items; + gint i; + + g_return_if_fail(no_proxy != NULL); + g_return_if_fail(no_proxy_entries == NULL); + + /* The no_proxy value is comma separated */ + items = g_strsplit(no_proxy, ",", -1); + + for(i = 0; items[i] != NULL; i++) { + PurpleProxyNoProxyEntry *entry = NULL; + gchar *hostname = NULL; + gchar *s_port = NULL; + gint port = 0; + + s_port = g_strstr_len(items[i], -1, ":"); + if(s_port != NULL && *s_port + 1 != '\0') { + /* read the port starting with the next character */ + port = atoi(s_port + 1); + + /* since we're done with the port, now turn item into a null + * terminated string of just the hostname. + */ + *s_port = '\0'; + } + + /* items[i] is currently either the original or with :port removed */ + hostname = items[i]; + + g_strstrip(hostname); + + /* finally remove any leading .'s from hostname */ + while(hostname[0] == '.') { + hostname += 1; + } + + if(*hostname == '\0') { + continue; + } + + /* finally add the new entry to the list */ + entry = purple_proxy_no_proxy_entry_new(hostname, port); + no_proxy_entries = g_list_prepend(no_proxy_entries, entry); + } + + g_strfreev(items); +} + +/************************************************************************** * Global Proxy API **************************************************************************/ PurpleProxyInfo * @@ -2312,6 +2430,8 @@ const char *connecthost = host; int connectport = port; PurpleProxyConnectData *connect_data; + PurpleProxyNoProxyEntry entry; + GList *found = NULL; g_return_val_if_fail(host != NULL, NULL); g_return_val_if_fail(port > 0, NULL); @@ -2325,9 +2445,31 @@ connect_data->data = data; connect_data->host = g_strdup(host); connect_data->port = port; - connect_data->gpi = purple_proxy_get_setup(account); connect_data->account = account; + /* Check if the hostname:port matches anything in the no_proxy environment + * variable to determine if this connection should be proxied or not. + */ + entry.hostname = connect_data->host; + entry.port = connect_data->port; + found = g_list_find_custom(no_proxy_entries, &entry, + purple_proxy_no_proxy_compare); + + if(found != NULL) { + purple_debug_info( + "proxy", + "directly connecting to %s:%d because it matched the no_proxy " + "environment variable.\n", + connect_data->host, + connect_data->port + ); + + connect_data->gpi = purple_proxy_info_new(); + purple_proxy_info_set_type(connect_data->gpi, PURPLE_PROXY_NONE); + } else { + connect_data->gpi = purple_proxy_get_setup(account); + } + if ((purple_proxy_info_get_type(connect_data->gpi) != PURPLE_PROXY_NONE) && (purple_proxy_info_get_host(connect_data->gpi) == NULL || purple_proxy_info_get_port(connect_data->gpi) <= 0)) { @@ -2380,6 +2522,8 @@ const char *connecthost = host; int connectport = port; PurpleProxyConnectData *connect_data; + PurpleProxyNoProxyEntry entry; + GList *found; g_return_val_if_fail(host != NULL, NULL); g_return_val_if_fail(port > 0, NULL); @@ -2393,9 +2537,27 @@ connect_data->data = data; connect_data->host = g_strdup(host); connect_data->port = port; - connect_data->gpi = purple_proxy_get_setup(account); connect_data->account = account; + entry.hostname = connect_data->host; + entry.port = connect_data->port; + found = g_list_find_custom(no_proxy_entries, &entry, + purple_proxy_no_proxy_compare); + if(found != NULL) { + purple_debug_info( + "proxy", + "directly connecting to %s:%d because it matched the no_proxy " + "environment variable.\n", + connect_data->host, + connect_data->port + ); + + connect_data->gpi = purple_proxy_info_new(); + purple_proxy_info_set_type(connect_data->gpi, PURPLE_PROXY_NONE); + } else { + connect_data->gpi = purple_proxy_get_setup(account); + } + if ((purple_proxy_info_get_type(connect_data->gpi) != PURPLE_PROXY_NONE) && (purple_proxy_info_get_host(connect_data->gpi) == NULL || purple_proxy_info_get_port(connect_data->gpi) <= 0)) { @@ -2613,6 +2775,55 @@ purple_proxy_init(void) { void *handle; + const gchar *no_proxy_value = NULL; + + /* + * See Standardizing no_proxy in for this patch. + */ + no_proxy_value = g_getenv("no_proxy"); + if(no_proxy_value == NULL) { + no_proxy_value = g_getenv("NO_PROXY"); + } + + if(no_proxy_value != NULL) { + /* + * Some test cases (when we are connecting to libera with SOCKS5 on port + * 6667): + * + * Use proxy because empty list. + * $ no_proxy= pidgin --debug + * + * Ignore the leading ., match suffix and skip proxy. + * $ no_proxy=.libera.chat:6667 pidgin --debug + * + * Treat empty port as unspecified and skip proxy. + * $ no_proxy=libera.chat: pidgin --debug + * + * Ignore the first empty element and skip proxy. + * $ no_proxy=,libera.chat:6667 pidgin --debug + * + * Should not work with empty host, if you want to skip proxy for + * all hosts with a specific port please see next example. + * $ no_proxy=:6667 pidgin --debug + * + * Should skip proxy. + * $ no_proxy="*:6667" pidgin --debug + * + * Should NOT skip proxy. + * $ no_proxy="*:6669" pidgin --debug + * + * Should skip proxy. + * $ no_proxy="*" pidgin --debug + */ + + parse_no_proxy_list(no_proxy_value); + + purple_debug_info("proxy", + "Found no_proxy envrionment variable ('%s')\n", + no_proxy_value); + purple_debug_info("proxy", "Loaded %d no_proxy exceptions\n", + g_list_length(no_proxy_entries)); + } /* Initialize a default proxy info struct. */ global_proxy_info = purple_proxy_info_new(); @@ -2660,4 +2871,8 @@ purple_proxy_info_destroy(global_proxy_info); global_proxy_info = NULL; + + g_list_free_full(no_proxy_entries, + (GDestroyNotify)purple_proxy_no_proxy_entry_free); + no_proxy_entries = NULL; }