X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=raw.c;h=0c5445ad432c28619033cc7cf13f7a0e1c639365;hb=refs%2Fheads%2F0.68%2Bkerberos-fix;hp=f21e3ca98754af33a1a68813674ca7ffaa9401ec;hpb=72ff5711481bc349f3eafe2347e4ca154048ab63;p=PuTTY.git diff --git a/raw.c b/raw.c index f21e3ca9..0c5445ad 100644 --- a/raw.c +++ b/raw.c @@ -1,6 +1,10 @@ -#include +/* + * "Raw" backend. + */ + #include #include +#include #include "putty.h" @@ -18,8 +22,12 @@ typedef struct raw_backend_data { /* the above field _must_ be first in the structure */ Socket s; + int closed_on_socket_error; int bufsize; void *frontend; + int sent_console_eof, sent_socket_eof, session_started; + + Conf *conf; } *Raw; static void raw_size(void *handle, int width, int height); @@ -30,20 +38,60 @@ static void c_write(Raw raw, char *buf, int len) sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG); } -static int raw_closing(Plug plug, char *error_msg, int error_code, - int calling_back) +static void raw_log(Plug plug, int type, SockAddr addr, int port, + const char *error_msg, int error_code) { Raw raw = (Raw) plug; + backend_socket_log(raw->frontend, type, addr, port, + error_msg, error_code, raw->conf, raw->session_started); +} - if (raw->s) { - sk_close(raw->s); - raw->s = NULL; +static void raw_check_close(Raw raw) +{ + /* + * Called after we send EOF on either the socket or the console. + * Its job is to wind up the session once we have sent EOF on both. + */ + if (raw->sent_console_eof && raw->sent_socket_eof) { + if (raw->s) { + sk_close(raw->s); + raw->s = NULL; + notify_remote_exit(raw->frontend); + } } +} + +static int raw_closing(Plug plug, const char *error_msg, int error_code, + int calling_back) +{ + Raw raw = (Raw) plug; + if (error_msg) { - /* A socket error has occurred. */ - logevent(error_msg); - connection_fatal("%s", error_msg); - } /* Otherwise, the remote side closed the connection normally. */ + /* A socket error has occurred. */ + if (raw->s) { + sk_close(raw->s); + raw->s = NULL; + raw->closed_on_socket_error = TRUE; + notify_remote_exit(raw->frontend); + } + logevent(raw->frontend, error_msg); + connection_fatal(raw->frontend, "%s", error_msg); + } else { + /* Otherwise, the remote side closed the connection normally. */ + if (!raw->sent_console_eof && from_backend_eof(raw->frontend)) { + /* + * The front end wants us to close the outgoing side of the + * connection as soon as we see EOF from the far end. + */ + if (!raw->sent_socket_eof) { + if (raw->s) + sk_write_eof(raw->s); + raw->sent_socket_eof= TRUE; + } + } + raw->sent_console_eof = TRUE; + raw_check_close(raw); + } return 0; } @@ -51,6 +99,9 @@ static int raw_receive(Plug plug, int urgent, char *data, int len) { Raw raw = (Raw) plug; c_write(raw, data, len); + /* We count 'session start', for proxy logging purposes, as being + * when data is received from the network and printed. */ + raw->session_started = TRUE; return 1; } @@ -68,36 +119,45 @@ static void raw_sent(Plug plug, int bufsize) * Also places the canonical host name into `realhost'. It must be * freed by the caller. */ -static char *raw_init(void *frontend_handle, void **backend_handle, - char *host, int port, char **realhost, int nodelay) +static const char *raw_init(void *frontend_handle, void **backend_handle, + Conf *conf, + const char *host, int port, char **realhost, + int nodelay, int keepalive) { static const struct plug_function_table fn_table = { + raw_log, raw_closing, raw_receive, raw_sent }; SockAddr addr; - char *err; + const char *err; Raw raw; + int addressfamily; + char *loghost; - raw = smalloc(sizeof(*raw)); + raw = snew(struct raw_backend_data); raw->fn = &fn_table; raw->s = NULL; + raw->closed_on_socket_error = FALSE; *backend_handle = raw; + raw->sent_console_eof = raw->sent_socket_eof = FALSE; + raw->bufsize = 0; + raw->session_started = FALSE; + raw->conf = conf_copy(conf); raw->frontend = frontend_handle; + addressfamily = conf_get_int(conf, CONF_addressfamily); /* * Try to find host. */ - { - char buf[200]; - sprintf(buf, "Looking up host \"%.170s\"", host); - logevent(buf); - } - addr = sk_namelookup(host, realhost); - if ((err = sk_addr_error(addr))) + addr = name_lookup(host, port, realhost, conf, addressfamily, + raw->frontend, "main connection"); + if ((err = sk_addr_error(addr)) != NULL) { + sk_addr_free(addr); return err; + } if (port < 0) port = 23; /* default telnet port */ @@ -105,25 +165,47 @@ static char *raw_init(void *frontend_handle, void **backend_handle, /* * Open socket. */ - { - char buf[200], addrbuf[100]; - sk_getaddr(addr, addrbuf, 100); - sprintf(buf, "Connecting to %.100s port %d", addrbuf, port); - logevent(buf); - } - raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, (Plug) raw); - if ((err = sk_socket_error(raw->s))) + raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive, + (Plug) raw, conf); + if ((err = sk_socket_error(raw->s)) != NULL) return err; - sk_addr_free(addr); + loghost = conf_get_str(conf, CONF_loghost); + if (*loghost) { + char *colon; + + sfree(*realhost); + *realhost = dupstr(loghost); + + colon = host_strrchr(*realhost, ':'); + if (colon) + *colon++ = '\0'; + } return NULL; } +static void raw_free(void *handle) +{ + Raw raw = (Raw) handle; + + if (raw->s) + sk_close(raw->s); + conf_free(raw->conf); + sfree(raw); +} + +/* + * Stub routine (we don't have any need to reconfigure this backend). + */ +static void raw_reconfig(void *handle, Conf *conf) +{ +} + /* * Called to send data down the raw connection. */ -static int raw_send(void *handle, char *buf, int len) +static int raw_send(void *handle, const char *buf, int len) { Raw raw = (Raw) handle; @@ -154,18 +236,33 @@ static void raw_size(void *handle, int width, int height) } /* - * Send raw special codes. + * Send raw special codes. We only handle outgoing EOF here. */ static void raw_special(void *handle, Telnet_Special code) { - /* Do nothing! */ + Raw raw = (Raw) handle; + if (code == TS_EOF && raw->s) { + sk_write_eof(raw->s); + raw->sent_socket_eof= TRUE; + raw_check_close(raw); + } + return; } -static Socket raw_socket(void *handle) +/* + * Return a list of the special codes that make sense in this + * protocol. + */ +static const struct telnet_special *raw_get_specials(void *handle) +{ + return NULL; +} + +static int raw_connected(void *handle) { Raw raw = (Raw) handle; - return raw->s; + return raw->s != NULL; } static int raw_sendok(void *handle) @@ -186,22 +283,55 @@ static int raw_ldisc(void *handle, int option) return 0; } +static void raw_provide_ldisc(void *handle, void *ldisc) +{ + /* This is a stub. */ +} + +static void raw_provide_logctx(void *handle, void *logctx) +{ + /* This is a stub. */ +} + static int raw_exitcode(void *handle) { - /* Exit codes are a meaningless concept in the Raw protocol */ + Raw raw = (Raw) handle; + if (raw->s != NULL) + return -1; /* still connected */ + else if (raw->closed_on_socket_error) + return INT_MAX; /* a socket error counts as an unclean exit */ + else + /* Exit codes are a meaningless concept in the Raw protocol */ + return 0; +} + +/* + * cfg_info for Raw does nothing at all. + */ +static int raw_cfg_info(void *handle) +{ return 0; } Backend raw_backend = { raw_init, + raw_free, + raw_reconfig, raw_send, raw_sendbuffer, raw_size, raw_special, - raw_socket, + raw_get_specials, + raw_connected, raw_exitcode, raw_sendok, raw_ldisc, + raw_provide_ldisc, + raw_provide_logctx, raw_unthrottle, - 1 + raw_cfg_info, + NULL /* test_for_upstream */, + "raw", + PROT_RAW, + 0 };