From 6be86147f292b3178413bc644853ad80b620042e Mon Sep 17 00:00:00 2001 From: marha Date: Fri, 19 Nov 2010 12:14:18 +0000 Subject: Reintegrate tools from trunk --- tools/plink/raw.c | 300 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 300 insertions(+) create mode 100644 tools/plink/raw.c (limited to 'tools/plink/raw.c') diff --git a/tools/plink/raw.c b/tools/plink/raw.c new file mode 100644 index 000000000..ea51d74a7 --- /dev/null +++ b/tools/plink/raw.c @@ -0,0 +1,300 @@ +/* + * "Raw" backend. + */ + +#include +#include + +#include "putty.h" + +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef TRUE +#define TRUE 1 +#endif + +#define RAW_MAX_BACKLOG 4096 + +typedef struct raw_backend_data { + const struct plug_function_table *fn; + /* the above field _must_ be first in the structure */ + + Socket s; + int bufsize; + void *frontend; +} *Raw; + +static void raw_size(void *handle, int width, int height); + +static void c_write(Raw raw, char *buf, int len) +{ + int backlog = from_backend(raw->frontend, 0, buf, len); + sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG); +} + +static void raw_log(Plug plug, int type, SockAddr addr, int port, + const char *error_msg, int error_code) +{ + Raw raw = (Raw) plug; + char addrbuf[256], *msg; + + sk_getaddr(addr, addrbuf, lenof(addrbuf)); + + if (type == 0) + msg = dupprintf("Connecting to %s port %d", addrbuf, port); + else + msg = dupprintf("Failed to connect to %s: %s", addrbuf, error_msg); + + logevent(raw->frontend, msg); +} + +static int raw_closing(Plug plug, const char *error_msg, int error_code, + int calling_back) +{ + Raw raw = (Raw) plug; + + if (raw->s) { + sk_close(raw->s); + raw->s = NULL; + notify_remote_exit(raw->frontend); + } + if (error_msg) { + /* A socket error has occurred. */ + logevent(raw->frontend, error_msg); + connection_fatal(raw->frontend, "%s", error_msg); + } /* Otherwise, the remote side closed the connection normally. */ + return 0; +} + +static int raw_receive(Plug plug, int urgent, char *data, int len) +{ + Raw raw = (Raw) plug; + c_write(raw, data, len); + return 1; +} + +static void raw_sent(Plug plug, int bufsize) +{ + Raw raw = (Raw) plug; + raw->bufsize = bufsize; +} + +/* + * Called to set up the raw connection. + * + * Returns an error message, or NULL on success. + * + * Also places the canonical host name into `realhost'. It must be + * freed by the caller. + */ +static const char *raw_init(void *frontend_handle, void **backend_handle, + Config *cfg, + 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; + const char *err; + Raw raw; + + raw = snew(struct raw_backend_data); + raw->fn = &fn_table; + raw->s = NULL; + *backend_handle = raw; + + raw->frontend = frontend_handle; + + /* + * Try to find host. + */ + { + char *buf; + buf = dupprintf("Looking up host \"%s\"%s", host, + (cfg->addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" : + (cfg->addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" : + ""))); + logevent(raw->frontend, buf); + sfree(buf); + } + addr = name_lookup(host, port, realhost, cfg, cfg->addressfamily); + if ((err = sk_addr_error(addr)) != NULL) { + sk_addr_free(addr); + return err; + } + + if (port < 0) + port = 23; /* default telnet port */ + + /* + * Open socket. + */ + raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive, + (Plug) raw, cfg); + if ((err = sk_socket_error(raw->s)) != NULL) + return err; + + if (*cfg->loghost) { + char *colon; + + sfree(*realhost); + *realhost = dupstr(cfg->loghost); + colon = strrchr(*realhost, ':'); + if (colon) { + /* + * FIXME: if we ever update this aspect of ssh.c for + * IPv6 literal management, this should change in line + * with it. + */ + *colon++ = '\0'; + } + } + + return NULL; +} + +static void raw_free(void *handle) +{ + Raw raw = (Raw) handle; + + if (raw->s) + sk_close(raw->s); + sfree(raw); +} + +/* + * Stub routine (we don't have any need to reconfigure this backend). + */ +static void raw_reconfig(void *handle, Config *cfg) +{ +} + +/* + * Called to send data down the raw connection. + */ +static int raw_send(void *handle, char *buf, int len) +{ + Raw raw = (Raw) handle; + + if (raw->s == NULL) + return 0; + + raw->bufsize = sk_write(raw->s, buf, len); + + return raw->bufsize; +} + +/* + * Called to query the current socket sendability status. + */ +static int raw_sendbuffer(void *handle) +{ + Raw raw = (Raw) handle; + return raw->bufsize; +} + +/* + * Called to set the size of the window + */ +static void raw_size(void *handle, int width, int height) +{ + /* Do nothing! */ + return; +} + +/* + * Send raw special codes. + */ +static void raw_special(void *handle, Telnet_Special code) +{ + /* Do nothing! */ + return; +} + +/* + * 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 != NULL; +} + +static int raw_sendok(void *handle) +{ + return 1; +} + +static void raw_unthrottle(void *handle, int backlog) +{ + Raw raw = (Raw) handle; + sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG); +} + +static int raw_ldisc(void *handle, int option) +{ + if (option == LD_EDIT || option == LD_ECHO) + return 1; + 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) +{ + Raw raw = (Raw) handle; + if (raw->s != NULL) + return -1; /* still connected */ + 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_get_specials, + raw_connected, + raw_exitcode, + raw_sendok, + raw_ldisc, + raw_provide_ldisc, + raw_provide_logctx, + raw_unthrottle, + raw_cfg_info, + "raw", + PROT_RAW, + 0 +}; -- cgit v1.2.3