X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/8eebd22198133e95ce25af1dd15dead0a5389371..79bf227ba7ba02e32ac710621b672e2789f9ef50:/raw.c diff --git a/raw.c b/raw.c index 58b060c5..8c1f97fd 100644 --- a/raw.c +++ b/raw.c @@ -1,4 +1,3 @@ -#include #include #include @@ -13,40 +12,51 @@ #define RAW_MAX_BACKLOG 4096 -static Socket s = NULL; -static int raw_bufsize; +typedef struct raw_backend_data { + const struct plug_function_table *fn; + /* the above field _must_ be first in the structure */ -static void raw_size(void); + Socket s; + int bufsize; + void *frontend; +} *Raw; -static void c_write(char *buf, int len) +static void raw_size(void *handle, int width, int height); + +static void c_write(Raw raw, char *buf, int len) { - int backlog = from_backend(0, buf, len); - sk_set_frozen(s, backlog > RAW_MAX_BACKLOG); + int backlog = from_backend(raw->frontend, 0, buf, len); + sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG); } -static int raw_closing(Plug plug, char *error_msg, int error_code, +static int raw_closing(Plug plug, const char *error_msg, int error_code, int calling_back) { - if (s) { - sk_close(s); - s = NULL; + Raw raw = (Raw) plug; + + if (raw->s) { + sk_close(raw->s); + raw->s = NULL; } if (error_msg) { /* A socket error has occurred. */ - connection_fatal(error_msg); + 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) { - c_write(data, len); + Raw raw = (Raw) plug; + c_write(raw, data, len); return 1; } static void raw_sent(Plug plug, int bufsize) { - raw_bufsize = bufsize; + Raw raw = (Raw) plug; + raw->bufsize = bufsize; } /* @@ -57,28 +67,41 @@ 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(char *host, int port, char **realhost, int nodelay) +static const char *raw_init(void *frontend_handle, void **backend_handle, + Config *cfg, + char *host, int port, char **realhost, int nodelay, + int keepalive) { - static struct plug_function_table fn_table = { + static const struct plug_function_table fn_table = { raw_closing, raw_receive, raw_sent - }, *fn_table_ptr = &fn_table; - + }; SockAddr addr; - char *err; + 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[200]; - sprintf(buf, "Looking up host \"%.170s\"", host); - logevent(buf); + char *buf; + buf = dupprintf("Looking up host \"%s\"", host); + logevent(raw->frontend, buf); + sfree(buf); } - addr = sk_namelookup(host, realhost); - if ((err = sk_addr_error(addr))) + addr = name_lookup(host, port, realhost, cfg); + if ((err = sk_addr_error(addr)) != NULL) { + sk_addr_free(addr); return err; + } if (port < 0) port = 23; /* default telnet port */ @@ -87,45 +110,64 @@ static char *raw_init(char *host, int port, char **realhost, int nodelay) * Open socket. */ { - char buf[200], addrbuf[100]; + char *buf, addrbuf[100]; sk_getaddr(addr, addrbuf, 100); - sprintf(buf, "Connecting to %.100s port %d", addrbuf, port); - logevent(buf); + buf = dupprintf("Connecting to %s port %d", addrbuf, port); + logevent(raw->frontend, buf); + sfree(buf); } - s = new_connection(addr, *realhost, port, 0, 1, nodelay, &fn_table_ptr); - if ((err = sk_socket_error(s))) + raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, keepalive, + (Plug) raw, cfg); + if ((err = sk_socket_error(raw->s)) != NULL) return err; - sk_addr_free(addr); - 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(char *buf, int len) +static int raw_send(void *handle, char *buf, int len) { - if (s == NULL) + Raw raw = (Raw) handle; + + if (raw->s == NULL) return 0; - raw_bufsize = sk_write(s, buf, len); + raw->bufsize = sk_write(raw->s, buf, len); - return raw_bufsize; + return raw->bufsize; } /* * Called to query the current socket sendability status. */ -static int raw_sendbuffer(void) +static int raw_sendbuffer(void *handle) { - return raw_bufsize; + Raw raw = (Raw) handle; + return raw->bufsize; } /* * Called to set the size of the window */ -static void raw_size(void) +static void raw_size(void *handle, int width, int height) { /* Do nothing! */ return; @@ -134,50 +176,80 @@ static void raw_size(void) /* * Send raw special codes. */ -static void raw_special(Telnet_Special code) +static void raw_special(void *handle, Telnet_Special code) { /* Do nothing! */ return; } -static Socket raw_socket(void) +/* + * 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 Socket raw_socket(void *handle) { - return s; + Raw raw = (Raw) handle; + return raw->s; } -static int raw_sendok(void) +static int raw_sendok(void *handle) { return 1; } -static void raw_unthrottle(int backlog) +static void raw_unthrottle(void *handle, int backlog) { - sk_set_frozen(s, backlog > RAW_MAX_BACKLOG); + Raw raw = (Raw) handle; + sk_set_frozen(raw->s, backlog > RAW_MAX_BACKLOG); } -static int raw_ldisc(int option) +static int raw_ldisc(void *handle, int option) { if (option == LD_EDIT || option == LD_ECHO) return 1; return 0; } -static int raw_exitcode(void) +static void raw_provide_ldisc(void *handle, void *ldisc) { - /* Exit codes are a meaningless concept in the Raw protocol */ - return 0; + /* 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; } Backend raw_backend = { raw_init, + raw_free, + raw_reconfig, raw_send, raw_sendbuffer, raw_size, raw_special, + raw_get_specials, raw_socket, raw_exitcode, raw_sendok, raw_ldisc, + raw_provide_ldisc, + raw_provide_logctx, raw_unthrottle, 1 };