зеркало из https://github.com/github/putty.git
348 строки
9.2 KiB
C
348 строки
9.2 KiB
C
#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include "putty.h"
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/*
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* Some command-line parameters need to be saved up until after
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* we've loaded the saved session which will form the basis of our
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* eventual running configuration. For this we use the macro
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* SAVEABLE, which notices if the `need_save' parameter is set and
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* saves the parameter and value on a list.
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*
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* We also assign priorities to saved parameters, just to slightly
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* ameliorate silly ordering problems. For example, if you specify
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* a saved session to load, it will be loaded _before_ all your
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* local modifications such as -L are evaluated; and if you specify
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* a protocol and a port, the protocol is set up first so that the
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* port can override its choice of port number.
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*
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* (In fact -load is not saved at all, since in at least Plink the
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* processing of further command-line options depends on whether or
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* not the loaded session contained a hostname. So it must be
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* executed immediately.)
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*/
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#define NPRIORITIES 2
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struct cmdline_saved_param {
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char *p, *value;
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};
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struct cmdline_saved_param_set {
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struct cmdline_saved_param *params;
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int nsaved, savesize;
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};
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/*
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* C guarantees this structure will be initialised to all zero at
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* program start, which is exactly what we want.
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*/
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static struct cmdline_saved_param_set saves[NPRIORITIES];
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static void cmdline_save_param(char *p, char *value, int pri)
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{
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if (saves[pri].nsaved >= saves[pri].savesize) {
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saves[pri].savesize = saves[pri].nsaved + 32;
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saves[pri].params = sresize(saves[pri].params, saves[pri].savesize,
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struct cmdline_saved_param);
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}
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saves[pri].params[saves[pri].nsaved].p = p;
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saves[pri].params[saves[pri].nsaved].value = value;
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saves[pri].nsaved++;
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}
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void cmdline_cleanup(void)
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{
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int pri;
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for (pri = 0; pri < NPRIORITIES; pri++)
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sfree(saves[pri].params);
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}
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#define SAVEABLE(pri) do { \
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if (need_save) { cmdline_save_param(p, value, pri); return ret; } \
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} while (0)
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char *cmdline_password = NULL;
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static int cmdline_get_line(const char *prompt, char *str,
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int maxlen, int is_pw)
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{
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static int tried_once = 0;
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assert(is_pw && cmdline_password);
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if (tried_once) {
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return 0;
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} else {
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strncpy(str, cmdline_password, maxlen);
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str[maxlen - 1] = '\0';
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tried_once = 1;
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return 1;
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}
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}
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/*
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* Here we have a flags word which describes the capabilities of
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* the particular tool on whose behalf we're running. We will
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* refuse certain command-line options if a particular tool
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* inherently can't do anything sensible. For example, the file
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* transfer tools (psftp, pscp) can't do a great deal with protocol
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* selections (ever tried running scp over telnet?) or with port
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* forwarding (even if it wasn't a hideously bad idea, they don't
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* have the select() infrastructure to make them work).
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*/
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int cmdline_tooltype = 0;
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static int cmdline_check_unavailable(int flag, char *p)
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{
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if (cmdline_tooltype & flag) {
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cmdline_error("option \"%s\" not available in this tool", p);
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return 1;
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}
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return 0;
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}
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#define UNAVAILABLE_IN(flag) do { \
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if (cmdline_check_unavailable(flag, p)) return ret; \
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} while (0)
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/*
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* Process a standard command-line parameter. `p' is the parameter
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* in question; `value' is the subsequent element of argv, which
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* may or may not be required as an operand to the parameter.
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* Return value is 2 if both arguments were used; 1 if only p was
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* used; 0 if the parameter wasn't one we recognised; -2 if it
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* should have been 2 but value was NULL.
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*/
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#define RETURN(x) do { \
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if ((x) == 2 && !value) return -2; \
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ret = x; \
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if (need_save < 0) return x; \
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} while (0)
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int cmdline_process_param(char *p, char *value, int need_save, Config *cfg)
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{
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int ret = 0;
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if (!strcmp(p, "-load")) {
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RETURN(2);
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/* This parameter must be processed immediately rather than being
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* saved. */
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do_defaults(value, cfg);
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return 2;
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}
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if (!strcmp(p, "-ssh")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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default_protocol = cfg->protocol = PROT_SSH;
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default_port = cfg->port = 22;
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return 1;
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}
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if (!strcmp(p, "-telnet")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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default_protocol = cfg->protocol = PROT_TELNET;
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default_port = cfg->port = 23;
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return 1;
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}
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if (!strcmp(p, "-rlogin")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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default_protocol = cfg->protocol = PROT_RLOGIN;
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default_port = cfg->port = 513;
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return 1;
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}
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if (!strcmp(p, "-raw")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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default_protocol = cfg->protocol = PROT_RAW;
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}
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if (!strcmp(p, "-v")) {
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RETURN(1);
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flags |= FLAG_VERBOSE;
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}
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if (!strcmp(p, "-l")) {
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RETURN(2);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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strncpy(cfg->username, value, sizeof(cfg->username));
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cfg->username[sizeof(cfg->username) - 1] = '\0';
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}
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if ((!strcmp(p, "-L") || !strcmp(p, "-R") || !strcmp(p, "-D"))) {
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char *fwd, *ptr, *q, *qq;
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int dynamic, i=0;
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RETURN(2);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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dynamic = !strcmp(p, "-D");
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fwd = value;
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ptr = cfg->portfwd;
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/* if multiple forwards, find end of list */
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if (ptr[0]=='R' || ptr[0]=='L' || ptr[0] == 'D') {
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for (i = 0; i < sizeof(cfg->portfwd) - 2; i++)
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if (ptr[i]=='\000' && ptr[i+1]=='\000')
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break;
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ptr = ptr + i + 1; /* point to next forward slot */
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}
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ptr[0] = p[1]; /* insert a 'L', 'R' or 'D' at the start */
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if (strlen(fwd) > sizeof(cfg->portfwd) - i - 2) {
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cmdline_error("out of space for port forwardings");
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return ret;
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}
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strncpy(ptr+1, fwd, sizeof(cfg->portfwd) - i);
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if (!dynamic) {
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/*
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* We expect _at least_ two colons in this string. The
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* possible formats are `sourceport:desthost:destport',
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* or `sourceip:sourceport:desthost:destport' if you're
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* specifying a particular loopback address. We need to
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* replace the one between source and dest with a \t;
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* this means we must find the second-to-last colon in
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* the string.
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*/
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q = qq = strchr(ptr, ':');
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while (qq) {
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char *qqq = strchr(qq+1, ':');
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if (qqq)
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q = qq;
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qq = qqq;
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}
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if (q) *q = '\t'; /* replace second-last colon with \t */
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}
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cfg->portfwd[sizeof(cfg->portfwd) - 1] = '\0';
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cfg->portfwd[sizeof(cfg->portfwd) - 2] = '\0';
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ptr[strlen(ptr)+1] = '\000'; /* append two '\000' */
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}
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if (!strcmp(p, "-m")) {
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char *filename, *command;
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int cmdlen, cmdsize;
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FILE *fp;
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int c, d;
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RETURN(2);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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filename = value;
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cmdlen = cmdsize = 0;
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command = NULL;
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fp = fopen(filename, "r");
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if (!fp) {
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cmdline_error("unable to open command "
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"file \"%s\"", filename);
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return ret;
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}
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do {
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c = fgetc(fp);
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d = c;
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if (c == EOF)
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d = 0;
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if (cmdlen >= cmdsize) {
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cmdsize = cmdlen + 512;
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command = sresize(command, cmdsize, char);
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}
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command[cmdlen++] = d;
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} while (c != EOF);
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cfg->remote_cmd_ptr = command;
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cfg->remote_cmd_ptr2 = NULL;
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cfg->nopty = TRUE; /* command => no terminal */
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}
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if (!strcmp(p, "-P")) {
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RETURN(2);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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SAVEABLE(1); /* lower priority than -ssh,-telnet */
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cfg->port = atoi(value);
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}
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if (!strcmp(p, "-pw")) {
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RETURN(2);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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cmdline_password = value;
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ssh_get_line = cmdline_get_line;
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ssh_getline_pw_only = TRUE;
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}
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if (!strcmp(p, "-A")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->agentfwd = 1;
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}
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if (!strcmp(p, "-a")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->agentfwd = 0;
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}
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if (!strcmp(p, "-X")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->x11_forward = 1;
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}
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if (!strcmp(p, "-x")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->x11_forward = 0;
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}
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if (!strcmp(p, "-t")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->nopty = 0;
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}
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if (!strcmp(p, "-T")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER | TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->nopty = 1;
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}
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if (!strcmp(p, "-C")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->compression = 1;
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}
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if (!strcmp(p, "-1")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->sshprot = 0; /* ssh protocol 1 only */
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}
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if (!strcmp(p, "-2")) {
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RETURN(1);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->sshprot = 3; /* ssh protocol 2 only */
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}
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if (!strcmp(p, "-i")) {
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RETURN(2);
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UNAVAILABLE_IN(TOOLTYPE_NONNETWORK);
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SAVEABLE(0);
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cfg->keyfile = filename_from_str(value);
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}
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return ret; /* unrecognised */
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}
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void cmdline_run_saved(Config *cfg)
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{
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int pri, i;
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for (pri = 0; pri < NPRIORITIES; pri++)
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for (i = 0; i < saves[pri].nsaved; i++)
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cmdline_process_param(saves[pri].params[i].p,
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saves[pri].params[i].value, 0, cfg);
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}
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