Fix rxvt shifted keys and OOB array access
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parent
298bc01ee2
commit
11b4d7cb4f
113
driver-csi.c
113
driver-csi.c
@ -4,10 +4,17 @@
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#include <stdio.h>
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#include <string.h>
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// There are 64 codes 0x40 - 0x7F
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// There are 64 basic codes 0x40 - 0x7F that end a key sequence,
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// plus 0x24 ($) for shifted keys in rxvt-based terminals.
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// The CSI/SS3 naming isn't completely appropriate, as that only really applies
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// to the other direction of communication, that is from the application
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// to the terminal. What the terminal sends back doesn't have to conform to
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// ECMA-48 (and indeed doesn't, as rxvt's 0x24 ($) is out of the range).
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static int keyinfo_initialised = 0;
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static struct keyinfo ss3s[64];
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static char ss3_kpalts[64];
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static struct keyinfo ss3s[96];
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static char ss3_kpalts[96];
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typedef struct
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{
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@ -17,13 +24,13 @@ termo_csi_t;
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typedef termo_result_t (*csi_handler_fn)
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(termo_t *tk, termo_key_t *key, int cmd, long *arg, int args);
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static csi_handler_fn csi_handlers[64];
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static csi_handler_fn csi_handlers[96];
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//
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// Handler for CSI/SS3 cmd keys
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//
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static struct keyinfo csi_ss3s[64];
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static struct keyinfo csi_ss3s[96];
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static termo_result_t
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handle_csi_ss3_full (termo_t *tk,
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@ -36,10 +43,10 @@ handle_csi_ss3_full (termo_t *tk,
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else
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key->modifiers = 0;
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key->type = csi_ss3s[cmd - 0x40].type;
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key->code.sym = csi_ss3s[cmd - 0x40].sym;
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key->modifiers &= ~(csi_ss3s[cmd - 0x40].modifier_mask);
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key->modifiers |= csi_ss3s[cmd - 0x40].modifier_set;
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key->type = csi_ss3s[cmd - 0x20].type;
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key->code.sym = csi_ss3s[cmd - 0x20].sym;
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key->modifiers &= ~(csi_ss3s[cmd - 0x20].modifier_mask);
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key->modifiers |= csi_ss3s[cmd - 0x20].modifier_set;
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if (key->code.sym == TERMO_SYM_UNKNOWN)
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return TERMO_RES_NONE;
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@ -50,15 +57,15 @@ static void
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register_csi_ss3_full (termo_type_t type, termo_sym_t sym,
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int modifier_set, int modifier_mask, unsigned char cmd)
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{
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if (cmd < 0x40 || cmd >= 0x80)
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if (cmd < 0x20 || cmd >= 0x80)
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return;
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csi_ss3s[cmd - 0x40].type = type;
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csi_ss3s[cmd - 0x40].sym = sym;
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csi_ss3s[cmd - 0x40].modifier_set = modifier_set;
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csi_ss3s[cmd - 0x40].modifier_mask = modifier_mask;
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csi_ss3s[cmd - 0x20].type = type;
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csi_ss3s[cmd - 0x20].sym = sym;
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csi_ss3s[cmd - 0x20].modifier_set = modifier_set;
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csi_ss3s[cmd - 0x20].modifier_mask = modifier_mask;
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csi_handlers[cmd - 0x40] = &handle_csi_ss3_full;
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csi_handlers[cmd - 0x20] = &handle_csi_ss3_full;
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}
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static void
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@ -106,13 +113,13 @@ static void
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register_ss3 (termo_type_t type, termo_sym_t sym,
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int modifier_set, unsigned char cmd)
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{
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if (cmd < 0x40 || cmd >= 0x80)
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if (cmd < 0x20 || cmd >= 0x80)
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return;
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ss3s[cmd - 0x40].type = type;
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ss3s[cmd - 0x40].sym = sym;
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ss3s[cmd - 0x40].modifier_set = modifier_set;
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ss3s[cmd - 0x40].modifier_mask = 0;
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ss3s[cmd - 0x20].type = type;
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ss3s[cmd - 0x20].sym = sym;
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ss3s[cmd - 0x20].modifier_set = modifier_set;
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ss3s[cmd - 0x20].modifier_mask = 0;
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}
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//
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@ -123,15 +130,15 @@ static void
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register_ss3kpalt (termo_type_t type, termo_sym_t sym,
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unsigned char cmd, char kpalt)
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{
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if (cmd < 0x40 || cmd >= 0x80)
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if (cmd < 0x20 || cmd >= 0x80)
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return;
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ss3s[cmd - 0x40].type = type;
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ss3s[cmd - 0x40].sym = sym;
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ss3s[cmd - 0x40].modifier_set = 0;
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ss3s[cmd - 0x40].modifier_mask = 0;
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ss3s[cmd - 0x20].type = type;
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ss3s[cmd - 0x20].sym = sym;
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ss3s[cmd - 0x20].modifier_set = 0;
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ss3s[cmd - 0x20].modifier_mask = 0;
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ss3_kpalts[cmd - 0x40] = kpalt;
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ss3_kpalts[cmd - 0x20] = kpalt;
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}
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//
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@ -191,7 +198,7 @@ register_csifunc (termo_type_t type, termo_sym_t sym, int number)
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csifuncs[number].modifier_set = 0;
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csifuncs[number].modifier_mask = 0;
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csi_handlers['~' - 0x40] = &handle_csifunc;
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csi_handlers['~' - 0x20] = &handle_csifunc;
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}
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//
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@ -446,7 +453,11 @@ parse_csi (termo_t *tk, size_t introlen, size_t *csi_len,
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size_t csi_end = introlen;
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while (csi_end < tk->buffcount)
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{
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if (CHARAT (csi_end) >= 0x40 && CHARAT (csi_end) < 0x80)
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// Specifically allowing the rxvt special character
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// for shifted function keys to end a CSI-like sequence,
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// otherwise expecting ECMA-48-like input
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unsigned char c = CHARAT (csi_end);
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if ((c >= 0x40 && c < 0x80) || c == '$')
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break;
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csi_end++;
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}
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@ -547,10 +558,10 @@ register_keys (void)
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register_csi_ss3 (TERMO_TYPE_FUNCTION, 4, 'S');
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// Handle Shift-modified rxvt cursor keys (CSI a, CSI b, CSI c, CSI d)
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csi_handlers['a' - 0x40] = &handle_csi_cursor;
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csi_handlers['b' - 0x40] = &handle_csi_cursor;
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csi_handlers['c' - 0x40] = &handle_csi_cursor;
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csi_handlers['d' - 0x40] = &handle_csi_cursor;
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csi_handlers['a' - 0x20] = &handle_csi_cursor;
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csi_handlers['b' - 0x20] = &handle_csi_cursor;
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csi_handlers['c' - 0x20] = &handle_csi_cursor;
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csi_handlers['d' - 0x20] = &handle_csi_cursor;
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// Handle Ctrl-modified rxvt cursor keys (SS3 a, SS3 b, SS3 c, SS3 d)
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register_ss3 (TERMO_TYPE_KEYSYM, TERMO_SYM_UP, TERMO_KEYMOD_CTRL, 'a');
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@ -618,18 +629,18 @@ register_keys (void)
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register_csifunc (TERMO_TYPE_FUNCTION, 19, 33);
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register_csifunc (TERMO_TYPE_FUNCTION, 20, 34);
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csi_handlers['u' - 0x40] = &handle_csi_u;
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csi_handlers['u' - 0x20] = &handle_csi_u;
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csi_handlers['M' - 0x40] = &handle_csi_m;
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csi_handlers['m' - 0x40] = &handle_csi_m;
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csi_handlers['M' - 0x20] = &handle_csi_m;
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csi_handlers['m' - 0x20] = &handle_csi_m;
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csi_handlers['R' - 0x40] = &handle_csi_R;
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csi_handlers['R' - 0x20] = &handle_csi_R;
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csi_handlers['y' - 0x40] = &handle_csi_y;
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csi_handlers['y' - 0x20] = &handle_csi_y;
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csi_handlers['^' - 0x40] = &handle_csi_rxvt;
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csi_handlers['$' - 0x40] = &handle_csi_rxvt;
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csi_handlers['@' - 0x40] = &handle_csi_rxvt;
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csi_handlers['^' - 0x20] = &handle_csi_rxvt;
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csi_handlers['$' - 0x20] = &handle_csi_rxvt;
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csi_handlers['@' - 0x20] = &handle_csi_rxvt;
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keyinfo_initialised = 1;
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return 1;
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@ -700,9 +711,9 @@ peekkey_csi (termo_t *tk, termo_csi_t *csi,
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termo_result_t result = TERMO_RES_NONE;
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// We know from the logic above that cmd must be >= 0x40 and < 0x80
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if (csi_handlers[(cmd & 0xff) - 0x40])
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result = (*csi_handlers[(cmd & 0xff) - 0x40]) (tk, key, cmd, arg, args);
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// We know from the logic above that cmd must be >= 0x20 and < 0x80
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if (csi_handlers[(cmd & 0xff) - 0x20])
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result = (*csi_handlers[(cmd & 0xff) - 0x20]) (tk, key, cmd, arg, args);
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if (result == TERMO_RES_NONE)
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{
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@ -761,16 +772,16 @@ peekkey_ss3 (termo_t *tk, termo_csi_t *csi, size_t introlen,
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if (cmd < 0x40 || cmd >= 0x80)
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return TERMO_RES_NONE;
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key->type = csi_ss3s[cmd - 0x40].type;
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key->code.sym = csi_ss3s[cmd - 0x40].sym;
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key->modifiers = csi_ss3s[cmd - 0x40].modifier_set;
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key->type = csi_ss3s[cmd - 0x20].type;
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key->code.sym = csi_ss3s[cmd - 0x20].sym;
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key->modifiers = csi_ss3s[cmd - 0x20].modifier_set;
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if (key->code.sym == TERMO_SYM_UNKNOWN)
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{
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if (tk->flags & TERMO_FLAG_CONVERTKP && ss3_kpalts[cmd - 0x40])
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if (tk->flags & TERMO_FLAG_CONVERTKP && ss3_kpalts[cmd - 0x20])
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{
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key->type = TERMO_TYPE_KEY;
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key->code.codepoint = ss3_kpalts[cmd - 0x40];
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key->code.codepoint = ss3_kpalts[cmd - 0x20];
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key->modifiers = 0;
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key->multibyte[0] = key->code.codepoint;
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@ -778,9 +789,9 @@ peekkey_ss3 (termo_t *tk, termo_csi_t *csi, size_t introlen,
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}
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else
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{
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key->type = ss3s[cmd - 0x40].type;
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key->code.sym = ss3s[cmd - 0x40].sym;
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key->modifiers = ss3s[cmd - 0x40].modifier_set;
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key->type = ss3s[cmd - 0x20].type;
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key->code.sym = ss3s[cmd - 0x20].sym;
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key->modifiers = ss3s[cmd - 0x20].modifier_set;
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}
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}
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