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1 | #include <windows.h> |
2 | #include <stdio.h> |
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3 | #include <ctype.h> |
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4 | |
5 | #include "putty.h" |
6 | |
7 | /* |
8 | * ldisc.c: PuTTY line disciplines |
9 | */ |
10 | |
11 | static void c_write (char *buf, int len) { |
12 | while (len--) { |
13 | int new_head = (inbuf_head + 1) & INBUF_MASK; |
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14 | if (new_head != inbuf_reap) { |
15 | inbuf[inbuf_head] = *buf++; |
16 | inbuf_head = new_head; |
17 | } |
18 | } |
19 | } |
20 | |
21 | static char *term_buf = NULL; |
22 | static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; |
23 | |
24 | static int plen(unsigned char c) { |
25 | if ((c >= 32 && c <= 126) || |
26 | (c >= 160)) |
27 | return 1; |
28 | else if (c < 128) |
29 | return 2; /* ^x for some x */ |
30 | else |
31 | return 4; /* <XY> for hex XY */ |
32 | } |
33 | |
34 | static void pwrite(unsigned char c) { |
35 | if ((c >= 32 && c <= 126) || |
36 | (c >= 160)) { |
37 | char cc = (char)c; |
38 | c_write(&cc, 1); |
39 | } else if (c < 128) { |
40 | char cc[2]; |
41 | cc[1] = (c == 127 ? '?' : c + 0x40); |
42 | cc[0] = '^'; |
43 | c_write(cc, 2); |
44 | } else { |
45 | char cc[5]; |
46 | sprintf(cc, "<%02X>", c); |
47 | c_write(cc, 4); |
48 | } |
49 | } |
50 | |
51 | static void bsb(int n) { |
52 | while (n--) |
53 | c_write("\010 \010", 3); |
54 | } |
55 | |
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56 | #define CTRL(x) (x^'@') |
57 | |
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58 | static void term_send(char *buf, int len) { |
59 | while (len--) { |
60 | char c; |
61 | c = *buf++; |
62 | switch (term_quotenext ? ' ' : c) { |
63 | /* |
64 | * ^h/^?: delete one char and output one BSB |
65 | * ^w: delete, and output BSBs, to return to last space/nonspace |
66 | * boundary |
67 | * ^u: delete, and output BSBs, to return to BOL |
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68 | * ^c: Do a ^u then send a telnet IP |
69 | * ^z: Do a ^u then send a telnet SUSP |
70 | * ^\: Do a ^u then send a telnet ABORT |
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71 | * ^r: echo "^R\n" and redraw line |
72 | * ^v: quote next char |
73 | * ^d: if at BOL, end of file and close connection, else send line |
74 | * and reset to BOL |
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75 | * ^m: send line-plus-\r\n and reset to BOL |
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76 | */ |
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77 | case CTRL('H'): case CTRL('?'): /* backspace/delete */ |
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78 | if (term_buflen > 0) { |
79 | bsb(plen(term_buf[term_buflen-1])); |
80 | term_buflen--; |
81 | } |
82 | break; |
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83 | case CTRL('W'): /* delete word */ |
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84 | while (term_buflen > 0) { |
85 | bsb(plen(term_buf[term_buflen-1])); |
86 | term_buflen--; |
87 | if (term_buflen > 0 && |
88 | isspace(term_buf[term_buflen-1]) && |
89 | !isspace(term_buf[term_buflen])) |
90 | break; |
91 | } |
92 | break; |
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93 | case CTRL('U'): /* delete line */ |
94 | case CTRL('C'): /* Send IP */ |
95 | case CTRL('\\'): /* Quit */ |
96 | case CTRL('Z'): /* Suspend */ |
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97 | while (term_buflen > 0) { |
98 | bsb(plen(term_buf[term_buflen-1])); |
99 | term_buflen--; |
100 | } |
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101 | back->special (TS_EL); |
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102 | if( c == CTRL('C') ) back->special (TS_IP); |
103 | if( c == CTRL('Z') ) back->special (TS_SUSP); |
104 | if( c == CTRL('\\') ) back->special (TS_ABORT); |
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105 | break; |
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106 | case CTRL('R'): /* redraw line */ |
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107 | c_write("^R\r\n", 4); |
108 | { |
109 | int i; |
110 | for (i = 0; i < term_buflen; i++) |
111 | pwrite(term_buf[i]); |
112 | } |
113 | break; |
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114 | case CTRL('V'): /* quote next char */ |
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115 | term_quotenext = TRUE; |
116 | break; |
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117 | case CTRL('D'): /* logout or send */ |
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118 | if (term_buflen == 0) { |
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119 | back->special (TS_EOF); |
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120 | } else { |
121 | back->send(term_buf, term_buflen); |
122 | term_buflen = 0; |
123 | } |
124 | break; |
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125 | case CTRL('M'): /* send with newline */ |
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126 | back->send(term_buf, term_buflen); |
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127 | if (cfg.protocol == PROT_RAW) |
128 | back->send("\r\n", 2); |
129 | else |
130 | back->send("\r", 1); |
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131 | c_write("\r\n", 2); |
132 | term_buflen = 0; |
133 | break; |
134 | default: /* get to this label from ^V handler */ |
135 | if (term_buflen >= term_bufsiz) { |
136 | term_bufsiz = term_buflen + 256; |
137 | term_buf = saferealloc(term_buf, term_bufsiz); |
138 | } |
139 | term_buf[term_buflen++] = c; |
140 | pwrite(c); |
141 | term_quotenext = FALSE; |
142 | break; |
143 | } |
144 | } |
145 | } |
146 | |
147 | static void simple_send(char *buf, int len) { |
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148 | if( term_buflen != 0 ) |
149 | { |
150 | back->send(term_buf, term_buflen); |
151 | while (term_buflen > 0) { |
152 | bsb(plen(term_buf[term_buflen-1])); |
153 | term_buflen--; |
154 | } |
155 | } |
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156 | back->send(buf, len); |
157 | } |
158 | |
159 | Ldisc ldisc_term = { term_send }; |
160 | Ldisc ldisc_simple = { simple_send }; |