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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) { |
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12 | while (len--) |
13 | c_write1(*buf++); |
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14 | } |
15 | |
16 | static char *term_buf = NULL; |
17 | static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; |
18 | |
19 | static int plen(unsigned char c) { |
20 | if ((c >= 32 && c <= 126) || |
21 | (c >= 160)) |
22 | return 1; |
23 | else if (c < 128) |
24 | return 2; /* ^x for some x */ |
25 | else |
26 | return 4; /* <XY> for hex XY */ |
27 | } |
28 | |
29 | static void pwrite(unsigned char c) { |
30 | if ((c >= 32 && c <= 126) || |
31 | (c >= 160)) { |
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32 | c_write1(c); |
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33 | } else if (c < 128) { |
34 | char cc[2]; |
35 | cc[1] = (c == 127 ? '?' : c + 0x40); |
36 | cc[0] = '^'; |
37 | c_write(cc, 2); |
38 | } else { |
39 | char cc[5]; |
40 | sprintf(cc, "<%02X>", c); |
41 | c_write(cc, 4); |
42 | } |
43 | } |
44 | |
45 | static void bsb(int n) { |
46 | while (n--) |
47 | c_write("\010 \010", 3); |
48 | } |
49 | |
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50 | #define CTRL(x) (x^'@') |
51 | |
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52 | static void term_send(char *buf, int len) { |
53 | while (len--) { |
54 | char c; |
55 | c = *buf++; |
56 | switch (term_quotenext ? ' ' : c) { |
57 | /* |
58 | * ^h/^?: delete one char and output one BSB |
59 | * ^w: delete, and output BSBs, to return to last space/nonspace |
60 | * boundary |
61 | * ^u: delete, and output BSBs, to return to BOL |
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62 | * ^c: Do a ^u then send a telnet IP |
63 | * ^z: Do a ^u then send a telnet SUSP |
64 | * ^\: Do a ^u then send a telnet ABORT |
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65 | * ^r: echo "^R\n" and redraw line |
66 | * ^v: quote next char |
67 | * ^d: if at BOL, end of file and close connection, else send line |
68 | * and reset to BOL |
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69 | * ^m: send line-plus-\r\n and reset to BOL |
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70 | */ |
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71 | case CTRL('H'): case CTRL('?'): /* backspace/delete */ |
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72 | if (term_buflen > 0) { |
73 | bsb(plen(term_buf[term_buflen-1])); |
74 | term_buflen--; |
75 | } |
76 | break; |
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77 | case CTRL('W'): /* delete word */ |
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78 | while (term_buflen > 0) { |
79 | bsb(plen(term_buf[term_buflen-1])); |
80 | term_buflen--; |
81 | if (term_buflen > 0 && |
82 | isspace(term_buf[term_buflen-1]) && |
83 | !isspace(term_buf[term_buflen])) |
84 | break; |
85 | } |
86 | break; |
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87 | case CTRL('U'): /* delete line */ |
88 | case CTRL('C'): /* Send IP */ |
89 | case CTRL('\\'): /* Quit */ |
90 | case CTRL('Z'): /* Suspend */ |
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91 | while (term_buflen > 0) { |
92 | bsb(plen(term_buf[term_buflen-1])); |
93 | term_buflen--; |
94 | } |
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95 | back->special (TS_EL); |
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96 | if( c == CTRL('C') ) back->special (TS_IP); |
97 | if( c == CTRL('Z') ) back->special (TS_SUSP); |
98 | if( c == CTRL('\\') ) back->special (TS_ABORT); |
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99 | break; |
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100 | case CTRL('R'): /* redraw line */ |
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101 | c_write("^R\r\n", 4); |
102 | { |
103 | int i; |
104 | for (i = 0; i < term_buflen; i++) |
105 | pwrite(term_buf[i]); |
106 | } |
107 | break; |
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108 | case CTRL('V'): /* quote next char */ |
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109 | term_quotenext = TRUE; |
110 | break; |
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111 | case CTRL('D'): /* logout or send */ |
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112 | if (term_buflen == 0) { |
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113 | back->special (TS_EOF); |
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114 | } else { |
115 | back->send(term_buf, term_buflen); |
116 | term_buflen = 0; |
117 | } |
118 | break; |
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119 | case CTRL('M'): /* send with newline */ |
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120 | if (term_buflen > 0) |
121 | back->send(term_buf, term_buflen); |
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122 | if (cfg.protocol == PROT_RAW) |
123 | back->send("\r\n", 2); |
124 | else |
125 | back->send("\r", 1); |
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126 | c_write("\r\n", 2); |
127 | term_buflen = 0; |
128 | break; |
129 | default: /* get to this label from ^V handler */ |
130 | if (term_buflen >= term_bufsiz) { |
131 | term_bufsiz = term_buflen + 256; |
132 | term_buf = saferealloc(term_buf, term_bufsiz); |
133 | } |
134 | term_buf[term_buflen++] = c; |
135 | pwrite(c); |
136 | term_quotenext = FALSE; |
137 | break; |
138 | } |
139 | } |
140 | } |
141 | |
142 | static void simple_send(char *buf, int len) { |
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143 | if( term_buflen != 0 ) |
144 | { |
145 | back->send(term_buf, term_buflen); |
146 | while (term_buflen > 0) { |
147 | bsb(plen(term_buf[term_buflen-1])); |
148 | term_buflen--; |
149 | } |
150 | } |
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151 | if (len > 0) |
152 | back->send(buf, len); |
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153 | } |
154 | |
155 | Ldisc ldisc_term = { term_send }; |
156 | Ldisc ldisc_simple = { simple_send }; |