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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 | from_backend(0, buf, len); |
13 | } |
14 | |
15 | static void c_write1 (char c) { |
16 | c_write(&c, 1); |
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17 | } |
18 | |
19 | static char *term_buf = NULL; |
20 | static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; |
21 | |
22 | static int plen(unsigned char c) { |
23 | if ((c >= 32 && c <= 126) || |
24 | (c >= 160)) |
25 | return 1; |
26 | else if (c < 128) |
27 | return 2; /* ^x for some x */ |
28 | else |
29 | return 4; /* <XY> for hex XY */ |
30 | } |
31 | |
32 | static void pwrite(unsigned char c) { |
33 | if ((c >= 32 && c <= 126) || |
34 | (c >= 160)) { |
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35 | c_write1(c); |
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36 | } else if (c < 128) { |
37 | char cc[2]; |
38 | cc[1] = (c == 127 ? '?' : c + 0x40); |
39 | cc[0] = '^'; |
40 | c_write(cc, 2); |
41 | } else { |
42 | char cc[5]; |
43 | sprintf(cc, "<%02X>", c); |
44 | c_write(cc, 4); |
45 | } |
46 | } |
47 | |
48 | static void bsb(int n) { |
49 | while (n--) |
50 | c_write("\010 \010", 3); |
51 | } |
52 | |
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53 | #define CTRL(x) (x^'@') |
54 | |
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55 | static void term_send(char *buf, int len) { |
56 | while (len--) { |
57 | char c; |
58 | c = *buf++; |
59 | switch (term_quotenext ? ' ' : c) { |
60 | /* |
61 | * ^h/^?: delete one char and output one BSB |
62 | * ^w: delete, and output BSBs, to return to last space/nonspace |
63 | * boundary |
64 | * ^u: delete, and output BSBs, to return to BOL |
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65 | * ^c: Do a ^u then send a telnet IP |
66 | * ^z: Do a ^u then send a telnet SUSP |
67 | * ^\: Do a ^u then send a telnet ABORT |
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68 | * ^r: echo "^R\n" and redraw line |
69 | * ^v: quote next char |
70 | * ^d: if at BOL, end of file and close connection, else send line |
71 | * and reset to BOL |
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72 | * ^m: send line-plus-\r\n and reset to BOL |
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73 | */ |
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74 | case CTRL('H'): case CTRL('?'): /* backspace/delete */ |
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75 | if (term_buflen > 0) { |
76 | bsb(plen(term_buf[term_buflen-1])); |
77 | term_buflen--; |
78 | } |
79 | break; |
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80 | case CTRL('W'): /* delete word */ |
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81 | while (term_buflen > 0) { |
82 | bsb(plen(term_buf[term_buflen-1])); |
83 | term_buflen--; |
84 | if (term_buflen > 0 && |
85 | isspace(term_buf[term_buflen-1]) && |
86 | !isspace(term_buf[term_buflen])) |
87 | break; |
88 | } |
89 | break; |
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90 | case CTRL('U'): /* delete line */ |
91 | case CTRL('C'): /* Send IP */ |
92 | case CTRL('\\'): /* Quit */ |
93 | case CTRL('Z'): /* Suspend */ |
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94 | while (term_buflen > 0) { |
95 | bsb(plen(term_buf[term_buflen-1])); |
96 | term_buflen--; |
97 | } |
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98 | back->special (TS_EL); |
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99 | if( c == CTRL('C') ) back->special (TS_IP); |
100 | if( c == CTRL('Z') ) back->special (TS_SUSP); |
101 | if( c == CTRL('\\') ) back->special (TS_ABORT); |
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102 | break; |
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103 | case CTRL('R'): /* redraw line */ |
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104 | c_write("^R\r\n", 4); |
105 | { |
106 | int i; |
107 | for (i = 0; i < term_buflen; i++) |
108 | pwrite(term_buf[i]); |
109 | } |
110 | break; |
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111 | case CTRL('V'): /* quote next char */ |
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112 | term_quotenext = TRUE; |
113 | break; |
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114 | case CTRL('D'): /* logout or send */ |
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115 | if (term_buflen == 0) { |
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116 | back->special (TS_EOF); |
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117 | } else { |
118 | back->send(term_buf, term_buflen); |
119 | term_buflen = 0; |
120 | } |
121 | break; |
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122 | case CTRL('M'): /* send with newline */ |
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123 | if (term_buflen > 0) |
124 | back->send(term_buf, term_buflen); |
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125 | if (cfg.protocol == PROT_RAW) |
126 | back->send("\r\n", 2); |
127 | else |
128 | back->send("\r", 1); |
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129 | c_write("\r\n", 2); |
130 | term_buflen = 0; |
131 | break; |
132 | default: /* get to this label from ^V handler */ |
133 | if (term_buflen >= term_bufsiz) { |
134 | term_bufsiz = term_buflen + 256; |
135 | term_buf = saferealloc(term_buf, term_bufsiz); |
136 | } |
137 | term_buf[term_buflen++] = c; |
138 | pwrite(c); |
139 | term_quotenext = FALSE; |
140 | break; |
141 | } |
142 | } |
143 | } |
144 | |
145 | static void simple_send(char *buf, int len) { |
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146 | if( term_buflen != 0 ) |
147 | { |
148 | back->send(term_buf, term_buflen); |
149 | while (term_buflen > 0) { |
150 | bsb(plen(term_buf[term_buflen-1])); |
151 | term_buflen--; |
152 | } |
153 | } |
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154 | if (len > 0) |
155 | back->send(buf, len); |
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156 | } |
157 | |
158 | Ldisc ldisc_term = { term_send }; |
159 | Ldisc ldisc_simple = { simple_send }; |