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1 | #include <windows.h> |
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2 | #ifndef AUTO_WINSOCK |
3 | #ifdef WINSOCK_TWO |
4 | #include <winsock2.h> |
5 | #else |
6 | #include <winsock.h> |
7 | #endif |
8 | #endif |
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9 | #include <stdio.h> |
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10 | #include <ctype.h> |
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11 | |
12 | #include "putty.h" |
13 | |
14 | /* |
15 | * ldisc.c: PuTTY line disciplines |
16 | */ |
17 | |
18 | static void c_write (char *buf, int len) { |
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19 | from_backend(0, buf, len); |
20 | } |
21 | |
22 | static void c_write1 (char c) { |
23 | c_write(&c, 1); |
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24 | } |
25 | |
26 | static char *term_buf = NULL; |
27 | static int term_buflen = 0, term_bufsiz = 0, term_quotenext = 0; |
28 | |
29 | static int plen(unsigned char c) { |
30 | if ((c >= 32 && c <= 126) || |
31 | (c >= 160)) |
32 | return 1; |
33 | else if (c < 128) |
34 | return 2; /* ^x for some x */ |
35 | else |
36 | return 4; /* <XY> for hex XY */ |
37 | } |
38 | |
39 | static void pwrite(unsigned char c) { |
40 | if ((c >= 32 && c <= 126) || |
41 | (c >= 160)) { |
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42 | c_write1(c); |
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43 | } else if (c < 128) { |
44 | char cc[2]; |
45 | cc[1] = (c == 127 ? '?' : c + 0x40); |
46 | cc[0] = '^'; |
47 | c_write(cc, 2); |
48 | } else { |
49 | char cc[5]; |
50 | sprintf(cc, "<%02X>", c); |
51 | c_write(cc, 4); |
52 | } |
53 | } |
54 | |
55 | static void bsb(int n) { |
56 | while (n--) |
57 | c_write("\010 \010", 3); |
58 | } |
59 | |
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60 | #define CTRL(x) (x^'@') |
61 | |
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62 | static void term_send(char *buf, int len) { |
63 | while (len--) { |
64 | char c; |
65 | c = *buf++; |
66 | switch (term_quotenext ? ' ' : c) { |
67 | /* |
68 | * ^h/^?: delete one char and output one BSB |
69 | * ^w: delete, and output BSBs, to return to last space/nonspace |
70 | * boundary |
71 | * ^u: delete, and output BSBs, to return to BOL |
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72 | * ^c: Do a ^u then send a telnet IP |
73 | * ^z: Do a ^u then send a telnet SUSP |
74 | * ^\: Do a ^u then send a telnet ABORT |
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75 | * ^r: echo "^R\n" and redraw line |
76 | * ^v: quote next char |
77 | * ^d: if at BOL, end of file and close connection, else send line |
78 | * and reset to BOL |
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79 | * ^m: send line-plus-\r\n and reset to BOL |
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80 | */ |
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81 | case CTRL('H'): case CTRL('?'): /* backspace/delete */ |
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82 | if (term_buflen > 0) { |
83 | bsb(plen(term_buf[term_buflen-1])); |
84 | term_buflen--; |
85 | } |
86 | break; |
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87 | case CTRL('W'): /* delete word */ |
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88 | while (term_buflen > 0) { |
89 | bsb(plen(term_buf[term_buflen-1])); |
90 | term_buflen--; |
91 | if (term_buflen > 0 && |
92 | isspace(term_buf[term_buflen-1]) && |
93 | !isspace(term_buf[term_buflen])) |
94 | break; |
95 | } |
96 | break; |
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97 | case CTRL('U'): /* delete line */ |
98 | case CTRL('C'): /* Send IP */ |
99 | case CTRL('\\'): /* Quit */ |
100 | case CTRL('Z'): /* Suspend */ |
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101 | while (term_buflen > 0) { |
102 | bsb(plen(term_buf[term_buflen-1])); |
103 | term_buflen--; |
104 | } |
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105 | back->special (TS_EL); |
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106 | if( c == CTRL('C') ) back->special (TS_IP); |
107 | if( c == CTRL('Z') ) back->special (TS_SUSP); |
108 | if( c == CTRL('\\') ) back->special (TS_ABORT); |
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109 | break; |
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110 | case CTRL('R'): /* redraw line */ |
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111 | c_write("^R\r\n", 4); |
112 | { |
113 | int i; |
114 | for (i = 0; i < term_buflen; i++) |
115 | pwrite(term_buf[i]); |
116 | } |
117 | break; |
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118 | case CTRL('V'): /* quote next char */ |
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119 | term_quotenext = TRUE; |
120 | break; |
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121 | case CTRL('D'): /* logout or send */ |
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122 | if (term_buflen == 0) { |
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123 | back->special (TS_EOF); |
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124 | } else { |
125 | back->send(term_buf, term_buflen); |
126 | term_buflen = 0; |
127 | } |
128 | break; |
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129 | case CTRL('M'): /* send with newline */ |
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130 | if (term_buflen > 0) |
131 | back->send(term_buf, term_buflen); |
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132 | if (cfg.protocol == PROT_RAW) |
133 | back->send("\r\n", 2); |
134 | else |
135 | back->send("\r", 1); |
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136 | c_write("\r\n", 2); |
137 | term_buflen = 0; |
138 | break; |
139 | default: /* get to this label from ^V handler */ |
140 | if (term_buflen >= term_bufsiz) { |
141 | term_bufsiz = term_buflen + 256; |
142 | term_buf = saferealloc(term_buf, term_bufsiz); |
143 | } |
144 | term_buf[term_buflen++] = c; |
145 | pwrite(c); |
146 | term_quotenext = FALSE; |
147 | break; |
148 | } |
149 | } |
150 | } |
151 | |
152 | static void simple_send(char *buf, int len) { |
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153 | if( term_buflen != 0 ) |
154 | { |
155 | back->send(term_buf, term_buflen); |
156 | while (term_buflen > 0) { |
157 | bsb(plen(term_buf[term_buflen-1])); |
158 | term_buflen--; |
159 | } |
160 | } |
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161 | if (len > 0) |
162 | back->send(buf, len); |
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163 | } |
164 | |
165 | Ldisc ldisc_term = { term_send }; |
166 | Ldisc ldisc_simple = { simple_send }; |