Commit | Line | Data |
---|---|---|
212b6f5d | 1 | #include "commands.h" |
2117e02e MW |
2 | #include "fd.h" |
3 | #include "sig.h" | |
2117e02e MW |
4 | #include "stralloc.h" |
5 | #include "substdio.h" | |
2117e02e | 6 | #include "alloc.h" |
2117e02e MW |
7 | #include "wait.h" |
8 | #include "str.h" | |
212b6f5d | 9 | #include "byte.h" |
2117e02e MW |
10 | #include "now.h" |
11 | #include "fmt.h" | |
12 | #include "exit.h" | |
13 | #include "readwrite.h" | |
212b6f5d MW |
14 | #include "timeoutread.h" |
15 | #include "timeoutwrite.h" | |
2117e02e | 16 | |
212b6f5d | 17 | void die() { _exit(1); } |
2117e02e | 18 | |
212b6f5d | 19 | int saferead(fd,buf,len) int fd; char *buf; int len; |
2117e02e | 20 | { |
212b6f5d MW |
21 | int r; |
22 | r = timeoutread(1200,fd,buf,len); | |
23 | if (r <= 0) die(); | |
24 | return r; | |
2117e02e MW |
25 | } |
26 | ||
212b6f5d MW |
27 | int safewrite(fd,buf,len) int fd; char *buf; int len; |
28 | { | |
29 | int r; | |
30 | r = timeoutwrite(1200,fd,buf,len); | |
31 | if (r <= 0) die(); | |
32 | return r; | |
33 | } | |
2117e02e | 34 | |
212b6f5d MW |
35 | char ssoutbuf[128]; |
36 | substdio ssout = SUBSTDIO_FDBUF(safewrite,1,ssoutbuf,sizeof ssoutbuf); | |
2117e02e | 37 | |
212b6f5d MW |
38 | char ssinbuf[128]; |
39 | substdio ssin = SUBSTDIO_FDBUF(saferead,0,ssinbuf,sizeof ssinbuf); | |
40 | ||
41 | void puts(s) char *s; | |
2117e02e | 42 | { |
212b6f5d | 43 | substdio_puts(&ssout,s); |
2117e02e | 44 | } |
212b6f5d | 45 | void flush() |
2117e02e | 46 | { |
212b6f5d | 47 | substdio_flush(&ssout); |
2117e02e MW |
48 | } |
49 | void err(s) char *s; | |
50 | { | |
212b6f5d MW |
51 | puts("-ERR "); |
52 | puts(s); | |
53 | puts("\r\n"); | |
54 | flush(); | |
2117e02e | 55 | } |
212b6f5d | 56 | |
2117e02e MW |
57 | void die_usage() { err("usage: popup hostname subprogram"); die(); } |
58 | void die_nomem() { err("out of memory"); die(); } | |
59 | void die_pipe() { err("unable to open pipe"); die(); } | |
60 | void die_write() { err("unable to write pipe"); die(); } | |
61 | void die_fork() { err("unable to fork"); die(); } | |
62 | void die_childcrashed() { err("aack, child crashed"); } | |
63 | void die_badauth() { err("authorization failed"); } | |
64 | ||
65 | void err_syntax() { err("syntax error"); } | |
66 | void err_wantuser() { err("USER first"); } | |
67 | void err_authoriz() { err("authorization first"); } | |
68 | ||
212b6f5d MW |
69 | void okay() { puts("+OK \r\n"); flush(); } |
70 | void pop3_quit() { okay(); die(); } | |
2117e02e MW |
71 | |
72 | ||
73 | char unique[FMT_ULONG + FMT_ULONG + 3]; | |
74 | char *hostname; | |
75 | stralloc username = {0}; | |
76 | int seenuser = 0; | |
77 | char **childargs; | |
78 | substdio ssup; | |
79 | char upbuf[128]; | |
80 | ||
81 | ||
82 | void doanddie(user,userlen,pass) | |
83 | char *user; | |
84 | unsigned int userlen; /* including 0 byte */ | |
85 | char *pass; | |
86 | { | |
212b6f5d MW |
87 | int child; |
88 | int wstat; | |
89 | int pi[2]; | |
90 | ||
91 | if (fd_copy(2,1) == -1) die_pipe(); | |
92 | close(3); | |
93 | if (pipe(pi) == -1) die_pipe(); | |
94 | if (pi[0] != 3) die_pipe(); | |
95 | switch(child = fork()) { | |
96 | case -1: | |
97 | die_fork(); | |
98 | case 0: | |
99 | close(pi[1]); | |
100 | sig_pipedefault(); | |
101 | execvp(*childargs,childargs); | |
102 | _exit(1); | |
2117e02e | 103 | } |
212b6f5d MW |
104 | close(pi[0]); |
105 | substdio_fdbuf(&ssup,write,pi[1],upbuf,sizeof upbuf); | |
106 | if (substdio_put(&ssup,user,userlen) == -1) die_write(); | |
107 | if (substdio_put(&ssup,pass,str_len(pass) + 1) == -1) die_write(); | |
108 | if (substdio_puts(&ssup,"<") == -1) die_write(); | |
109 | if (substdio_puts(&ssup,unique) == -1) die_write(); | |
110 | if (substdio_puts(&ssup,hostname) == -1) die_write(); | |
111 | if (substdio_put(&ssup,">",2) == -1) die_write(); | |
112 | if (substdio_flush(&ssup) == -1) die_write(); | |
113 | close(pi[1]); | |
114 | byte_zero(pass,str_len(pass)); | |
115 | byte_zero(upbuf,sizeof upbuf); | |
116 | if (wait_pid(&wstat,child) == -1) die(); | |
117 | if (wait_crashed(wstat)) die_childcrashed(); | |
118 | if (wait_exitcode(wstat)) die_badauth(); | |
119 | die(); | |
2117e02e MW |
120 | } |
121 | void pop3_greet() | |
122 | { | |
212b6f5d MW |
123 | char *s; |
124 | s = unique; | |
125 | s += fmt_uint(s,getpid()); | |
126 | *s++ = '.'; | |
127 | s += fmt_ulong(s,(unsigned long) now()); | |
128 | *s++ = '@'; | |
129 | *s++ = 0; | |
130 | puts("+OK <"); | |
131 | puts(unique); | |
132 | puts(hostname); | |
133 | puts(">\r\n"); | |
134 | flush(); | |
2117e02e MW |
135 | } |
136 | void pop3_user(arg) char *arg; | |
137 | { | |
212b6f5d MW |
138 | if (!*arg) { err_syntax(); return; } |
139 | okay(); | |
140 | seenuser = 1; | |
141 | if (!stralloc_copys(&username,arg)) die_nomem(); | |
142 | if (!stralloc_0(&username)) die_nomem(); | |
2117e02e MW |
143 | } |
144 | void pop3_pass(arg) char *arg; | |
145 | { | |
212b6f5d MW |
146 | if (!seenuser) { err_wantuser(); return; } |
147 | if (!*arg) { err_syntax(); return; } | |
148 | doanddie(username.s,username.len,arg); | |
2117e02e MW |
149 | } |
150 | void pop3_apop(arg) char *arg; | |
151 | { | |
212b6f5d MW |
152 | char *space; |
153 | space = arg + str_chr(arg,' '); | |
154 | if (!*space) { err_syntax(); return; } | |
155 | *space++ = 0; | |
156 | doanddie(arg,space - arg,space); | |
2117e02e MW |
157 | } |
158 | ||
212b6f5d MW |
159 | struct commands pop3commands[] = { |
160 | { "user", pop3_user, 0 } | |
161 | , { "pass", pop3_pass, 0 } | |
162 | , { "apop", pop3_apop, 0 } | |
163 | , { "quit", pop3_quit, 0 } | |
164 | , { "noop", okay, 0 } | |
165 | , { 0, err_authoriz, 0 } | |
166 | } ; | |
2117e02e MW |
167 | |
168 | void main(argc,argv) | |
169 | int argc; | |
170 | char **argv; | |
171 | { | |
212b6f5d MW |
172 | sig_alarmcatch(die); |
173 | sig_pipeignore(); | |
174 | ||
175 | hostname = argv[1]; | |
176 | if (!hostname) die_usage(); | |
177 | childargs = argv + 2; | |
178 | if (!*childargs) die_usage(); | |
179 | ||
180 | pop3_greet(); | |
181 | commands(&ssin,pop3commands); | |
182 | die(); | |
2117e02e | 183 | } |