| 1 | /* A little hacked up program that allows a script to play the part of a remote |
| 2 | SMTP/LMTP server on stdin/stdout for testing purposes. Hacked from the more |
| 3 | complicated version that does it over a socket. */ |
| 4 | |
| 5 | |
| 6 | /* ANSI C standard includes */ |
| 7 | |
| 8 | #include <ctype.h> |
| 9 | #include <signal.h> |
| 10 | #include <stdarg.h> |
| 11 | #include <stddef.h> |
| 12 | #include <stdio.h> |
| 13 | #include <stdlib.h> |
| 14 | #include <string.h> |
| 15 | #include <time.h> |
| 16 | |
| 17 | /* Unix includes */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <unistd.h> |
| 21 | |
| 22 | #ifndef CS |
| 23 | # define CS (char *) |
| 24 | #endif |
| 25 | |
| 26 | |
| 27 | static FILE *log; |
| 28 | |
| 29 | |
| 30 | /************************************************* |
| 31 | * SIGALRM handler - crash out * |
| 32 | *************************************************/ |
| 33 | |
| 34 | static void |
| 35 | sigalrm_handler(int sig) |
| 36 | { |
| 37 | sig = sig; /* Keep picky compilers happy */ |
| 38 | fprintf(log, "Server timed out\n"); |
| 39 | exit(99); |
| 40 | } |
| 41 | |
| 42 | |
| 43 | |
| 44 | /************************************************* |
| 45 | * Main Program * |
| 46 | *************************************************/ |
| 47 | |
| 48 | int main(int argc, char **argv) |
| 49 | { |
| 50 | char *logfile; |
| 51 | char *logmode = "w"; |
| 52 | FILE *script; |
| 53 | unsigned char sbuffer[1024]; |
| 54 | unsigned char ibuffer[1024]; |
| 55 | |
| 56 | if (argc < 3) |
| 57 | { |
| 58 | fprintf(stdout, "500 Script and log file required\n"); |
| 59 | exit(1); |
| 60 | } |
| 61 | |
| 62 | /* Get the script and log open */ |
| 63 | |
| 64 | script = fopen(argv[1], "r"); |
| 65 | if (script == NULL) |
| 66 | { |
| 67 | fprintf(stdout, "500 Failed to open script %s: %s\r\n", argv[1], |
| 68 | strerror(errno)); |
| 69 | exit(1); |
| 70 | } |
| 71 | |
| 72 | logfile = argv[2]; |
| 73 | if (logfile[0] == '+') |
| 74 | { |
| 75 | logfile++; |
| 76 | logmode = "a"; |
| 77 | } |
| 78 | |
| 79 | log = fopen(logfile, logmode); |
| 80 | if (log == NULL) |
| 81 | { |
| 82 | fprintf(stdout, "500 Failed to open log %s: %s\r\n", logfile, |
| 83 | strerror(errno)); |
| 84 | exit(1); |
| 85 | } |
| 86 | |
| 87 | /* SIGALRM handler crashes out */ |
| 88 | |
| 89 | signal(SIGALRM, sigalrm_handler); |
| 90 | |
| 91 | /* Read the script, and do what it says. */ |
| 92 | |
| 93 | while (fgets(CS sbuffer, sizeof(sbuffer), script) != NULL) |
| 94 | { |
| 95 | int n = (int)strlen(CS sbuffer); |
| 96 | while (n > 0 && isspace(sbuffer[n-1])) n--; |
| 97 | sbuffer[n] = 0; |
| 98 | |
| 99 | /* If the script line starts with a digit, it is a response line which |
| 100 | we are to send. */ |
| 101 | |
| 102 | if (isdigit(sbuffer[0])) |
| 103 | { |
| 104 | fprintf(log, "%s\n", sbuffer); |
| 105 | fflush(log); |
| 106 | fprintf(stdout, "%s\r\n", sbuffer); |
| 107 | fflush(stdout); |
| 108 | } |
| 109 | |
| 110 | /* If the script line starts with "*sleep" we just sleep for a while |
| 111 | before continuing. Do not write this to the log, as it may not get |
| 112 | written at the right place in a log that's being shared. */ |
| 113 | |
| 114 | else if (strncmp(CS sbuffer, "*sleep ", 7) == 0) |
| 115 | { |
| 116 | sleep(atoi(CS sbuffer+7)); |
| 117 | } |
| 118 | |
| 119 | /* Otherwise the script line is the start of an input line we are expecting |
| 120 | from the client, or "*eof" indicating we expect the client to close the |
| 121 | connection. Read command line or data lines; the latter are indicated |
| 122 | by the expected line being just ".". */ |
| 123 | |
| 124 | else |
| 125 | { |
| 126 | int data = strcmp(CS sbuffer, ".") == 0; |
| 127 | |
| 128 | fprintf(log, "%s\n", sbuffer); |
| 129 | fflush(log); |
| 130 | |
| 131 | /* Loop for multiple data lines */ |
| 132 | |
| 133 | for (;;) |
| 134 | { |
| 135 | int n; |
| 136 | alarm(5); |
| 137 | if (fgets(CS ibuffer, sizeof(ibuffer), stdin) == NULL) |
| 138 | { |
| 139 | fprintf(log, "%sxpected EOF read from client\n", |
| 140 | (strncmp(CS sbuffer, "*eof", 4) == 0)? "E" : "Une"); |
| 141 | goto END_OFF; |
| 142 | } |
| 143 | alarm(0); |
| 144 | n = (int)strlen(CS ibuffer); |
| 145 | while (n > 0 && isspace(ibuffer[n-1])) n--; |
| 146 | ibuffer[n] = 0; |
| 147 | fprintf(log, "<<< %s\n", ibuffer); |
| 148 | if (!data || strcmp(CS ibuffer, ".") == 0) break; |
| 149 | } |
| 150 | |
| 151 | /* Check received what was expected */ |
| 152 | |
| 153 | if (strncmp(CS sbuffer, CS ibuffer, (int)strlen(CS sbuffer)) != 0) |
| 154 | { |
| 155 | fprintf(log, "Comparison failed - bailing out\n"); |
| 156 | goto END_OFF; |
| 157 | } |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /* This could appear in the wrong place in a shared log, so forgo it. */ |
| 162 | /* fprintf(log, "End of script\n"); */ |
| 163 | |
| 164 | END_OFF: |
| 165 | fclose(script); |
| 166 | fclose(log); |
| 167 | |
| 168 | exit(0); |
| 169 | } |
| 170 | |
| 171 | /* End of mtpscript.c */ |