diff options
Diffstat (limited to 'ax25/axspawn.c')
| -rw-r--r-- | ax25/axspawn.c | 142 |
1 files changed, 71 insertions, 71 deletions
diff --git a/ax25/axspawn.c b/ax25/axspawn.c index e8ad0fa..31fddbc 100644 --- a/ax25/axspawn.c +++ b/ax25/axspawn.c @@ -4,18 +4,18 @@ * Copyright (c) 1996 Joerg Reuter DL1BKE (jreuter@poboxes.com) * * This program is a hack. - * + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. - * + * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * It might even kill your cat... ;-) + * It might even kill your cat... ;-) * * Status: alpha (still...) * @@ -28,19 +28,19 @@ * default * * * * * 1 root /usr/local/sbin/axspawn axspawn --wait * * The program will check if the peer is an AX.25 socket, the - * callsign is a valid amateur radio callsign, strip the SSID, + * callsign is a valid amateur radio callsign, strip the SSID, * check if UID/GID are valid, allow a password-less login if the * password-entry in /etc/passwd is "+" or empty; in every other case * login will prompt for a password. * - * Still on my TODO list: a TheNet compatible or MD5 based + * Still on my TODO list: a TheNet compatible or MD5 based * authentication scheme... Won't help you if you changed the "+"-entry - * in /etc/passwd to a valid passord and login with telnet, though. + * in /etc/passwd to a valid passord and login with telnet, though. * A better solution could be a small program called from .profile. * * Axspawn can create user accounts automatically. You may specify * the user shell, first and maximum user id, group ID in the config - * file and (unlike WAMPES) create a file "/usr/local/etc/ax25.profile" + * file and (unlike WAMPES) create a file "/usr/local/etc/ax25.profile" * which will be copied to ~/.profile. * * This is an example for the config file: @@ -126,7 +126,7 @@ * shorter than 6 characters (without SSID). There must be at least * one digit, and max. two digits within the call. The SSID must * be within the range of 0 and 15. Please drop me a note if you - * know a valid Amateur Radio (sic!) callsign that does not fit this + * know a valid Amateur Radio (sic!) callsign that does not fit this * pattern _and_ can be represented correctly in AX.25. * * It uses the forkpty from libbsd.a (found after analyzing logind) @@ -509,7 +509,7 @@ int Strncasecmp(const char *s1, const char *s2, int n) pid_t forkpty(int *, char *, void *, struct winsize *); /* The buffer in src (first byte length-1) is decoded into dest - (first byte length-1). If decoding is not successful, non-0 + (first byte length-1). If decoding is not successful, non-0 is returned */ @@ -522,7 +522,7 @@ int encstathuf(char *src, int srclen, char *dest, int *destlen) int bit8; unsigned short huffcode; int hufflen; - + if ((src == NULL) || (dest == NULL)) { syslog(LOG_NOTICE, "Huffman encode: src or dest NULL!"); return(1); @@ -574,7 +574,7 @@ int encstathuf(char *src, int srclen, char *dest, int *destlen) } /* The buffer in src (first byte length-1) is decoded into dest - (first byte length-1). If decoding is not successful, non-0 + (first byte length-1). If decoding is not successful, non-0 is returned */ @@ -679,11 +679,11 @@ int read_ax25(unsigned char *s, int size) if (bin) { return(len); } - + for (k = 0; k < len; k++) if (s[k] == '\r') s[k] = '\n'; - + if (!huffman && !Strncasecmp(s, "//COMP ON\n", 10)) { sprintf(buffer,"\r//COMP 1\r"); @@ -746,7 +746,7 @@ void kick_wqueue(int dummy) int bufsize = (huffman ? 256-1 : paclen); char decoded[260]; int declen; - + signal(SIGALRM, SIG_IGN); itv.it_value.tv_sec = 0; itv.it_value.tv_usec = QUEUE_DELAY; @@ -767,7 +767,7 @@ void kick_wqueue(int dummy) } p = s; s_len = 0; - + while ((w_buf = wqueue_head)) { curr_len = (w_buf->len > bufsize-s_len ? bufsize-s_len : w_buf->len); memcpy(p, w_buf->data, curr_len); @@ -821,7 +821,7 @@ void kick_wqueue(int dummy) wqueue_head = w_buf->next; free(w_buf->data); free(w_buf); - + if (!wqueue_head) { wqueue_tail = NULL; return; @@ -833,7 +833,7 @@ void kick_wqueue(int dummy) * new data is available in order to send "full packets" */ if (wqueue_length < paclen) - break; + break; } itv.it_interval.tv_sec = 0; @@ -855,7 +855,7 @@ int write_ax25(char *s, int len, int kick) int i = 0; int j = 0; char *p; - + if (!len) return 0; signal(SIGALRM, SIG_IGN); @@ -888,7 +888,7 @@ int write_ax25(char *s, int len, int kick) tcsetattr(0, TCSANOW, &save_termios); last_ended_with_CR = 0; return 0; - } + } if (!bin) { @@ -915,7 +915,7 @@ int write_ax25(char *s, int len, int kick) } else *(p + i) = *(p + j); - i++; j++; + i++; j++; } len = i; if (len && s[len-1] == '\r') @@ -935,8 +935,8 @@ int write_ax25(char *s, int len, int kick) memcpy(buf->data, s, len); buf->len = len; - buf->next = NULL; - + buf->next = NULL; + if (wqueue_head == NULL) { wqueue_head = buf; @@ -947,7 +947,7 @@ int write_ax25(char *s, int len, int kick) wqueue_tail = buf; wqueue_length += len; } - + if (wqueue_length > 7*paclen || kick || bin) { kick_wqueue(0); @@ -967,12 +967,12 @@ int get_assoc(struct sockaddr_ax25 *sax25) FILE *fp; int uid; char buf[81]; - + fp = fopen(PROC_AX25_CALLS_FILE, "r"); if (!fp) return -1; - + fgets(buf, sizeof(buf)-1, fp); - + while(!feof(fp)) { if (fscanf(fp, "%d %s", &uid, buf) == 2) @@ -984,7 +984,7 @@ int get_assoc(struct sockaddr_ax25 *sax25) } } fclose(fp); - + return -1; } @@ -1020,7 +1020,7 @@ void cleanup(char *tty) } -/* +/* * add a new user to /etc/passwd and do some init */ @@ -1040,7 +1040,7 @@ void new_user(char *newuser) struct stat fst; int fd_a, fd_b, fd_l; mode_t homedir_mode = S_IRUSR|S_IWUSR|S_IXUSR|S_IXOTH|(secure_home ? 0 : (S_IRGRP|S_IXGRP)); - + /* * build path for home directory */ @@ -1072,9 +1072,9 @@ retry: /* * build directories for home */ - + p = homedir; - + while (*p == '/') p++; chdir("/"); @@ -1117,12 +1117,12 @@ retry: { chown(p, uid, user_gid); chmod(p, homedir_mode); - } + } } else goto out; } - + if (chdir(p) < 0) goto out; p = q; @@ -1157,7 +1157,7 @@ end_mkdirs: fp = fopen(PASSWDFILE, "a+"); if (fp == NULL) goto out; - + pw.pw_name = newuser; pw.pw_passwd = ((policy_add_empty_password) ? "" : "+"); pw.pw_uid = uid; @@ -1165,12 +1165,12 @@ end_mkdirs: pw.pw_gecos = username; pw.pw_dir = userdir; pw.pw_shell = user_shell; - + if (getpwuid(uid) != NULL) goto retry; /* oops?! */ if (putpwent(&pw, fp) < 0) goto out; - + fclose(fp); } @@ -1179,7 +1179,7 @@ end_mkdirs: */ fd_a = open(CONF_AXSPAWN_PROF_FILE, O_RDONLY); - + if (fd_a > 0) { int first = 1; @@ -1187,7 +1187,7 @@ end_mkdirs: if (fd_b < 0) goto out; - + /* just 2b sure */ if (lseek(fd_b, 0L, SEEK_END) > 0L) write(fd_b, "\n", 1); @@ -1222,16 +1222,16 @@ void read_config(void) char buf[512]; char cmd[40], param[80]; char *p; - + if (fp == NULL) return; - + while (!feof(fp)) { fgets(buf, sizeof(buf), fp); p = strchr(buf, '#'); if (p) *p='\0'; - + if (buf[0] != '\0') { sscanf(buf, "%s %s", cmd, param); @@ -1297,12 +1297,12 @@ void read_config(void) } else if (!strncmp(cmd, "secure_home", 11)) { secure_home = (param[0] == 'y'); - } else + } else if (!strncmp(cmd, "assoc", 5)) { if (!strcmp(param, "yes")) policy_associate = 1; - else + else policy_associate = 0; } else if (!strncmp(cmd, "shell", 5)) @@ -1315,7 +1315,7 @@ void read_config(void) } } } - + fclose(fp); } @@ -1328,7 +1328,7 @@ void signal_handler(int dummy) cleanup(ptyslave+5); exit(1); } - + int main(int argc, char **argv) { char call[20], user[20], as_user[20]; @@ -1400,7 +1400,7 @@ int main(int argc, char **argv) } } strupr(prompt); - + openlog("axspawn", LOG_PID, LOG_DAEMON); if (getuid() != 0) { @@ -1411,7 +1411,7 @@ int main(int argc, char **argv) addrlen = sizeof(struct full_sockaddr_ax25); k = getpeername(0, (struct sockaddr *) &sockaddr, &addrlen); - + if (k < 0) { syslog(LOG_NOTICE, "getpeername: %m\n"); return 1; @@ -1457,7 +1457,7 @@ int main(int argc, char **argv) { ssid *= 10; ssid += (int) (call[k] - '0'); - + if (ssid > 15) invalid++; } ssidcnt++; @@ -1481,7 +1481,7 @@ int main(int argc, char **argv) else invalid++; } - + if ( invalid || (k < MINLEN) || (digits > 2) || (digits < 1) ) { write_ax25_static_line(MSG_NOCALL); @@ -1489,7 +1489,7 @@ int main(int argc, char **argv) sleep(EXITDELAY); return 1; } - + if (wait_for_tcp) { /* incoming TCP/IP connection? */ if (read_ax25(buf, sizeof(buf)) < 0) @@ -1522,7 +1522,7 @@ int main(int argc, char **argv) user_changed = 1; } } - + if (!*as_user) strcpy(as_user, user); pw = getpwnam(as_user); @@ -1536,13 +1536,13 @@ int main(int argc, char **argv) return 1; } - if (policy_add_user) + if (policy_add_user) { new_user(as_user); pw = getpwnam(as_user); endpwent(); } - + if (pw == NULL && policy_guest) { strcpy(as_user,guest); @@ -1557,7 +1557,7 @@ int main(int argc, char **argv) sleep(EXITDELAY); return 1; } - + if (!rootlogin && (pw->pw_uid == 0 || pw->pw_gid == 0)) { write_ax25_static_line(MSG_NOCALL); @@ -1565,7 +1565,7 @@ int main(int argc, char **argv) sleep(EXITDELAY); return 1; } - + again: if (!(pwd = read_pwd(pw, &pwtype))) { if ((!pwtype || pwtype != PW_CLEARTEXT) && (pwtype != PW_UNIX)) { @@ -1649,18 +1649,18 @@ again: close(fds); } } - + fcntl(1, F_SETFL, O_NONBLOCK); - + pid = forkpty(&fdmaster, ptyslave, NULL, &win); - + if (pid == 0) { struct termios termios; char *shell = "/bin/sh"; memset((char *) &termios, 0, sizeof(termios)); - + ioctl(0, TIOCSCTTY, (char *) 0); termios.c_iflag = ICRNL | IXOFF; @@ -1686,7 +1686,7 @@ again: gettimeofday(&tv, NULL); ut_line.ut_tv.tv_sec = tv.tv_sec; ut_line.ut_tv.tv_usec = tv.tv_usec; - ut_line.ut_addr = 0; + ut_line.ut_addr = 0; pututline(&ut_line); endutent(); @@ -1731,7 +1731,7 @@ again: if (p[1]) { if ((p = strdup(p))) *p = '-'; - + } else p = 0; } if (!p) @@ -1773,7 +1773,7 @@ again: */ chargv[chargc++] = "-h"; chargv[chargc++] = protocol; - if (pwtype != PW_CLEARTEXT /* PW_SYS or PW_MD5 are already authenticated */ + if (pwtype != PW_CLEARTEXT /* PW_SYS or PW_MD5 are already authenticated */ || pwcheck == 2 || (pwcheck == 3 && (pw->pw_gid == user_gid || is_guest)) || !strcmp(pw->pw_passwd, "+")) chargv[chargc++] = "-f"; chargv[chargc++] = as_user; @@ -1816,7 +1816,7 @@ again: signal(SIGTERM, signal_handler); signal(SIGINT, signal_handler); signal(SIGQUIT, signal_handler); - + while(1) { FD_ZERO(&fds_read); @@ -1826,9 +1826,9 @@ again: if (wqueue_length <= paclen*7) FD_SET(fdmaster, &fds_read); FD_SET(fdmaster, &fds_err); - + k = select(fdmaster+1, &fds_read, NULL, &fds_err, NULL); - + if (k > 0) { if (FD_ISSET(0, &fds_err)) @@ -1842,9 +1842,9 @@ again: cleanup(ptyslave+5); return 1; } - + if (FD_ISSET(fdmaster, &fds_err)) - { + { /* give the last packet in the timer controlled sendqueue a chance.. */ if (wqueue_length) { continue; @@ -1869,7 +1869,7 @@ again: } else write(fdmaster, buf, cnt); } - + if (FD_ISSET(fdmaster, &fds_read)) { cnt = read(fdmaster, buf, (huffman ? 254 : sizeof(buf))); @@ -1889,7 +1889,7 @@ again: } write_ax25(buf, cnt, 0); } - } else + } else if (k < 0 && errno != EINTR) { if (huffman) { @@ -1903,7 +1903,7 @@ again: return 0; } } - } + } else { write_ax25_static_line(MSG_CANNOTFORK); @@ -1911,7 +1911,7 @@ again: sleep(EXITDELAY); return 1; } - + sleep(EXITDELAY); return 0; |