#include "sig.h"
#include "readwrite.h"
-#include "getln.h"
#include "stralloc.h"
#include "substdio.h"
#include "alloc.h"
#include "qmail.h"
#include "str.h"
#include "fmt.h"
+#include "scan.h"
#include "byte.h"
#include "case.h"
#include "env.h"
#include "now.h"
#include "exit.h"
+#include "rcpthosts.h"
+#include "addrcheck.h"
+#include "timeoutread.h"
+#include "timeoutwrite.h"
+#include "commands.h"
#define MAXHOPS 100
+unsigned int databytes = 0;
int timeout = 1200;
-char ssoutbuf[512];
-substdio ssout = SUBSTDIO_FDBUF(write,1,ssoutbuf,sizeof(ssoutbuf));
-
-void die() { substdio_flush(&ssout); _exit(1); }
-void flush() { if (substdio_flush(&ssout) == -1) _exit(1); }
-void out(s) char *s; { if (substdio_puts(&ssout,s) == -1) die(); }
-
-int timeoutread(fd,buf,n) int fd; char *buf; int n;
+int safewrite(fd,buf,len) int fd; char *buf; int len;
{
- int r; int saveerrno;
- flush();
- alarm(timeout);
- r = read(fd,buf,n); saveerrno = errno;
- alarm(0);
- errno = saveerrno; return r;
+ int r;
+ r = timeoutwrite(timeout,fd,buf,len);
+ if (r <= 0) _exit(1);
+ return r;
}
-char ssinbuf[1024];
-substdio ssin = SUBSTDIO_FDBUF(timeoutread,0,ssinbuf,sizeof(ssinbuf));
+char ssoutbuf[512];
+substdio ssout = SUBSTDIO_FDBUF(safewrite,1,ssoutbuf,sizeof ssoutbuf);
+void flush() { substdio_flush(&ssout); }
+void out(s) char *s; { substdio_puts(&ssout,s); }
-void outofmem() { out("421 out of memory (#4.3.0)\r\n"); die(); }
-void sigalrm() { out("451 timeout (#4.4.2)\r\n"); die(); }
+void die_read() { _exit(1); }
+void die_alarm() { out("451 timeout (#4.4.2)\r\n"); flush(); _exit(1); }
+void die_nomem() { out("421 out of memory (#4.3.0)\r\n"); flush(); _exit(1); }
+void die_control() { out("421 unable to read controls (#4.3.0)\r\n"); flush(); _exit(1); }
+void die_ipme() { out("421 unable to figure out my IP addresses (#4.3.0)\r\n"); flush(); _exit(1); }
+void die_badaddr() { out("553 too many bad recipients: sulking (#5.5.1)\r\n"); flush(); _exit(1); }
+void straynewline() { out("451 See http://pobox.com/~djb/docs/smtplf.html.\r\n"); flush(); _exit(1); }
-struct qmail qqt;
-stralloc greeting = {0};
-int liphostok = 0;
-stralloc liphost = {0};
-int rhok = 0;
-stralloc rcpthosts = {0};
-struct constmap maprcpthosts;
-int bmfok = 0;
-stralloc bmf = {0};
-struct constmap mapbmf;
-int flagbarf; /* defined if seenmail */
+void err_bmf() { out("553 sorry, your envelope sender is in my badmailfrom list (#5.7.1)\r\n"); }
+void err_nogateway() { out("553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)\r\n"); }
+void err_badaddr() { out("550 unknown mailbox (#5.1.1)\r\n"); }
+void err_unimpl() { out("502 unimplemented (#5.5.1)\r\n"); }
+void err_syntax() { out("555 syntax error (#5.5.4)\r\n"); }
+void err_wantmail() { out("503 MAIL first (#5.5.1)\r\n"); }
+void err_wantrcpt() { out("503 RCPT first (#5.5.1)\r\n"); }
+void err_noop() { out("250 ok\r\n"); }
+void err_vrfy() { out("252 send some mail, i'll try my best\r\n"); }
+void err_qqt() { out("451 qqt failure (#4.3.0)\r\n"); }
-stralloc helohost = {0};
-stralloc mailfrom = {0};
-stralloc rcptto = {0};
-int seenmail = 0;
-stralloc addr = {0}; /* will be 0-terminated, if addrparse returns 1 */
+stralloc greeting = {0};
+
+void smtp_greet(code) char *code;
+{
+ substdio_puts(&ssout,code);
+ substdio_put(&ssout,greeting.s,greeting.len);
+}
+void smtp_help()
+{
+ out("214 qmail home page: http://pobox.com/~djb/qmail.html\r\n");
+}
+void smtp_quit()
+{
+ smtp_greet("221 "); out("\r\n"); flush(); _exit(0);
+}
char *remoteip;
char *remotehost;
char *local;
char *relayclient;
-void dohelo(arg) char *arg;
-{
- if (!stralloc_copys(&helohost,arg)) outofmem();
- if (!stralloc_0(&helohost)) outofmem();
-}
+stralloc helohost = {0};
+char *fakehelo; /* pointer into helohost, or 0 */
-void getenvs()
-{
- remoteip = env_get("TCPREMOTEIP");
- if (!remoteip) remoteip = "unknown";
- local = env_get("TCPLOCALHOST");
- if (!local) local = env_get("TCPLOCALIP");
- if (!local) local = "unknown";
- remotehost = env_get("TCPREMOTEHOST");
- if (!remotehost) remotehost = "unknown";
- remoteinfo = env_get("TCPREMOTEINFO");
- relayclient = env_get("RELAYCLIENT");
- dohelo(remotehost);
+void dohelo(arg) char *arg; {
+ if (!stralloc_copys(&helohost,arg)) die_nomem();
+ if (!stralloc_0(&helohost)) die_nomem();
+ fakehelo = case_diffs(remotehost,helohost.s) ? helohost.s : 0;
}
-void straynewline()
-{
- out("451 \
-Put ,E=\\r\\n at the end of Mether, Mtcp, or Msmtp in sendmail.cf \
-if you are using Solaris 2.5 (fixed in 2.5.1). \
-I cannot accept messages with stray newlines. \
-Many SMTP servers will time out waiting for \\r\\n.\\r\\n.\
-\r\n");
- die();
-}
+int liphostok = 0;
+stralloc liphost = {0};
+int relayhostsok = 0;
+stralloc relayhosts = {0};
+struct constmap maprelayhosts;
+int bmfok = 0;
+stralloc bmf = {0};
+struct constmap mapbmf;
+static int ac_slow = 5;
+static int ac_limit = 50;
+static int ac_delay = 2;
+static int ac_count = 0;
+static int ac_fd = -1;
-void blast(ssfrom,hops)
-substdio *ssfrom;
-int *hops;
+void setup()
{
- char ch;
- int state;
- int flaginheader;
- int pos; /* number of bytes since most recent \n, if fih */
- int flagmaybex; /* 1 if this line might match RECEIVED, if fih */
- int flagmaybey; /* 1 if this line might match \r\n, if fih */
- int flagmaybez; /* 1 if this line might match DELIVERED, if fih */
-
- state = 1;
- *hops = 0;
- flaginheader = 1;
- pos = 0; flagmaybex = flagmaybey = flagmaybez = 1;
- for (;;)
- {
- if (substdio_get(ssfrom,&ch,1) <= 0) die();
- if (flaginheader)
- {
- if (pos < 9)
- {
- if (ch != "delivered"[pos]) if (ch != "DELIVERED"[pos]) flagmaybez = 0;
- if (flagmaybez) if (pos == 8) ++*hops;
- if (pos < 8)
- if (ch != "received"[pos]) if (ch != "RECEIVED"[pos]) flagmaybex = 0;
- if (flagmaybex) if (pos == 7) ++*hops;
- if (pos < 2) if (ch != "\r\n"[pos]) flagmaybey = 0;
- if (flagmaybey) if (pos == 1) flaginheader = 0;
- }
- ++pos;
- if (ch == '\n') { pos = 0; flagmaybex = flagmaybey = flagmaybez = 1; }
- }
- switch(state)
- {
- case 0:
- if (ch == '\n') straynewline();
- if (ch == '\r') { state = 4; continue; }
- break;
- case 1: /* \r\n */
- if (ch == '\n') straynewline();
- if (ch == '.') { state = 2; continue; }
- if (ch == '\r') { state = 4; continue; }
- state = 0;
- break;
- case 2: /* \r\n + . */
- if (ch == '\n') straynewline();
- if (ch == '\r') { state = 3; continue; }
- state = 0;
- break;
- case 3: /* \r\n + .\r */
- if (ch == '\n') return;
- qmail_put(&qqt,".\r",2);
- if (ch == '\r') { state = 4; continue; }
- state = 0;
- break;
- case 4: /* + \r */
- if (ch == '\n') { state = 1; break; }
- if (ch != '\r') { qmail_put(&qqt,"\r",1); state = 0; }
+ char *x;
+ unsigned long u;
+
+ if (control_init() == -1) die_control();
+ if (control_rldef(&greeting,"control/smtpgreeting",1,(char *) 0) != 1)
+ die_control();
+ liphostok = control_rldef(&liphost,"control/localiphost",1,(char *) 0);
+ if (liphostok == -1) die_control();
+ if (control_readint(&timeout,"control/timeoutsmtpd") == -1) die_control();
+ if (timeout <= 0) timeout = 1;
+
+ if (rcpthosts_init() == -1) die_control();
+
+ bmfok = control_readfile(&bmf,"control/badmailfrom",0);
+ if (bmfok == -1) die_control();
+ if (bmfok)
+ if (!constmap_init(&mapbmf,bmf.s,bmf.len,0)) die_nomem();
+
+ switch (control_readfile(&relayhosts, "control/relayhosts", 0)) {
+ case -1:
+ die_control();
+ case 1:
+ relayhostsok = 1;
+ if (!constmap_init(&maprelayhosts, relayhosts.s, relayhosts.len, 1))
+ die_nomem();
+ }
+
+ if (control_readint(&ac_slow, "control/addrcheck-slow") == -1 ||
+ control_readint(&ac_slow, "control/addrcheck-limit") == -1 ||
+ control_readint(&ac_slow, "control/addrcheck-delay") == -1)
+ die_control();
+
+ if ((ac_fd = open_read("control/addrcheck.cdb")) < 0 && errno != error_noent)
+ die_control();
+
+ if (control_readint(&databytes,"control/databytes") == -1) die_control();
+ x = env_get("DATABYTES");
+ if (x) { scan_ulong(x,&u); databytes = u; }
+ if (!(databytes + 1)) --databytes;
+
+ remoteip = env_get("TCPREMOTEIP");
+ if (!remoteip) remoteip = "unknown";
+ local = env_get("TCPLOCALHOST");
+ if (!local) local = env_get("TCPLOCALIP");
+ if (!local) local = "unknown";
+ remotehost = env_get("TCPREMOTEHOST");
+ if (!remotehost) remotehost = "unknown";
+ remoteinfo = env_get("TCPREMOTEINFO");
+ relayclient = env_get("RELAYCLIENT");
+ if (!relayclient && relayhostsok) {
+ int j;
+ int l = str_len(remotehost);
+ relayclient = constmap(&maprelayhosts, remotehost, l);
+ if (!relayclient) for (j = 0; j < l; ++j) {
+ if (remotehost[j] == '.' &&
+ (relayclient = constmap(&maprelayhosts,
+ remotehost + j,
+ l - j)) != 0)
+ break;
}
- qmail_put(&qqt,&ch,1);
}
+ dohelo(remotehost);
}
+
+stralloc addr = {0}; /* will be 0-terminated, if addrparse returns 1 */
+
int addrparse(arg)
char *arg;
{
- int i;
- char ch;
- struct ip_address ip;
- int flagesc;
- int flagquoted;
-
- arg += str_chr(arg,'<');
- if (*arg != '<') return 0;
- ++arg;
-
- /* strip source route */
- if (*arg == '@') while (*arg) if (*arg++ == ':') break;
-
- if (!*arg) return 0;
- if (!stralloc_copys(&addr,"")) outofmem();
- flagesc = 0;
- flagquoted = 0;
- for (i = 0;ch = arg[i];++i) /* copy arg to addr, stripping quotes */
- {
- if (flagesc)
- { if (!stralloc_append(&addr,&ch)) outofmem(); flagesc = 0; }
- else
- {
- if (!flagquoted && (ch == '>')) break;
- switch(ch)
- {
- case '\\': flagesc = 1; break;
- case '"': flagquoted = !flagquoted; break;
- default: if (!stralloc_append(&addr,&ch)) outofmem();
+ int i;
+ char ch;
+ char terminator;
+ struct ip_address ip;
+ int flagesc;
+ int flagquoted;
+
+ terminator = '>';
+ i = str_chr(arg,'<');
+ if (arg[i])
+ arg += i + 1;
+ else { /* partner should go read rfc 821 */
+ terminator = ' ';
+ arg += str_chr(arg,':');
+ if (*arg == ':') ++arg;
+ while (*arg == ' ') ++arg;
+ }
+
+ /* strip source route */
+ if (*arg == '@') while (*arg) if (*arg++ == ':') break;
+
+ if (!stralloc_copys(&addr,"")) die_nomem();
+ flagesc = 0;
+ flagquoted = 0;
+ for (i = 0;ch = arg[i];++i) { /* copy arg to addr, stripping quotes */
+ if (flagesc) {
+ if (!stralloc_append(&addr,&ch)) die_nomem();
+ flagesc = 0;
+ }
+ else {
+ if (!flagquoted && (ch == terminator)) break;
+ switch(ch) {
+ case '\\': flagesc = 1; break;
+ case '"': flagquoted = !flagquoted; break;
+ default: if (!stralloc_append(&addr,&ch)) die_nomem();
}
}
}
- if (!ch) return 0;
- if (!stralloc_append(&addr,"")) outofmem();
- ++i;
- while (arg[i])
- {
- if (!case_diffs(arg + i," BODY=8BITMIME")) i += 14;
- else if (!case_diffs(arg + i," BODY=7BIT")) i += 10;
- else return 0;
- }
-
- if (liphostok)
- {
- i = byte_rchr(addr.s,addr.len,'@');
- if (i < addr.len) /* if not, partner should go read rfc 821 */
- if (addr.s[i + 1] == '[')
- if (!addr.s[i + 1 + ip_scanbracket(addr.s + i + 1,&ip)])
- if (ipme_is(&ip))
- {
- addr.len = i + 1;
- if (!stralloc_cat(&addr,&liphost)) outofmem();
- if (!stralloc_0(&addr)) outofmem();
+ /* could check for termination failure here, but why bother? */
+ if (!stralloc_append(&addr,"")) die_nomem();
+
+ if (liphostok) {
+ i = byte_rchr(addr.s,addr.len,'@');
+ if (i < addr.len) /* if not, partner should go read rfc 821 */
+ if (addr.s[i + 1] == '[')
+ if (!addr.s[i + 1 + ip_scanbracket(addr.s + i + 1,&ip)])
+ if (ipme_is(&ip)) {
+ addr.len = i + 1;
+ if (!stralloc_cat(&addr,&liphost)) die_nomem();
+ if (!stralloc_0(&addr)) die_nomem();
}
}
- return 1;
+ if (addr.len > 900) return 0;
+ return 1;
}
-int addrallowed()
+int bmfcheck()
{
- int j;
- if (!rhok) return 1;
- j = byte_rchr(addr.s,addr.len,'@');
- if (j >= addr.len) return 1; /* can be taken care of by envnoathost */
- if (constmap(&maprcpthosts,addr.s + j + 1,addr.len - j - 2)) return 1;
- for (;j < addr.len;++j)
- if (addr.s[j] == '.')
- if (constmap(&maprcpthosts,addr.s + j,addr.len - j - 1)) return 1;
- return 0;
+ int j;
+ if (!bmfok) return 0;
+ if (constmap(&mapbmf,addr.s,addr.len - 1)) return 1;
+ j = byte_rchr(addr.s,addr.len,'@');
+ if (j < addr.len)
+ if (constmap(&mapbmf,addr.s + j,addr.len - j - 1)) return 1;
+ return 0;
}
-void bmfcheck()
+int addrallowed()
{
- int j;
- flagbarf = 0;
- if (!bmfok) return;
- if (constmap(&mapbmf,addr.s,addr.len - 1)) { flagbarf = 1; return; }
- j = byte_rchr(addr.s,addr.len,'@');
- if (j < addr.len)
- if (constmap(&mapbmf,addr.s + j,addr.len - j - 1)) flagbarf = 1;
+ int r;
+ r = rcpthosts(addr.s,str_len(addr.s));
+ if (r == -1) die_control();
+ return r;
}
-void smtp_greet(code) char *code; {
- if (substdio_puts(&ssout,code) == -1) die();
- if (substdio_put(&ssout,greeting.s,greeting.len) == -1) die(); }
-void smtp_quit() { smtp_greet("221 "); out("\r\n"); die(); }
-void smtp_help() { out("214-qmail home page: http://pobox.com/~djb/qmail.html\r\n214 send comments to qmail@pobox.com\r\n"); }
-void err_syntax() { out("555 syntax error (#5.5.4)\r\n"); }
-void err_bmf() { out("553 sorry, your envelope sender is in my badmailfrom list (#5.7.1)\r\n"); }
-void err_nogateway() { out("553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)\r\n"); }
-void err_unimpl() { out("502 unimplemented (#5.5.1)\r\n"); }
-void err_seenmail() { out("503 one MAIL per message (#5.5.1)\r\n"); }
-void err_wantmail() { out("503 MAIL first (#5.5.1)\r\n"); }
-void err_wantrcpt() { out("503 RCPT first (#5.5.1)\r\n"); }
-void err_noop() { out("250 ok\r\n"); }
-void err_vrfy() { out("252 send some mail, i'll try my best\r\n"); }
-void err_qqt() { out("451 qqt failure (#4.3.0)\r\n"); }
-void smtp_helo(arg) char *arg; {
- smtp_greet("250-"); out("\r\n250-PIPELINING\r\n250 8BITMIME\r\n");
- seenmail = 0;
- dohelo(arg ? arg : ""); }
-void smtp_rset() {
- seenmail = 0;
- out("250 flushed\r\n"); }
-void smtp_mail(arg) char *arg; {
- if (seenmail) { err_seenmail(); return; }
- if (!arg) { err_syntax(); return; }
- if (!addrparse(arg)) { err_syntax(); return; }
- bmfcheck();
- seenmail = 1; out("250 ok\r\n");
- if (!stralloc_copys(&rcptto,"")) outofmem();
- if (!stralloc_copys(&mailfrom,addr.s)) outofmem();
- if (!stralloc_0(&mailfrom)) outofmem(); }
+
+int seenmail = 0;
+int flagbarf; /* defined if seenmail */
+stralloc mailfrom = {0};
+stralloc rcptto = {0};
+
+void smtp_helo(arg) char *arg;
+{
+ smtp_greet("250 "); out("\r\n");
+ seenmail = 0; dohelo(arg);
+}
+void smtp_ehlo(arg) char *arg;
+{
+ smtp_greet("250-"); out("\r\n250-PIPELINING\r\n250 8BITMIME\r\n");
+ seenmail = 0; dohelo(arg);
+}
+void smtp_rset()
+{
+ seenmail = 0;
+ out("250 flushed\r\n");
+}
+void smtp_mail(arg) char *arg;
+{
+ if (!addrparse(arg)) { err_syntax(); return; }
+ flagbarf = bmfcheck();
+ seenmail = 1;
+ if (!stralloc_copys(&rcptto,"")) die_nomem();
+ if (!stralloc_copys(&mailfrom,addr.s)) die_nomem();
+ if (!stralloc_0(&mailfrom)) die_nomem();
+ out("250 ok\r\n");
+}
void smtp_rcpt(arg) char *arg; {
- if (!seenmail) { err_wantmail(); return; }
- if (!arg) { err_syntax(); return; }
- if (!addrparse(arg)) { err_syntax(); return; }
- if (flagbarf) { err_bmf(); return; }
- if (relayclient)
- {
- --addr.len;
- if (!stralloc_cats(&addr,relayclient)) outofmem();
- if (!stralloc_0(&addr)) outofmem();
+ if (!seenmail) { err_wantmail(); return; }
+ if (!addrparse(arg)) { err_syntax(); return; }
+ if (flagbarf) { err_bmf(); return; }
+ if (relayclient) {
+ --addr.len;
+ if (!stralloc_cats(&addr,relayclient)) die_nomem();
+ if (!stralloc_0(&addr)) die_nomem();
+ }
+ else
+ if (!addrallowed()) { err_nogateway(); return; }
+ if (ac_fd != -1) {
+ int rc;
+ if (addrcheck(ac_fd, addr.s, mailfrom.s, &rc) < 0) {
+ if (errno == error_nomem)
+ die_nomem();
+ else
+ die_control();
+ }
+ if (!rc) {
+ ac_count++;
+ if (ac_limit && ac_count >= ac_limit) die_badaddr();
+ if (ac_delay && ac_count >= ac_slow) sleep(ac_delay);
+ err_badaddr();
+ return;
+ }
}
- else
- if (!addrallowed()) { err_nogateway(); return; }
- out("250 ok\r\n");
- if (!stralloc_cats(&rcptto,"T")) outofmem();
- if (!stralloc_cats(&rcptto,addr.s)) outofmem();
- if (!stralloc_0(&rcptto)) outofmem(); }
+ if (!stralloc_cats(&rcptto,"T")) die_nomem();
+ if (!stralloc_cats(&rcptto,addr.s)) die_nomem();
+ if (!stralloc_0(&rcptto)) die_nomem();
+ out("250 ok\r\n");
+}
-char accept_buf[FMT_ULONG];
-void acceptmessage(qp) unsigned long qp;
+
+int saferead(fd,buf,len) int fd; char *buf; int len;
{
- datetime_sec when;
- when = now();
- out("250 ok ");
- accept_buf[fmt_ulong(accept_buf,(unsigned long) when)] = 0;
- out(accept_buf);
- out(" qp ");
- accept_buf[fmt_ulong(accept_buf,qp)] = 0;
- out(accept_buf);
- out("\r\n");
+ int r;
+ flush();
+ r = timeoutread(timeout,fd,buf,len);
+ if (r == -1) if (errno == error_timeout) die_alarm();
+ if (r <= 0) die_read();
+ return r;
}
-void smtp_data() {
- int hops; int r; unsigned long qp;
- if (!seenmail) { err_wantmail(); return; }
- if (!rcptto.len) { err_wantrcpt(); return; }
- seenmail = 0;
- if (qmail_open(&qqt) == -1) { err_qqt(); return; }
- qp = qmail_qp(&qqt);
- out("354 go ahead\r\n");
-
- received(&qqt,"SMTP",local,remoteip,remotehost,remoteinfo,case_diffs(remotehost,helohost.s) ? helohost.s : 0);
- blast(&ssin,&hops);
- hops = (hops >= MAXHOPS);
- if (hops) qmail_fail(&qqt);
- qmail_from(&qqt,mailfrom.s);
- qmail_put(&qqt,rcptto.s,rcptto.len);
-
- r = qmail_close(&qqt);
- if (!r) { acceptmessage(qp); return; }
- if (hops) { out("554 too many hops, this message is looping (#5.4.6)\r\n"); return; }
- switch(r)
- {
- case QMAIL_TOOLONG: out("554 address too long (#5.1.3)\r\n"); return;
- case QMAIL_SYS: out("451 qq system error (#4.3.0)\r\n"); return;
- case QMAIL_READ: out("451 qq read error (#4.3.0)\r\n"); return;
- case QMAIL_WRITE: out("451 qq write error or disk full (#4.3.0)\r\n"); return;
- case QMAIL_NOMEM: out("451 qq out of memory (#4.3.0)\r\n"); return;
- case QMAIL_EXECSOFT: out("451 could not exec qq (#4.3.0)\r\n"); return;
- case QMAIL_TIMEOUT: out("451 qq timeout (#4.3.0)\r\n"); return;
- case QMAIL_WAITPID: out("451 qq waitpid surprise (#4.3.0)\r\n"); return;
- case QMAIL_CRASHED: out("451 qq crashed (#4.3.0)\r\n"); return;
- case QMAIL_USAGE: out("451 qq usage surprise (#4.3.0)\r\n"); return;
- default: out("451 qq internal bug (#4.3.0)\r\n"); return;
- }
+char ssinbuf[1024];
+substdio ssin = SUBSTDIO_FDBUF(saferead,0,ssinbuf,sizeof ssinbuf);
+
+struct qmail qqt;
+unsigned int bytestooverflow = 0;
+
+void put(ch)
+char *ch;
+{
+ if (bytestooverflow)
+ if (!--bytestooverflow)
+ qmail_fail(&qqt);
+ qmail_put(&qqt,ch,1);
}
-static struct { void (*fun)(); char *text; int flagflush; } smtpcmd[] = {
- { smtp_rcpt, "rcpt", 0 }
-, { smtp_mail, "mail", 0 }
-, { smtp_data, "data", 1 }
-, { smtp_quit, "quit", 1 }
-, { smtp_helo, "helo", 1 }
-, { smtp_helo, "ehlo", 1 }
-, { smtp_rset, "rset", 0 }
-, { smtp_help, "help", 1 }
-, { err_noop, "noop", 1 }
-, { err_vrfy, "vrfy", 1 }
-, { 0, 0, 0 }
-};
-
-void doit(cmd)
-char *cmd;
+void blast(hops)
+int *hops;
{
- int i;
- int j;
- char ch;
-
- for (i = 0;smtpcmd[i].fun;++i)
- {
- for (j = 0;ch = smtpcmd[i].text[j];++j)
- if ((cmd[j] != ch) && (cmd[j] != ch - 32))
- break;
- if (!ch)
- if (!cmd[j] || (cmd[j] == ' '))
- {
- while (cmd[j] == ' ') ++j;
- if (!cmd[j])
- smtpcmd[i].fun((char *) 0);
- else
- smtpcmd[i].fun(cmd + j);
- if (smtpcmd[i].flagflush) flush();
- return;
+ char ch;
+ int state;
+ int flaginheader;
+ int pos; /* number of bytes since most recent \n, if fih */
+ int flagmaybex; /* 1 if this line might match RECEIVED, if fih */
+ int flagmaybey; /* 1 if this line might match \r\n, if fih */
+ int flagmaybez; /* 1 if this line might match DELIVERED, if fih */
+
+ state = 1;
+ *hops = 0;
+ flaginheader = 1;
+ pos = 0; flagmaybex = flagmaybey = flagmaybez = 1;
+ for (;;) {
+ substdio_get(&ssin,&ch,1);
+ if (flaginheader) {
+ if (pos < 9) {
+ if (ch != "delivered"[pos]) if (ch != "DELIVERED"[pos]) flagmaybez = 0;
+ if (flagmaybez) if (pos == 8) ++*hops;
+ if (pos < 8)
+ if (ch != "received"[pos]) if (ch != "RECEIVED"[pos]) flagmaybex = 0;
+ if (flagmaybex) if (pos == 7) ++*hops;
+ if (pos < 2) if (ch != "\r\n"[pos]) flagmaybey = 0;
+ if (flagmaybey) if (pos == 1) flaginheader = 0;
}
+ ++pos;
+ if (ch == '\n') { pos = 0; flagmaybex = flagmaybey = flagmaybez = 1; }
+ }
+ switch(state) {
+ case 0:
+ if (ch == '\n') straynewline();
+ if (ch == '\r') { state = 4; continue; }
+ break;
+ case 1: /* \r\n */
+ if (ch == '\n') straynewline();
+ if (ch == '.') { state = 2; continue; }
+ if (ch == '\r') { state = 4; continue; }
+ state = 0;
+ break;
+ case 2: /* \r\n + . */
+ if (ch == '\n') straynewline();
+ if (ch == '\r') { state = 3; continue; }
+ state = 0;
+ break;
+ case 3: /* \r\n + .\r */
+ if (ch == '\n') return;
+ put(".");
+ put("\r");
+ if (ch == '\r') { state = 4; continue; }
+ state = 0;
+ break;
+ case 4: /* + \r */
+ if (ch == '\n') { state = 1; break; }
+ if (ch != '\r') { put("\r"); state = 0; }
+ }
+ put(&ch);
}
- err_unimpl();
- flush();
}
-void getcontrols()
+char accept_buf[FMT_ULONG];
+void acceptmessage(qp) unsigned long qp;
{
- if (control_init() == -1) die();
- if (control_rldef(&greeting,"control/smtpgreeting",1,(char *) 0) != 1) die();
- switch(control_rldef(&liphost,"control/localiphost",1,(char *) 0))
- { case -1: die(); case 1: liphostok = 1; }
- if (control_readint(&timeout,"control/timeoutsmtpd") == -1) die();
- if (timeout <= 0) timeout = 1;
- switch(control_readfile(&rcpthosts,"control/rcpthosts",0))
- {
- case -1: die();
- case 1:
- rhok = 1;
- if (!constmap_init(&maprcpthosts,rcpthosts.s,rcpthosts.len,0)) die();
- }
- switch(control_readfile(&bmf,"control/badmailfrom",0))
- {
- case -1: die();
- case 1:
- bmfok = 1;
- if (!constmap_init(&mapbmf,bmf.s,bmf.len,0)) die();
- }
+ datetime_sec when;
+ when = now();
+ out("250 ok ");
+ accept_buf[fmt_ulong(accept_buf,(unsigned long) when)] = 0;
+ out(accept_buf);
+ out(" qp ");
+ accept_buf[fmt_ulong(accept_buf,qp)] = 0;
+ out(accept_buf);
+ out("\r\n");
+}
+
+void smtp_data() {
+ int hops;
+ unsigned long qp;
+ char *qqx;
+
+ if (!seenmail) { err_wantmail(); return; }
+ if (!rcptto.len) { err_wantrcpt(); return; }
+ seenmail = 0;
+ if (databytes) bytestooverflow = databytes + 1;
+ if (qmail_open(&qqt) == -1) { err_qqt(); return; }
+ qp = qmail_qp(&qqt);
+ out("354 go ahead\r\n");
+
+ received(&qqt,"SMTP",local,remoteip,remotehost,remoteinfo,fakehelo);
+ blast(&hops);
+ hops = (hops >= MAXHOPS);
+ if (hops) qmail_fail(&qqt);
+ qmail_from(&qqt,mailfrom.s);
+ qmail_put(&qqt,rcptto.s,rcptto.len);
+
+ qqx = qmail_close(&qqt);
+ if (!*qqx) { acceptmessage(qp); return; }
+ if (hops) { out("554 too many hops, this message is looping (#5.4.6)\r\n"); return; }
+ if (databytes) if (!bytestooverflow) { out("552 sorry, that message size exceeds my databytes limit (#5.3.4)\r\n"); return; }
+ if (*qqx == 'D') out("554 "); else out("451 ");
+ out(qqx + 1);
+ out("\r\n");
}
+struct commands smtpcommands[] = {
+ { "rcpt", smtp_rcpt, 0 }
+, { "mail", smtp_mail, 0 }
+, { "data", smtp_data, flush }
+, { "quit", smtp_quit, flush }
+, { "helo", smtp_helo, flush }
+, { "ehlo", smtp_ehlo, flush }
+, { "rset", smtp_rset, 0 }
+, { "help", smtp_help, flush }
+, { "noop", err_noop, flush }
+, { "vrfy", err_vrfy, flush }
+, { 0, err_unimpl, flush }
+} ;
+
void main()
{
- static stralloc cmd = {0};
- int match;
-
- sig_alarmcatch(sigalrm);
- sig_pipeignore();
-
- if (chdir(auto_qmail) == -1) die();
- getcontrols();
- getenvs();
-
- if (ipme_init() != 1) die();
-
- smtp_greet("220 ");
- out(" ESMTP\r\n");
-
- for (;;)
- {
- /* XXX: recipient can contain quoted lf. aargh. */
- if (getln(&ssin,&cmd,&match,'\n') == -1) die();
- if (!match) die();
- if (cmd.len == 0) die();
- if (cmd.s[--cmd.len] != '\n') die();
- if ((cmd.len > 0) && (cmd.s[cmd.len - 1] == '\r')) --cmd.len;
- cmd.s[cmd.len++] = 0;
- doit(cmd.s);
- }
+ sig_pipeignore();
+ if (chdir(auto_qmail) == -1) die_control();
+ setup();
+ if (ipme_init() != 1) die_ipme();
+ smtp_greet("220 ");
+ out(" ESMTP\r\n");
+ if (commands(&ssin,&smtpcommands) == 0) die_read();
+ die_nomem();
}
~mdw / qmail / blobdiff