From 89b7b67a13ebb7965cc7f13ad0595e2194a2d34c Mon Sep 17 00:00:00 2001
From: Jannis Hoffmann <jannis@fehcom.de>
Date: Wed, 3 Jul 2024 15:48:04 +0200
Subject: add sqmail-4.2.29a

---
 src/qmail-qmqpc.c | 178 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 src/qmail-qmqpc.c

(limited to 'src/qmail-qmqpc.c')

diff --git a/src/qmail-qmqpc.c b/src/qmail-qmqpc.c
new file mode 100644
index 0000000..c92e072
--- /dev/null
+++ b/src/qmail-qmqpc.c
@@ -0,0 +1,178 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include "buffer.h"
+#include "getln.h"
+#include "exit.h"
+#include "stralloc.h"
+#include "readclose.h"
+#include "timeoutconn.h"
+#include "logmsg.h"
+#include "str.h"
+#include "sig.h"
+#include "ip.h"
+#include "timeout.h"
+#include "auto_qmail.h"
+#include "control.h"
+#include "fmt.h"
+#include "uint_t.h"
+#include "socket_if.h"
+
+#define PORT_QMQP 628
+
+void die_success() { _exit(0); }
+void die_perm() { _exit(31); }
+void nomem() { _exit(51); }
+void die_read() { if (errno == ENOMEM) nomem(); _exit(54); }
+void die_control() { _exit(55); }
+void die_socket() { _exit(56); }
+void die_home() { _exit(61); }
+void die_temp() { _exit(71); }
+void die_conn() { _exit(74); }
+void die_format() { _exit(91); }
+
+int lasterror = 55;
+int qmqpfd;
+
+ssize_t saferead(int fd,char *buf,int len)
+{
+  int r;
+  r = timeoutread(60,qmqpfd,buf,len);
+  if (r <= 0) die_conn();
+  return r;
+}
+
+ssize_t safewrite(int fd,char *buf,int len)
+{
+  int r;
+  r = timeoutwrite(60,qmqpfd,buf,len);
+  if (r <= 0) die_conn();
+  return r;
+}
+
+char buf[1024];
+buffer bo = BUFFER_INIT(safewrite,-1,buf,sizeof(buf));
+buffer bi = BUFFER_INIT(saferead,-1,buf,sizeof(buf));
+buffer be = BUFFER_INIT(read,1,buf,sizeof(buf));  // envelope
+/* WARNING: can use only one of these at a time! */
+
+stralloc beforemessage = {0};
+stralloc message = {0};
+stralloc aftermessage = {0};
+
+char strnum[FMT_ULONG];
+stralloc line = {0};
+
+void getmess()
+{
+  int match;
+
+  if (readclose_append(0,&message,1024) == -1) die_read();
+
+  strnum[fmt_ulong(strnum,(unsigned long) message.len)] = 0;
+  if (!stralloc_copys(&beforemessage,strnum)) nomem();
+  if (!stralloc_cats(&beforemessage,":")) nomem();
+  if (!stralloc_copys(&aftermessage,",")) nomem();
+
+  if (getln(&be,&line,&match,'\0') == -1) die_read();
+  if (!match) die_format();
+  if (line.len < 2) die_format();
+  if (line.s[0] != 'F') die_format();
+
+  strnum[fmt_ulong(strnum,(unsigned long) line.len - 2)] = 0;
+  if (!stralloc_cats(&aftermessage,strnum)) nomem();
+  if (!stralloc_cats(&aftermessage,":")) nomem();
+  if (!stralloc_catb(&aftermessage,line.s + 1,line.len - 2)) nomem();
+  if (!stralloc_cats(&aftermessage,",")) nomem();
+
+  for (;;) {
+    if (getln(&be,&line,&match,'\0') == -1) die_read();
+    if (!match) die_format();
+    if (line.len < 2) break;
+    if (line.s[0] != 'T') die_format();
+
+    strnum[fmt_ulong(strnum,(unsigned long) line.len - 2)] = 0;
+    if (!stralloc_cats(&aftermessage,strnum)) nomem();
+    if (!stralloc_cats(&aftermessage,":")) nomem();
+    if (!stralloc_catb(&aftermessage,line.s + 1,line.len - 2)) nomem();
+    if (!stralloc_cats(&aftermessage,",")) nomem();
+  }
+}
+
+void doit(char *server)
+{
+  struct ip4_address ip4s;
+  struct ip6_address ip6s;
+  char *netif = 0;
+  uint32 ifidx = 0;
+  char ch;
+  int i, j, r;
+
+  i = str_chr(server,':');
+  if (server[i] == ':') {
+    j = str_chr(server,'%');                                   /* IF index */
+    if (server[j] == '%') {
+      server[j] = 0;
+      netif = &server[j + 1];
+      ifidx = socket_getifidx(netif);
+    } 
+    if (!ip6_scan(server,(char *)&ip6s.d)) return;
+    qmqpfd = socket(AF_INET6,SOCK_STREAM,0);
+    if (qmqpfd == -1) die_socket();
+    r = timeoutconn6(qmqpfd,(char *)&ip6s.d,PORT_QMQP,10,ifidx);
+  } else {
+    if (!ip4_scan(server,(char *)&ip4s.d)) return;
+    qmqpfd = socket(AF_INET,SOCK_STREAM,0);
+    if (qmqpfd == -1) die_socket();
+    r = timeoutconn4(qmqpfd,(char *)&ip4s.d,PORT_QMQP,10);
+  }
+  if (r != 0) {
+    lasterror = 73;
+    if (errno == ETIMEDOUT) lasterror = 72;
+    close(qmqpfd);
+    return;
+  }
+
+  strnum[fmt_ulong(strnum,(unsigned long) (beforemessage.len + message.len + aftermessage.len))] = 0;
+  buffer_puts(&bo,strnum);
+  buffer_puts(&bo,":");
+  buffer_put(&bo,beforemessage.s,beforemessage.len);
+  buffer_put(&bo,message.s,message.len);
+  buffer_put(&bo,aftermessage.s,aftermessage.len);
+  buffer_puts(&bo,",");
+  buffer_flush(&bo);
+
+  for (;;) {
+    buffer_get(&bi,&ch,1);
+    if (ch == 'K') die_success();
+    if (ch == 'Z') die_temp();
+    if (ch == 'D') die_perm();
+  }
+}
+
+stralloc servers = {0};
+
+int main()
+{
+  int i;
+  int j;
+
+  sig_pipeignore();
+
+  if (chdir(auto_qmail) == -1) die_home();
+  if (control_init() == -1) die_control();
+  if (control_readfile(&servers,"control/qmqpservers",0) != 1) die_control();
+
+  getmess();
+
+  i = 0;
+  for (j = 0; j < servers.len; ++j)
+    if (!servers.s[j]) {
+      doit(servers.s + i);
+      i = j + 1;
+    }
+
+  _exit(lasterror);
+}
-- 
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