remailer.c

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#include "config.h"
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "remailer.h"
#include "globals.h" // IWYU pragma: keep
 
void remailer_free(struct Remailer **ptr)
{
  if (!ptr || !*ptr)
    return;
 
  struct Remailer *r = *ptr;
  FREE(&r->shortname);
  FREE(&r->addr);
  FREE(&r->ver);
 
  FREE(ptr);
}
 
struct Remailer *remailer_new(void)
{
  return mutt_mem_calloc(1, sizeof(struct Remailer));
}
 
static MixCapFlags mix_get_caps(const char *capstr)
{
  MixCapFlags caps = MIX_CAP_NO_FLAGS;
 
  while (*capstr)
  {
    switch (*capstr)
    {
      case 'C':
        caps |= MIX_CAP_COMPRESS;
        break;
 
      case 'M':
        caps |= MIX_CAP_MIDDLEMAN;
        break;
 
      case 'N':
      {
        switch (*++capstr)
        {
          case 'm':
            caps |= MIX_CAP_NEWSMAIL;
            break;
 
          case 'p':
            caps |= MIX_CAP_NEWSPOST;
            break;
        }
      }
    }
 
    if (*capstr)
      capstr++;
  }
 
  return caps;
}
 
struct RemailerArray remailer_get_hosts(void)
{
  struct RemailerArray ra = ARRAY_HEAD_INITIALIZER;
  FILE *fp = NULL;
  char line[8192] = { 0 };
  char *t = NULL;
  struct Remailer *p = NULL;
 
  const char *const c_mixmaster = cs_subset_string(NeoMutt->sub, "mixmaster");
  if (!c_mixmaster)
    return ra;
 
  int fd_null = open("/dev/null", O_RDWR);
  if (fd_null == -1)
    return ra;
 
  struct Buffer *cmd = buf_pool_get();
  buf_printf(cmd, "%s -T", c_mixmaster);
 
  pid_t mm_pid = filter_create_fd(buf_string(cmd), NULL, &fp, NULL, fd_null, -1,
                                  fd_null, EnvList);
  window_invalidate_all();
  if (mm_pid == -1)
  {
    buf_pool_release(&cmd);
    close(fd_null);
    return ra;
  }
 
  buf_pool_release(&cmd);
 
  /* first, generate the "random" remailer */
 
  p = remailer_new();
  p->shortname = mutt_str_dup(_("<random>"));
  p->num = 0;
  ARRAY_ADD(&ra, p);
 
  while (fgets(line, sizeof(line), fp))
  {
    p = remailer_new();
 
    t = strtok(line, " \t\n");
    if (!t)
      goto problem;
 
    p->shortname = mutt_str_dup(t);
 
    t = strtok(NULL, " \t\n");
    if (!t)
      goto problem;
 
    p->addr = mutt_str_dup(t);
 
    t = strtok(NULL, " \t\n");
    if (!t)
      goto problem;
 
    t = strtok(NULL, " \t\n");
    if (!t)
      goto problem;
 
    p->ver = mutt_str_dup(t);
 
    t = strtok(NULL, " \t\n");
    if (!t)
      goto problem;
 
    p->caps = mix_get_caps(t);
 
    p->num = ARRAY_SIZE(&ra);
    ARRAY_ADD(&ra, p);
    continue;
 
  problem:
    remailer_free(&p);
  }
 
  filter_wait(mm_pid);
 
  close(fd_null);
 
  return ra;
}
 
void remailer_clear_hosts(struct RemailerArray *ra)
{
  struct Remailer **r = NULL;
  ARRAY_FOREACH(r, ra)
  {
    remailer_free(r);
  }
 
  ARRAY_FREE(ra);
}