/mandos/trunk : revision 266

99

or if none is found, creates a new one */

100

static plugin *getplugin(char *name){

101

/* Check for exiting plugin with that name */

102

for (plugin *p = plugin_list; p != NULL; p = p->next){

103

if ((p->name == name)

104

or (p->name and name and (strcmp(p->name, name) == 0))){

102

for(plugin *p = plugin_list; p != NULL; p = p->next){

103

if((p->name == name)

104

or (p->name and name and (strcmp(p->name, name) == 0))){

105

return p;

106

}

107

}

108

/* Create a new plugin */

109

plugin *new_plugin = malloc(sizeof(plugin));

110

if (new_plugin == NULL){

110

if(new_plugin == NULL){

111

return NULL;

112

}

113

char *copy_name = NULL;

124

.next = plugin_list };

125

126

new_plugin->argv = malloc(sizeof(char *) * 2);

127

if (new_plugin->argv == NULL){

127

if(new_plugin->argv == NULL){

128

free(copy_name);

129

free(new_plugin);

130

return NULL;

230

break;

231

}

232

if(pid == -1){

233

if (errno != ECHILD){

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if(errno != ECHILD){

234

perror("waitpid");

235

}

236

/* No child processes */

372

{ .name = NULL }

373

};

374

375

error_t parse_opt (int key, char *arg, __attribute__((unused))

376

struct argp_state *state) {

377

switch (key) {

375

error_t parse_opt(int key, char *arg, __attribute__((unused))

376

struct argp_state *state) {

377

switch(key) {

378

case 'g': /* --global-options */

379

if (arg != NULL){

379

if(arg != NULL){

380

char *p;

381

while((p = strsep(&arg, ",")) != NULL){

382

if(p[0] == '\0'){

398

}

399

break;

400

case 'o': /* --options-for */

401

if (arg != NULL){

401

if(arg != NULL){

402

char *p_name = strsep(&arg, ":");

403

if(p_name[0] == '\0' or arg == NULL){

404

break;

435

}

436

break;

437

case 'd': /* --disable */

438

if (arg != NULL){

438

if(arg != NULL){

439

plugin *p = getplugin(arg);

440

if(p == NULL){

441

return ARGP_ERR_UNKNOWN;

444

}

445

break;

446

case 'e': /* --enable */

447

if (arg != NULL){

447

if(arg != NULL){

448

plugin *p = getplugin(arg);

449

if(p == NULL){

450

return ARGP_ERR_UNKNOWN;

503

504

/* This option parser is the same as parse_opt() above, except it

505

ignores everything but the --config-file option. */

506

error_t parse_opt_config_file (int key, char *arg,

507

__attribute__((unused))

508

struct argp_state *state) {

509

switch (key) {

506

error_t parse_opt_config_file(int key, char *arg,

507

__attribute__((unused))

508

struct argp_state *state) {

509

switch(key) {

510

case 'g': /* --global-options */

511

case 'G': /* --global-env */

512

case 'o': /* --options-for */

541

542

/* Parse using parse_opt_config_file() in order to get the custom

543

config file location, if any. */

544

ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

545

if (ret == ARGP_ERR_UNKNOWN){

544

ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

545

if(ret == ARGP_ERR_UNKNOWN){

546

fprintf(stderr, "Unknown error while parsing arguments\n");

547

exitstatus = EXIT_FAILURE;

548

goto fallback;

552

argp.parser = parse_opt;

553

554

/* Open the configfile if available */

555

if (argfile == NULL){

555

if(argfile == NULL){

556

conffp = fopen(AFILE, "r");

557

} else {

558

conffp = fopen(argfile, "r");

613

} else {

614

/* Check for harmful errors and go to fallback. Other errors might

615

not affect opening plugins */

616

if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){

616

if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){

617

perror("fopen");

618

exitstatus = EXIT_FAILURE;

619

goto fallback;

622

/* If there was any arguments from configuration file,

623

pass them to parser as command arguments */

624

if(custom_argv != NULL){

625

ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,

626

0, NULL);

627

if (ret == ARGP_ERR_UNKNOWN){

625

ret = argp_parse(&argp, custom_argc, custom_argv, ARGP_IN_ORDER,

626

0, NULL);

627

if(ret == ARGP_ERR_UNKNOWN){

628

fprintf(stderr, "Unknown error while parsing arguments\n");

629

exitstatus = EXIT_FAILURE;

630

goto fallback;

633

634

/* Parse actual command line arguments, to let them override the

635

config file */

636

ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

637

if (ret == ARGP_ERR_UNKNOWN){

636

ret = argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);

637

if(ret == ARGP_ERR_UNKNOWN){

638

fprintf(stderr, "Unknown error while parsing arguments\n");

639

exitstatus = EXIT_FAILURE;

640

goto fallback;

656

657

/* Strip permissions down to nobody */

658

ret = setuid(uid);

659

if (ret == -1){

659

if(ret == -1){

660

perror("setuid");

661

}

662

setgid(gid);

663

if (ret == -1){

663

if(ret == -1){

664

perror("setgid");

665

}

666

667

if (plugindir == NULL){

667

if(plugindir == NULL){

668

dir = opendir(PDIR);

669

} else {

670

dir = opendir(plugindir);

697

698

/* All directory entries have been processed */

699

if(dirst == NULL){

700

if (errno == EBADF){

700

if(errno == EBADF){

701

perror("readdir");

702

exitstatus = EXIT_FAILURE;

703

goto fallback;

763

}

764

765

ret = stat(filename, &st);

766

if (ret == -1){

766

if(ret == -1){

767

perror("stat");

768

free(filename);

769

continue;

770

}

771

772

/* Ignore non-executable files */

773

if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){

773

if(not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){

774

if(debug){

775

fprintf(stderr, "Ignoring plugin dir entry \"%s\""

776

" with bad type or mode\n", filename);

823

824

int pipefd[2];

825

ret = pipe(pipefd);

826

if (ret == -1){

826

if(ret == -1){

827

perror("pipe");

828

exitstatus = EXIT_FAILURE;

829

goto fallback;

842

goto fallback;

843

}

844

/* Block SIGCHLD until process is safely in process list */

845

ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);

845

ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);

846

if(ret < 0){

847

perror("sigprocmask");

848

exitstatus = EXIT_FAILURE;

896

close(pipefd[1]); /* Close unused write end of pipe */

897

free(filename);

898

plugin *new_plugin = getplugin(dirst->d_name);

899

if (new_plugin == NULL){

899

if(new_plugin == NULL){

900

perror("getplugin");

901

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

901

ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

902

if(ret < 0){

903

perror("sigprocmask");

904

}

911

912

/* Unblock SIGCHLD so signal handler can be run if this process

913

has already completed */

914

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

914

ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);

915

if(ret < 0){

916

perror("sigprocmask");

917

exitstatus = EXIT_FAILURE;

920

921

FD_SET(new_plugin->fd, &rfds_all);

922

923

if (maxfd < new_plugin->fd){

923

if(maxfd < new_plugin->fd){

924

maxfd = new_plugin->fd;

925

}

926

}

943

while(plugin_list){

944

fd_set rfds = rfds_all;

945

int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);

946

if (select_ret == -1){

946

if(select_ret == -1){

947

perror("select");

948

exitstatus = EXIT_FAILURE;

949

goto fallback;

989

proc = next_plugin;

990

991

/* We are done modifying process list, so unblock signal */

992

ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,

993

NULL);

992

ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,

993

NULL);

994

if(ret < 0){

995

perror("sigprocmask");

996

exitstatus = EXIT_FAILURE;

1025

if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){

1026

proc->buffer = realloc(proc->buffer, proc->buffer_size

1027

+ (size_t) BUFFER_SIZE);

1028

if (proc->buffer == NULL){

1028

if(proc->buffer == NULL){

1029

perror("malloc");

1030

exitstatus = EXIT_FAILURE;

1031

goto fallback;