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/*
* Copyright (C) 2017-2025 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under LGPL-2.0+
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <arpa/inet.h>
#include "libnozzle.h"
#include "internals.h"
static int read_pipe(int fd, char **file, size_t *length)
{
char buf[4096];
int n;
int done = 0;
*file = NULL;
*length = 0;
memset(buf, 0, sizeof(buf));
while (!done) {
n = read(fd, buf, sizeof(buf));
if (n < 0) {
if (errno == EINTR)
continue;
if (*file)
free(*file);
return n;
}
if (n == 0 && (!*length))
return 0;
if (n == 0)
done = 1;
if (*file)
*file = realloc(*file, (*length) + n + done);
else
*file = malloc(n + done);
if (!*file)
return -1;
memmove((*file) + (*length), buf, n);
*length += (done + n);
}
/* Null terminator */
(*file)[(*length) - 1] = 0;
return 0;
}
int execute_bin_sh_command(const char *command, char **error_string)
{
pid_t pid;
int status, err = 0;
int fd[2];
size_t size = 0;
if ((command == NULL) || (!error_string)) {
errno = EINVAL;
return -1;
}
*error_string = NULL;
err = pipe(fd);
if (err)
goto out_clean;
pid = fork();
if (pid < 0) {
err = pid;
goto out_clean;
}
if (pid) { /* parent */
close(fd[1]);
err = read_pipe(fd[0], error_string, &size);
if (err)
goto out_clean0;
waitpid(pid, &status, 0);
if (!WIFEXITED(status)) {
err = -1;
goto out_clean0;
}
if (WIFEXITED(status) && WEXITSTATUS(status) != 0) {
err = WEXITSTATUS(status);
goto out_clean0;
}
goto out_clean0;
} else { /* child */
close(0);
close(1);
close(2);
close(fd[0]);
dup2(fd[1], 1);
dup2(fd[1], 2);
close(fd[1]);
execlp("/bin/sh", "/bin/sh", "-c", command, NULL);
exit(EXIT_FAILURE);
}
out_clean:
close(fd[1]);
out_clean0:
close(fd[0]);
return err;
}
char *generate_v4_broadcast(const char *ipaddr, const char *prefix)
{
int prefix_len;
struct in_addr mask;
struct in_addr broadcast;
struct in_addr address;
char buf[INET6_ADDRSTRLEN];
prefix_len = atoi(prefix);
if ((prefix_len > 32) || (prefix_len <= 0))
return NULL;
if (inet_pton(AF_INET, ipaddr, &address) <= 0)
return NULL;
mask.s_addr = htonl(~((1 << (32 - prefix_len)) - 1));
memset(&broadcast, 0, sizeof(broadcast));
broadcast.s_addr = (address.s_addr & mask.s_addr) | ~mask.s_addr;
return strdup(inet_ntop(AF_INET, (void *)&broadcast, buf, sizeof(buf)));
}
int find_ip(nozzle_t nozzle,
const char *ipaddr, const char *prefix,
struct nozzle_ip **ip, struct nozzle_ip **ip_prev)
{
struct nozzle_ip *local_ip, *local_ip_prev;
int found = 0;
local_ip = local_ip_prev = nozzle->ip;
while(local_ip) {
if ((!strcmp(local_ip->ipaddr, ipaddr)) && (!strcmp(local_ip->prefix, prefix))) {
found = 1;
break;
}
local_ip_prev = local_ip;
local_ip = local_ip->next;
}
if (found) {
*ip = local_ip;
*ip_prev = local_ip_prev;
}
return found;
}
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