tests/include/sys/t_socket.c

   1 /*      $NetBSD: t_socket.c,v 1.4 2015/02/27 08:30:30 martin Exp $      */
   2
   3 #include <sys/types.h>
   4 #include <sys/mount.h>
   5 #include <sys/socket.h>
   6 #include <sys/un.h>
   7
   8 #include <rump/rump.h>
   9 #include <rump/rump_syscalls.h>
  10
  11 #include <atf-c.h>
  12 #include <fcntl.h>
  13 #include <err.h>
  14 #include <errno.h>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <unistd.h>
  19 #include <util.h>
  20
  21 #include "../../h_macros.h"
  22
  23 ATF_TC(cmsg_sendfd_bounds);
  24 ATF_TC_HEAD(cmsg_sendfd_bounds, tc)
  25 {
  26         atf_tc_set_md_var(tc, "descr", "Checks that attempting to pass an "
  27             "invalid fd returns an error");
  28 }
  29
  30 ATF_TC_BODY(cmsg_sendfd_bounds, tc)
  31 {
  32         struct cmsghdr *cmp;
  33         struct msghdr msg;
  34         struct iovec iov;
  35         int s[2];
  36         int fd;
  37
  38         rump_init();
  39
  40         if (rump_sys_socketpair(AF_LOCAL, SOCK_STREAM, 0, s) == -1)
  41                 atf_tc_fail("rump_sys_socket");
  42
  43         cmp = malloc(CMSG_SPACE(sizeof(int)));
  44
  45         iov.iov_base = &fd;
  46         iov.iov_len = sizeof(int);
  47
  48         cmp->cmsg_level = SOL_SOCKET;
  49         cmp->cmsg_type = SCM_RIGHTS;
  50         cmp->cmsg_len = CMSG_LEN(sizeof(int));
  51
  52         msg.msg_iov = &iov;
  53         msg.msg_iovlen = 1;
  54         msg.msg_name = NULL;
  55         msg.msg_namelen = 0;
  56         msg.msg_control = cmp;
  57         msg.msg_controllen = CMSG_SPACE(sizeof(int));
  58
  59         /*
  60          * ERROR HERE: trying to pass invalid fd
  61          * (This value was previously directly used to index the fd
  62          *  array and therefore we are passing a hyperspace index)
  63          */
  64         *(int *)CMSG_DATA(cmp) = 0x12345678;
  65
  66         rump_sys_sendmsg(s[0], &msg, 0);
  67         if (errno != EBADF)
  68                 atf_tc_fail("descriptor passing failed: expected EBADF (9), "
  69                     "got %d\n(%s)", errno, strerror(errno));
  70 }
  71
  72
  73 ATF_TC(cmsg_sendfd);
  74 ATF_TC_HEAD(cmsg_sendfd, tc)
  75 {
  76         atf_tc_set_md_var(tc, "descr", "Checks that fd passing works");
  77         atf_tc_set_md_var(tc, "timeout", "10");
  78 }
  79
  80 ATF_TC_BODY(cmsg_sendfd, tc)
  81 {
  82         char buf[128];
  83         struct cmsghdr *cmp;
  84         struct msghdr msg;
  85         struct sockaddr_un sun;
  86         struct lwp *l1;
  87         struct iovec iov;
  88         socklen_t sl;
  89         int s1, s2, sgot;
  90         int rfd, fd[2], storage;
  91
  92         rump_init();
  93
  94         RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
  95         l1 = rump_pub_lwproc_curlwp();
  96
  97         /* create unix socket and bind it to a path */
  98         memset(&sun, 0, sizeof(sun));
  99         sun.sun_family = AF_LOCAL;
 100 #define SOCKPATH "/com"
 101         strncpy(sun.sun_path, SOCKPATH, sizeof(SOCKPATH));
 102         s1 = rump_sys_socket(AF_LOCAL, SOCK_STREAM, 0);
 103         if (s1 == -1)
 104                 atf_tc_fail_errno("socket 1");
 105         if (rump_sys_bind(s1, (struct sockaddr *)&sun, SUN_LEN(&sun)) == -1)
 106                 atf_tc_fail_errno("socket 1 bind");
 107         if (rump_sys_listen(s1, 1) == -1)
 108                 atf_tc_fail_errno("socket 1 listen");
 109
 110         /* create second process for test */
 111         RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
 112         (void)rump_pub_lwproc_curlwp();
 113
 114         /* connect to unix domain socket */
 115         memset(&sun, 0, sizeof(sun));
 116         sun.sun_family = AF_LOCAL;
 117         strncpy(sun.sun_path, SOCKPATH, sizeof(SOCKPATH));
 118         s2 = rump_sys_socket(AF_LOCAL, SOCK_STREAM, 0);
 119         if (s2 == -1)
 120                 atf_tc_fail_errno("socket 2");
 121         if (rump_sys_connect(s2, (struct sockaddr *)&sun, SUN_LEN(&sun)) == -1)
 122                 atf_tc_fail_errno("socket 2 connect");
 123
 124         /* open a pipe and write stuff to it */
 125         if (rump_sys_pipe(fd) == -1)
 126                 atf_tc_fail_errno("can't open pipe");
 127 #define MAGICSTRING "duam xnaht"
 128         if (rump_sys_write(fd[1], MAGICSTRING, sizeof(MAGICSTRING)) !=
 129             sizeof(MAGICSTRING))
 130                 atf_tc_fail_errno("pipe write"); /* XXX: errno */
 131
 132         cmp = malloc(CMSG_SPACE(sizeof(int)));
 133
 134         iov.iov_base = &storage;
 135         iov.iov_len = sizeof(int);
 136
 137         cmp->cmsg_level = SOL_SOCKET;
 138         cmp->cmsg_type = SCM_RIGHTS;
 139         cmp->cmsg_len = CMSG_LEN(sizeof(int));
 140
 141         msg.msg_iov = &iov;
 142         msg.msg_iovlen = 1;
 143         msg.msg_name = NULL;
 144         msg.msg_namelen = 0;
 145         msg.msg_control = cmp;
 146         msg.msg_controllen = CMSG_SPACE(sizeof(int));
 147         *(int *)CMSG_DATA(cmp) = fd[0];
 148
 149         /* pass the fd */
 150         if (rump_sys_sendmsg(s2, &msg, 0) == -1)
 151                 atf_tc_fail_errno("sendmsg failed");
 152
 153         /*
 154          * We will read to the same cmsg space.  Overwrite the space
 155          * with an invalid fd to make sure we get an explicit error
 156          * if we don't manage to read the fd.
 157          */
 158         *(int *)CMSG_DATA(cmp) = -1;
 159
 160         /* switch back to original proc */
 161         rump_pub_lwproc_switch(l1);
 162
 163         /* accept connection and read fd */
 164         sl = sizeof(sun);
 165         sgot = rump_sys_accept(s1, (struct sockaddr *)&sun, &sl);
 166         if (sgot == -1)
 167                 atf_tc_fail_errno("accept");
 168         if (rump_sys_recvmsg(sgot, &msg, 0) == -1)
 169                 atf_tc_fail_errno("recvmsg failed");
 170         rfd = *(int *)CMSG_DATA(cmp);
 171
 172         /* read from the fd */
 173         memset(buf, 0, sizeof(buf));
 174         if (rump_sys_read(rfd, buf, sizeof(buf)) == -1)
 175                 atf_tc_fail_errno("read rfd");
 176
 177         /* check that we got the right stuff */
 178         if (strcmp(buf, MAGICSTRING) != 0)
 179                 atf_tc_fail("expected \"%s\", got \"%s\"", MAGICSTRING, buf);
 180 }
 181
 182 ATF_TC(sock_cloexec);
 183 ATF_TC_HEAD(sock_cloexec, tc)
 184 {
 185         atf_tc_set_md_var(tc, "descr", "SOCK_CLOEXEC kernel invariant failure");
 186 }
 187
 188 ATF_TC_BODY(sock_cloexec, tc)
 189 {
 190
 191         rump_init();
 192         rump_pub_lwproc_rfork(RUMP_RFFDG);
 193         if (rump_sys_socket(-1, SOCK_CLOEXEC, 0) != -1)
 194                 atf_tc_fail("invalid socket parameters unexpectedly worked");
 195         rump_pub_lwproc_releaselwp();
 196 }
 197
 198 ATF_TP_ADD_TCS(tp)
 199 {
 200         ATF_TP_ADD_TC(tp, cmsg_sendfd);
 201         ATF_TP_ADD_TC(tp, cmsg_sendfd_bounds);
 202         ATF_TP_ADD_TC(tp, sock_cloexec);
 203
 204         return atf_no_error();
 205 }