HP 800 HP DLPI Programmer's Guide - Page 186

cmd_info.dl_request = DL_HP_DRV_MTU|DL_HP_SERIALIZE, strioctl.ic_cmd = DL_HP_SET_DRV_PARAM_IOCTL

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Page 186 highlights

Sample Programs ioctl Example void set_mtu_size(fd, mtu) int fd; int mtu; { dl_hp_set_drv_param_ioctl_t cmd_info; struct strioctl strioctl; /* Zero out the cmd_info before filling it up with the IOCTL information. */ memset(&cmd_info, 0, sizeof(dl_hp_set_drv_param_ioctl_t)); /* Set the strioctl element to appropriate values. */ strioctl.ic_cmd = DL_HP_SET_DRV_PARAM_IOCTL; strioctl.ic_len = sizeof(cmd_info); strioctl.ic_timout = 0; strioctl.ic_dp = (char *)&cmd_info; cmd_info.dl_request = DL_HP_DRV_MTU|DL_HP_SERIALIZE; cmd_info.dl_mtu = mtu; /* Issue the ioctl request. */ if (ioctl(fd, I_STR, &strioctl) < 0) { /* Unable to get mtu size */ printf("Unable to get MTU size: errno = %d\n", errno); exit(-1); } printf("Successfully changed MTU to:%u\n", cmd_info.dl_mtu); } int main(argc, argv) int argc; char **argv; { int fd, flags, ppa = 0; int operation = 0, set_mtu_value = 0; int recv_primitive = 0; 186 Appendix A

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Sample Programs
ioctl Example
Appendix A
186
void
set_mtu_size(fd, mtu)
int fd;
int mtu;
{
dl_hp_set_drv_param_ioctl_t cmd_info;
struct strioctl strioctl;
/*
Zero out the cmd_info before filling it up with the IOCTL
information.
*/
memset(&cmd_info, 0, sizeof(dl_hp_set_drv_param_ioctl_t));
/*
Set the strioctl element to appropriate values.
*/
strioctl.ic_cmd = DL_HP_SET_DRV_PARAM_IOCTL;
strioctl.ic_len = sizeof(cmd_info);
strioctl.ic_timout = 0;
strioctl.ic_dp = (char *)&cmd_info;
cmd_info.dl_request = DL_HP_DRV_MTU|DL_HP_SERIALIZE;
cmd_info.dl_mtu = mtu;
/*
Issue the ioctl request.
*/
if (ioctl(fd, I_STR, &strioctl) < 0) {
/* Unable to get mtu size */
printf("Unable to get MTU size: errno = %d\n", errno);
exit(-1);
}
printf("Successfully changed MTU to:%u\n", cmd_info.dl_mtu);
}
int
main(argc, argv)
int argc;
char **argv;
{
int
fd, flags, ppa = 0;
int
operation = 0, set_mtu_value = 0;
int recv_primitive = 0;