RTEMS Network Supplement
The function provided in this section is functionally equivalent to
the command route add default gw yyy.yyy.yyy.yyy:
void mon_ifconfig(int argc, char *argv[], unsigned32 command_arg,
bool verbose)
{
struct sockaddr_in ipaddr;
struct sockaddr_in dstaddr;
struct sockaddr_in netmask;
struct sockaddr_in broadcast;
char *iface;
int f_ip = 0;
int f_ptp = 0;
int f_netmask = 0;
int f_up = 0;
int f_down = 0;
int f_bcast = 0;
int cur_idx;
int rc;
int flags;
bzero((void*) &ipaddr, sizeof(ipaddr));
bzero((void*) &dstaddr, sizeof(dstaddr));
bzero((void*) &netmask, sizeof(netmask));
bzero((void*) &broadcast, sizeof(broadcast));
ipaddr.sin_len = sizeof(ipaddr);
ipaddr.sin_family = AF_INET;
dstaddr.sin_len = sizeof(dstaddr);
dstaddr.sin_family = AF_INET;
netmask.sin_len = sizeof(netmask);
netmask.sin_family = AF_INET;
broadcast.sin_len = sizeof(broadcast);
broadcast.sin_family = AF_INET;
cur_idx = 0;
if (argc <= 1) {
/* display all interfaces */
iface = NULL;
cur_idx += 1;
} else {
iface = argv[1];
if (isdigit(*argv[2])) {
if (inet_pton(AF_INET, argv[2], &ipaddr.sin_addr) < 0) {
printf("bad ip address: %s\n", argv[2]);
return;
}
f_ip = 1;
cur_idx += 3;
} else {
cur_idx += 2;
}
}
if ((f_down !=0) && (f_ip != 0)) {
f_up = 1;
}
while(argc > cur_idx) {
if (strcmp(argv[cur_idx], "up") == 0) {
f_up = 1;
if (f_down != 0) {
printf("Can't make interface up and down\n");
}
} else if(strcmp(argv[cur_idx], "down") == 0) {
f_down = 1;
if (f_up != 0) {
printf("Can't make interface up and down\n");
}
} else if(strcmp(argv[cur_idx], "netmask") == 0) {
if ((cur_idx + 1) >= argc) {
printf("No netmask address\n");
return;
}
if (inet_pton(AF_INET, argv[cur_idx+1], &netmask.sin_addr) < 0) {
printf("bad netmask: %s\n", argv[cur_idx]);
return;
}
f_netmask = 1;
cur_idx += 1;
} else if(strcmp(argv[cur_idx], "broadcast") == 0) {
if ((cur_idx + 1) >= argc) {
printf("No broadcast address\n");
return;
}
if (inet_pton(AF_INET, argv[cur_idx+1], &broadcast.sin_addr) < 0) {
printf("bad broadcast: %s\n", argv[cur_idx]);
return;
}
f_bcast = 1;
cur_idx += 1;
} else if(strcmp(argv[cur_idx], "pointopoint") == 0) {
if ((cur_idx + 1) >= argc) {
printf("No pointopoint address\n");
return;
}
if (inet_pton(AF_INET, argv[cur_idx+1], &dstaddr.sin_addr) < 0) {
printf("bad pointopoint: %s\n", argv[cur_idx]);
return;
}
f_ptp = 1;
cur_idx += 1;
} else {
printf("Bad parameter: %s\n", argv[cur_idx]);
return;
}
cur_idx += 1;
}
printf("ifconfig ");
if (iface != NULL) {
printf("%s ", iface);
if (f_ip != 0) {
char str[256];
inet_ntop(AF_INET, &ipaddr.sin_addr, str, 256);
printf("%s ", str);
}
if (f_netmask != 0) {
char str[256];
inet_ntop(AF_INET, &netmask.sin_addr, str, 256);
printf("netmask %s ", str);
}
if (f_bcast != 0) {
char str[256];
inet_ntop(AF_INET, &broadcast.sin_addr, str, 256);
printf("broadcast %s ", str);
}
if (f_ptp != 0) {
char str[256];
inet_ntop(AF_INET, &dstaddr.sin_addr, str, 256);
printf("pointopoint %s ", str);
}
if (f_up != 0) {
printf("up\n");
} else if (f_down != 0) {
printf("down\n");
} else {
printf("\n");
}
}
if ((iface == NULL) || ((f_ip == 0) && (f_down == 0) && (f_up == 0))) {
rtems_bsdnet_show_if_stats();
return;
}
flags = 0;
if (f_netmask) {
rc = rtems_bsdnet_ifconfig(iface, SIOCSIFNETMASK, &netmask);
if (rc < 0) {
printf("Could not set netmask: %s\n", strerror(errno));
return;
}
}
if (f_bcast) {
rc = rtems_bsdnet_ifconfig(iface, SIOCSIFBRDADDR, &broadcast);
if (rc < 0) {
printf("Could not set broadcast: %s\n", strerror(errno));
return;
}
}
if (f_ptp) {
rc = rtems_bsdnet_ifconfig(iface, SIOCSIFDSTADDR, &dstaddr);
if (rc < 0) {
printf("Could not set destination address: %s\n", strerror(errno));
return;
}
flags |= IFF_POINTOPOINT;
}
/* This must come _after_ setting the netmask, broadcast addresses */
if (f_ip) {
rc = rtems_bsdnet_ifconfig(iface, SIOCSIFADDR, &ipaddr);
if (rc < 0) {
printf("Could not set IP address: %s\n", strerror(errno));
return;
}
}
if (f_up != 0) {
flags |= IFF_UP;
}
if (f_down != 0) {
printf("Warning: taking interfaces down is not supported\n");
}
rc = rtems_bsdnet_ifconfig(iface, SIOCSIFFLAGS, &flags);
if (rc < 0) {
printf("Could not set interface flags: %s\n", strerror(errno));
return;
}
}
void mon_route(int argc, char *argv[], unsigned32 command_arg,
bool verbose)
{
int cmd;
struct sockaddr_in dst;
struct sockaddr_in gw;
struct sockaddr_in netmask;
int f_host;
int f_gw = 0;
int cur_idx;
int flags;
int rc;
memset(&dst, 0, sizeof(dst));
memset(&gw, 0, sizeof(gw));
memset(&netmask, 0, sizeof(netmask));
dst.sin_len = sizeof(dst);
dst.sin_family = AF_INET;
dst.sin_addr.s_addr = inet_addr("0.0.0.0");
gw.sin_len = sizeof(gw);
gw.sin_family = AF_INET;
gw.sin_addr.s_addr = inet_addr("0.0.0.0");
netmask.sin_len = sizeof(netmask);
netmask.sin_family = AF_INET;
netmask.sin_addr.s_addr = inet_addr("255.255.255.0");
if (argc < 2) {
rtems_bsdnet_show_inet_routes();
return;
}
if (strcmp(argv[1], "add") == 0) {
cmd = RTM_ADD;
} else if (strcmp(argv[1], "del") == 0) {
cmd = RTM_DELETE;
} else {
printf("invalid command: %s\n", argv[1]);
printf("\tit should be 'add' or 'del'\n");
return;
}
if (argc < 3) {
printf("not enough arguments\n");
return;
}
if (strcmp(argv[2], "-host") == 0) {
f_host = 1;
} else if (strcmp(argv[2], "-net") == 0) {
f_host = 0;
} else {
printf("Invalid type: %s\n", argv[1]);
printf("\tit should be '-host' or '-net'\n");
return;
}
if (argc < 4) {
printf("not enough arguments\n");
return;
}
inet_pton(AF_INET, argv[3], &dst.sin_addr);
cur_idx = 4;
while(cur_idx < argc) {
if (strcmp(argv[cur_idx], "gw") == 0) {
if ((cur_idx +1) >= argc) {
printf("no gateway address\n");
return;
}
f_gw = 1;
inet_pton(AF_INET, argv[cur_idx + 1], &gw.sin_addr);
cur_idx += 1;
} else if(strcmp(argv[cur_idx], "netmask") == 0) {
if ((cur_idx +1) >= argc) {
printf("no netmask address\n");
return;
}
f_gw = 1;
inet_pton(AF_INET, argv[cur_idx + 1], &netmask.sin_addr);
cur_idx += 1;
} else {
printf("Unknown argument\n");
return;
}
cur_idx += 1;
}
flags = RTF_STATIC;
if (f_gw != 0) {
flags |= RTF_GATEWAY;
}
if (f_host != 0) {
flags |= RTF_HOST;
}
rc = rtems_bsdnet_rtrequest(cmd, &dst, &gw, &netmask, flags, NULL);
if (rc < 0) {
printf("Error adding route\n");
}
}
Thanks to Jay Monkman for this example code.
RTEMS Network Supplement
Copyright © 1988-2008 OAR Corporation