diff options
Diffstat (limited to 'package/toolbox/src/src/ifconfig.c')
| -rw-r--r-- | package/toolbox/src/src/ifconfig.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/package/toolbox/src/src/ifconfig.c b/package/toolbox/src/src/ifconfig.c new file mode 100644 index 000000000..510d3b555 --- /dev/null +++ b/package/toolbox/src/src/ifconfig.c @@ -0,0 +1,164 @@ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <errno.h> +#include <string.h> +#include <ctype.h> + +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <linux/if.h> +#include <linux/sockios.h> +#include <arpa/inet.h> + +static void die(const char *s) +{ + fprintf(stderr,"error: %s (%s)\n", s, strerror(errno)); + exit(-1); +} + +static void setflags(int s, struct ifreq *ifr, int set, int clr) +{ + if(ioctl(s, SIOCGIFFLAGS, ifr) < 0) die("SIOCGIFFLAGS"); + ifr->ifr_flags = (ifr->ifr_flags & (~clr)) | set; + if(ioctl(s, SIOCSIFFLAGS, ifr) < 0) die("SIOCSIFFLAGS"); +} + +static inline void init_sockaddr_in(struct sockaddr_in *sin, const char *addr) +{ + sin->sin_family = AF_INET; + sin->sin_port = 0; + sin->sin_addr.s_addr = inet_addr(addr); +} + +static void setmtu(int s, struct ifreq *ifr, const char *mtu) +{ + int m = atoi(mtu); + ifr->ifr_mtu = m; + if(ioctl(s, SIOCSIFMTU, ifr) < 0) die("SIOCSIFMTU"); +} +static void setdstaddr(int s, struct ifreq *ifr, const char *addr) +{ + init_sockaddr_in((struct sockaddr_in *) &ifr->ifr_dstaddr, addr); + if(ioctl(s, SIOCSIFDSTADDR, ifr) < 0) die("SIOCSIFDSTADDR"); +} + +static void setnetmask(int s, struct ifreq *ifr, const char *addr) +{ + init_sockaddr_in((struct sockaddr_in *) &ifr->ifr_netmask, addr); + if(ioctl(s, SIOCSIFNETMASK, ifr) < 0) die("SIOCSIFNETMASK"); +} + +static void setaddr(int s, struct ifreq *ifr, const char *addr) +{ + init_sockaddr_in((struct sockaddr_in *) &ifr->ifr_addr, addr); + if(ioctl(s, SIOCSIFADDR, ifr) < 0) die("SIOCSIFADDR"); +} + +int main(int argc, char *argv[]) +{ + struct ifreq ifr; + int s; + unsigned int addr, mask, flags; + char astring[20]; + char mstring[20]; + char *updown, *brdcst, *loopbk, *ppp, *running, *multi; + + argc--; + argv++; + + if(argc == 0) return 0; + + memset(&ifr, 0, sizeof(struct ifreq)); + strncpy(ifr.ifr_name, argv[0], IFNAMSIZ); + ifr.ifr_name[IFNAMSIZ-1] = 0; + argc--, argv++; + + if((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { + die("cannot open control socket\n"); + } + + if (argc == 0) { + if (ioctl(s, SIOCGIFADDR, &ifr) < 0) { + perror(ifr.ifr_name); + return -1; + } else + addr = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr; + + if (ioctl(s, SIOCGIFNETMASK, &ifr) < 0) { + perror(ifr.ifr_name); + return -1; + } else + mask = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr; + + if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) { + perror(ifr.ifr_name); + return -1; + } else + flags = ifr.ifr_flags; + + sprintf(astring, "%d.%d.%d.%d", + addr & 0xff, + ((addr >> 8) & 0xff), + ((addr >> 16) & 0xff), + ((addr >> 24) & 0xff)); + sprintf(mstring, "%d.%d.%d.%d", + mask & 0xff, + ((mask >> 8) & 0xff), + ((mask >> 16) & 0xff), + ((mask >> 24) & 0xff)); + printf("%s: ip %s mask %s flags [", ifr.ifr_name, + astring, + mstring + ); + + updown = (flags & IFF_UP) ? "up" : "down"; + brdcst = (flags & IFF_BROADCAST) ? " broadcast" : ""; + loopbk = (flags & IFF_LOOPBACK) ? " loopback" : ""; + ppp = (flags & IFF_POINTOPOINT) ? " point-to-point" : ""; + running = (flags & IFF_RUNNING) ? " running" : ""; + multi = (flags & IFF_MULTICAST) ? " multicast" : ""; + printf("%s%s%s%s%s%s]\n", updown, brdcst, loopbk, ppp, running, multi); + return 0; + } + + while(argc > 0) { + if (!strcmp(argv[0], "up")) { + setflags(s, &ifr, IFF_UP, 0); + } else if (!strcmp(argv[0], "mtu")) { + argc--, argv++; + if (!argc) { + errno = EINVAL; + die("expecting a value for parameter \"mtu\""); + } + setmtu(s, &ifr, argv[0]); + } else if (!strcmp(argv[0], "-pointopoint")) { + setflags(s, &ifr, IFF_POINTOPOINT, 1); + } else if (!strcmp(argv[0], "pointopoint")) { + argc--, argv++; + if (!argc) { + errno = EINVAL; + die("expecting an IP address for parameter \"pointtopoint\""); + } + setdstaddr(s, &ifr, argv[0]); + setflags(s, &ifr, IFF_POINTOPOINT, 0); + } else if (!strcmp(argv[0], "down")) { + setflags(s, &ifr, 0, IFF_UP); + } else if (!strcmp(argv[0], "netmask")) { + argc--, argv++; + if (!argc) { + errno = EINVAL; + die("expecting an IP address for parameter \"netmask\""); + } + setnetmask(s, &ifr, argv[0]); + } else if (isdigit(argv[0][0])) { + setaddr(s, &ifr, argv[0]); + setflags(s, &ifr, IFF_UP, 0); + } + argc--, argv++; + } + return 0; +} |