diff options
Diffstat (limited to 'toys/pending/netstat.c')
| -rw-r--r-- | toys/pending/netstat.c | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/toys/pending/netstat.c b/toys/pending/netstat.c deleted file mode 100644 index c7ab62d0..00000000 --- a/toys/pending/netstat.c +++ /dev/null @@ -1,383 +0,0 @@ -/* netstat.c - Display Linux networking subsystem. - * - * Copyright 2012 Ranjan Kumar <ranjankumar.bth@gmail.com> - * Copyright 2013 Kyungwan Han <asura321@gmail.com> - * - * Not in SUSv4. - * -USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal", TOYFLAG_BIN)) -config NETSTAT - bool "netstat" - default n - help - usage: netstat [-pWrxwutneal] - - Display networking information. Default is netsat -tuwx - - -r routing table - -a all sockets (not just connected) - -l listening server sockets - -t TCP sockets - -u UDP sockets - -w raw sockets - -x unix sockets - -e extended info - -n don't resolve names - -W wide display - -p PID/Program name of sockets -*/ - -#define FOR_netstat -#include "toys.h" -#include <net/route.h> - -GLOBALS( - struct num_cache *inodes; - int wpad; -); - -// convert address into text format. -static void addr2str(int af, void *addr, unsigned port, char *buf, int len, - char *proto) -{ - int pos, count; - struct servent *ser = 0; - - // Convert to numeric address - if (!inet_ntop(af, addr, buf, 256)) { - *buf = 0; - - return; - } - buf[len] = 0; - pos = strlen(buf); - - // If there's no port number, it's a local :* binding, nothing to look up. - if (!port) { - if (len-pos<2) pos = len-2; - strcpy(buf+pos, ":*"); - - return; - } - - if (!(toys.optflags & FLAG_n)) { - struct addrinfo hints, *result, *rp; - char cut[4]; - - memset(&hints, 0, sizeof(struct addrinfo)); - hints.ai_family = af; - - if (!getaddrinfo(buf, NULL, &hints, &result)) { - socklen_t sock_len = (af == AF_INET) ? sizeof(struct sockaddr_in) - : sizeof(struct sockaddr_in6); - - // We assume that a failing getnameinfo dosn't stomp "buf" here. - for (rp = result; rp; rp = rp->ai_next) - if (!getnameinfo(rp->ai_addr, sock_len, buf, 256, 0, 0, 0)) break; - freeaddrinfo(result); - buf[len] = 0; - pos = strlen(buf); - } - - // Doesn't understand proto "tcp6", so truncate - memcpy(cut, proto, 3); - cut[3] = 0; - ser = getservbyport(htons(port), cut); - } - - // Append :service - count = snprintf(0, 0, ":%u", port); - if (ser) { - count = snprintf(0, 0, ":%s", ser->s_name); - // sheer paranoia - if (count>=len) { - count = len-1; - ser->s_name[count] = 0; - } - } - if (len-pos<count) pos = len-count; - if (ser) sprintf(buf+pos, ":%s", ser->s_name); - else sprintf(buf+pos, ":%u", port); -} - -// Display info for tcp/udp/raw -static void show_ip(char *fname) -{ - char *ss_state = "UNKNOWN", buf[12], *s, *label = strrchr(fname, '/')+1; - char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1", - "FIN_WAIT2", "TIME_WAIT", "CLOSE", "CLOSE_WAIT", - "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"}; - struct passwd *pw; - FILE *fp = fopen(fname, "r"); - - if (!fp) { - perror_msg("'%s'", fname); - return; - } - - if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header. - - while (fgets(toybuf, sizeof(toybuf), fp)) { - char lip[256], rip[256]; - union { - struct {unsigned u; unsigned char b[4];} i4; - struct {struct {unsigned a, b, c, d;} u; unsigned char b[16];} i6; - } laddr, raddr; - unsigned lport, rport, state, txq, rxq, num, uid, nitems; - unsigned long inode; - - // Try ipv6, then try ipv4 - nitems = sscanf(toybuf, - " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x %*X:%*X %*X %d %*d %ld", - &num, &laddr.i6.u.a, &laddr.i6.u.b, &laddr.i6.u.c, - &laddr.i6.u.d, &lport, &raddr.i6.u.a, &raddr.i6.u.b, - &raddr.i6.u.c, &raddr.i6.u.d, &rport, &state, &txq, &rxq, - &uid, &inode); - - if (nitems!=16) { - nitems = sscanf(toybuf, - " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld", - &num, &laddr.i4.u, &lport, &raddr.i4.u, &rport, &state, &txq, - &rxq, &uid, &inode); - - if (nitems!=10) continue; - nitems = AF_INET; - } else nitems = AF_INET6; - - // Should we display this? (listening or all or TCP/UDP/RAW) - if (!((toys.optflags & FLAG_l) && (!rport && (state & 0xA))) - && !(toys.optflags & FLAG_a) && !(rport & (0x10 | 0x20 | 0x40))) - continue; - - addr2str(nitems, &laddr, lport, lip, TT.wpad, label); - addr2str(nitems, &raddr, rport, rip, TT.wpad, label); - - // Display data - s = label; - if (strstart(&s, "tcp")) { - int sz = ARRAY_LEN(state_label); - if (!state || state >= sz) state = sz-1; - ss_state = state_label[state]; - } else if (strstart(&s, "udp")) { - if (state == 1) ss_state = state_label[state]; - else if (state == 7) ss_state = ""; - } else if (strstart(&s, "raw")) sprintf(ss_state = buf, "%u", state); - - if (!(toys.optflags & FLAG_n) && (pw = bufgetpwuid(uid))) - snprintf(toybuf, sizeof(toybuf), "%s", pw->pw_name); - else snprintf(toybuf, sizeof(toybuf), "%d", uid); - - printf("%-6s%6d%7d ", label, rxq, txq); - printf("%*.*s %*.*s ", -TT.wpad, TT.wpad, lip, -TT.wpad, TT.wpad, rip); - printf("%-11s", ss_state); - if ((toys.optflags & FLAG_e)) printf(" %-10s %-11ld", toybuf, inode); - if ((toys.optflags & FLAG_p)) { - struct num_cache *nc = get_num_cache(TT.inodes, inode); - - printf(" %s", nc ? nc->data : "-"); - } - xputc('\n'); - } - fclose(fp); -} - -static void show_unix_sockets(void) -{ - char *types[] = {"","STREAM","DGRAM","RAW","RDM","SEQPACKET","DCCP","PACKET"}, - *states[] = {"","LISTENING","CONNECTING","CONNECTED","DISCONNECTING"}, - *s, *ss; - unsigned long refcount, flags, type, state, inode; - FILE *fp = xfopen("/proc/net/unix", "r"); - - if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header. - - while (fgets(toybuf, sizeof(toybuf), fp)) { - unsigned offset = 0; - - // count = 6 or 7 (first field ignored, sockets don't always have filenames) - if (6<sscanf(toybuf, "%*p: %lX %*X %lX %lX %lX %lu %n", - &refcount, &flags, &type, &state, &inode, &offset)) - continue; - - // Linux exports only SO_ACCEPTCON since 2.3.15pre3 in 1999, but let's - // filter in case they add more someday. - flags &= 1<<16; - - // Only show unconnected listening sockets with -a - if (state==1 && flags && !(toys.optflags&FLAG_a)) continue; - - if (type==10) type = 7; // move SOCK_PACKET into line - if (type>ARRAY_LEN(types)) type = 0; - if (state>ARRAY_LEN(states) || (state==1 && !flags)) state = 0; - sprintf(toybuf, "[ %s]", flags ? "ACC " : ""); - - printf("unix %-6ld %-11s %-10s %-13s %8lu ", - refcount, toybuf, types[type], states[state], inode); - if (toys.optflags & FLAG_p) { - struct num_cache *nc = get_num_cache(TT.inodes, inode); - - printf("%-19.19s", nc ? nc->data : "-"); - } - - if (offset) { - if ((ss = strrchr(s = toybuf+offset, '\n'))) *ss = 0; - printf("%s", s); - } - xputc('\n'); - } - - fclose(fp); -} - -static int scan_pids(struct dirtree *node) -{ - char *s = toybuf+256; - struct dirent *entry; - DIR *dp; - int pid, dirfd; - - if (!node->parent) return DIRTREE_RECURSE; - if (!(pid = atol(node->name))) return 0; - - sprintf(toybuf, "/proc/%d/cmdline", pid); - if (!(readfile(toybuf, toybuf, 256))) return 0; - - sprintf(s, "%d/fd", pid); - if (-1==(dirfd = openat(dirtree_parentfd(node), s, O_RDONLY))) return 0; - if (!(dp = fdopendir(dirfd))) { - close(dirfd); - - return 0; - } - - while ((entry = readdir(dp))) { - s = toybuf+256; - if (!readlinkat0(dirfd, entry->d_name, s, sizeof(toybuf)-256)) continue; - // Can the "[0000]:" happen in a modern kernel? - if (strstart(&s, "socket:[") || strstart(&s, "[0000]:")) { - long long ll = atoll(s); - - sprintf(s, "%d/%s", pid, getbasename(toybuf)); - add_num_cache(&TT.inodes, ll, s, strlen(s)+1); - } - } - closedir(dp); - - return 0; -} - -/* - * extract inet4 route info from /proc/net/route file and display it. - */ -static void display_routes(void) -{ - static const char flagchars[] = "GHRDMDAC"; - static const unsigned flagarray[] = { - RTF_GATEWAY, RTF_HOST, RTF_REINSTATE, RTF_DYNAMIC, RTF_MODIFIED - }; - unsigned long dest, gate, mask; - int flags, ref, use, metric, mss, win, irtt; - char *out = toybuf, *flag_val; - char iface[64]={0}; - FILE *fp = xfopen("/proc/net/route", "r"); - - if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header. - - printf("Kernel IP routing table\n" - "Destination\tGateway \tGenmask \tFlags %s Iface\n", - !(toys.optflags&FLAG_e) ? " MSS Window irtt" : "Metric Ref Use"); - - while (fgets(toybuf, sizeof(toybuf), fp)) { - char *destip = 0, *gateip = 0, *maskip = 0; - - if (11 != sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d", iface, &dest, - &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt)) - break; - - // skip down interfaces. - if (!(flags & RTF_UP)) continue; - -// TODO /proc/net/ipv6_route - - if (dest) { - if (inet_ntop(AF_INET, &dest, out, 16)) destip = out; - } else destip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "default"; - out += 16; - - if (gate) { - if (inet_ntop(AF_INET, &gate, out, 16)) gateip = out; - } else gateip = (toys.optflags&FLAG_n) ? "0.0.0.0" : "*"; - out += 16; - -// TODO /24 - //For Mask - if (inet_ntop(AF_INET, &mask, out, 16)) maskip = out; - else maskip = "?"; - out += 16; - - //Get flag Values - flag_val = out; - *out++ = 'U'; - for (dest = 0; dest < ARRAY_LEN(flagarray); dest++) - if (flags&flagarray[dest]) *out++ = flagchars[dest]; - *out = 0; - if (flags & RTF_REJECT) *flag_val = '!'; - - printf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val); - if (!(toys.optflags & FLAG_e)) - printf("%5d %-5d %6d %s\n", mss, win, irtt, iface); - else printf("%-6d %-2d %7d %s\n", metric, ref, use, iface); - } - - fclose(fp); -} - -void netstat_main(void) -{ - int tuwx = FLAG_t|FLAG_u|FLAG_w|FLAG_x; - char *type = "w/o"; - - TT.wpad = (toys.optflags&FLAG_W) ? 51 : 23; - if (!(toys.optflags&(FLAG_r|tuwx))) toys.optflags |= tuwx; - if (toys.optflags & FLAG_r) display_routes(); - if (!(toys.optflags&tuwx)) return; - - if (toys.optflags & FLAG_a) type = "established and"; - else if (toys.optflags & FLAG_l) type = "only"; - - if (toys.optflags & FLAG_p) dirtree_read("/proc", scan_pids); - - if (toys.optflags&(FLAG_t|FLAG_u|FLAG_w)) { - printf("Active %s (%s servers)\n", "Internet connections", type); - printf("Proto Recv-Q Send-Q %*s %*s State ", -TT.wpad, "Local Address", - -TT.wpad, "Foreign Address"); - if (toys.optflags & FLAG_e) printf(" User Inode "); - if (toys.optflags & FLAG_p) printf(" PID/Program Name"); - xputc('\n'); - - if (toys.optflags & FLAG_t) { - show_ip("/proc/net/tcp"); - show_ip("/proc/net/tcp6"); - } - if (toys.optflags & FLAG_u) { - show_ip("/proc/net/udp"); - show_ip("/proc/net/udp6"); - } - if (toys.optflags & FLAG_w) { - show_ip("/proc/net/raw"); - show_ip("/proc/net/raw6"); - } - } - - if (toys.optflags & FLAG_x) { - printf("Active %s (%s servers)\n", "UNIX domain sockets", type); - - printf("Proto RefCnt Flags\t Type\t State\t %s Path\n", - (toys.optflags&FLAG_p) ? "PID/Program Name" : "I-Node"); - show_unix_sockets(); - } - - if ((toys.optflags & FLAG_p) && CFG_TOYBOX_FREE) - llist_traverse(TT.inodes, free); - toys.exitval = 0; -} |