| /* 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. |
| |
| -r Display routing table. |
| -a Display all sockets (Default: Connected). |
| -l Display listening server sockets. |
| -t Display TCP sockets. |
| -u Display UDP sockets. |
| -w Display Raw sockets. |
| -x Display Unix sockets. |
| -e Display other/more information. |
| -n Don't resolve names. |
| -W Wide Display. |
| -p Display PID/Program name for sockets. |
| */ |
| |
| #define FOR_netstat |
| #include "toys.h" |
| #include <net/route.h> |
| |
| typedef union _iaddr { |
| unsigned u; |
| unsigned char b[4]; |
| } iaddr; |
| |
| typedef union _iaddr6 { |
| struct { |
| unsigned a; |
| unsigned b; |
| unsigned c; |
| unsigned d; |
| } u; |
| unsigned char b[16]; |
| } iaddr6; |
| |
| #define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1) //IPv6 addr len + : + port + '\0' |
| |
| //For unix states |
| enum { |
| SOCK_ACCEPTCON = (1 << 16), //performed a listen. |
| SOCK_WAIT_DATA = (1 << 17), //wait data to read. |
| SOCK_NO_SPACE = (1 << 18), //no space to write. |
| }; |
| |
| #define SOCK_NOT_CONNECTED 1 |
| //For PID/Progrma Name |
| #define PROGRAM_NAME "PID/Program Name" |
| #define PROGNAME_LEN 21 |
| |
| typedef struct _pidlist { |
| struct _pidlist *next; |
| long inode; |
| char name[PROGNAME_LEN]; |
| } PID_LIST; |
| PID_LIST *pid_list = NULL; |
| |
| /* |
| * Get base name from the input name. |
| */ |
| static const char *get_basename(char *name) |
| { |
| const char *c = strrchr(name, '/'); |
| if (c) return c + 1; |
| return name; |
| } |
| /* |
| * copy string from src to dest -> only number of bytes. |
| */ |
| static char *safe_strncpy(char *dst, char *src, size_t size) |
| { |
| if(!size) return dst; |
| dst[--size] = '\0'; |
| return strncpy(dst, src, size); |
| } |
| |
| /* |
| * locate character in string. |
| */ |
| static char *strchr_nul(char *s, int c) |
| { |
| while(*s != '\0' && *s != c) s++; |
| return (char*)s; |
| } |
| |
| // Find out if the last character of a string matches with the given one. |
| // Don't underrun the buffer if the string length is 0. |
| static char *find_last_char(char *str, int c) |
| { |
| if (str && *str) { |
| size_t sz = strlen(str) - 1; |
| str += sz; |
| if ( (unsigned char)*str == c) return (char*)str; |
| } |
| return NULL; |
| } |
| /* |
| * Concat path and the file name. |
| */ |
| static char *append_pathandfile(char *path, char *fname) |
| { |
| char *c; |
| if (!path) path = ""; |
| c = find_last_char(path, '/'); |
| while (*fname == '/') fname++; |
| return xmprintf("%s%s%s", path, (c)? "" : "/", fname); |
| } |
| /* |
| * Concat sub-path and the file name. |
| */ |
| static char *append_subpathandfile(char *path, char *fname) |
| { |
| #define ISDOTORDOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2]))) |
| if(!fname) return NULL; |
| if(ISDOTORDOTDOT(fname)) return NULL; |
| return append_pathandfile(path, fname); |
| #undef ISDOTORDOTDOT |
| } |
| /* |
| * used to converts string into int and validate the input str for invalid int value or out-of-range. |
| */ |
| static unsigned get_strtou(char *str, char **endp, int base) |
| { |
| unsigned long uli; |
| char *endptr; |
| |
| if (!isalnum(str[0])) { |
| errno = ERANGE; |
| return UINT_MAX; |
| } |
| errno = 0; |
| uli = strtoul(str, &endptr, base); |
| if (uli > UINT_MAX) { |
| errno = ERANGE; |
| return UINT_MAX; |
| } |
| |
| if (endp) *endp = endptr; |
| if (endptr[0]) { |
| if (isalnum(endptr[0]) || errno) { //"123abc" or out-of-range |
| errno = ERANGE; |
| return UINT_MAX; |
| } |
| errno = EINVAL; |
| } |
| return uli; |
| } |
| /* |
| * used to retrive pid name from pid list. |
| */ |
| static const char *get_pid_name(unsigned long inode) |
| { |
| PID_LIST *tmp; |
| for (tmp = pid_list; tmp; tmp = tmp->next) |
| if (tmp->inode == inode) return tmp->name; |
| return "-"; |
| } |
| /* |
| * For TCP/UDP/RAW display data. |
| */ |
| static void display_data(unsigned rport, char *label, unsigned rxq, unsigned txq, char *lip, char *rip, unsigned state, unsigned long inode) |
| { |
| char *ss_state = "UNKNOWN", buf[12]; |
| char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1", "FIN_WAIT2", |
| "TIME_WAIT", "CLOSE", "CLOSE_WAIT", "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"}; |
| if (!strcmp(label, "tcp")) { |
| int sz = ARRAY_LEN(state_label); |
| if (!state || state >= sz) state = sz-1; |
| ss_state = state_label[state]; |
| } |
| else if (!strcmp(label, "udp")) { |
| if (state == 1) ss_state = state_label[state]; |
| else if (state == 7) ss_state = ""; |
| } |
| else if (!strcmp(label, "raw")) sprintf(ss_state = buf, "%u", state); |
| |
| if ( (toys.optflags & FLAG_W) && (toys.optflags & FLAG_p)) |
| xprintf("%3s %6d %6d %-51s %-51s %-12s%s\n", label, rxq, txq, lip, rip, ss_state, get_pid_name(inode)); |
| else if (toys.optflags & FLAG_W) |
| xprintf("%3s %6d %6d %-51s %-51s %-12s\n", label, rxq, txq, lip, rip, ss_state); |
| else if (toys.optflags & FLAG_p) |
| xprintf("%3s %6d %6d %-23s %-23s %-12s%s\n", label, rxq, txq, lip, rip, ss_state, get_pid_name(inode)); |
| else xprintf("%3s %6d %6d %-23s %-23s %-12s\n", label, rxq, txq, lip, rip, ss_state); |
| } |
| /* |
| * For TCP/UDP/RAW show data. |
| */ |
| static void show_data(unsigned rport, char *label, unsigned rxq, unsigned txq, char *lip, char *rip, unsigned state, unsigned long inode) |
| { |
| if (toys.optflags & FLAG_l) { |
| if (!rport && (state && 0xA)) display_data(rport, label, rxq, txq, lip, rip, state, inode); |
| } else if (toys.optflags & FLAG_a) display_data(rport, label, rxq, txq, lip, rip, state, inode); |
| //rport && (TCP | UDP | RAW) |
| else if (rport && (0x10 | 0x20 | 0x40)) display_data(rport, label, rxq, txq, lip, rip, state, inode); |
| } |
| /* |
| * used to get service name. |
| */ |
| static char *get_servname(int port, char *label) |
| { |
| int lport = htons(port); |
| if (!lport) return xmprintf("%s", "*"); |
| struct servent *ser = getservbyport(lport, label); |
| if (ser) return xmprintf("%s", ser->s_name); |
| return xmprintf("%u", (unsigned)ntohs(lport)); |
| } |
| /* |
| * used to convert address into text format. |
| */ |
| static void addr2str(int af, void *addr, unsigned port, char *buf, char *label) |
| { |
| char ip[ADDR_LEN] = {0,}; |
| if (!inet_ntop(af, addr, ip, ADDR_LEN)) { |
| *buf = '\0'; |
| return; |
| } |
| size_t iplen = strlen(ip); |
| if (!port) { |
| strncat(ip+iplen, ":*", ADDR_LEN-iplen-1); |
| memcpy(buf, ip, ADDR_LEN); |
| return; |
| } |
| |
| if (!(toys.optflags & FLAG_n)) { |
| struct addrinfo hints, *result, *rp; |
| |
| memset(&hints, 0, sizeof(struct addrinfo)); |
| hints.ai_family = af; |
| |
| if (!getaddrinfo(ip, NULL, &hints, &result)) { |
| char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,}; |
| socklen_t sock_len; |
| char *sname = NULL; |
| int plen = 0; |
| |
| if (af == AF_INET) sock_len = sizeof(struct sockaddr_in); |
| else sock_len = sizeof(struct sockaddr_in6); |
| |
| for (rp = result; rp; rp = rp->ai_next) |
| if (!getnameinfo(rp->ai_addr, sock_len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICSERV)) |
| break; |
| |
| freeaddrinfo(result); |
| sname = get_servname(port, label); |
| plen = strlen(sname); |
| if (*hbuf) { |
| memset(ip, 0, ADDR_LEN); |
| memcpy(ip, hbuf, (ADDR_LEN - plen - 2)); |
| iplen = strlen(ip); |
| } |
| snprintf(ip + iplen, ADDR_LEN-iplen, ":%s", sname); |
| free(sname); |
| } |
| } |
| else snprintf(ip+iplen, ADDR_LEN-iplen, ":%d", port); |
| memcpy(buf, ip, ADDR_LEN); |
| } |
| /* |
| * display ipv4 info for TCP/UDP/RAW. |
| */ |
| static void show_ipv4(char *fname, char *label) |
| { |
| FILE *fp = fopen((char *)fname, "r"); |
| if (!fp) { |
| perror_msg("'%s'", fname); |
| return; |
| } |
| fgets(toybuf, sizeof(toybuf), fp); //skip header. |
| while (fgets(toybuf, sizeof(toybuf), fp)) { |
| char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,}; |
| iaddr laddr, raddr; |
| unsigned lport, rport, state, txq, rxq, num, uid; |
| unsigned long inode; |
| |
| int nitems = sscanf(toybuf, " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld", |
| &num, &laddr.u, &lport, &raddr.u, &rport, &state, &txq, &rxq, &uid, &inode); |
| if (nitems == 10) { |
| addr2str(AF_INET, &laddr, lport, lip, label); |
| addr2str(AF_INET, &raddr, rport, rip, label); |
| show_data(rport, label, rxq, txq, lip, rip, state, inode); |
| } |
| }//End of While |
| fclose(fp); |
| } |
| /* |
| * display ipv6 info for TCP/UDP/RAW. |
| */ |
| static void show_ipv6(char *fname, char *label) |
| { |
| FILE *fp = fopen((char *)fname, "r"); |
| if (!fp) { |
| perror_msg("'%s'", fname); |
| return; |
| } |
| fgets(toybuf, sizeof(toybuf), fp); //skip header. |
| while (fgets(toybuf, sizeof(toybuf), fp)) { |
| char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,}; |
| iaddr6 laddr6, raddr6; |
| unsigned lport, rport, state, txq, rxq, num, uid; |
| unsigned long inode; |
| int nitems = sscanf(toybuf, " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x %*X:%*X %*X %d %*d %ld", |
| &num, &laddr6.u.a, &laddr6.u.b, &laddr6.u.c, &laddr6.u.d, &lport, &raddr6.u.a, &raddr6.u.b, |
| &raddr6.u.c, &raddr6.u.d, &rport, &state, &txq, &rxq, &uid, &inode); |
| if (nitems == 16) { |
| addr2str(AF_INET6, &laddr6, lport, lip, label); |
| addr2str(AF_INET6, &raddr6, rport, rip, label); |
| show_data(rport, label, rxq, txq, lip, rip, state, inode); |
| } |
| }//End of While |
| fclose(fp); |
| } |
| /* |
| * display unix socket info. |
| */ |
| static void show_unix_sockets(char *fname, char *label) |
| { |
| FILE *fp = fopen((char *)fname, "r"); |
| if (!fp) { |
| perror_msg("'%s'", fname); |
| return; |
| } |
| fgets(toybuf, sizeof(toybuf), fp); //skip header. |
| while (fgets(toybuf, sizeof(toybuf), fp)) { |
| unsigned long int refcount, label, flags, inode; |
| int nitems = 0, path_offset = 0, type, state; |
| char sock_flags[32] = {0,}, *sock_type, *sock_state, *bptr = toybuf; |
| |
| if (!toybuf[0]) continue; |
| nitems = sscanf(toybuf, "%*p: %lX %lX %lX %X %X %lu %n", |
| &refcount, &label, &flags, &type, &state, &inode, &path_offset); |
| //for state one less |
| if (nitems < 6) break; |
| if (toys.optflags & FLAG_l) { |
| if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) ) continue; |
| } else if (!(toys.optflags & FLAG_a)) { |
| if ((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) continue; |
| } |
| |
| //prepare socket type, state and flags. |
| { |
| char *ss_type[] = { "", "STREAM", "DGRAM", "RAW", "RDM", "SEQPACKET", "UNKNOWN"}; |
| char *ss_state[] = { "FREE", "LISTENING", "CONNECTING", "CONNECTED", "DISCONNECTING", "UNKNOWN"}; |
| |
| int sz = ARRAY_LEN(ss_type);//sizeof(ss_type)/sizeof(ss_type[0]); |
| if ( (type < SOCK_STREAM) || (type > SOCK_SEQPACKET) ) sock_type = ss_type[sz-1]; |
| else sock_type = ss_type[type]; |
| |
| sz = ARRAY_LEN(ss_state);//sizeof(ss_state)/sizeof(ss_state[0]); |
| if ((state < 0) || (state > sz-2)) sock_state = ss_state[sz-1]; |
| else if (state == SOCK_NOT_CONNECTED) { |
| if (flags & SOCK_ACCEPTCON) sock_state = ss_state[state]; |
| else sock_state = " "; |
| } else sock_state = ss_state[state]; |
| |
| strcpy(sock_flags, "[ "); |
| if (flags & SOCK_ACCEPTCON) strcat(sock_flags, "ACC "); |
| if (flags & SOCK_WAIT_DATA) strcat(sock_flags, "W "); |
| if (flags & SOCK_NO_SPACE) strcat(sock_flags, "N "); |
| strcat(sock_flags, "]"); |
| } |
| xprintf("%-5s %-6ld %-11s %-10s %-13s %6lu ", (!label ? "unix" : "??"), refcount, sock_flags, sock_type, sock_state, inode); |
| if (toys.optflags & FLAG_p) xprintf("%-20s", get_pid_name(inode)); |
| |
| bptr += path_offset; |
| *strchr_nul(bptr, '\n') = '\0'; |
| xprintf("%s\n", bptr); |
| }//End of while |
| fclose(fp); |
| } |
| /* |
| * extract inode value from the link. |
| */ |
| static long ss_inode(char *link) |
| { |
| long inode = -1; |
| //"link = socket:[12345]", get "12345" as inode. |
| if (!strncmp(link, "socket:[", sizeof("socket:[")-1)) { |
| inode = get_strtou(link + sizeof("socket:[")-1, (char**)&link, 0); |
| if (*link != ']') inode = -1; |
| } |
| //"link = [0000]:12345", get "12345" as inode. |
| else if (!strncmp(link, "[0000]:", sizeof("[0000]:")-1)) { |
| inode = get_strtou(link + sizeof("[0000]:")-1, NULL, 0); |
| //if not NULL terminated. |
| if (errno) inode = -1; |
| } |
| return inode; |
| } |
| /* |
| * add inode and progname in the pid list. |
| */ |
| static void add2list(long inode, char *progname) |
| { |
| PID_LIST *node = pid_list; |
| for(; node; node = node->next) { |
| if(node->inode == inode) |
| return; |
| } |
| PID_LIST *new = (PID_LIST *)xzalloc(sizeof(PID_LIST)); |
| new->inode = inode; |
| safe_strncpy(new->name, progname, PROGNAME_LEN-1); |
| new->next = pid_list; |
| pid_list = new; |
| } |
| /* |
| * add pid info in the list. |
| */ |
| static void extract_inode(char *path, char *progname) |
| { |
| DIR *dp; |
| struct dirent *entry; |
| |
| if (!(dp = opendir(path))) { |
| if (errno == EACCES) return; |
| else perror_exit("%s", path); |
| } |
| while ((entry = readdir(dp))) { |
| char *link = NULL, *fname = append_subpathandfile(path, entry->d_name); |
| if (!fname) continue; |
| link = xreadlink(fname); |
| if (link) { |
| long inode = ss_inode(link); |
| free(link); |
| if (inode != -1) add2list(inode, progname); |
| } |
| free(fname); |
| }//end of while. |
| closedir(dp); |
| } |
| /* |
| * prepare the list for all pids in /proc directory. |
| */ |
| static void get_pid_list(void) |
| { |
| DIR *dp; |
| struct dirent *entry; |
| char path[64] = {0,}; |
| uid_t uid = geteuid(); |
| |
| if (!(dp = opendir("/proc"))) perror_exit("opendir"); |
| |
| while ((entry = readdir(dp))) { |
| int fd, nitems = 0, length = 0; |
| char *pid, *progname; |
| |
| if (!isdigit(*entry->d_name)) continue; |
| pid = entry->d_name; |
| length = snprintf(path, sizeof(path), "/proc/%s/cmdline", entry->d_name); |
| if (sizeof(path) <= length) continue; |
| |
| fd = xopen(path, O_RDONLY); |
| nitems = readall(fd, toybuf, sizeof(toybuf) - 1); |
| xclose(fd); |
| if (nitems < 1) continue; |
| toybuf[nitems] = '\0'; |
| strcpy(path + length - (sizeof("cmdline")-1), "fd"); |
| progname = append_pathandfile(pid, (char *)get_basename(toybuf)); //e.g. progname = 2054/gnome-keyring-daemon |
| extract_inode(path, progname); |
| free(progname); |
| }//end of while. |
| closedir(dp); |
| |
| if (uid) fprintf(stderr, "(Not all processes could be identified, non-owned process info " |
| "will not be shown, you would have to be root to see it all.)\n"); |
| } |
| /* |
| * Dealloc pid list. |
| */ |
| static void clean_pid_list(void) |
| { |
| PID_LIST *tmp; |
| while (pid_list) { |
| tmp = pid_list->next; |
| free(pid_list); |
| pid_list = tmp; |
| } |
| } |
| /* |
| * For TCP/UDP/RAW show the header. |
| */ |
| static void show_header(void) |
| { |
| if ((toys.optflags & FLAG_W) && (toys.optflags & FLAG_p)) |
| xprintf("\nProto Recv-Q Send-Q %-51s %-51s %-12s%s\n", "Local Address", "Foreign Address", "State", PROGRAM_NAME); |
| else if (toys.optflags & FLAG_p) |
| xprintf("\nProto Recv-Q Send-Q %-23s %-23s %-12s%s\n", "Local Address", "Foreign Address", "State", PROGRAM_NAME); |
| else if (toys.optflags & FLAG_W) |
| xprintf("\nProto Recv-Q Send-Q %-51s %-51s State \n", "Local Address", "Foreign Address"); |
| else xprintf("\nProto Recv-Q Send-Q %-23s %-23s State \n", "Local Address", "Foreign Address"); |
| } |
| /* |
| * used to get the flag values for route command. |
| */ |
| static void get_flag_value(char **flagstr, int flags) |
| { |
| int i = 0; |
| char *str = *flagstr; |
| static const char flagchars[] = "GHRDMDAC"; |
| static const unsigned flagarray[] = { |
| RTF_GATEWAY, |
| RTF_HOST, |
| RTF_REINSTATE, |
| RTF_DYNAMIC, |
| RTF_MODIFIED, |
| RTF_DEFAULT, |
| RTF_ADDRCONF, |
| RTF_CACHE |
| }; |
| *str++ = 'U'; |
| while ( (*str = flagchars[i]) ) { |
| if (flags & flagarray[i++]) ++str; |
| } |
| } |
| /* |
| * extract inet4 route info from /proc/net/route file and display it. |
| */ |
| static void display_routes(int is_more_info, int notresolve) |
| { |
| #define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED) |
| unsigned long dest, gate, mask; |
| int flags, ref, use, metric, mss, win, irtt; |
| char iface[64]={0,}; |
| char *flag_val = xzalloc(10); //there are 9 flags "UGHRDMDAC" for route. |
| |
| FILE *fp = xfopen("/proc/net/route", "r"); |
| xprintf("Kernel IP routing table\n" |
| "Destination Gateway Genmask Flags %s Iface\n", |
| is_more_info ? " MSS Window irtt" : "Metric Ref Use"); |
| fgets(toybuf, sizeof(toybuf), fp); //skip 1st line. |
| while (fgets(toybuf, sizeof(toybuf), fp)) { |
| int nitems = 0; |
| char *destip = NULL, *gateip = NULL, *maskip = NULL; |
| memset(flag_val, 0, 10); |
| |
| nitems = sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", |
| iface, &dest, &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt); |
| if (nitems != 11) {//EOF with no (nonspace) chars read. |
| if ((nitems < 0) && feof(fp)) break; |
| perror_exit("sscanf"); |
| } |
| //skip down interfaces. |
| if (!(flags & RTF_UP)) continue; |
| |
| if (dest) {//For Destination |
| if (inet_ntop(AF_INET, &dest, toybuf, sizeof(toybuf)) ) destip = xstrdup(toybuf); |
| } else { |
| if (!notresolve) destip = xstrdup("default"); |
| else destip = xstrdup("0.0.0.0"); |
| } |
| if (gate) {//For Gateway |
| if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) ) gateip = xstrdup(toybuf); |
| } else { |
| if (!notresolve) gateip = xstrdup("*"); |
| else gateip = xstrdup("0.0.0.0"); |
| } |
| //For Mask |
| if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) ) maskip = xstrdup(toybuf); |
| |
| //Get flag Values |
| get_flag_value(&flag_val, (flags & IPV4_MASK)); |
| if (flags & RTF_REJECT) flag_val[0] = '!'; |
| xprintf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val); |
| if (destip) free(destip); |
| if (gateip) free(gateip); |
| if (maskip) free(maskip); |
| if (is_more_info) xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface); |
| else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface); |
| }//end of while. |
| fclose(fp); |
| if (flag_val) free(flag_val); |
| #undef IPV4_MASK |
| return; |
| } |
| /* |
| * netstat utily main function. |
| */ |
| void netstat_main(void) |
| { |
| #define IS_NETSTAT_PROTO_FLAGS_UP (toys.optflags & (FLAG_t | FLAG_u | FLAG_w | FLAG_x)) |
| int flag_listen_and_all = 0; |
| if (!toys.optflags) toys.optflags = FLAG_t | FLAG_u | FLAG_w | FLAG_x; |
| |
| //When a is set |
| if (toys.optflags & FLAG_a) flag_listen_and_all = 1; |
| //when a and l both are set |
| if ( (toys.optflags & FLAG_a) && (toys.optflags & FLAG_l) ) |
| toys.optflags &= ~FLAG_l; |
| //when only a is set |
| if ( (toys.optflags & FLAG_a) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) |
| toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; |
| //when only l is set |
| if ( (toys.optflags & FLAG_l) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) |
| toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; |
| //when only e/n is set |
| if( ((toys.optflags & FLAG_e) || (toys.optflags & FLAG_n)) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) |
| toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; |
| //when W is set |
| if ( (toys.optflags & FLAG_W) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) |
| toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; |
| //when p is set |
| if ( (toys.optflags & FLAG_p) && (!IS_NETSTAT_PROTO_FLAGS_UP) ) |
| toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x; |
| |
| //Display routing table. |
| if (toys.optflags & FLAG_r) { |
| display_routes(!(toys.optflags & FLAG_e), (toys.optflags & FLAG_n)); |
| return; |
| } |
| |
| if (toys.optflags & FLAG_p) get_pid_list(); |
| |
| //For TCP/UDP/RAW. |
| if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) || (toys.optflags & FLAG_w) ) { |
| xprintf("Active Internet connections "); |
| |
| if (flag_listen_and_all) xprintf("(servers and established)"); |
| else if (toys.optflags & FLAG_l) xprintf("(only servers)"); |
| else xprintf("(w/o servers)"); |
| |
| show_header(); |
| if (toys.optflags & FLAG_t) {//For TCP |
| show_ipv4("/proc/net/tcp", "tcp"); |
| show_ipv6("/proc/net/tcp6", "tcp"); |
| } |
| if (toys.optflags & FLAG_u) {//For UDP |
| show_ipv4("/proc/net/udp", "udp"); |
| show_ipv6("/proc/net/udp6", "udp"); |
| } |
| if (toys.optflags & FLAG_w) {//For raw |
| show_ipv4("/proc/net/raw", "raw"); |
| show_ipv6("/proc/net/raw6", "raw"); |
| } |
| } |
| if (toys.optflags & FLAG_x) {//For UNIX. |
| xprintf("Active UNIX domain sockets "); |
| if (flag_listen_and_all) xprintf("(servers and established)"); |
| else if (toys.optflags & FLAG_l) xprintf("(only servers)"); |
| else xprintf("(w/o servers)"); |
| |
| if (toys.optflags & FLAG_p) xprintf("\nProto RefCnt Flags Type State I-Node %s Path\n", PROGRAM_NAME); |
| else xprintf("\nProto RefCnt Flags Type State I-Node Path\n"); |
| show_unix_sockets("/proc/net/unix", "unix"); |
| } |
| if (toys.optflags & FLAG_p) clean_pid_list(); |
| if (toys.exitval) toys.exitval = 0; |
| #undef IS_NETSTAT_PROTO_FLAGS_UP |
| } |