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Annotation of embedaddon/hping2/linux_sockpacket.c, revision 1.1

1.1     ! misho       1: /* 
        !             2:  * $smu-mark$ 
        !             3:  * $name: linux_sockpacket.c$ 
        !             4:  * $author: Salvatore Sanfilippo <antirez@invece.org>$ 
        !             5:  * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$ 
        !             6:  * $license: This software is under GPL version 2 of license$ 
        !             7:  * $date: Fri Nov  5 11:55:48 MET 1999$ 
        !             8:  * $rev: 8$ 
        !             9:  */ 
        !            10: 
        !            11: #include "hping2.h"
        !            12: 
        !            13: #if (defined OSTYPE_LINUX) && (!defined FORCE_LIBPCAP)
        !            14: #include <sys/types.h>
        !            15: #include <sys/socket.h>
        !            16: #include <netinet/in.h>
        !            17: #include <unistd.h>            /* close */
        !            18: #include <stdio.h>
        !            19: 
        !            20: #include "globals.h"
        !            21: 
        !            22: static void enlarge_recvbuf(int fd)
        !            23: {
        !            24:        int val = 131070;
        !            25:        int len = sizeof(val);
        !            26: 
        !            27:        /* Don't check the error: non fatal */
        !            28:        setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (const char *) &val, len);
        !            29: }
        !            30: 
        !            31: int open_sockpacket()
        !            32: {
        !            33:        int s;
        !            34: 
        !            35:        if (opt_debug)
        !            36:                printf("DEBUG: Trying to open PF_PACKET socket... ");
        !            37: 
        !            38:        s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_IP));
        !            39: 
        !            40:        if (s == -1) {
        !            41:                if (opt_debug) {
        !            42:                        printf("DEBUG: failed ( 2.0.x kernel? )\n");
        !            43:                        printf("DEBUG: Trying to open SOCK_PACKET socket... ");
        !            44:                }
        !            45:                s = socket(AF_INET, SOCK_PACKET, htons(ETH_P_IP));
        !            46:        }
        !            47: 
        !            48:        if (s == -1) {
        !            49:                perror("[open_sockpacket] socket()");
        !            50:                return -1;
        !            51:        }
        !            52:        enlarge_recvbuf(s);
        !            53: 
        !            54:        if (opt_debug)
        !            55:                printf("DEBUG: PF_PACKET, SOCK_RAW open OK\n");
        !            56: 
        !            57:        return s;
        !            58: }
        !            59: 
        !            60: int close_sockpacket(int s)
        !            61: {
        !            62:        return close(s);
        !            63: }
        !            64: #endif /* OSTYPE_LINUX && !FORCE_LIBPCAP */