Return to mysocket.c CVS log

Up to [local] / OpenXM / src / ox_toolkit

Annotation of OpenXM/src/ox_toolkit/mysocket.c, Revision 1.1

1.1     ! ohara       1: /* -*- mode: C; coding: euc-japan -*- */
        !             2: /* $OpenXM$ */
        !             3: /*
        !             4: setsockopt()してオプションを設定後,
        !             5: socket, bind
        !             6: するとローカルポートが割り当てられる。
        !             7: その後, getsockname によってポート番号が求まる.
        !             8: */
        !             9:
        !            10: #include <stdio.h>
        !            11: #include <stdlib.h>
        !            12: #include <unistd.h>
        !            13: #include <errno.h>
        !            14: #include <netdb.h>
        !            15: #include <netinet/in.h>
        !            16: #include <sys/types.h>
        !            17: #include <sys/socket.h>
        !            18: #include <fcntl.h>
        !            19:
        !            20: #if defined(__sun__)
        !            21: #include <arpa/inet.h>
        !            22: #endif
        !            23:
        !            24: #include "mysocket.h"
        !            25:
        !            26: static int getsocket(struct sockaddr_in *mp, char *host, short port)
        !            27: {
        !            28:     struct hostent *ent = gethostbyname(host);
        !            29:
        !            30:     memset(mp, '\0', sizeof(struct sockaddr_in));
        !            31:     mp->sin_family = AF_INET;
        !            32:     mp->sin_port = htons(port);
        !            33:     memcpy((char *)&mp->sin_addr, ent->h_addr, ent->h_length);
        !            34:
        !            35:     return socket(AF_INET, SOCK_STREAM, 0);
        !            36: }
        !            37:
        !            38: int mysocketAccept(int s_waiting)
        !            39: {
        !            40:     int val = accept(s_waiting, NULL, NULL);
        !            41:     return val;
        !            42: }
        !            43:
        !            44: int mysocketListen(char *hostname, short *portp)
        !            45: {
        !            46:     int option;
        !            47:     int tmp;
        !            48:     struct sockaddr_in me;
        !            49:
        !            50:     int s_waiting = getsocket(&me, hostname, *portp);
        !            51:
        !            52:     option = 1;
        !            53:     setsockopt(s_waiting, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
        !            54:
        !            55:     if (bind(s_waiting, (struct sockaddr *)&me, sizeof(me)) < 0) {
        !            56:         fprintf(stderr, "bind: failed.\n");
        !            57:         exit(1);
        !            58:     }
        !            59:
        !            60:     tmp = sizeof(me);
        !            61:     if (getsockname(s_waiting, (struct sockaddr *)&me, &tmp) < 0) {
        !            62:         fprintf(stderr, "getsockname is failed.\n");
        !            63:         exit(1);
        !            64:     }
        !            65:
        !            66:     *portp = ntohs(me.sin_port);
        !            67:
        !            68:     if (listen(s_waiting, 1) < 0) {
        !            69:         fprintf(stderr, "listen: failed.\n");
        !            70:         exit(1);
        !            71:     }
        !            72:
        !            73:     return s_waiting;
        !            74: }
        !            75:
        !            76: int mysocketOpen(char* hostname, short port)
        !            77: {
        !            78:     struct sockaddr_in serv;
        !            79:     int s = getsocket(&serv, hostname, port);
        !            80:
        !            81:     fprintf(stderr, "get socket address for port number %d.\n", port);
        !            82:     if (connect(s, (struct sockaddr *)&serv, sizeof(serv)) != 0) {
        !            83:         fprintf(stderr, "connect: fail! socket = %d, errno = %d\n", s, errno);
        !            84:         exit(-1);
        !            85:     }
        !            86:     return s;
        !            87: }
        !            88:
        !            89: #if 0
        !            90: int mypipe(char *program, int fd1, int fd2)
        !            91: {
        !            92:     int sockfd[2];
        !            93:     if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockfd) < 0) {
        !            94:         fprintf(stderr, "socketpair: fail! errno = %d\n", errno);
        !            95:     }
        !            96:     if (fork() == 0) {
        !            97:         /* 子プロセス */
        !            98:         close(sockfd[0]);
        !            99:         dup2(sockfd[1], fd1);
        !           100:         dup2(sockfd[1], fd2);
        !           101:         execl(program, program, NULL);
        !           102:   }
        !           103:   /* 親プロセス */
        !           104:     close(sockfd[1]);
        !           105:     return sockfd[0];
        !           106: }
        !           107: #endif