?? linux網絡編程一步一步學-udp組播--linux軟件下載源碼編程文章資料周立發.mht
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<H2 =
class=3DdiaryTitle>Linux=CD=F8=C2=E7=B1=E0=B3=CC=D2=BB=B2=BD=D2=BB=B2=BD=D1=
=A7-UDP=D7=E9=B2=A5</H2><B>=B9=D8=BC=FC=B4=CA</B>=A3=BA <A=20
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<A=20
href=3D"http://tag.bokee.com/tag/UDP" target=3D_blank>UDP</A> =
<A=20
href=3D"http://tag.bokee.com/tag/multicast" =
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<A href=3D"http://tag.bokee.com/tag/recvfrom"=20
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=20
&=
nbsp; &n=
bsp; &nb=
sp; =20
<P>=D7=E9=B2=A5=BF=CD=BB=A7=B6=CB=B4=FA=C2=EB=C8=E7=CF=C2=A3=BA<BR><BR>
<TABLE style=3D"WIDTH: 100%" cellSpacing=3D1 cellPadding=3D1 =
align=3Dbaseline=20
border=3D1><TBODY>
<TR>
<TD><BR>#include <sys/types.h><BR>#include=20
<sys/socket.h><BR>#include <arpa/inet.h><BR>#include=20
<stdio.h><BR>#include <stdlib.h><BR>#include=20
=
<string.h><BR><SYS><SYS><ARPA><STDIO.H><STDLIB.H><STRING.H><SYS><SY=
S><ARPA><STDIO.H><STDLIB.H><STRING.H><BR>#define=20
BUFLEN=20
=
255<BR>/*****************************************************************=
****<BR>*filename:=20
mcastclient.c<BR>*purpose: =
=D1=DD=CA=BE=D7=E9=B2=A5=B1=E0=B3=CC=B5=C4=BB=F9=B1=BE=B2=BD=D6=E8=A3=AC=C6=
=E4=CA=B5=D5=E2=BE=CD=CA=C7=D2=BB=B8=F6=BB=F9=B1=BE=B5=C4UDP=BF=CD=BB=A7=B6=
=CB=B3=CC=D0=F2<BR>*tidied by:=20
zhoulifa(zhoulifa@163.com) =
=D6=DC=C1=A2=B7=A2(http://zhoulifa.bokee.com)<BR>Linux=B0=AE=BA=C3=D5=DF =
Linux=D6=AA=CA=B6=B4=AB=B2=A5=D5=DF SOHO=D7=E5 =BF=AA=B7=A2=D5=DF =
=D7=EE=C9=C3=B3=A4C=D3=EF=D1=D4<BR>*date time:2007-01-25 =
13:10:00<BR>*Note:=20
=
=C8=CE=BA=CE=C8=CB=BF=C9=D2=D4=C8=CE=D2=E2=B8=B4=D6=C6=B4=FA=C2=EB=B2=A2=D4=
=CB=D3=C3=D5=E2=D0=A9=CE=C4=B5=B5=A3=AC=B5=B1=C8=BB=B0=FC=C0=A8=C4=E3=B5=C4=
=C9=CC=D2=B5=D3=C3=CD=BE<BR>* =B5=AB=C7=EB=D7=F1=D1=ADGPL<BR>*Thanks to: =
=
Google.com<BR>*Hope:=CF=A3=CD=FB=D4=BD=C0=B4=D4=BD=B6=E0=B5=C4=C8=CB=B9=B1=
=CF=D7=D7=D4=BC=BA=B5=C4=C1=A6=C1=BF=A3=AC=CE=AA=BF=C6=D1=A7=BC=BC=CA=F5=B7=
=A2=D5=B9=B3=F6=C1=A6<BR>*=20
=
=BF=C6=BC=BC=D5=BE=D4=DA=BE=DE=C8=CB=B5=C4=BC=E7=B0=F2=C9=CF=BD=F8=B2=BD=B8=
=FC=BF=EC=A3=A1=B8=D0=D0=BB=D3=D0=BF=AA=D4=B4=C7=B0=B1=B2=B5=C4=B9=B1=CF=D7=
=A3=A1<BR>***************************************************************=
******/<BR>int=20
main(int argc, char **argv)<BR>{<BR>struct sockaddr_in peeraddr,=20
myaddr;<BR><BR>int sockfd;<BR>char recmsg[BUFLEN + 1];<BR>unsigned =
int=20
socklen;<BR><BR>/* =B4=B4=BD=A8 socket =D3=C3=D3=DAUDP=CD=A8=D1=B6 =
*/<BR>sockfd =3D socket(AF_INET,=20
SOCK_DGRAM, 0);<BR>if (sockfd < 0) {<BR>printf("socket creating =
error\n");<BR>exit(1);<BR>}<BR>socklen =3D sizeof(struct=20
sockaddr_in);<BR><BR>/* =
=C9=E8=D6=C3=B6=D4=B7=BD=B5=C4=B6=CB=BF=DA=BA=CDIP=D0=C5=CF=A2 =
*/<BR>memset(&peeraddr, 0,=20
socklen);<BR>peeraddr.sin_family =3D AF_INET;<BR>if=20
(argv[2])<BR>peeraddr.sin_port =3D=20
htons(atoi(argv[2]));<BR>else<BR>peeraddr.sin_port =3D =
htons(7838);<BR>if=20
(argv[1]) {<BR>/* =
=D7=A2=D2=E2=D5=E2=C0=EF=C9=E8=D6=C3=B5=C4=B6=D4=B7=BD=B5=D8=D6=B7=CA=C7=D6=
=B8=D7=E9=B2=A5=B5=D8=D6=B7=A3=AC=B6=F8=B2=BB=CA=C7=B6=D4=B7=BD=B5=C4=CA=B5=
=BC=CAIP=B5=D8=D6=B7 */<BR>if=20
(inet_pton(AF_INET, argv[1], &peeraddr.sin_addr) <=3D 0)=20
{<BR>printf("wrong group address!\n");<BR>exit(0);<BR>}<BR>} else=20
{<BR>printf("no group address!\n");<BR>exit(0);<BR>}<BR><BR>/*=20
=C9=E8=D6=C3=D7=D4=BC=BA=B5=C4=B6=CB=BF=DA=BA=CDIP=D0=C5=CF=A2 =
*/<BR>memset(&myaddr, 0, socklen);<BR>myaddr.sin_family =3D=20
AF_INET;<BR>if (argv[4])<BR>myaddr.sin_port =3D=20
htons(atoi(argv[4]));<BR>else<BR>myaddr.sin_port =3D =
htons(23456);<BR><BR>if=20
(argv[3]) {<BR>if (inet_pton(AF_INET, argv[3], =
&myaddr.sin_addr) <=3D=20
0) {<BR>printf("self ip address error!\n");<BR>exit(0);<BR>}<BR>}=20
else<BR>myaddr.sin_addr.s_addr =3D INADDR_ANY;<BR><BR>/*=20
=
=B0=F3=B6=A8=D7=D4=BC=BA=B5=C4=B6=CB=BF=DA=BA=CDIP=D0=C5=CF=A2=B5=BDsocke=
t=C9=CF */<BR>if (bind<BR>(sockfd, (struct sockaddr *)=20
&myaddr,<BR>sizeof(struct sockaddr_in)) =3D=3D -1) =
{<BR>printf("Bind=20
error\n");<BR>exit(0);<BR>}<BR><BR>/* =
=D1=AD=BB=B7=BD=D3=CA=DC=D3=C3=BB=A7=CA=E4=C8=EB=B5=C4=CF=FB=CF=A2=B7=A2=CB=
=CD=D7=E9=B2=A5=CF=FB=CF=A2 */<BR>for (;;)=20
{<BR>/* =BD=D3=CA=DC=D3=C3=BB=A7=CA=E4=C8=EB */<BR>bzero(recmsg, =
BUFLEN + 1);<BR>if (fgets(recmsg,=20
BUFLEN, stdin) =3D=3D (char *) EOF)<BR>exit(0);<BR>/* =
=B7=A2=CB=CD=CF=FB=CF=A2 */<BR>if=20
(sendto<BR>(sockfd, recmsg, strlen(recmsg), 0,<BR>(struct sockaddr =
*)=20
&peeraddr,<BR>sizeof(struct sockaddr_in)) < 0) =
{<BR>printf("sendto=20
error!\n");<BR>exit(3);<BR>}<BR>printf("'%s' send ok\n",=20
=
recmsg);<BR>}<BR>}<BR></STRING.H></STDLIB.H></STDIO.H></ARPA></SYS></SYS>=
</STRING.H></STDLIB.H></STDIO.H></ARPA></SYS></SYS></TD></TR></TBODY></TA=
BLE><BR>=D7=E9=B2=A5=B7=FE=CE=F1=C6=F7=B6=CB=B3=CC=D0=F2=D4=B4=B4=FA=C2=EB=
=CE=AA=A3=BA<BR>
<TABLE style=3D"WIDTH: 100%" cellSpacing=3D1 cellPadding=3D1 =
align=3Dbaseline=20
border=3D1><TBODY>
<TR>
<TD><BR>#include <sys/types.h><BR>#include=20
<sys/socket.h><BR>#include <arpa/inet.h><BR>#include=20
<stdio.h><BR>#include <stdlib.h><BR>#include=20
<string.h><BR>#include <netdb.h><BR>#include=20
=
<errno.h><BR><SYS><SYS><ARPA><STDIO.H><STDLIB.H><STRING.H><NETDB.H>=
<ERRNO.H><SYS><SYS><ARPA><STDIO.H><STDLIB.H><STRING.H><NETDB.H><ERRNO.H><=
BR>#define=20
BUFLEN=20
=
255<BR>/*****************************************************************=
****<BR>*filename:=20
mcastserver.c<BR>*purpose: =
=D1=DD=CA=BE=D7=E9=B2=A5=B1=E0=B3=CC=B5=C4=BB=F9=B1=BE=B2=BD=D6=E8=A3=AC=D7=
=E9=B2=A5=B7=FE=CE=F1=C6=F7=B6=CB=A3=AC=B9=D8=BC=FC=D4=DA=D3=DA=BC=D3=C8=EB=
=D7=E9<BR>*tidied by:=20
zhoulifa(zhoulifa@163.com) =
=D6=DC=C1=A2=B7=A2(http://zhoulifa.bokee.com)<BR>Linux=B0=AE=BA=C3=D5=DF =
Linux=D6=AA=CA=B6=B4=AB=B2=A5=D5=DF SOHO=D7=E5 =BF=AA=B7=A2=D5=DF =
=D7=EE=C9=C3=B3=A4C=D3=EF=D1=D4<BR>*date time:2007-01-25 =
13:20:00<BR>*Note:=20
=
=C8=CE=BA=CE=C8=CB=BF=C9=D2=D4=C8=CE=D2=E2=B8=B4=D6=C6=B4=FA=C2=EB=B2=A2=D4=
=CB=D3=C3=D5=E2=D0=A9=CE=C4=B5=B5=A3=AC=B5=B1=C8=BB=B0=FC=C0=A8=C4=E3=B5=C4=
=C9=CC=D2=B5=D3=C3=CD=BE<BR>* =B5=AB=C7=EB=D7=F1=D1=ADGPL<BR>*Thanks to: =
=
Google.com<BR>*Hope:=CF=A3=CD=FB=D4=BD=C0=B4=D4=BD=B6=E0=B5=C4=C8=CB=B9=B1=
=CF=D7=D7=D4=BC=BA=B5=C4=C1=A6=C1=BF=A3=AC=CE=AA=BF=C6=D1=A7=BC=BC=CA=F5=B7=
=A2=D5=B9=B3=F6=C1=A6<BR>*=20
=
=BF=C6=BC=BC=D5=BE=D4=DA=BE=DE=C8=CB=B5=C4=BC=E7=B0=F2=C9=CF=BD=F8=B2=BD=B8=
=FC=BF=EC=A3=A1=B8=D0=D0=BB=D3=D0=BF=AA=D4=B4=C7=B0=B1=B2=B5=C4=B9=B1=CF=D7=
=A3=A1<BR>***************************************************************=
******/<BR>int=20
main(int argc, char **argv)<BR>{<BR>struct sockaddr_in =
peeraddr;<BR>struct=20
in_addr ia;<BR>int sockfd;<BR>char recmsg[BUFLEN + 1];<BR>unsigned =
int=20
socklen, n;<BR>struct hostent *group;<BR>struct ip_mreq =
mreq;<BR><BR>/* =B4=B4=BD=A8=20
socket =D3=C3=D3=DAUDP=CD=A8=D1=B6 */<BR>sockfd =3D =
socket(AF_INET, SOCK_DGRAM, 0);<BR>if=20
(sockfd < 0) {<BR>printf("socket creating err in=20
udptalk\n");<BR>exit(1);<BR>}<BR><BR>/* =
=C9=E8=D6=C3=D2=AA=BC=D3=C8=EB=D7=E9=B2=A5=B5=C4=B5=D8=D6=B7 =
*/<BR>bzero(&mreq,=20
sizeof(struct ip_mreq));<BR>if (argv[1]) {<BR>if ((group =3D=20
gethostbyname(argv[1])) =3D=3D (struct hostent *) 0)=20
{<BR>perror("gethostbyname");<BR>exit(errno);<BR>}<BR>} else=20
{<BR>printf<BR>("you should give me a group address,=20
=
224.0.0.0-239.255.255.255\n");<BR>exit(errno);<BR>}<BR><BR>bcopy((void =
*)=20
group->h_addr, (void *) &ia, group->h_length);<BR>/* =
=C9=E8=D6=C3=D7=E9=B5=D8=D6=B7=20
*/<BR>bcopy(&ia, &mreq.imr_multiaddr.s_addr, sizeof(struct =
in_addr));<BR><BR>/* =
=C9=E8=D6=C3=B7=A2=CB=CD=D7=E9=B2=A5=CF=FB=CF=A2=B5=C4=D4=B4=D6=F7=BB=FA=B5=
=C4=B5=D8=D6=B7=D0=C5=CF=A2 */<BR>mreq.imr_interface.s_addr =3D=20
htonl(INADDR_ANY);<BR><BR>/* =
=B0=D1=B1=BE=BB=FA=BC=D3=C8=EB=D7=E9=B2=A5=B5=D8=D6=B7=A3=AC=BC=B4=B1=BE=BB=
=FA=CD=F8=BF=A8=D7=F7=CE=AA=D7=E9=B2=A5=B3=C9=D4=B1=A3=AC=D6=BB=D3=D0=BC=D3=
=C8=EB=D7=E9=B2=C5=C4=DC=CA=D5=B5=BD=D7=E9=B2=A5=CF=FB=CF=A2 */<BR>if=20
(setsockopt<BR>(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP,=20
&mreq,<BR>sizeof(struct ip_mreq)) =3D=3D -1)=20
{<BR>perror("setsockopt");<BR>exit(-1);<BR>}<BR><BR>socklen =3D=20
sizeof(struct sockaddr_in);<BR>memset(&peeraddr, 0,=20
socklen);<BR>peeraddr.sin_family =3D AF_INET;<BR>if=20
(argv[2])<BR>peeraddr.sin_port =3D=20
htons(atoi(argv[2]));<BR>else<BR>peeraddr.sin_port =3D =
htons(7838);<BR>if=20
(argv[1]) {<BR>if (inet_pton(AF_INET, argv[1], =
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