As we all know,most our projects are need to use the socket to programme.Use socket we can connect our device to others and our client to the Internet,so it's made our product more powerful.Now,let's begin the key part-pjlib socket.
The date types and functions are too much,if you need some of them,just click the links.
test1:get hostname and host address
1 //PJLIP I/O 2 //Socket test->get hostname and hostaddress 3 //heat nan 4 #include5 int main() 6 { 7 pj_status_t status; 8 pj_in_addr hostaddr; //This structure describes Internet address. 9 // dada fields pj_uint32_t s_addr. The 32bit IP address. 10 unsigned char *hostaddr_str;11 const pj_str_t *hostname;12 //pj_init13 status=pj_init();14 if(status!=PJ_SUCCESS)15 {16 PJ_LOG(3,(" ","init failed!"));17 }18 //gethostname19 hostname=pj_gethostname();20 if(!hostname||!hostname->ptr||!hostname->slen)21 {22 PJ_LOG(3,( "gethostname","faild"));23 }24 else25 {26 PJ_LOG(3,("gethostname","the hostname is %s",hostname->ptr));27 }28 hostaddr=pj_gethostaddr();29 if(hostaddr.s_addr)30 {31 hostaddr_str=pj_inet_ntoa(hostaddr);//function pj_in_addr -> char *32 //Convert an Internet host address given in network byte order to string in standard numbers and dots notation.33 PJ_LOG(3,("gethostaddress","%s",hostaddr_str));34 }35 else36 {37 PJ_LOG(3,("gethostaddress","failed"));38 }39 40 pj_shutdown();41 getchar();//show the result before you enter any key42 }
test2：sendto and recv message use udp;
1 // PJLIB I/O UDP test 2 //heat nan 3 //server 4 #include5 #define UDP_PORT 6000 6 #define ADDRESS "127.0.0.1" 7 #define N 100 8 int main( ) 9 {10 pj_status_t status;11 pj_sockaddr_in addr;12 int length=sizeof(addr);13 pj_sock_t cs;14 pj_sock_t ss;15 pj_sockaddr_in daddr;16 pj_sockaddr_in saddr;17 pj_str_t s;18 pj_str_t* IP_Addr;19 char recvbuff[N+5];20 char sendbuff[N+5];21 pj_ssize_t len1;22 status=pj_init();23 if(status!=PJ_SUCCESS)24 {25 PJ_LOG(3,("pj_init","failed"));26 }27 28 //now we creat a socket ss29 status=pj_sock_socket(pj_AF_INET(),pj_SOCK_DGRAM(),0,&ss);30 if(status!=0)31 {32 PJ_LOG(3,("creat ss socket","failed"));33 }34 //now we creat a socket cs 35 status=pj_sock_socket(pj_AF_INET(),pj_SOCK_DGRAM(),0,&cs);36 if(status!=0)37 {38 PJ_LOG(3,("creat cs socket","failed"));39 }40 41 42 pj_bzero(&daddr,sizeof(daddr));43 daddr.sin_family=pj_AF_INET();44 daddr.sin_port=pj_htons(UDP_PORT);45 IP_Addr=pj_cstr(&s,ADDRESS);46 daddr.sin_addr=pj_inet_addr(IP_Addr);47 48 status=pj_sock_bind(ss,&daddr,sizeof(daddr));49 if(status!=0)50 {51 PJ_LOG(3,("pj_sock_bind ","bind ss failed"));52 }53 54 55 /* 56 pj_bzero(&saddr,sizeof(saddr));57 saddr.sin_family=pj_AF_INET();58 saddr.sin_port=pj_htons(UDP_PORT-1);59 IP_Addr=pj_cstr(&s,ADDRESS);60 saddr.sin_addr=pj_inet_addr(IP_Addr);61 62 status=pj_sock_bind(cs,&saddr,sizeof(saddr));63 if(status!=0)64 {65 PJ_LOG(3,("pj_sock_bind ","bind cs failed"));66 }67 */68 pj_create_random_string(sendbuff, N);69 sendbuff[N-1] = '\0';70 PJ_LOG(3,("string","%s",sendbuff));71 len1=sizeof(sendbuff);72 73 74 //pj_sock_sendto: Transmit data to the socket to the specified address.75 status=pj_sock_sendto(cs,sendbuff,&len1,0,&daddr,sizeof(daddr));76 if(status!=PJ_SUCCESS)77 {78 PJ_LOG(3,("sendto","failed"));79 }80 81 pj_bzero(&addr,sizeof(addr));82 //pj_sock_recv: Receives data stream or message coming to the specified socket.83 status=pj_sock_recv(ss,recvbuff,&len1,0);84 if(status!=PJ_SUCCESS)85 {86 PJ_LOG(3,("recv","failed"));87 }88 else89 {90 PJ_LOG(3,("content","%s",recvbuff));91 }92 pj_shutdown();93 getchar();94 95 }
test3:udp test: the client and server
In this part I wanna write a program like the classical UDP socket demo,that is to say a simple demo one person send message and the other receive the message,they do it by turn.
But when I do that I find there are some differences between the formal socket and the pjlib socket.
Some function I used like in C/C++ steps,but not successed,such as recvfrom and send.If someone who knows that please tell me,thank you!
In my project,there still have a problem.That is not only the client need the server's IP,but the server needs the client too.
1 //UDP test 2 //server 3 //heat nan 4 //notice: the client should send the message first,then the server.And every time the size of the message you send should not too big! 5 #include6 #define UDP_PORT 6000 7 #define ADDRESS "127.0.0.1" 8 #define N 100 9 #define M 5010 int main()11 { 12 pj_status_t status;13 pj_sock_t cs;14 pj_sock_t ss;15 pj_sockaddr_in daddr,saddr;16 pj_str_t s;17 pj_str_t* IP_Addr;18 char sendbuff[M+5],recvbuff[N+5];19 pj_ssize_t len1,len2;20 status=pj_init();21 if(status!=PJ_SUCCESS)22 {23 PJ_LOG(3,("pj_init","failed"));24 }25 26 status=pj_sock_socket(pj_AF_INET(),pj_SOCK_DGRAM(),0,&ss);27 if(status!=0)28 {29 PJ_LOG(3,("creat ss socket","failed"));30 }31 32 pj_bzero(&daddr,sizeof(daddr));33 daddr.sin_family=pj_AF_INET();34 daddr.sin_port=pj_htons(UDP_PORT);35 IP_Addr=pj_cstr(&s,ADDRESS);36 daddr.sin_addr.s_addr=pj_htonl(PJ_INADDR_ANY);37 38 status=pj_sock_bind(ss,&daddr,sizeof(daddr));39 if(status!=0)40 {41 PJ_LOG(3,("pj_sock_bind ","bind ss failed"));42 }43 44 45 pj_bzero(&saddr,sizeof(saddr));46 saddr.sin_family=pj_AF_INET();47 saddr.sin_port=pj_htons(UDP_PORT-1);48 IP_Addr=pj_cstr(&s,ADDRESS);49 saddr.sin_addr=pj_inet_addr(IP_Addr);50 51 while(1){52 len1=N;53 status=pj_sock_recv(ss,recvbuff,&len1,0);54 if(status==PJ_SUCCESS)55 {56 PJ_LOG(3,("recv","success"));57 PJ_LOG(3,("context","%s",recvbuff));58 }59 60 else61 {62 printf("failed\n");63 }64 65 66 gets(sendbuff);67 len2=sizeof(sendbuff);68 // PJ_LOG(3,("string","%s",sendbuff));69 status=pj_sock_sendto(ss,sendbuff,&len2,0,&saddr,sizeof(saddr));70 if(status!=PJ_SUCCESS)71 {72 PJ_LOG(3,("send","failed"));73 }74 else75 { 76 77 }78 79 } 80 81 82 getchar();83 return 0;84 }
1 //UDP test 2 //Client 3 //heat nan 4 #include5 #define UDP_PORT 6000 6 #define ADDRESS "127.0.0.1" 7 #define N 50 8 #define M 100 9 int main()10 {11 pj_status_t status;12 pj_ssize_t len1,len2;13 pj_sock_t cs,ss;14 pj_sockaddr_in daddr,saddr;15 pj_str_t s;16 pj_str_t* IP_Addr;17 char recvbuff[M+5],sendbuff[N+5];18 status=pj_init();19 20 if(status!=PJ_SUCCESS)21 {22 PJ_LOG(3,("pj_init","failed"));23 }24 25 status=pj_sock_socket(pj_AF_INET(),pj_SOCK_DGRAM(),0,&cs);26 if(status!=0)27 {28 PJ_LOG(3,("creat cs socket","failed"));29 }30 31 pj_bzero(&daddr,sizeof(daddr));32 daddr.sin_family=pj_AF_INET();33 daddr.sin_port=pj_htons(UDP_PORT);34 IP_Addr=pj_cstr(&s,ADDRESS);35 daddr.sin_addr=pj_inet_addr(IP_Addr);36 37 pj_bzero(&saddr,sizeof(saddr));38 saddr.sin_family=pj_AF_INET();39 saddr.sin_port=pj_htons(UDP_PORT-1);40 IP_Addr=pj_cstr(&s,ADDRESS);41 saddr.sin_addr=pj_inet_addr(IP_Addr);42 43 44 status=pj_sock_bind(cs,&saddr,sizeof(saddr));45 if(status!=0)46 {47 PJ_LOG(3,("pj_sock_bind ","bind ss failed"));48 }49 50 /*51 len1=N;52 pj_create_random_string(sendbuff, N);53 sendbuff[N-1] = '\0';54 */55 while(1){56 gets(sendbuff);57 len1=sizeof(sendbuff);58 // PJ_LOG(3,("string","%s",sendbuff));59 status=pj_sock_sendto(cs,sendbuff,&len1,0,&daddr,sizeof(daddr));60 if(status!=PJ_SUCCESS)61 {62 PJ_LOG(3,("sendto","failed"));63 }64 65 66 len2=M;67 status=pj_sock_recv(cs,recvbuff,&len2,0);68 if(status!=PJ_SUCCESS)69 {70 PJ_LOG(3,("recvfrom","failed"));71 }72 else73 {74 PJ_LOG(3,("context","%s",recvbuff));75 }76 }77 78 getchar();79 80 }