socket addr赋值

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#include <iostream> #include <string> using namespace std;   #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <memory.h> #include <sys/socket.h> #include <netinet/in.h> #include <sys/socket.h> #include <stdarg.h> #include <arpa/inet.h> typedef uint32_t u32; typedef uint8_t u8; typedef uint16_t u16; typedef struct sockaddr_in  SU_addr;     #undef IP_MAX_SIZE #define IP_MAX_SIZE 32   void SU_socketSetAddr(SU_addr* addr,char* ip, u16 port) {     memset(addr, 0, sizeof(struct sockaddr_in));     addr->sin_family     = AF_INET;     addr->sin_port           = htons(port);     addr->sin_addr.s_addr    = inet_addr(ip); }   char* SU_addrToString(SU_addr* addr, char* str, int len) {     if (len < 24 || addr == NULL || str == NULL)            return NULL;       ::inet_ntop(addr->sin_family, &(addr->sin_addr), str, len);     sprintf(str, "%s:%d", str, ntohs(addr->sin_port));   cout<<"str is"<<str<<endl;     return str; }   /*将ip地址字符串"x.x.x.x:p"转化成SU_addr结构*/ static int string_to_addr(const char* str, SU_addr* addr) {     char ipstr[IP_MAX_SIZE] = { 0 };     char* pos = (char*)str;     char* dest = ipstr;     uint16_t port = 0;       while (*pos != '\0'){         if (*pos == ':')             break;         *dest++ = *pos ++;     }       if (*pos == '\0')         return -1;       pos++;     port = atoi(pos);     SU_socketSetAddr(addr, ipstr, port);     return 0; }   int main() {   SU_addr addr;   string_to_addr("192.168.1.100:8000",&addr);   cout<<ntohs(addr.sin_port)<<endl;   char str[32];   cout<<SU_addrToString(&addr,str,32)<<endl; //  cout<<addr.sin_addr.s_addr<<endl;  // cout<<str<<endl;               return 0; }