在套接字UDP上使用Getaddrinfo()和SendTo()失败-分段错误(核心转储)

开始使用getaddrinfo((检索动态IP地址后，套接字的sendTo((不再工作，并返回错误"Segmentation fault(core dumped("。为什么会发生这种情况，请问我的代码中是否缺少初始化或内存分配？我试了很长时间，但还没弄清楚原因。任何帮助都将不胜感激！

以下是代码部分：

    // variables declaration
    int s;
    struct sockaddr_in si_other;
    struct addrinfo hints;     
    struct addrinfo *result, *rp;
    char *hostname = "localhost"; 
    const char* portnum = "8000"; 
    // settings of hints
    memset(&hints, 0, sizeof(struct addrinfo));
    hints.ai_family = AF_UNSPEC;    /* Allow IPv4 or IPv6 */
    hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */
    hints.ai_flags = 0;
    hints.ai_protocol = 0;
    hints.ai_flags = AI_NUMERICSERV;
    // resolve dynamically IP adress by getaddrinfo()
    s = getaddrinfo(hostname, NULL, &hints, &result); 
    if (s != 0) {
            fprintf(stderr, "getaddrinfo: %sn", gai_strerror(s));exit(EXIT_FAILURE);
    }
    // create socket s
    for (rp = result; rp != NULL; rp = rp->ai_next) 
    {
            s = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
    }
    // loop for sending m x struct ECA_message_t 
    int m=0;
for (; m<NbMesPerFile; ++m) 
    {
            ECA_message_t* ECA_paquet;
            ECA_paquet=(ECA_message_t*)malloc(sizeof(ECA_message_t)*2400); 
            // 2400 to workaround some not understood memory issue and make sendto() to 
            // work  
            // function initializing ECA_paquet
            Client_update_ECA_data(ECA_paquet,m);
            if (sendto(s, ECA_paquet, sizeof(ECA_paquet)*2400, 0 ,(struct 
                  sockaddr*)&si_other,slen)==-1)
    {
        perror("sendto()");
    }
    }

要向我的结构添加详细信息，并找出我的malloc(sizeof(ECA_message_t((出错的原因，请参阅下面结构ECA_message_t:的代码

typedef struct{
unsigned int version:2;
unsigned int p:1;
unsigned int x:1;
unsigned int cc:4;
unsigned int m:1;
unsigned int pt:7;
unsigned int seq:16;
u_int32_t timestamp;
u_int32_t ssrc;
u_int32_t csrc;
} RTP_header_t;             // 16 bytes

typedef struct {
unsigned int version:2;
unsigned int reserved_1:6;
unsigned int reserved_2:8;
unsigned int number_sample:16;
}ECA_header_t;              // 4 bytes
typedef struct {
//every line composed of 6 values, 2 byte per value, all signed
int32_t v_phase_1;
int32_t v_phase_2;
int32_t v_phase_3;
int32_t i_phase_1;
int32_t i_phase_2;
int32_t i_phase_3;
}ECA_payload_t;             // 12 bytes
typedef struct {
RTP_header_t rtp_header;
ECA_header_t eca_header;
ECA_payload_t eca_payload[MAX_ECA_SAMPLES]; // MAX_ECA_SAMPLES of 100
}ECA_message_t;             // 1220 bytes

这是Aborted(Core dumppted(Back trace消息：

*** glibc detected *** ./clientUDPIniDyn: double free or corruption (!prev): 0x081768c8 ***
 ======= Backtrace: =========
 /lib/i386-linux-gnu/libc.so.6(+0x75ee2)[0xb7642ee2]
 ./clientUDPIniDyn[0x804896b]
 /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb75e64d3]
 ./clientUDPIniDyn[0x80486b1]
 ======= Memory map: ========
 08048000-0804a000 r-xp 00000000 08:01 1319522    /home/lin/ULB/Memoire/Client_Server
 /Server/clientUDPIniDyn
 0804a000-0804b000 r--p 00001000 08:01 1319522    /home/lin/ULB/Memoire/Client_Server
 /Server/clientUDPIniDyn
 0804b000-0804c000 rw-p 00002000 08:01 1319522    /home/lin/ULB/Memoire/Client_Server
 /Server/clientUDPIniDyn
 08176000-08197000 rw-p 00000000 00:00 0          [heap]
 b7589000-b75a5000 r-xp 00000000 08:05 264147     /lib/i386-linux-gnu/libgcc_s.so.1
 b75a5000-b75a6000 r--p 0001b000 08:05 264147     /lib/i386-linux-gnu/libgcc_s.so.1
 b75a6000-b75a7000 rw-p 0001c000 08:05 264147     /lib/i386-linux-gnu/libgcc_s.so.1
 b75bf000-b75ca000 r-xp 00000000 08:05 293796     /lib/i386-linux-gnu/libnss_files-
 2.15.so
 b75ca000-b75cb000 r--p 0000a000 08:05 293796     /lib/i386-linux-gnu/libnss_files-
 2.15.so
 b75cb000-b75cc000 rw-p 0000b000 08:05 293796     /lib/i386-linux-gnu/libnss_files-
 2.15.so
 b75cc000-b75cd000 rw-p 00000000 00:00 0 
 b75cd000-b7770000 r-xp 00000000 08:05 293791     /lib/i386-linux-gnu/libc-2.15.so
 b7770000-b7771000 ---p 001a3000 08:05 293791     /lib/i386-linux-gnu/libc-2.15.so
 b7771000-b7773000 r--p 001a3000 08:05 293791     /lib/i386-linux-gnu/libc-2.15.so
 b7773000-b7774000 rw-p 001a5000 08:05 293791     /lib/i386-linux-gnu/libc-2.15.so
 b7774000-b7777000 rw-p 00000000 00:00 0 
 b778d000-b7791000 rw-p 00000000 00:00 0 
 b7791000-b7792000 r-xp 00000000 00:00 0          [vdso]
 b7792000-b77b2000 r-xp 00000000 08:05 293804     /lib/i386-linux-gnu/ld-2.15.so
 b77b2000-b77b3000 r--p 0001f000 08:05 293804     /lib/i386-linux-gnu/ld-2.15.so
 b77b3000-b77b4000 rw-p 00020000 08:05 293804     /lib/i386-linux-gnu/ld-2.15.so
 bfbad000-bfbce000 rw-p 00000000 00:00 0          [stack]
 Aborted (core dumped)